Synthesis of thiol-functionalized hydrotalcite and its application for adsorption of uranium (VI)
作者：
Xu, Yuanhe;Ke, Guojun;Yin, Jiang;Lei, Weirui;Yang, Pengfei*
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2019年319(3):791-803 ISSN：0236-5731
通讯作者：
Yang, Pengfei
作者机构：
[Yin, Jiang; Yang, Pengfei; Xu, Yuanhe; Ke, Guojun; Lei, Weirui] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yang, Pengfei] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Mg/Al-hydrotalcite;Thiol;Adsorption;Uranium (VI);Functionalize
摘要：
The thiol-functional hydrotalcite (Mg/Al-LDO-SH) composite materials were prepared and characterized by EDS, SEM, FT-IR and XRD. The variables influencing the adsorption capacity were investigated. Results show that 3-MPTMS got success in material surface modification. The best optimization condition for adsorption experiment was at time 150 min, pH 3.0, temperature 30 °C, initial uranium (VI) concentration 30 mg L −1 , adsorption dosage 10 mg with 99.06% of adsorption efficiency and 1545.32 mg g −1 of adsorption capacity. Kinetics data follow the pseudo-second-order model and equilibrium data fit the Freundlich isotherm model very well. Thermodynamic studies show that adsorption process is spontaneous and exothermic. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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A Phenylalanine Derivative Containing a 4-Pyridine Group Can Construct Both Single Crystals and a Selective Cu-Ag Bimetallohydrogel
作者：
Wei, Chuan-Wan;Wang, Xiao-Juan* ;Gao, Shu-Qin;Wen, Ge-Bo;Lin, Ying-Wu*
期刊：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY ,2019年2019(10):1349-1353 ISSN：1434-1948
通讯作者：
Wang, Xiao-Juan;Lin, Ying-Wu
作者机构：
[Wei, Chuan-Wan; Lin, Ying-Wu; Wang, Xiao-Juan; Wang, XJ] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Gao, Shu-Qin; Wen, Ge-Bo; Lin, Ying-Wu] Univ South China, Lab Prot Struct & Funct, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, XJ; Lin, YW; Lin, Ying-Wu] 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.
关键词：
Metallohydrogels;Bimetallogels;Multi-responsiveness;Copper;Silver;Gels
摘要：
Metallohydrogels are attractive biomaterials, whereas formation of a selective bimetallogel in aqueous solution has rarely been explored. In this study, we show that a phenylalanine derivative containing a 4-pyridine group can not only assemble to form single crystals with copper acetate, but also selectively generate a Cu-Ag bimetallohydrogel upon further addition of silver nitrate, which exhibits excellent multi-responsiveness. This study represents a novel example of a selective bimetallohydrogel in aqueous solution, which provides insights into the formation of a bimetallohydrogel and clues for future design of more functional biomaterials.
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英文
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The concept of dual roles design in clean organic preparation
作者：
Cao, Zhong;Zhu, Qin;Lin, Ying-Wu;He, Wei-Min*
期刊：
中国化学快报：英文版 ,2019年30(12):2132-2138 ISSN：1001-8417
通讯作者：
He, Wei-Min
作者机构：
[He, Wei-Min; Cao, Zhong; Zhu, Qin] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Zhu, Qin] Hunan Univ Sci & Technol, Dept Chem, Xiangtan 411201, Peoples R China.
通讯机构：
[He, Wei-Min] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
关键词：
Green chemistry;Dual role;Quinoline N-oxides;Alkynes;Water
摘要：
Herein we summarized some clean preparation examples to emphasize the concept of dual roles design (or named as "two birds one stone strategy") in green and sustainable chemistry. In those examples, the reactants and/or solvent play dual roles rendering a cleaner organic preparation process. Consequently, both the chemical waste and manufacturing cost could be reduced. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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英文
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层状双金属氢氧化物及复合材料对放射性元素铀的吸附及机理研究
作者：
Wang Ning;Pang Hongwei;Yu Shujun;Gu Pengcheng;Song Shuang;...
期刊：
化学学报 ,2019年77(2):143-152 ISSN：0567-7351
通讯作者：
Wang Hongqing;Wang Xiangke
作者机构：
[Wang Ning; Wang Hongqing] Univ South China, Sch Chem & Chem Engn, Hengyang 421000, Peoples R China.;[Pang Hongwei; Yu Shujun; Wang Xiangke; Wang Ning; Song Shuang; Gu Pengcheng] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.
通讯机构：
[Wang Hongqing] U;[Wang Xiangke] N;Univ South China, Sch Chem & Chem Engn, Hengyang 421000, Peoples R China.;North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.
关键词：
层状双金属氢氧化物;复合材料;铀;环境污染;吸附
摘要：
随着核工业的快速发展,大量放射性元素铀被排放到环境中,造成严重的环境污染并给人类健康带来重大危害.层状双金属氢氧化物(LDHs)因其具有比表面积大、离子交换能力强以及独特的纳米结构等优点,在铀酰离子的去除及环境水污染处理方面展现出巨大潜力.同时,将层状双金属氢氧化物进行改性可大大增加活性位点,进一步提高材料对放射性元素铀的吸附性能.详细介绍了层状双金属氢氧化物及复合材料的制备及改性方法,通过光谱分析技术阐述了层状双金属氢氧化物对环境中铀酰离子的吸附效果以及作用机理.最后,对层状双金属氢氧化物在治理水污染中的应用前景给出个人见解,以期为今后的环境治理工作的深入研究和实际应用提供参考依据.
语种：
中文
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Adsorption and Recovery of Amidoxime Modified Nano-Fe3O4-Aspergillus niger for U(VI) from Low Concentration Uranium Solution
作者：
Lu, Wei;Tang, Shuangyang;Li, Le* ;Cheng, Bin;Dai, Zhongran;...
期刊：
Nanoscience and Nanotechnology Letters ,2019年11(3):337-345 ISSN：1941-4900
通讯作者：
Li, Le
作者机构：
[Lu, Wei; Cheng, Bin; Liu, Ling; Chen, Tuo; Li, Le] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.;[Lu, Wei; Cheng, Bin; Liu, Ling; Chen, Tuo; Li, Le; Dai, Zhongran] Univ South China, Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.;[Lu, Wei; Liu, Ling; Chen, Tuo; Li, Le] Univ South China, Key Lab Hlth Hazard Factors Inspect & Quarantine, Hengyang 421001, Peoples R China.;[Tang, Shuangyang] Univ South China, Inst Pathogen Biol, Hengyang 421001, Peoples R China.;[Cao, Chen] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Le] U;Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.;Univ South China, Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.;Univ South China, Key Lab Hlth Hazard Factors Inspect & Quarantine, Hengyang 421001, Peoples R China.
关键词：
Amidoxime;Aspergillus niger;Nano-Fe3O4;Bioadsorptiont;Uranium
摘要：
The Aspergillus niger magnetic bioadsorbent ANFAN (amidoxime modified Nano-Fe3O4-Aspergillus niger, ANFAN) was prepared by amine oximation reaction with Aspergillus niger and nano-Fe3O4. The effects of initial pH value, adsorption time, adsorbent dosage, initial uranium concentration and coexisting ions on the adsorption of ANFAN for uranyl ion were studied in detail. The results showed that under the optimum adsorption conditions, the maximum adsorption efficiency of ANFAN for U(VI) solution amounted to 92.35%, and the maximum biosorption capacity could reach 23.38 mg/g. The kinetic data followed the pseudo-second-order model which indicated that the adsorption for uranium was mainly chemical activity on the surface of ANFAN. The adsorption equilibrium data fitted the Langmuir isotherm model well, which indicated that the adsorption of ANFAN for uranium was a single layer of chemical adsorption. Adsorption thermodynamics studies indicated that adsorption of ANFAN for uranium was a viable, spontaneous and endothermic process. The study provided a novel magnetic biosorbent with high adsorption capacity and a new method of adsorption for low concentrations of uranium.
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英文
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Preparation, uranium (VI) absorption and reuseability of marine fungus mycelium modified by the bis-amidoxime-based groups
作者：
He, Dianxiong;Tan, Ni* ;Luo, Xiaomei;Yang, Xuechun;Ji, Kang;...
期刊：
RADIOCHIMICA ACTA ,2019年108(1):37-49 ISSN：0033-8230
通讯作者：
Tan, Ni
作者机构：
[Yang, Xuechun; Han, Jingwen; Ji, Kang; Tan, Ni; Liu, Yaqing; He, Dianxiong; Luo, Xiaomei; Chen, Can] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Tan, Ni] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Bis-amidoxime group;Claw-like;biosorption;marine fungus;modification;uranium
摘要：
Bis-amidoxime-based claw-like-functionalized marine fungus material (ZZF51-GPTS-DCDA-AM) was prepared for study to absorb the low concentration uranium (VI) from aqueous solution. A series of characterization methods such as SEM, TGA and FT-IR were applied for the functionalized materials before and after modification and adsorption. The experimental results suggested that the amidoxime groups were successfully grafted onto the surface of mycelium powder and provided the special binding sites for the absorption of uranium (VI). In the absorption research, uranium (VI) initial concentration, pH and equilibrium time were optimized as 40 mg L -1 , 6.0, and 110 min by L 4 3 orthogonal experiment, respectively, and the maximum absorption capacity of the prepared material was 370.85 mg g -1 under the optimum batch conditions. After five cycling process, the desorption rate and regeneration efficiency of the modified mycelium were found to be 80.29 % and 94.51 %, respectively, which indicated that the material had an adequately high reusability property as a cleanup tool. The well known Langmuir and Freundlich isotherm adsorption model fitting found that the modified materials had both monolayer and bilayer adsorption to uranium (VI) ions. Simultaneously, the pseudo-second-order model was better to illustrated the adsorption kinetics process. The enhanced adsorption capacity of uranium (VI) by the modified fungus materials over raw biomass was mainly owing to the strong chelation of amidoxime groups and uranium (VI) ions. © 2019 Walter de Gruyter GmbH, Berlin/Boston.
语种：
英文
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Cytotoxic polyhydroxy serratene triterpenoids from Lycopodium complanatum.
作者：
Dong, Qiuzhu;Zou, Zhenxing;Jia, Xiaohui;Yu, Xia;Li, Jing;...
期刊：
Bioorganic Chemistry ,2019年87:373-379 ISSN：0045-2068
通讯作者：
Xu, Kangping
作者机构：
[Tan, Guishan; Dong, Qiuzhu; Zhou, Wenhao; Sun, Huihui; Wu, Wei; Li, Jing; Yu, Xia; Zou, Zhenxing; Xu, Kangping] Cent S Univ, Xiangya Sch Pharmaceut Sci, Changsha 410013, Hunan, Peoples R China.;[Tan, Guishan] Cent S Univ, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China.;[Jia, Xiaohui] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, Kangping] C;Cent S Univ, Xiangya Sch Pharmaceut Sci, Changsha 410013, Hunan, Peoples R China.
关键词：
Cytotoxic activities;Lycopodium complanatum;Polyhydroxy serratene triterpenoids
摘要：
Phytochemical investigation of the 70% aqueous EtOH extract of Lycopodium complanatum led to six new polyhydroxy serratene triterpenoids (serrat A-F, 1–6), along with a known analogue (7). Their structures and configurations were elucidated by data analysis of HRESIMS, 1D and 2D NMR, in combination with comparisons of reported experimental spectroscopic data. All the isolates were evaluated cytotoxic activities against HepG2 cells, MCF-7 cells and series human lung cancer cell lines A549, Calu-6, NCI-H441, NCI-H226 and NCI-H1975. The results indicated that certain compounds inhibited proliferation of human cancer cells. Moreover, all compounds possessed selective cytotoxic activities on MCF-7 cells. Further, possible biosynthesis pathways of these compounds were proposed. © 2019
语种：
英文
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Poly(cyclotriphosphazene-co-phloroglucinol)PCPP as a solid phase extractant for preconcentrative separation of uranium(VI) from aqueous solution
作者：
Liu, Mouwu;Wang, Yanfei* ;Ma, Zhili;Luo, Yige
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2019年319(1):279-288 ISSN：0236-5731
通讯作者：
Wang, Yanfei
作者机构：
[Liu, Mouwu; Wang, Yanfei; Luo, Yige; Ma, Zhili] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Wang, Yanfei] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Polyphosphazenes;PCPP microspheres;Uranium(VI);Solid phase extractant
摘要：
Poly(cyclotriphosphazene-co-phloroglucinol) (PCPP) microspheres, a new solid phase extraction for extracting uranium(VI), synthesized via one-pot precipitation copolymerization. The PCPP microspheres were characterized by FT-IR, SEM/EDS, zeta potential and N 2 adsorption/desorption isotherms. Through the extraction experiment to evaluate the extraction behavior of the PCPP microspheres for uranium(VI). The extractant can achieve the optimal effect under the conditions of contact time with 60 min, pH = 3.5, initial concentration 100 mg L −1 and extractant dosage 0.70 g L −1 . The extraction behavior obeyed with the pseudo second-order model and Langmuir isotherm model. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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Cooperative Capture of Uranyl Ions by a Carbonyl-Bearing Hierarchical-Porous Cu–Organic Framework
作者：
Wang, Xiao-Feng* ;Chen, Yangyang;Song, Li-Ping;Fang, Zhen;Zhang, Jian;...
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION ,2019年58(52):18808-18812 ISSN：1433-7851
通讯作者：
Wang, Xiao-Feng;Lin, Ying-Wu;Rocha, Joao;Zhang, Yue-Biao
作者机构：
[Wang, XF; Lin, Ying-Wu; Zhang, Jian; Chen, Yangyang; Song, Li-Ping; Sun, Yunkai; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, 28 Changsheng Xi Rd, Hengyang 421001, Hunan, Peoples R China.;[Wang, XF; Rocha, J; Rocha, Joao; Shi, Fanian; Wang, Xiao-Feng] Univ Aveiro, Dept Chem, CICECO, Aveiro Inst Mat, Santiago Campus, P-3810193 Aveiro, Portugal.;[Fang, Zhen] Anhui Normal Univ, Coll Chem & Mat Sci, 1 East Beijing Rd, Wuhu 241000, Anhui, Peoples R China.;[Zhang, Yue-Biao] ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai, Peoples R China.
通讯机构：
[Wang, XF; Lin, YW; Rocha, J] U;[Zhang, Yue-Biao] S;Univ South China, Sch Chem & Chem Engn, 28 Changsheng Xi Rd, Hengyang 421001, Hunan, Peoples R China.;Univ Aveiro, Dept Chem, CICECO, Aveiro Inst Mat, Santiago Campus, P-3810193 Aveiro, Portugal.;ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai, Peoples R China.
关键词：
adsorption mechanisms;metal-organic frameworks;porous materials;single-crystal structure;uranyl capture
摘要：
To efficiently capture the toxic uranyl ions (UO22+), a new hierarchical micro-macroporous metal–organic framework was prepared under template-free conditions, featuring interconnected multi-nanocages bearing carbonyl groups derived from a semi-rigid ligand. The material exhibits an unusually high UO22+ sorption capacity of 562 mg g−1, which occurs in an intriguing two-steps process, on the macropore-based crystal surface and in the inner nanocages. Notably, the latter is attributed to the cooperative interplay of the shrinkage of the host porous framework induced by uranyl accommodation and the free carbonyl coordination sites, as shown by both single-crystal X-ray diffraction and a red-shift of the infrared [O=UVI=O]2+ antisymmetric vibration band. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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英文
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Enhancement of protein stability by an additional disulfide bond designed in human neuroglobin
作者：
Liu, Hai-Xiao;Li, Lianzhi;Yang, Xin-Zhi;Wei, Chuan-Wan;Cheng, Hui-Min;...
期刊：
RSC Advances ,2019年9(8):4172-4179 ISSN：2046-2069
通讯作者：
Lin, Ying-Wu
作者机构：
[Wei, Chuan-Wan; Lin, Ying-Wu; Liu, Hai-Xiao; Cheng, Hui-Min] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Li, Lianzhi] Liaocheng Univ, Sch Chem & Chem Engn, Liaocheng 252059, Peoples R China.;[Gao, Shu-Qin; Wen, Ge-Bo; Yang, Xin-Zhi; Lin, Ying-Wu] Univ South China, Lab Prot Struct & Funct, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, Ying-Wu] 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：
Human neuroglobin (Ngb) forms an intramolecular disulfide bond between Cys46 and Cys55, with a third Cys120 near the protein surface, which is a promising protein model for heme protein design. In order to protect the free Cys120 and to enhance the protein stability, we herein developed a strategy by designing an additional disulfide bond between Cys120 and Cys15 via A15C mutation. The design was supported by molecular modeling, and the formation of Cys15-Cys120 disulfide bond was confirmed experimentally by ESI-MS analysis. Molecular modeling, UV-Vis and CD spectroscopy showed that the additional disulfide bond caused minimal structural alterations of Ngb. Meanwhile, the disulfide bond of Cys15-Cys120 was found to enhance both Gdn center dot HCl-induced unfolding stability (increased by similar to 0.64 M) and pH-induced unfolding stability (decreased by similar to 0.69 pH unit), as compared to those of WT Ngb with a single native disulfide bond of Cys46-Cys55. Moreover, the half denaturation temperature (T-m) of A15C Ngb was determined to be higher than 100 degrees C. In addition, the disulfide bond of Cys15-Cys120 has slight effects on protein function, such as an increase in the rate of O-2 release by similar to 1.4-fold. This study not only suggests a crucial role of the artificial disulfide in protein stabilization, but also lays the groundwork for further investigation of the structure and function of Ngb, as well as for the design of other functional heme proteins, based on the scaffold of A15C Ngb with an enhanced stability.
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英文
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Uranyl-Organic Coordination Compounds Incorporating Photoactive Vinylpyridine Moieties: Synthesis, Structural Characterization, and Light-Induced Fluorescence Attenuation
作者：
Wu, Si;Mei, Lei;Li, Fei-ze;An, Shu-wen;Hu, Kong-qiu;...
期刊：
INORGANIC CHEMISTRY ,2018年57(23):14772-14785 ISSN：0020-1669
通讯作者：
Shi, Wei-qun
作者机构：
[Wu, Si; Li, Fei-ze; Hu, Kong-qiu; Mei, Lei; An, Shu-wen; Chai, Zhi-fang; Shi, Wei-qun] Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.;[Wu, Si; Nie, Chang-ming] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Chai, Zhi-fang] Chinese Acad Sci, Ningbo Inst Ind Technol, Engn Lab Nucl Energy Mat, Ningbo 315201, Zhejiang, Peoples R China.
通讯机构：
[Shi, Wei-qun] C;Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
摘要：
The fluorescence of uranyl originated from electronic transitions (S 11 -S 00 and S 10 -S 0v , v = 0-4) of the ligand-to-metal charge transfer (LMCT) process is an intrinsic property of many uranyl coordination compounds. However, light-induced regulation on fluorescence features of uranyl hybrid materials through photoactive functional groups is less investigated. In this work, the photoactive vinyl group-containing ligands, (E)-methyl 3-(pyridin-4-yl)acrylate and (E)-methyl 3-(pyridin-3-yl)acrylate, have been used in the construction of uranyl coordination polymers in the presence of 1,10-phenanthroline (phen). Five compounds (UO 2 ) 3 (μ 3 -O)(μ 2 -OH) 2 (L 1 ) 2 (phen) 2 (1), (UO 2 ) 3 (μ 3 -O)(μ 2 -OH) 3 (L 1 )(phen) 2 (2), (UO 2 ) 3 (μ 3 -O)(μ 2 -OH) 3 (L 2 )(phen) 2 (3), [(UO 2 ) 2 (μ 2 -OH) 2 (L 2 ) 2 (phen) 2 ]·2H 2 O (4), and (UO 2 )Zn(SO 4 )(phen)(H 2 O)(OH) 2 (5) were obtained under hydrothermal conditions. Compounds 1-4 are polynuclear uranyl structures with abundant π-π interactions and hydrogen bonds contributed to the 3D crystal packing of them. As model compounds, 1 and 3 are selected for exploring photoresponsive behaviors. The emission intensities of these two compounds are found to decrease gradually over the exposure time of UV irradiation. X-ray single crystal structural analysis suggests that the fluorescence attenuation can be explained by the slight rotation of pyridinyl groups around the carbon-carbon double bond during UV irradiation, which is accompanied by the change of weak interactions, i.e., π-π interactions and hydrogen bonds in strength and density. This feature of light-induced fluorescence attenuation may enable these two compounds to act as potential photoresponsive sensor materials. © Copyright 2018 American Chemical Society.
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英文
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In-situ growth of hierarchical layered double hydroxide on polydopamine-encapsulated hollow Fe3O4 microspheres for efficientremoval and recovery of U(VI)
作者：
Yang, Dongxu;Wang, Xiangxue;Wang, Ning;Zhao, Guixia* ;Song, Gang;...
期刊：
Journal of Cleaner Production ,2018年172:2033-2044 ISSN：0959-6526
通讯作者：
Zhao, Guixia;Wang, Xiangke;Wang, Suhua;Wang, Hongqing
作者机构：
[Wang, Xiangke; Wen, Tao; Yang, Dongxu; Zhao, Guixia; Wang, Ning; Zhao, GX; Wang, XK; Wang, SH; Liang, Yu; Wang, Xiangxue; Wang, Suhua] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.;[Wang, Hongqing; Yang, Dongxu; Wang, Ning] Univ South China, Sch Chem & Chem Engn, 28 Changsheng West Rd, Hengyang 421001, Hunan, Peoples R China.;[Song, Gang; Chen, Diyun; Wang, Xiangxue] Guangdong Prov Key Lab Radionuclides Pollut Contr, Guangzhou 510006, Guangdong, Peoples R China.;[Hayat, Tasawar; Alsaedi, Ahmed; Wang, Suhua] King Abdulaziz Univ, NAAM Res Grp, Fac Sci, Jeddah 21589, Saudi Arabia.;[Wang, Xiangke] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Collaborat Innovat Ctr Radiat Med, Jiangsu Higher Educ Inst, Suzhou 215123, Peoples R China.
通讯机构：
[Zhao, GX; Wang, XK; Wang, SH] N;[Wang, Hongqing] U;North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.;Univ South China, Sch Chem & Chem Engn, 28 Changsheng West Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Uranium (VI);Ferroferric oxide (Fe3O4);Polydopamine;Layered double hydroxides;Removal and recovery
摘要：
With the increasing demand of nuclear power plant, the depleted uranium is inevitably emitted and causes environmental risk, hence it is crucial to develop new methods to efficiently eliminate uranium compounds from water. In this work, a bifunctional material core-shell-shell layered double hydroxide (LDH) decorated hollow magnetic polydopamine (MP) microspheres (defined as MPL) were synthesized and evaluated for the cleanup of uranium (VI) from aqueous solutions through specific adsorption. The experimental results showed that the adsorption was significantly affected by pH value rather than ionic strength, reflecting that the interaction was mainly governed by inner-sphere surface complexation owing to the multiple functional groups including imine, catechol, amine, and hydroxyl groups. The adsorption kinetics can be perfectly depicted by the pseudo-second-order model with high uptake percentage of 94.8%, which was superior to the previously reported materials. Interestingly, the maximum adsorption performance can be tuned by changing the thickness of polydopamine shell and the content of LDH, in the order of MP<inf>2</inf>L<inf>2</inf>(344 mg/g) >MP<inf>2</inf>L<inf>3</inf>(291 mg/g) >MP<inf>3</inf>L<inf>2</inf>(245 mg/g) >MP<inf>2</inf>L<inf>1</inf>(211 mg/g) >ML<inf>2</inf>(142 mg/g) >MP<inf>1</inf>L<inf>2</inf>(141 mg/g) >MP<inf>2</inf>(71 mg/g) >Fe<inf>3</inf>O<inf>4</inf>(34 mg/g) at 298.15 K and pH 5.0. The adsorption mechanism has been thoroughly investigated with techniques such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), thermo-gravimetric analyses (TGA), Fourier transformed infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). In summary, the bifunctional material could be applied as promising building block for the enrichment and recovery of uranium (VI) from aqueous solutions in environmental pollution cleanup.<br/> ©2017 Elsevier Ltd
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英文
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Formation of Cys-heme cross-link in K42C myoglobin under reductive conditions with molecular oxygen
作者：
Cheng, Hui-Min;Yuan, Hong;Wang, Xiao-Juan;Xu, Jia-Kun;Gao, Shu-Qin;...
期刊：
Journal of Inorganic Biochemistry ,2018年182:141-149 ISSN：0162-0134
通讯作者：
Lin, Ying-Wu
作者机构：
[Lin, Ying-Wu; Wang, Xiao-Juan; Cheng, Hui-Min] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Yuan, Hong; Tan, Xiangshi] Fudan Univ, Shanghai Key Lab Chem Biol Prot Res, Dept Chem, Shanghai 200433, Peoples R China.;[Yuan, Hong; Tan, Xiangshi] Fudan Univ, Inst Biomed Sci, Shanghai 200433, Peoples R China.;[Xu, Jia-Kun] Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China.;[Gao, Shu-Qin; Wen, Ge-Bo; Lin, Ying-Wu] Univ South China, Lab Prot Struct & Funct, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, Ying-Wu] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
*Cross-link;*Heme proteins;*Mechanism;*Protein design;*X-ray crystallography
摘要：
The structure and function of heme proteins are regulated by diverse post-translational modifications including heme-protein cross-links, with the underlying mechanisms not well understood. In this study, we introduced a Cys (K42C) close to the heme 4-vinyl group in sperm whale myoglobin (Mb) and solved its X-ray crystal structure. Interestingly, we found that K42C Mb can partially form a Cys-heme cross-link (termed K42C Mb-X) under dithiothreitol-induced reductive conditions in presence of O 2 , as suggested by guanidine hydrochloride-induced unfolding and heme extraction studies. Mass spectrometry (MS) studies, together with trypsin digestion studies, further indicated that a thioether bond is formed between Cys42 and the heme 4-vinyl group with an additional mass of 16 Da, likely due to hydroxylation of the α‑carbon. We then proposed a plausible mechanism for the formation of the novel Cys-heme cross-link based on MS, kinetic UV–vis and electron paramagnetic resonance (EPR) studies. Moreover, the Cys-heme cross-link was shown to fine-tune the protein reactivity toward activation of H 2 O 2 . This study provides valuable insights into the post-translational modification of heme proteins, and also suggests that the Cys-heme cross-link can be induced to form in vitro, making it useful for design of new heme proteins with a non-dissociable heme and improved functions. © 2018 Elsevier Inc.
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英文
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Highly efficient Pb(ii) and Cu(ii) removal using hollow Fe3O4@PDA nanoparticles with excellent application capability and reusability
作者：
Wang, Ning;Yang, Dongxu;Wang, Xiangxue;Yu, Shujun;Wang, Hongqing* ;...
期刊：
无机化学前沿 ,2018年5(9):2174-2182 ISSN：2052-1553
通讯作者：
Wang, Hongqing;Wang, Xiangke
作者机构：
[Wang, Hongqing; Yang, Dongxu; Wang, Ning] Univ South China, Sch Chem & Chem Engn, 28 Changsheng West Rd, Hengyang 421001, Hunan, Peoples R China.;[Wang, Xiangke; Wen, Tao; Yang, Dongxu; Wang, Xiangxue; Wang, Ning; Yu, Shujun] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.;[Wang, Xiangxue; Song, Gang] Guangzhou Univ, Guangdong Prov Key Lab Radionuclides Pollut Contr, Guangzhou 510006, Guangdong, Peoples R China.;[Wang, Xiangke; Yu, Zhimin] Hefei Univ, Dept Biol & Environm Engn, Hefei 230000, Anhui, Peoples R China.
通讯机构：
[Wang, Hongqing] U;[Wang, Xiangke] N;[Wang, Xiangke] H;Univ South China, Sch Chem & Chem Engn, 28 Changsheng West Rd, Hengyang 421001, Hunan, Peoples R China.;North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.
摘要：
Potentially toxic metals in sewage and industrial effluents pose a serious threat to human health and the environment. Herein, core-shell hollow magnetic polydopamine nanoparticles (denoted as Fe 3 O 4 @PDA) were fabricated via a simple one-pot synthesis method and applied for the elimination of Pb(ii) and Cu(ii) from wastewater. The versatile polydopamine (PDA) layer with abundant functional groups (amine, imine and catechol groups) provided favourable sites to bind metal ions. The experimental results showed that the adsorption processes were significantly affected by the pH values of the suspension. The ionic strength-independent adsorption processes indicated the existence of inner-sphere surface complexes of Pb(ii) and Cu(ii) on Fe 3 O 4 @PDA. The results showed that Fe 3 O 4 @PDA exhibited fast removal kinetics for Pb(ii) and Cu(ii), which achieved equilibrium within 3 h. The adsorption processes were well fitted by the pseudo-second-order kinetic model and Langmuir isotherm model. Furthermore, the removal capacities of Fe 3 O 4 @PDA were calculated to be 57.25 mg g -1 for Pb(ii) and 86.35 mg g -1 for Cu(ii), which were much higher than those of pure Fe 3 O 4 and other materials. Most importantly, the adsorption efficiencies of Pb(ii) and Cu(ii) on Fe 3 O 4 @PDA were still ∼71% and ∼70% after five cycles, respectively. In summary, the hollow Fe 3 O 4 @PDA nanoparticles can be used as outstanding materials for the elimination of Pb(ii) and Cu(ii), which is beneficial to reduce the toxic effects of heavy metal ion contaminated water. © the Partner Organisations.
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Theoretical investigation into the coordination of R-/S-asymmetric uranyl–salophens containing six-membered ring lactam with cis−/trans-cyclohexylamines
作者：
Yang, Liang-Liang;Kong, Xiang-He;Wu, Zhi-Lin;Lin, Ying-Wu;Liao, Li-Fu;...
期刊：
Applied Organometallic Chemistry ,2018年32(7):e4387- ISSN：0268-2605
通讯作者：
Nie, Chang-Ming
作者机构：
[Liao, Li-Fu; Nie, Chang-Ming; Wu, Zhi-Lin; Yang, Liang-Liang; Kong, Xiang-He; Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Nie, Chang-Ming] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
coordination selectivity;density functional theory;molecular recognition;R-/S-asymmetric uranyl–salophens
摘要：
A six-membered ring lactam derivative was introduced in a parallel manner into uranyl–salophens with R/S configuration (R-/S-AUSRLs), which were used as receptors to coordinate with guests of cis−/trans-methylcyclohexylamines (cis−/trans-MCHAs). Using density functional theory calculations at the B3LYP/6-311G** level and RECP, an insight into the coordination complexes of the R-/S-AUSRLs with cis−/trans-MCHAs was obtained. The results showed that the U atoms of receptors could coordinate with the N atoms of four kinds of cis−/trans-1,2 or − 1,4 guests, but the two kinds of cis−/trans-1,3 guests could not be converged by the same method in the process of structural optimization due to steric hindrance, and thus the cis−/trans-1,3 guests could not be coordinated with the R-/S-AUSRLs. The mode of coordination of the R-/S-AUSRLs with the guests displayed a significant difference. And the change of R-AUSRL coordination ability to the cis−/trans-MCHAs was very large, but that of S-AUSRL was small. Overall, the stability of the R-series coordination complexes was higher than that of the corresponding S-series coordination complexes, and the R-AUSRL receptor had better coordination selectivity and higher molecular recognition to the cis−/trans-MCHA guests than the S-AUSRL receptor. However, the coordination ability of S-AUSRL with the cis−/trans-MCHAs was stronger than that of R-AUSRL. It was expected that these results could provide insightful information and theoretical guidance for understanding the molecular recognition of R-/S-AUSRLs for cis−/trans-type cyclohexylamine derivatives.<br/> Copyright ©2018 John Wiley & Sons, Ltd.
语种：
英文
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Selective recognition and preliminary separation of hepatoprotective component silybin from milk thistle seeds by the prepared core-shell magnetic molecularly imprinted polymer
作者：
Gao, Yang;Tan, Ni* ;Wang, Juan;He, Dianxiong;Ji, Kang;...
期刊：
Journal of Polymer Research ,2018年25(7):1-14 ISSN：1022-9760
通讯作者：
Tan, Ni
作者机构：
[Han, Jingwen; Ji, Kang; Tan, Ni; He, Dianxiong; Gao, Yang; Yan, Xueming; Wang, Juan] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Tan, Ni] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Silybin;Magnetic molecularly imprinted polymer;Computer simulation;Selectivity recognition;Reverse atom transfer radical precipitation polymerization
摘要：
Using hepatoprotective component silybin as the template, MAA as the functional monomer, EGDMA as the cross linker, acetonitrile as the solvent, and Fe3O4 as the magnetic substrate, the silybin magnetic molecularly imprinted polymer(S-MIP) was successfully prepared by the reverse atom transfer radical precipitation polymerization(RATRP), and non-ion imprinted polymer(NIP) was also synthesized by the same procedure only in the absence of silybin. On the basis of computer simulation and L9(34) orthogonal array design matrix, the optimal preparation conditions were finally obtained as follows that the molar ratio of silybin, MAA, and EGDMA was 1:5:60. The prepared materials were respectively characterized by SEM, XRD, FT-IR, VSM and TGA, and the kinetic analyses explored that the adsorption process of S-MIP was better describled by the pseudo-second order kinetic equation, meanwhile, scatchard analysis illustrated that the heterogeneous binding sites existed in S-MIP. Both the selectivity factor α (2.232) and the relative selectivity factor β (2.201) of S-MIP showed the aim material had the excellent specific recognition capacity and selection adsorption property to silybin. Additionally, the recycling reuse experiments explored S-MIP was of a good stability and could be used repeatedly at least five times with only 15.8% decrease of adsorption capacity when applied in the fifth experiment, and the evaluation experiments by HPLC for silybin extraction from the medicinal herb milk thistle seeds indicated that S-MIP had the potential application in separating the natural hepatoprotective component silybin from the herbal plants.
语种：
英文
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Active sites of copper-complex catalytic materials for electrochemical carbon dioxide reduction
作者：
Weng, Zhe;Wu, Yueshen;Wang, Maoyu;Jiang, Jianbing;Yang, Ke;...
期刊：
Nature Communications ,2018年9(1):415 ISSN：2041-1723
通讯作者：
Liang, Yongye;Wang, Hailiang;Feng, Zhenxing
作者机构：
[Liang, Yongye; Weng, Zhe] South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Wang, Hailiang; Jiang, Jianbing; Brudvig, Gary W.; Huo, Shengjuan; Yang, Ke; Batista, Victor S.; Weng, Zhe; Wu, Yueshen] Yale Univ, Dept Chem, 225 Prospect St, New Haven, CT 06511 USA.;[Wang, Hailiang; Jiang, Jianbing; Brudvig, Gary W.; Huo, Shengjuan; Yang, Ke; Batista, Victor S.; Weng, Zhe; Wu, Yueshen] Yale Univ, Energy Sci Inst, West Haven, CT 06516 USA.;[Feng, Zhenxing; Wang, Maoyu] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA.;[Huo, Shengjuan] Shanghai Univ, Sci Coll, Dept Chem, Shanghai 200444, Peoples R China.
通讯机构：
[Liang, Yongye] S;[Wang, Hailiang] Y;[Feng, Zhenxing] O;South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Yale Univ, Dept Chem, 225 Prospect St, New Haven, CT 06511 USA.
摘要：
Restructuring-induced catalytic activity is an intriguing phenomenon of fundamental importance to rational design of high-performance catalyst materials. We study three coppercomplex materials for electrocatalytic carbon dioxide reduction. Among them, the copper(II) phthalocyanine exhibits by far the highest activity for yielding methane with a Faradaic efficiency of 66% and a partial current density of 13 mA cm2 at the potential of - 1.06 V versus the reversible hydrogen electrode. Utilizing in-situ and operando X-ray absorption spectroscopy, we find that under the working conditions copper(II) phthalocyanine undergoes reversible structural and oxidation state changes to form 2 nm metallic copper clusters, which catalyzes the carbon dioxide-To-methane conversion. Density functional calculations rationalize the restructuring behavior and attribute the reversibility to the strong divalent metal ion-ligand coordination in the copper(II) phthalocyanine molecular structure and the small size of the generated copper clusters under the reaction conditions. © The Author(s) 2018.
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英文
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The mpn668 gene of Mycoplasma pneumoniae encodes a novel organic hydroperoxide resistance protein
作者：
Chen, Lie-Song;Li, Chun;You, Xiao-Xing;Lin, Ying-Wu;Wu, Yi-Mou*
期刊：
International Journal of Medical Microbiology ,2018年308(7):776-783 ISSN：1438-4221
通讯作者：
Wu, Yi-Mou
作者机构：
[You, Xiao-Xing; Wu, Yi-Mou; Chen, Lie-Song] Hunan Prov Cooperat Innovat Ctr Mol Target New Dr, Inst Pathogen Biol, Med Coll, Hunan Prov Key Lab Special Pathogens Prevent & Co, Hengyang 421001, Hunan, Peoples R China.;[Li, Chun] Univ South China, Hosp 2, Clin Lab, Hengyang 421001, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Wu, Yi-Mou] H;Hunan Prov Cooperat Innovat Ctr Mol Target New Dr, Inst Pathogen Biol, Med Coll, Hunan Prov Key Lab Special Pathogens Prevent & Co, Hengyang 421001, Hunan, Peoples R China.
关键词：
Active site;Homology modeling;Organic hydroperoxide reductase;mpn668;qRT-PCR
摘要：
Mycoplasma pneumoniae (M. pneumoniae), as an obligate parasite, has evolved a protective strategy for coping with oxidative challenges caused by M. pneumoniae itself as well as the host immune system. However, to date, few antioxidant enzymes have been identified in mycoplasmas. In this report, we identified a protein encoded by the mpn668 gene from M. pneumoniae with a putative function as an organic hydroperoxide reductase (Ohr). The results indicated that the recombinant 140 amino acid protein, designated rMPN668, displayed hydroperoxidase activity towards both organic (tert-butyl hydroperoxide) and inorganic (hydrogen peroxide) hydroperoxides in the presence of a reducing agent such as dithiothreitol. Moreover, the expression of mpn668 in M. pneumoniae is upregulated in response to oxidative stress. Additionally, homology modeling of MPN668 and a molecular dynamics simulation suggest that both Cys55 and Cys119 form part of the active site of the protein. Mutants in which Cys55 or Cys119 were replaced with a serine lack antioxidant activity, indicating that MPN668 is a Cys-based peroxidase, consistent with it representing a new member of the Ohr family. © 2018
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英文
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Preparation of 4-sulfonylcalix[6]arene modified Fe3O4 as adsorbent for adsorption of U(VI) from aqueous solution
作者：
Liao, Qi;Li, Le* ;Yuan, Yali* ;Cheng, Bin;Lu, Wei;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2018年315(2):251-261 ISSN：0236-5731
通讯作者：
Li, Le;Yuan, Yali
作者机构：
[Cheng, Bin; Lu, Wei; Li, Le; Liao, Qi] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Hou, Shaoyan; Yuan, Yali; Liao, Qi] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Cheng, Bin; Lu, Wei; Li, Le] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Le; Yuan, Yali] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
关键词：
4-Sulfonylcalix[6]arene;Fe3O4;Co-precipitation;Adsorption;Uranium
摘要：
The 4-sulfonylcalix[6]arene modified Fe 3 O 4 (MFS) was characterized by FT-IR, SEM, VSM, TGA, etc., which showed that its saturation magnetization was 64.99 emu g −1 with the particle size 10–40 nm. The maximum adsorption efficiency by MFS for 2.5 mg L −1 U(VI) solution amounted to 94.39%, which was higher than that by Fe 3 O 4 (65.22%) under its optimum adsorption conditions. The adsorption of MFS and Fe 3 O 4 were both followed the pseudo-second order model and the Langmuir isotherm model. The Gibbs free energy change and enthalpy change revealed that the adsorption of U(VI) by MFS was a spontaneous and endothermic process. © 2017, Akadémiai Kiadó, Budapest, Hungary.
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英文
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Computational insight into asymmetric uranyl-salophen coordinated with α, β-unsaturated aldehydes and ketones
作者：
Lan, Wen-Bo;Wang, Xiao-Feng* ;He, Li-Ping;Meng, Yan-Bin;Li, Jun;...
期刊：
Applied Organometallic Chemistry ,2018年32(3):e4137- ISSN：0268-2605
通讯作者：
Wang, Xiao-Feng;Nie, Chang-Ming
作者机构：
[Li, Jun; Lan, Wen-Bo; Meng, Yan-Bin; He, Li-Ping; Wang, Xiao-Feng] Xiangnan Univ, Sch Publ Hlth, Chenzhou 423000, Hunan, Peoples R China.;[Nie, Chang-Ming; Lan, Wen-Bo] Univ South China, Sch Chem & Chem Engn, Hengyang, Peoples R China.;[Qiu, Bin] Chenzhou City Ctr Dis Control & Prevent, Chenzhou 423000, Hunan, Peoples R China.
通讯机构：
[Wang, Xiao-Feng] X;[Nie, Chang-Ming] U;Xiangnan Univ, Sch Publ Hlth, Chenzhou 423000, Hunan, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang, Peoples R China.
关键词：
alpha,beta-unsaturated aldehydes and ketones;asymmetric uranyl-salophen;coordination
摘要：
The study of the catalytic activity and activation mechanism of asymmetric uranyl-salophens with α, β-unsaturated aldehydes or α, β-unsaturated ketones, is a research hotspot. In this paper, the complexes of the uranyl–salophen(U-S) modified by unilateral benzene, coordinated with cyclohexenone, cyclopentenone and acrolein, were investigated using density functional theory calculations at the level of B3LYP/6-311G(d, p) basis set. The results showed that the uranyl-salophen(U-S) weakened the large π bond between C=C and C=O of the α, β-unsaturated aldehydes and ketones, making the unsaturated aldehydes and ketones activated. In addition, the molecular-recognition selectivity of the asymmetrical uranyl-salophen for cyclohexenone and cyclopentenone were much higher than for acrolein. Copyright © 2017 John Wiley & Sons, Ltd.
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