摘要：
In uranium(VI) (U(VI)) photoreduction, it is still a challenge to simultaneously degrade naturally coexisting organics and explore their impact on U(VI) photoreduction. Meanwhile, how to boost the separation and transport capability of photo-induced carriers is also a hot topic of current research. In this work, an ultrathin Bi 2 WO 6 /Bi 2 MoO 6 Z-type heterojunction was developed for the simultaneous treatment of U(VI) and its co-existing organics (tannic acid (TA)). Ultrathin interface engineering increased the contact area and shortened the transmission distance of photo-induced carriers. As a result, ultrathin Bi 2 WO 6 /Bi 2 MoO 6 exhibited highly efficient U(VI) removal rate (95.8 %) and TA degradation rate (97.2 %), which were much higher than those of bulk Bi 2 WO 6 /Bi 2 MoO 6 and single ultrathin Bi 2 WO 6 . In addition, the material possessed excellent stability and recyclability. Importantly, TA not only enhanced U(VI) removal by eliminating holes, but also favored U(VI) removal by serving as a bridge to the catalyst for U(VI) adsorption. Finally, a new mechanism was proposed.
In uranium(VI) (U(VI)) photoreduction, it is still a challenge to simultaneously degrade naturally coexisting organics and explore their impact on U(VI) photoreduction. Meanwhile, how to boost the separation and transport capability of photo-induced carriers is also a hot topic of current research. In this work, an ultrathin Bi 2 WO 6 /Bi 2 MoO 6 Z-type heterojunction was developed for the simultaneous treatment of U(VI) and its co-existing organics (tannic acid (TA)). Ultrathin interface engineering increased the contact area and shortened the transmission distance of photo-induced carriers. As a result, ultrathin Bi 2 WO 6 /Bi 2 MoO 6 exhibited highly efficient U(VI) removal rate (95.8 %) and TA degradation rate (97.2 %), which were much higher than those of bulk Bi 2 WO 6 /Bi 2 MoO 6 and single ultrathin Bi 2 WO 6 . In addition, the material possessed excellent stability and recyclability. Importantly, TA not only enhanced U(VI) removal by eliminating holes, but also favored U(VI) removal by serving as a bridge to the catalyst for U(VI) adsorption. Finally, a new mechanism was proposed.
通讯机构：
[Gu, YL ] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421000, Hunan, Peoples R China.
关键词：
Composite transparent polyimide film;Flexible display;Finite element analysis
摘要：
Polyimide is a high-performance polymer material that is widely used in the manufacture of printed circuit boards, cable insulation, and other electronic components because of its excellent electrical insulation properties and thermal stability. In this study, a transparent polyimide composite film material (5% CPI/OAPOSS@Al2O3) made from octaaminophenylpolysilsesquioxane (OAPOSS)-modified Al2O3 (in which the OAPOSS-modified Al2O3 filler content is 5%) homogeneously dispersed in a transparent polyimide (CPI) was used, and a foldable screen model made from the polyimide material was designed. A folding screen model made of this polyimide material was designed, and its performance in a complex mechanical environment was analyzed by detailed finite element simulation, to obtain the comprehensive performance of the composite folding screen model in a complex environment, and to try to analyze the law of the material performance in terms of the microscopic molecular structure. The simulation results show that the maximum equivalent stress of the composite CPI material in the folded screen model increases from 33.431 Mpa to 109.640 Mpa under the bending angles of 15 degrees, 45 degrees, 90 degrees, 135 degrees and 180 degrees; the elastic strain increases from 0.010131 mm/mm to 0.033224 mm/mm; and the total deformation increases from 1.762 mm to 71 mm. 1.762 mm to 71.439 mm, indicating that the 5% CPI/OAPOSS@Al2O3 composite CPI material has excellent mechanical strength and toughness, can be reversibly deformed in a wide range, and can withstand a certain degree of plastic deformation in the case of exceeding the elastic limit; the coefficient of safety is reduced from 2.5784 to 0.7862, which indicates that it can absorb enough energy during bending and has a certain plastic deformation ability, and is not prone to brittle fracture; the fatigue life of the composite material is 250,370 times when it is folded for many cycles under the condition that the bending angle is 180 degrees, i.e., the material is able to withstand many times of bending in the model of the folded screen without any significant damage or destruction. The results show that the folding screen model made of the composite material has excellent performance in all aspects, indicating that the 5% CPI/OAPOSS@Al2O3 material is fully capable of being applied in the folding screen cell phone screen, and the application of this series of polyimide-modified materials as flexible displays has a very bright future.
摘要：
The formation of aggregate always limits the reactive oxygen species generation efficacy of photosensitizer (PS). Developing PS with high performance under physiological environment is essential for the widespread application of photodynamic therapy (PDT) in clinic. In this work, platinum-based photosensitizers with adaptive confinement effect are designed and prepared for enhanced tumor PDT treatments. By introducing pyridinothiadiazole with sp 2 nitrogen hybridization and strong electron-withdrawing properties as the ligand, spin-orbit coupling (SOC) could be efficiently enhanced, accelerating intersystemic scampering (ISC) and ultimately improving the generation efficiency of reactive oxygen species (ROS). Firstly, the developed complexes effectively reduce the photosensitizing inhibition with the formation of aggregate, enabling more efficient photodynamic activity under physiological conditions. Secondly, both experimental and simulative investigations support the high affinity of Pt-based PSs towards biomacromolecules, which allows for the acquisition of confinement effect. The relatively high binding affinity with biomacromolecules enables the improved photosensitizing ability of PSs compared to the individual ones, which is highly desirable for practical therapy applications. Finaly, in vitro cytotoxicity exploration reveals that Pt-based complexes will trigger the oxidative stress and further induce ferroptosis of tumor cells to eradicate tumor cell upon white light irradiation. The desirable tumor inhibition in vivo is also achieved. This work provides a reliable strategy to construct PSs with high performance to address the various demands PDT treatments in clinical.
The formation of aggregate always limits the reactive oxygen species generation efficacy of photosensitizer (PS). Developing PS with high performance under physiological environment is essential for the widespread application of photodynamic therapy (PDT) in clinic. In this work, platinum-based photosensitizers with adaptive confinement effect are designed and prepared for enhanced tumor PDT treatments. By introducing pyridinothiadiazole with sp 2 nitrogen hybridization and strong electron-withdrawing properties as the ligand, spin-orbit coupling (SOC) could be efficiently enhanced, accelerating intersystemic scampering (ISC) and ultimately improving the generation efficiency of reactive oxygen species (ROS). Firstly, the developed complexes effectively reduce the photosensitizing inhibition with the formation of aggregate, enabling more efficient photodynamic activity under physiological conditions. Secondly, both experimental and simulative investigations support the high affinity of Pt-based PSs towards biomacromolecules, which allows for the acquisition of confinement effect. The relatively high binding affinity with biomacromolecules enables the improved photosensitizing ability of PSs compared to the individual ones, which is highly desirable for practical therapy applications. Finaly, in vitro cytotoxicity exploration reveals that Pt-based complexes will trigger the oxidative stress and further induce ferroptosis of tumor cells to eradicate tumor cell upon white light irradiation. The desirable tumor inhibition in vivo is also achieved. This work provides a reliable strategy to construct PSs with high performance to address the various demands PDT treatments in clinical.
摘要：
Research continues to be heavily focused on the synthesis of silver nanoparticles (Ag NPs) with programmable characteristics for various potential applications. In this study, a wet-chemical method was applied to synthesize Ag NPs modified with 3-aminopropyltriethoxysilane (APTES). A number of variables, including reaction time, temperature, precursor concentration, and the molar ratio of the raw components, were systematically investigated to modulate the structures and surface plasmon resonance (SPR) properties of Ag NPs. Notably, the Ag NPs demonstrated pronounced temperature- and/or time-dependent plasmonic effects owing to the transition between spherical Ag NPs capped by silanols or organosilicon oligomers and aggregated NPs coated with polysiloxane. Extending the reaction time (within a temperature range from 60 degrees C to 80 degrees C) facilitated the plasmonic coupling of spherical Ag NPs into aggregation, whereas an increase in reaction temperature promoted the formation of monodispersed spherical Ag NPs. The controllable SPR properties of Ag NPs, attributed to the transition between monodisperse and aggregated states, may prove advantageous for their prospective applications in chemical and biological sensing, analytical techniques, catalysis, as well as in diagnostic and therapeutic contexts.
摘要：
In this paper, a novel bifunctional molecule dialkyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DAHAOEP) containing both phosphoryl and hydroxamic groups was designed and synthesized, and used as a uranium extractant. The extraction properties of DAHAOEP were focused. Dihexyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DHHAOEP) was shown to have a better extraction effect on uranyl ions than dibutyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DBHAOEP) and diethyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DEHAOEP). Under the optimal extraction conditions, the extraction efficiency of DHHAOEP on uranyl ions could reach up to 98 %. Extraction saturation capacity, reusability and selectivity results indicated that the saturation capacity of DHHAOEP continuous extraction can reach 596 % after 10 times of extraction, DHHAOEP had been recycled more than 5 times, and exhibited a superior selectivity for uranyl ions. Slope method showed that DHHAOEP mainly coordinated with uranyl ions in a 1:2 coordination, i.e., monomolecular bidentate coordination M2L. FTIR and XPS analysis further confirmed that DHHAOEP combined with uranyl ions through it’s -C(=O)-NHOH and P = O groups to form a five-membered ring and P-O-U configuration, respectively.
In this paper, a novel bifunctional molecule dialkyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DAHAOEP) containing both phosphoryl and hydroxamic groups was designed and synthesized, and used as a uranium extractant. The extraction properties of DAHAOEP were focused. Dihexyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DHHAOEP) was shown to have a better extraction effect on uranyl ions than dibutyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DBHAOEP) and diethyl (2-(hydroxyamino)-2-oxoethyl) phosphonate (DEHAOEP). Under the optimal extraction conditions, the extraction efficiency of DHHAOEP on uranyl ions could reach up to 98 %. Extraction saturation capacity, reusability and selectivity results indicated that the saturation capacity of DHHAOEP continuous extraction can reach 596 % after 10 times of extraction, DHHAOEP had been recycled more than 5 times, and exhibited a superior selectivity for uranyl ions. Slope method showed that DHHAOEP mainly coordinated with uranyl ions in a 1:2 coordination, i.e., monomolecular bidentate coordination M2L. FTIR and XPS analysis further confirmed that DHHAOEP combined with uranyl ions through it’s -C(=O)-NHOH and P = O groups to form a five-membered ring and P-O-U configuration, respectively.
期刊：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2025年27(5):2828-2833 ISSN：1463-9076
通讯作者：
Liu, Xichun;Lin, YW
作者机构：
[Han, Hui; Pan, Aiqun; Lin, Ying-Wu; Liu, Xichun; Liu, XC] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Gao, Shu-Qin; Lin, Ying-Wu] Univ South China, Lab Prot Struct & Funct, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, YW ; Liu, XC] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Univ South China, Lab Prot Struct & Funct, Hengyang 421001, Peoples R China.
摘要：
Globin X is a newly discovered member of the globin family, while its structure and function are not fully understood. In this study, we performed protein modelling studies using Alphafold3 and molecular dynamics simulations, which suggested that the protein adopts a typical globin fold, with the formation of a potential disulfide bond of Cys65 and Cys141. To elucidate the role of this unique disulfide in protein structure and stability, we constructed a double mutant of C65S/C141S by mutating the two cysteine residues to serine. As suggested by protein mass, ultraviolet-visible (UV-Vis) and circular dichroism (CD) spectroscopy analyses, the potential disulfide bond has minimal effect on the overall protein structure, but its absence reduces the protein stability. Electron paramagnetic resonance (EPR) analysis also revealed an increase in the proportion of high-spin state heme iron, which accelerates the rate of heme degradation in reaction with H(2)O(2). This study highlights the critical role of the Cys65-Cys141 in maintaining the stability of globin X and the bis-His heme coordination state, providing insights into the structure-function relationship of the newly discovered globin.
作者：
Ji, Hong-Tao;Lu, Yu-Han;Liu, Yan-Ting;Huang, Yu-Lin;Tian, Jiang-Feng;...
期刊：
中国化学快报：英文版,2025年36(2):110568 ISSN：1001-8417
通讯作者：
Zhang, YH;He, WM
作者机构：
[Liu, Yan-Ting; Liu, Feng; Ji, Hong-Tao; Huang, Yu-Lin; Zhang, Yong-Hong] Univ South China, Affiliated Nanhua Hosp, Hengyang Med Sch, Dept Ophthalmol, Hengyang 421001, Peoples R China.;[Zeng, Yan-Yan; Lu, Yu-Han; He, Wei-Min; Tian, Jiang-Feng; Ji, Hong-Tao; He, WM] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Yang, Hai-Yan] Cent South Univ, Hunan Canc Hosp, Affiliated Canc Hosp,Xiangya Sch Med, Dept Lung Canc & Gastroenterol, Changsha 410013, Peoples R China.
通讯机构：
[Zhang, YH ; He, WM ] U;Univ South China, Affiliated Nanhua Hosp, Hengyang Med Sch, Dept Ophthalmol, Hengyang 421001, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Dual catalysis;Semiconductor;Chlorine;Redox catalyst;Hydrogen atom transfer
摘要：
The first example of Nd@C3N4-photoredox/chlorine dual catalyzed alkylation with unactivated alkanes as the alkyl sources has been developed, which allows for the synthesis of various 4-alkylated cyclic sulfonyl ketimines. In this process, chlorine functions as both a redox and hydrogen atom transfer catalyst. The synergism of the reversible Nd2+/Nd3+ and Cl¯/Cl˙ redox pairs significantly enhances overall photocatalytic efficiency. The in vitro anticancer activity of 4-alkylated products was evaluated by using the CCK8 assay against both human choroidal melanoma (MUM-2B) and lung cancer (A549) cell. Compound 3da showed approximately triple the potency of 5-fluorouracil.
The first example of Nd@C3N4-photoredox/chlorine dual catalyzed alkylation with unactivated alkanes as the alkyl sources has been developed, which allows for the synthesis of various 4-alkylated cyclic sulfonyl ketimines. In this process, chlorine functions as both a redox and hydrogen atom transfer catalyst. The synergism of the reversible Nd2+/Nd3+ and Cl¯/Cl˙ redox pairs significantly enhances overall photocatalytic efficiency. The in vitro anticancer activity of 4-alkylated products was evaluated by using the CCK8 assay against both human choroidal melanoma (MUM-2B) and lung cancer (A549) cell. Compound 3da showed approximately triple the potency of 5-fluorouracil.
摘要：
The rapid and selective identification of microorganisms is of great significance for clinical therapy applications. To develop high performance probes for microbe determination, we systemically constructed series aggregation-induced emission (AIE) luminogens by modulating the structural planarity, the basicity of functional group, the length of linker moiety and the hydrophobicity based on our previous work. The detail structure-property relationship study based on experimental and theoretical observation revealed that: i) the planar skeleton is essential for probe insertion towards the cell wall via van n der Waals' force. ii) the basic function group enable the anchoring on the membrane by binding with acidic biomolecules. iii) the shortened alkyl chain is in favor of the efficient binding of basic groups with microbes and endows the desirable hydrophobicity. Based on the developed probes, the successful detection of the pathogens in clinic samples was achieved in highly sensitive and simple way. This work provides a reliable strategy for designing intelligent luminogens for microorganism discrimination and identification in efficient and sensitive way for in vitro diagnosis applications, especially point-of-care testing (POCT).
The rapid and selective identification of microorganisms is of great significance for clinical therapy applications. To develop high performance probes for microbe determination, we systemically constructed series aggregation-induced emission (AIE) luminogens by modulating the structural planarity, the basicity of functional group, the length of linker moiety and the hydrophobicity based on our previous work. The detail structure-property relationship study based on experimental and theoretical observation revealed that: i) the planar skeleton is essential for probe insertion towards the cell wall via van n der Waals' force. ii) the basic function group enable the anchoring on the membrane by binding with acidic biomolecules. iii) the shortened alkyl chain is in favor of the efficient binding of basic groups with microbes and endows the desirable hydrophobicity. Based on the developed probes, the successful detection of the pathogens in clinic samples was achieved in highly sensitive and simple way. This work provides a reliable strategy for designing intelligent luminogens for microorganism discrimination and identification in efficient and sensitive way for in vitro diagnosis applications, especially point-of-care testing (POCT).
摘要：
With Ag/g‐C 3 N 4 semiconductor as the heterogeneous photocatalyst, the visible light promoted heterogeneous synthesis of unsymmetric diaryl chalcogenides could be achieved under additive‐free and mild conditions. A series of unsymmetric diaryl chalcogenides were generated in good to excellent yields with high functional group tolerance. The Ag/g‐C 3 N 4 photocatalyst is easily recovered from the reaction mixture and reused at least 5 times, opening the way for larger‐scale industrial applications of this type of photocatalytic bond‐forming reactions.
With Ag/g‐C 3 N 4 semiconductor as the heterogeneous photocatalyst, the visible light promoted heterogeneous synthesis of unsymmetric diaryl chalcogenides could be achieved under additive‐free and mild conditions. A series of unsymmetric diaryl chalcogenides were generated in good to excellent yields with high functional group tolerance. The Ag/g‐C 3 N 4 photocatalyst is easily recovered from the reaction mixture and reused at least 5 times, opening the way for larger‐scale industrial applications of this type of photocatalytic bond‐forming reactions.
作者机构：
[Chen, Qianwen; Li, Qiulin; Bao, Shu-Juan; Tan, Yangyang; Bao, SJ; Ma, Yan-Dong; He, Ruilin] Southwest Univ, Inst Clean Energy & Adv Mat, Fac Mat & Energy, Key Lab Luminescent & Real Time Analyt Chem,Minist, Chongqing 400715, Peoples R China.;[Deng, Zhiqin; Liu, Heng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Chen, Qianwen; Li, Qiulin; Bao, Shu-Juan; Tan, Yangyang; Bao, SJ; Ma, Yan-Dong; He, Ruilin] Southwest Univ, Chongqing Key Lab Battery Mat & Technol, Chongqing 400715, Peoples R China.
通讯机构：
[Bao, SJ ] S;[Liu, H ] U;Southwest Univ, Inst Clean Energy & Adv Mat, Fac Mat & Energy, Key Lab Luminescent & Real Time Analyt Chem,Minist, Chongqing 400715, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;Southwest Univ, Chongqing Key Lab Battery Mat & Technol, Chongqing 400715, Peoples R China.
摘要：
Iron carbide assisted Fe–N–C electrocatalysts have attracted significant attention as promising candidates to enhance intrinsic activity in the oxygen reduction reaction (ORR), offering a viable alternative to Pt-based catalysts. However, their widespread development is impeded by challenges such as uncontrolled aggregation, the formation of large nanoparticles, and inefficient synthesis processes. Herein, we report a multiligand coordination self-assembly strategy to synthesize a novel metal–organic framework (MOF) precursor (FeZn-PBMI) with dual ligands and dual metals, followed by a thermal polymerization self-assembly process that successfully prepared FeN x sites and Fe x C atomic clusters decorating N-doped carbon nanotubes (Fe x C@FeNCNTs) in gram-scale quantities. The ordered distribution of Zn and Fe within the FeZn-PBMI effectively prevents Fe aggregation during high-temperature pyrolysis, resulting in uniformly dispersed approximately 10 nm Fe x C nanoparticles. As expected, the Fe x C@FeNCNTs exhibit superior ORR performance with a half-wave potential of 0.87 V, surpassing commercial Pt/C (0.85 V), and demonstrate excellent long-term stability in Zn–air batteries with 1000 cycles. This synthetic approach may facilitate the development of highly active catalysts, advancing the practical application of Fe–N–C catalysts in various energy-related technologies.
摘要：
The sensitive detection of the radioactive thorium (Th) ion with an oxidation state of +4 (Th(4+)) is of great significance for environmental protection and life safety. In this study, five fluorescence sensors with regulated donor-acceptor (D-A) interactions were constructed for Th(4+) detection based on intramolecular charge transfer and aggregation-induced emission mechanisms. Among the developed sensors, TPE-D bearing electron-deficient π-bridge and weak D-A interactions presented ratiometric fluorescence detection behavior toward Th(4+) in aqueous solution due to its aggregation-induced emission characteristics and unique D-A-D structures. Moreover, TPE-D showed excellent selectivity and sensitivity for Th(4+) detection, and the detection limit was as low as 8.1 × 10(-8) M. The sensing mechanism observation revealed that Th(4+) could coordinate with the hydroxyl, imine, and carbonyl groups of TPE-D accompanied by an electron transfer process. In addition, TPE-D could selectively be enriched in the lysosome. Both the detection of Th(4+) in the lysosome and liver of mice and zebrafish were realized based on this strategy, and a mobile-assisted detection approach toward Th(4+) in actual water samples was also established with high sensitivity. This is the first report for Th(4+) detection in organelles and organs, which provides a great significance and reliable strategy for radionuclide toxicology detection and analysis applications.
摘要：
The rapid growth of nuclear energy technology, along with the expansion of global nuclear power projects, has led to a significant increase in high-level radioactive wastes (HLWs), particularly spent fuel from nuclear power plants. The disposal of HLWs remains a major challenge due to its high radioactivity, long half-lives, and complex management requirements. Ensuring the long-term safety of HLW disposal is critical for the sustainable development of nuclear energy. Currently, deep geological disposal is considered the most effective and secure method for isolating HLW. This method relies on a multi-barrier system that combines natural geological barriers with artificial engineering barriers to achieve the long-term isolation of radioactive wastes. Engineering barriers, including waste containers, buffering materials, and backfill materials, are essential for preventing radioactive leakage and maintaining isolation in the face of geological and environmental changes. Recent studies have focused on the design and optimization of these barriers, particularly their impact on the migration of key radioactive nuclides. Insights from international practices and technological advancements have highlighted the importance of materials like bentonite, disposal containers, and other engineering barriers in optimizing multi-barrier systems for HLW disposal. Bentonite, a widely used buffering material, is known for its excellent adsorption properties and low permeability. Recent modifications to bentonite have enhanced its ability to adsorb radioactive nuclides such as cesium (Cs) and plutonium (Pu), significantly improving the safety and long-term stability of disposal facilities. Additionally, the migration mechanisms of radioactive nuclides have been examined, with particular attention to the influence of hydrochemical conditions—such as hydration, ion concentration, and pH—on bentonite's adsorption capabilities. This study sheds light on the migration pathways and rates of these nuclides in HLW disposal systems. Another key area of focus is the materials used for disposal containers, particularly cement-based and metal materials, which play a critical role in mitigating corrosion risks during long-term storage. While experimental data show promising corrosion resistance under specific conditions, continued researches are necessary to evaluate the long-term durability of these materials. These findings provide valuable theoretical insights for the engineering design of HLW geological disposal, offering references for the site selection, design, and material optimization of disposal facilities, particularly in China. As experimental data and theoretical models continue to evolve, future safety assessments and long-term behavior predictions will become more accurate. By promoting international collaboration and interdisciplinary research, these efforts contribute to the development of a scientific foundation for the safe and sustainable disposal of HLWs, ensuring environmental safety and the long-term effectiveness of waste management strategies.
The rapid growth of nuclear energy technology, along with the expansion of global nuclear power projects, has led to a significant increase in high-level radioactive wastes (HLWs), particularly spent fuel from nuclear power plants. The disposal of HLWs remains a major challenge due to its high radioactivity, long half-lives, and complex management requirements. Ensuring the long-term safety of HLW disposal is critical for the sustainable development of nuclear energy. Currently, deep geological disposal is considered the most effective and secure method for isolating HLW. This method relies on a multi-barrier system that combines natural geological barriers with artificial engineering barriers to achieve the long-term isolation of radioactive wastes. Engineering barriers, including waste containers, buffering materials, and backfill materials, are essential for preventing radioactive leakage and maintaining isolation in the face of geological and environmental changes. Recent studies have focused on the design and optimization of these barriers, particularly their impact on the migration of key radioactive nuclides. Insights from international practices and technological advancements have highlighted the importance of materials like bentonite, disposal containers, and other engineering barriers in optimizing multi-barrier systems for HLW disposal. Bentonite, a widely used buffering material, is known for its excellent adsorption properties and low permeability. Recent modifications to bentonite have enhanced its ability to adsorb radioactive nuclides such as cesium (Cs) and plutonium (Pu), significantly improving the safety and long-term stability of disposal facilities. Additionally, the migration mechanisms of radioactive nuclides have been examined, with particular attention to the influence of hydrochemical conditions—such as hydration, ion concentration, and pH—on bentonite's adsorption capabilities. This study sheds light on the migration pathways and rates of these nuclides in HLW disposal systems. Another key area of focus is the materials used for disposal containers, particularly cement-based and metal materials, which play a critical role in mitigating corrosion risks during long-term storage. While experimental data show promising corrosion resistance under specific conditions, continued researches are necessary to evaluate the long-term durability of these materials. These findings provide valuable theoretical insights for the engineering design of HLW geological disposal, offering references for the site selection, design, and material optimization of disposal facilities, particularly in China. As experimental data and theoretical models continue to evolve, future safety assessments and long-term behavior predictions will become more accurate. By promoting international collaboration and interdisciplinary research, these efforts contribute to the development of a scientific foundation for the safe and sustainable disposal of HLWs, ensuring environmental safety and the long-term effectiveness of waste management strategies.
摘要：
The magnetic properties of double perovskite oxide RE 2 FeCrO 6 (RE = GD, Tb, Dy, Er) were systematically studied, and the Griffiths phase evolution was observed. In Tb 2 FeCrO 6 , Dy 2 FeCrO 6 , and Er 2 FeCrO 6 , there are antiferromagnetic (AFM)-ferromagnetic (FM) first-order phase transition and the Griffiths phase with coexistence of FM and paramagnetic (PM) was observed by the EPR spectra. Gd 2 FeCrO 6 has an AFM–PM second-order phase transition, and there is no first-order phase transition in the range of ∆ H = 0–50 kOe. As the temperature decreases, all four sets of samples present χ −1 ( T ) deviates downwards from the Curie–Weiss linear behavior from 0.2 to 5 kOe, corresponding to the typical characteristics of Griffiths phase evolution. In addition, all four sets of samples have excellent magnetocaloric performance. Especially, the Gd 2 FeCrO 6 oxide has giant magnetic entropy change and relative cooling power (−∆ S M max = 30.31 J/kg K and RCP = 312.8 J/kg when ∆ H = 50 kOe). From the perspective of low-temperature magnetic refrigeration application, the present work provides important candidate references for magnetic component researchers.
作者机构：
[Yang, Minghui; Chen, Fei; Liu, You-Nian; Deng, Liu] Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Micro & Nano Mat Interface Sci, Changsha 410083, Hunan, Peoples R China.;[Chen, Fei] Xinjiang Med Univ, Coll Pharm, Xinjiang Key Lab Nat Med Act Components & Drug Rel, Urumqi 830017, Xinjiang, Peoples R China.;[Wang, Liqiang] Zhengzhou Univ, Henan Prov Ind Technol Res Inst Resources & Mat, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China.;[He, Haichuan] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Liu, You-Nian] Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 311121, Zhejiang, Peoples R China.
通讯机构：
[He, HC ] U;[Liu, YN ] C;Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Micro & Nano Mat Interface Sci, Changsha 410083, Hunan, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 311121, Zhejiang, Peoples R China.
摘要：
Carbon-supported non-noble metal-based catalysts display remarkable catalytic activity and cost-effectiveness in electrochemical CO2 reduction reaction (eCO2RR). However, precise control of the crystal facet of metal catalysts and prevention of deactivation caused by agglomeration remain challenges. Herein, a novel dual-function customized strategy is presented for the preparation of the N-doped carbon-supported Ni-based porous catalyst with carbon-encapsulated Ni(111) nanoparticles (Ni(111)@C-NDPC), through carbonizing the self-assembly of protein-Ni-ions networks and ethylenediaminetetraacetic acid (EDTA)-chelated Ni-ions (EDTA-Ni). High exposure of the (111) surface of carbon-encapsulated nickel nanoparticles is achieved through strong coordination between EDTA-Ni, thereby synergistically integrating the advantages of highly active Ni(111) and stable carbon-encapsulated structure formed by protein-Ni-ions networks. Theoretical calculations reveal that Ni(111) facilitates the formation of *COOH and inhibits the hydrogen evolution reaction. The as-prepared Ni(111)@C-NDPC electrocatalyst exhibits an excellent CO Faradaic efficiency (FECO) of 96.3% and stability over 50 h while maintaining FECO above 90% in a wide current density range of 50-300 mA cm-2. This work provides a new strategy for precisely customizing highly selective and durable carbon-supported metal eCO2RR electrocatalysts.
作者机构：
[Zhou, Daming; Qin, AJ; Zhang, Guiquan; Qin, Anjun] South China Univ Technol, Guangdong Prov Key Lab Luminescence Mol Aggregates, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;[Tang, Ben Zhong] Chinese Univ Hong Kong, Shenzhen Inst Aggregate Sci & Technol, Sch Sci & Engn, Shenzhen CUHK Shenzhen, Shenzhen 518172, Peoples R China.;[Hu, Rong; Hu, R] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Qin, AJ ] S;[Tang, BZ ] C;[Hu, R ] U;South China Univ Technol, Guangdong Prov Key Lab Luminescence Mol Aggregates, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;Chinese Univ Hong Kong, Shenzhen Inst Aggregate Sci & Technol, Sch Sci & Engn, Shenzhen CUHK Shenzhen, Shenzhen 518172, Peoples R China.
摘要：
Fluorescence imaging technology is playing increasing roles in modern personalized and precision medicine. Thanks to their excellent photophysical properties, organic luminogens featuring aggregation-induced emission (AIE) characteristics (AIEgens) have attracted considerable attention over the past two decades. Because of their superior biocompatibility, ease of processing and functionalization, excellent water solubility, high responsiveness, and exceptional signal-to-noise ratio (SNR) for biotargets, AIE bioconjugates, formed by covalently linking AIEgens with biomolecules, have emerged as an ideal candidate for bioapplications. In this review, we summarize the progress in preparation, properties, and application of AIE bioconjugates in the last five years. Moreover, the challenges and opportunities of AIE bioconjugates are also briefly discussed.
期刊：
Journal of Radioanalytical and Nuclear Chemistry,2025年334(1):709-726 ISSN：0236-5731
通讯作者：
Nie, Chang-ming;Peng, GW
作者机构：
[Peng, Guo-wen; Guo, Meng-zhen; Xiao, Xi-lin; Wang, Yun; Kong, Xiang-he; Peng, GW; Nie, Chang-ming; Wu, Can-ran; Ouyang, Wen-jun; Nie, CM] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Peng, Guo-wen; Guo, Meng-zhen; Xiao, Xi-lin; Wang, Yun; Kong, Xiang-he; Peng, GW; Nie, Chang-ming; Wu, Can-ran; Ouyang, Wen-jun; Nie, CM] Key Lab Hunan Prov Design & Applicat Nat Actinide, Hengyang 421001, Peoples R China.
通讯机构：
[Peng, GW ; Nie, CM] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Key Lab Hunan Prov Design & Applicat Nat Actinide, Hengyang 421001, Peoples R China.
关键词：
Chiral-at-uranium complex;R/S-O,O-dimethyl-S-[1,2-bis(ethoxycarbonyl)ethyl]thiophosphates (R/S-DBTPs);Complexation;Enantioseparation;Density functional theory (DFT)
摘要：
It's very important to design novel uranium(VI) complexes with enantioselectivity for identification and enantioseparation of chiral pesticides. Enantiomers of O,O-dimethyl-S-[1,2-bis(ethoxycarbonyl)ethyl]thiophosphates(DBTPs) exhibit different biological toxicities. In this work, two novel chiral-at-uranium complexes (uranyl-2-(9-(1H-indazole-1-carbonyl)-1,10-phenanthrolin-2-yl)-1H-inden-1-one (Uranyl-IPIDO) and uranyl-2-(9-(1-oxo-1H-inden-2-yl)-1,10-phenanthrolin-2-yl)naphthalene-1,4-dione (Uranyl-OPND)) were designed to selectively enantioseparate R/S-DBTPs. Based on density functional theory (DFT), complexation behaviors and enantioseparation of Uranyl-IPIDO/Uranyl-OPND with R/S-DBTPs were theoretically investigated. Through analyses of EDA, Delta G, ESP, QTAIM, EDDM, LOL, FMO, MO, IGMH, ETS-NOCV, we found that Uranyl-IPIDO/Uranyl-OPND demonstrated excellent enantioseparation performance for R/S-DBTPs, with separation factors of 110-30526 and enantioselectivity coefficients exceeding 99% in water, butanol, octanol, and propanoic acid.
通讯机构：
[Zhao, CW ; Xia, DD] J;[Jiang, L ] C;[Wan, LY ] N;Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China.;Jiangxi Acad Sci, Inst Appl Chem, Nanchang 330096, Peoples R China.
摘要：
In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated pi-extension as a secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of the device was significantly promoted from 18.45% in the binary system of PM6:BTP-eC9 to over 19% in the ternary system with a minimal Y-LC loading. This enhancement in performance can be attributed to the alloy-like structures of acceptors and the optimized active layer morphology, which leads to improved hole and electron mobilities, thereby suppressing charge recombination, and finally resulting in a higher photocurrent in the solar cells. Furthermore, a complementary absorption of Y-LC is observed with PM6 and BTP-eC9, which can broaden the absorption spectrum of the photoactive layer and enable more photons from sunlight to be absorbed. Additionally, Y-LC facilitates efficient charge transfer from the donor to the acceptor by forming cascade energy levels between PM6 and BTP-eC9. These advantages collectively contribute to the superior performance obtained in the ternary solar cells. This work also highlights that the adoption of a nonfullerene acceptor with suitable conjugated pi-extensions as a minor additive in ternary photovoltaics is a powerful approach for achieving the state-of-the-art organic solar cells.
期刊：
International Journal of Biological Macromolecules,2025年309(Pt 1):142768 ISSN：0141-8130
通讯作者：
Xu, JK
作者机构：
[Zhao, Sijia; Li, Dong; Xu, Jiakun; Wang, Fang; Wang, Jinghan] Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Key Lab Sustainable Dev Polar Fisheries,Minist Agr, Qingdao 266071, Peoples R China.;[Zhao, Sijia; Wang, Jinghan] Ocean Univ China, Coll Food Sci & Engn, Qingdao Marine Sci & Technol Ctr, Lab Marine Drugs & Bioprod, Qingdao 266003, Peoples R China.;[Shoji, Osami] Nagoya Univ, Grad Sch Sci, Dept Chem, Furo Cho,Chikusa Ku, Nagoya 4648602, Japan.;[Lin, Yingwu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, JK ] C;Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Key Lab Sustainable Dev Polar Fisheries,Minist Agr, Qingdao 266071, Peoples R China.
关键词：
Lignin;O-demethylation;P450BM3
摘要：
The enzymatic demethylation of aromatic compounds presents a major challenge in the valorization of lignin. The main goal was to develop an efficient artificial peroxygenase system combining engineered P450BM3 with AldO (sugar alcohol oxidase) and DFSM (dual function small molecule) for the regioselective O -demethylation of lignin-derived aromatic ethers. P450BM3 serves as a versatile biocatalyst, and its engineered variants demonstrate expanded substrate promiscuity toward non-native substrates. AldO, served as the H 2 O 2 in situ generation system. The DFSM, a rationally designed catalytic auxiliary, facilitates precise control of enzymatic reactions and enhances the efficiency of O -demethylation. We hypothesize that by combining P450BM3 with AldO and DFSM, we can better control the generation of H 2 O 2 and direct the enzymatic system toward efficient O -demethylation. The engineered P450BM3 F87A/V78A/T268D/A328F mutant achieved a TON of 1895 ± 4 for guaiacol, more than double that of the native P450BM3/H 2 O 2 system (TON = 872 ± 7). Moreover, the F87A/T268D mutant efficiently catalyzed double-demethylation of syringol, achieving the highest turnover number (TON) of 483 ± 7. This DFSM-assisted P450BM3/AldO system represents a significant advancement in the biocatalytic degradation of lignin and offers a cost-effective and scalable alternative to traditional NADPH-dependent P450 monooxygenases. Our findings open new pathways for sustainable biotechnological applications in lignin valorization and aromatic compound catabolism.
The enzymatic demethylation of aromatic compounds presents a major challenge in the valorization of lignin. The main goal was to develop an efficient artificial peroxygenase system combining engineered P450BM3 with AldO (sugar alcohol oxidase) and DFSM (dual function small molecule) for the regioselective O -demethylation of lignin-derived aromatic ethers. P450BM3 serves as a versatile biocatalyst, and its engineered variants demonstrate expanded substrate promiscuity toward non-native substrates. AldO, served as the H 2 O 2 in situ generation system. The DFSM, a rationally designed catalytic auxiliary, facilitates precise control of enzymatic reactions and enhances the efficiency of O -demethylation. We hypothesize that by combining P450BM3 with AldO and DFSM, we can better control the generation of H 2 O 2 and direct the enzymatic system toward efficient O -demethylation. The engineered P450BM3 F87A/V78A/T268D/A328F mutant achieved a TON of 1895 ± 4 for guaiacol, more than double that of the native P450BM3/H 2 O 2 system (TON = 872 ± 7). Moreover, the F87A/T268D mutant efficiently catalyzed double-demethylation of syringol, achieving the highest turnover number (TON) of 483 ± 7. This DFSM-assisted P450BM3/AldO system represents a significant advancement in the biocatalytic degradation of lignin and offers a cost-effective and scalable alternative to traditional NADPH-dependent P450 monooxygenases. Our findings open new pathways for sustainable biotechnological applications in lignin valorization and aromatic compound catabolism.
摘要：
Lightweight Al 2 O 3 –MgO refractory castables were prepared using microporous corundum–spinel aggregate, which was fabricated using the Kirkendall effect. The physical properties, microstructure, thermal conductivity, and slag resistance of the castables were analyzed using X-ray diffractometry (XRD), scanning electron microscopy (SEM), and thermodynamic calculations. A comparative analysis was carried out between these findings and the corresponding ones for dense aggregates of Al 2 O 3 –MgO castables. Compared with dense aggregates, the reaction between microporous aggregate and matrix results in a smaller pore size in lightweight aggregate castables. The less soluble spinel in the microporous aggregate contributes to the reduced solubility of lightweight castables in slag, thus enhancing their corrosion resistance. Porous aggregates could absorb more Fe 2+ /Mn 2+ ions from slag than dense aggregates, resulting in an increased viscosity of the slag. This, combined with the small pore size of the matrix, contributes to the superior penetration resistance of the lightweight aggregates castable compared with the dense aggregates castable. Consequently, lightweight aggregate castables exhibit superior corrosion and penetration resistance compared with dense aggregate castables. In contrast to dense aggregates castables, lightweight aggregates castables exhibit a 16.3% reduction in bulk density, an 8.2% decrease in thermal conductivity, and a notable enhancement in slag corrosion resistance.
