作者机构：
[Luo, Juan; Nie, Changming] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Lan, Jianhui; Wang, Congzhi; Chai, Zhifang; Zhao, Yuliang; Shi, Weiqun; Wu, Qunyan; Luo, Juan] Chinese Acad Sci, Lab Nucl Energy Chem, Inst High Energy Phys, Beijing 100049, Peoples R China.;[Lan, Jianhui; Wang, Congzhi; Chai, Zhifang; Zhao, Yuliang; Shi, Weiqun; Wu, Qunyan; Luo, Juan] Chinese Acad Sci, Key Lab Biomed Effects Nanomat & Nanosafety, Inst High Energy Phys, Beijing 100049, Peoples R China.;[Chai, Zhifang] Soochow Univ, Sch Radiol & Interdisciplinary Sci RAD X, Suzhou 215123, Peoples R China.;[Chai, Zhifang] Soochow Univ, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China.
通讯机构：
[Nie, Changming] U;[Shi, Weiqun] C;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Chinese Acad Sci, Lab Nucl Energy Chem, Inst High Energy Phys, Beijing 100049, Peoples R China.;Chinese Acad Sci, Key Lab Biomed Effects Nanomat & Nanosafety, Inst High Energy Phys, Beijing 100049, Peoples R China.
关键词：
density functional theory;di-(2-ethylhexyl) phosphoric acid;actinide;lanthanide;solvent extraction
摘要：
Separation of trivalent lanthanides (Ln(III)) and actinides (An(III)) is a key issue in the advanced spent nuclear fuel reprocessing. In the well-known trivalent actinide lanthanide separation by phosphorus reagent extraction from aqueous komplexes (TALSPEAK) process, the organophosphorus ligand HDEHP (di-(2-ethylhexyl) phosphoric acid) has been used as an efficient reagent for the partitioning of Ln(III) from An(III) with the combination of a holdback reagent in aqueous lactate buffer solution. In this work, the structural and electronic properties of Eu~(3+) and Am~(3+) complexes with HDEHP in nitric acid solution have been systematically explored by using scalar-relativistic density functional theory (DFT). It was found that HDEHP can coordinate with M(III) (M=Eu, Am) cations in the form of hydrogen-bonded dimers HL_2~- (L=DEHP), and the metal ions prefer to coordinate with the phosphoryl oxygen atom of the ligand. For all the extraction complexes, the metal-ligand bonds are mainly ionic in nature. Although Eu(III) complexes have higher interaction energies, the HL_2~- dimer shows comparable affinity for Eu(III) and Am(III) according to thermodynamic analysis, which may be attributed to the higher stabilities of Eu(III) nonahydrate. It is expected that this work could provide insightful information on the complexation of An(III) and Ln(III) with HDEHP at the molecular level.
摘要：
Functionalized magnetic Fe_3O_4@SiO_2 composite nanoparticles were prepared by simply embedding iron oxide nanoparticles into MCM-41 through one-step synthesis process, followed by aminopropyls grafting on the mesopore channels, aiming to efficiently and conveniently uptake U(VI) from aqueous solution. The resultant material possesses highly ordered mesoporous structure with large surface area, uniform pore size, excellent thermal stability, quick magnetic response, and desirable acids resistance, confirmed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), N_2 adsorption/ desorption experiments, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). Detailed U(VI) sorption test indicated that this material is indeed an effective U(VI) sorbent with fast sorption kinetics of less than 2 h, large sorption capacity of 160 mg/g at pH 5.0±0.1, and desirable selectivity towards U(VI) ions over a range of competing metal ions. The absorbed U(VI) can be easily desorbed by 0.01 mol/L or more concentrated HNO3 solution, and the reclaimed sorbent can be reused with no obvious decrease of sorption capacity even after 4 sorption-desorption cycles. The present results suggest the vast opportunities of this kind of magnetic composite on the solid-phase extraction of U(VI).
摘要：
A novel rhodamine-based dual probe Rh-2 for trivalent ferric ions (Fe3+) was successfully designed and synthesized, which exhibited a highly sensitive and selective recognition towards Fe3+ with an enhanced fluorescence emission in methanol-water media (v/v = 7/3, pH = 72). The probe Rh-2 could be applied to the determination of Fe3+ with a linear range covering from 3.0 x 10(-7) to 1.4 x 10(-5) M and a detection limit of 1.24 x 10(-8) M. Meanwhile, the binding ratio of Rh-2 and Fe3+ was found to be 1:1. Most importantly, the fluorescence and color signal changes of the Rh-2 solution were specific to Fe3+ over other commonly coexistent metal ions. Moreover, the probe Rh-2 has been used to image Fe3+ in living cells with satisfying results. (C) 2016 Elsevier B.V. All rights reserved.
作者机构：
[李广] School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China;[谢珍妮; 袁小兰; 李瑞瑞; 夏良树] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
期刊：
JOURNAL OF ORGANIC CHEMISTRY,2016年81(24):12084-12090 ISSN：0022-3263
通讯作者：
Lin, Jin-Hong;Xiao, Ji-Chang
作者机构：
[Zeng, Xian-Liang; Deng, Zuyong; Lin, Jin-Hong; Xiao, Ji-Chang; Lin, JH; Liu, Can] Chinese Acad Sci, Univ Chinese Acad Sci, Shanghai Inst Organ Chmistry, Key Lab Organofluorine Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China.;[Liu, Can] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, JH; Xiao, JC] C;Chinese Acad Sci, Univ Chinese Acad Sci, Shanghai Inst Organ Chmistry, Key Lab Organofluorine Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China.
摘要：
The fluorinated phosphonium salt (Ph3P+CF2CH3 BF4–) was shown to act as a nucleophilic 1,1-difluoroethylation agent to enable difluoroethylation of aldehydes and imines.
作者机构：
[肖方竹; 何淑雅; 唐艳] Support Discipline Laboratory of National Defence for Biochemistry and Molecular biology, University of South China, Hengyang, 421001, China;[戴益民] The Key Laboratory of Powder and Transport Materials Protection in Hunan Province, College of Chemistry and Chemical Engineering, Changsha University of Science &, Technology, Changsha, 410004, China;[彭国文] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[彭国文] School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China
通讯机构：
School of Chemistry and Chemical Engineering, University of South China, Hengyang, China
作者机构：
[Zhao, Yubao; Qiu, Liang; Li, Hui; Fan, Zao; Zhai, Wei] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Hoffmann, Michael R.; Zhao, Yubao] CALTECH, Linde Robinson Lab, Pasadena, CA 91125 USA.
通讯机构：
[Zhao, Yubao] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
摘要：
BiOBr samples with different facets were prepared and used for photocatalytic reduction of hexavalent chromium under visible light. The results reveal that BiOBr dominated with {110} facets giving a specific rate constant 3 times as high as BiOBr with {001} facets, and its much stronger internal electric field was believed to be the main reason.
摘要：
A new Schiff base fluorescence probe, 3-Allylsalicylaldehyde salicyl-hydrazone (L), for Mg2+ was designed and synthesized. The fluorescence of the sensor L was enhanced remarkably by Mg2+ with 2: 1 binding ratio, and the binding constant was determined to be 1.02 x 10(7) M-1. Probe L had high sensitivity for Mg2+ in a solution of DMF/water (4: 1, v/v, pH 7.5), and the detection limit was 4.88 x 10(-8) mol/L. Common coexistent metal ions, such as K+, Na+, Ag+, Ca2+, Zn2+, Ba2+, Bi2+, Cu2+, Ni2+, Hg2+, Fe3+, and Al3+, showed little or no interference on the detection of Mg2+ in solution. The fluorescence probe L, which was successfully used for the determination of trace Mg(II) in real samples, was shown to be promising for liquid-phase extraction coupled with fluorescence spectra.
摘要：
To solve the problems of heterogeneity and disorder in the cross-domain integration processes for offsite nuclear emergency response, the integrated decision-making framework of the CDIRS spaces based on Space Mapping and Semantic Web is proposed. Under this framework, the method of feature mapping and space modeling, interoperable mediating and interoperability verifying, ordered integrating and reasoning, which are key steps of the CDIRS method, are presented. Furthermore, with a fictive nuclear accident scenario, the relevant CDIRS spaces and ordering rules are constructed, and then the appropriate cross-domain integrated response solution is obtained and verified effectively by reasoning and simulating in the CDIRS model. With the CDIRS method proposed in this paper, the heterogeneity and disorder can be avoided, and the targets and constraints of the offsite nuclear emergency response problems in the original space can be transformed into the target space, being processed unified by formal modeling and ordered reasoning. (C) 2016 Elsevier Ltd. All rights reserved.
作者机构：
[Wu, Huiqiong; Shen, Rujuan; He, Ting; Zhang, Zhenzhu; Zhang, Yi; Wang, Xiaojuan; Zhang, Rui; Yang, Lan; Xiang, Juan] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Wei, Chuanwan; Wang, Xiaojuan] Univ South China, Coll Chem & Chem Engn, Hengyang 421000, Peoples R China.;[Shen, Rujuan] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Zhang, Yi] C;[Wei, Chuanwan] U;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;Univ South China, Coll Chem & Chem Engn, Hengyang 421000, Peoples R China.
摘要：
Correction for 'A Co(2+)-selective and chirality-sensitive supermolecular metallohydrogel with a nanofiber network skeleton' by Xiaojuan Wang et al., Nanoscale, 2016, DOI: 10.1039/c6nr00822d.
摘要：
With the fast development of nanoscience and nanotechnology, the nanomaterials have attracted multidisciplinary interests. The high specific surface area and large numbers of oxygen-containing functional groups of graphene oxides (GOs) make them suitable in the preconcentration and solidification of radionuclides from wastewater. In this paper, mainly based on the recent work carried out in our laboratory, the efficient elimination of radionuclides using GOs and GO-based nanomaterials as adsorbents are summarized and the interaction mechanisms are discussed from the results of batch techniques, surface complexation modeling, spectroscopic analysis and theoretical calculations. This review is helpful for the understanding of the interactions of radionuclides with GOs and GO-based nanomaterials, which is also crucial for the application of GOs and GO-based nanomaterials in environmental radionuclide pollution management and also helpful in nuclear waste management.
