The Experts below are selected from a list of 7452 Experts worldwide ranked by ideXlab platform
Zhifang Chai - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic sulfonated 2 9 diamide 1 10 phenanthroline endowed with a highly effective ligand for separation of americium iii from europium iii extraction spectroscopy and density functional theory calculations
Inorganic Chemistry, 2021Co-Authors: Liyong Yuan, Peng Ren, Pinwen Huang, Xiaofan Yang, Yao Zou, Wuqing Tao, Suliang Yang, Yunhai Liu, Zhifang ChaiAbstract:The design and development of a water-soluble heterocyclic ligand are believed to be an alternative way for improving the separation efficiency of actinides from lanthanides. Herein, we designed and synthesized a novel hydrophilic multidentate ligand: disulfonated N,N'-diphenyl-2,9-diamide-1,10-phenanthroline (DS-Ph-DAPhen) with soft and hard donor atoms, as a masking agent in aqueous solutions for Am(III) separation. The combination of N,N,N',N'-tetraoctyldiglycolamide in kerosene and DS-Ph-DAPhen in aqueous phases could separate Am(III) from Eu(III) across a range of nitric acid concentrations with very high selectivity. The coordination behaviors of Eu(III) with DS-Ph-DAPhen in aqueous solutions were studied by UV-vis titration, electrospray ionization mass spectrometry, and Fourier transform infrared spectra. The results indicated that Eu(III) ions could form both 1:1 and 1:2 complexes with the DS-Ph-DAPhen ligand in aqueous solution. Density functional theory calculation suggests that there are more covalent characters for Am-N bonds than that for Eu-N bonds in the complexes, which supports the better selectivity of the DS-Ph-DAPhen ligand toward Am(III) over Eu(III). This work demonstrates a feasible alternative approach to separating trivalent actinides from lanthanides with high selectivity.
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large pore 3d cubic mesoporous kit 6 hybrid bearing a hard soft donor combined ligand for enhancing u vi capture an experimental and theoretical investigation
ACS Applied Materials & Interfaces, 2017Co-Authors: Liyong Yuan, Lin Zhu, Chengliang Xiao, Nan Zhang, Zhifang Chai, Weiqun ShiAbstract:A preorganized tetradentate phenanthrolineamide (DAPhen) ligand with hard and soft donors combined in the same molecule has been found to possess high extraction ability toward actinides over lanthanides from acidic aqueous solution in our previous work. Herein we grafted phenanthrolineamide groups onto a large-pore three-dimensional cubic silica support by the reaction of DAPhen siloxane with KIT-6 substrate to prepare a novel uranium-selective sorbent, KIT-6-DAPhen. The as-synthesized sorbent was well-characterized by scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption/desorption, X-ray diffraction, FT-IR, 13C cross-polarization magic-angle spinning NMR, and TGA techniques, which confirmed the consummation of the functionalization. Subsequently, the effects of contact time, solution pH, initial U(VI) concentration, and the presence of competing metal ions on the U(VI) sorption onto KIT-6-DAPhen sorbent were investigated in detail. It was found that KIT-6-DAPhen ...
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excellent selectivity for actinides with a tetradentate 2 9 diamide 1 10 phenanthroline ligand in highly acidic solution a hard soft donor combined strategy
Inorganic Chemistry, 2014Co-Authors: Chengliang Xiao, Liyong Yuan, Zhifang Chai, Congzhi Wang, Shuao Wang, Yuliang Zhao, Weiqun ShiAbstract:In this work, we reported a phenanthroline-based tetradentate ligand with hard-soft donors combined in the same molecule, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), for the group separation of actinides over lanthanides. The synthesis and solvent extraction as well as complexation behaviors of the ligand with actinides and lanthanides are studied experimentally and theoretically. The ligand exhibits excellent extraction ability and high selectivity toward hexavalent, tetravalent, and trivalent actinides over lanthanides in highly acidic solution. The chemical stoichiometry of Th(IV) and U(VI) complexes with Et-Tol-DAPhen is determined to be 1:1 using X-ray crystallography. The stability constants of some typical actinide and lanthanide complexes of Et-Tol-DAPhen are also determined in methanol by UV-vis spectrometry. Density functional theory (DFT) calculations reveal that the An-N bonds of the Et-Tol-DAPhen complexes have more covalent characters than the corresponding Eu-N bonds, which may in turn lead to the selectivity of Et-Tol-DAPhen toward actinides. This ligand possesses merits of both alkylamide and 219-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthroline (R-BTPhen) extractants for efficient actinide extraction and the selectivity toward minor actinides over lanthanides and hence renders huge potential opportunities in high-level liquid waste (HLLW) partitioning.
Weiqun Shi - One of the best experts on this subject based on the ideXlab platform.
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large pore 3d cubic mesoporous kit 6 hybrid bearing a hard soft donor combined ligand for enhancing u vi capture an experimental and theoretical investigation
ACS Applied Materials & Interfaces, 2017Co-Authors: Liyong Yuan, Lin Zhu, Chengliang Xiao, Nan Zhang, Zhifang Chai, Weiqun ShiAbstract:A preorganized tetradentate phenanthrolineamide (DAPhen) ligand with hard and soft donors combined in the same molecule has been found to possess high extraction ability toward actinides over lanthanides from acidic aqueous solution in our previous work. Herein we grafted phenanthrolineamide groups onto a large-pore three-dimensional cubic silica support by the reaction of DAPhen siloxane with KIT-6 substrate to prepare a novel uranium-selective sorbent, KIT-6-DAPhen. The as-synthesized sorbent was well-characterized by scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption/desorption, X-ray diffraction, FT-IR, 13C cross-polarization magic-angle spinning NMR, and TGA techniques, which confirmed the consummation of the functionalization. Subsequently, the effects of contact time, solution pH, initial U(VI) concentration, and the presence of competing metal ions on the U(VI) sorption onto KIT-6-DAPhen sorbent were investigated in detail. It was found that KIT-6-DAPhen ...
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excellent selectivity for actinides with a tetradentate 2 9 diamide 1 10 phenanthroline ligand in highly acidic solution a hard soft donor combined strategy
Inorganic Chemistry, 2014Co-Authors: Chengliang Xiao, Liyong Yuan, Zhifang Chai, Congzhi Wang, Shuao Wang, Yuliang Zhao, Weiqun ShiAbstract:In this work, we reported a phenanthroline-based tetradentate ligand with hard-soft donors combined in the same molecule, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), for the group separation of actinides over lanthanides. The synthesis and solvent extraction as well as complexation behaviors of the ligand with actinides and lanthanides are studied experimentally and theoretically. The ligand exhibits excellent extraction ability and high selectivity toward hexavalent, tetravalent, and trivalent actinides over lanthanides in highly acidic solution. The chemical stoichiometry of Th(IV) and U(VI) complexes with Et-Tol-DAPhen is determined to be 1:1 using X-ray crystallography. The stability constants of some typical actinide and lanthanide complexes of Et-Tol-DAPhen are also determined in methanol by UV-vis spectrometry. Density functional theory (DFT) calculations reveal that the An-N bonds of the Et-Tol-DAPhen complexes have more covalent characters than the corresponding Eu-N bonds, which may in turn lead to the selectivity of Et-Tol-DAPhen toward actinides. This ligand possesses merits of both alkylamide and 219-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthroline (R-BTPhen) extractants for efficient actinide extraction and the selectivity toward minor actinides over lanthanides and hence renders huge potential opportunities in high-level liquid waste (HLLW) partitioning.
Liyong Yuan - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic sulfonated 2 9 diamide 1 10 phenanthroline endowed with a highly effective ligand for separation of americium iii from europium iii extraction spectroscopy and density functional theory calculations
Inorganic Chemistry, 2021Co-Authors: Liyong Yuan, Peng Ren, Pinwen Huang, Xiaofan Yang, Yao Zou, Wuqing Tao, Suliang Yang, Yunhai Liu, Zhifang ChaiAbstract:The design and development of a water-soluble heterocyclic ligand are believed to be an alternative way for improving the separation efficiency of actinides from lanthanides. Herein, we designed and synthesized a novel hydrophilic multidentate ligand: disulfonated N,N'-diphenyl-2,9-diamide-1,10-phenanthroline (DS-Ph-DAPhen) with soft and hard donor atoms, as a masking agent in aqueous solutions for Am(III) separation. The combination of N,N,N',N'-tetraoctyldiglycolamide in kerosene and DS-Ph-DAPhen in aqueous phases could separate Am(III) from Eu(III) across a range of nitric acid concentrations with very high selectivity. The coordination behaviors of Eu(III) with DS-Ph-DAPhen in aqueous solutions were studied by UV-vis titration, electrospray ionization mass spectrometry, and Fourier transform infrared spectra. The results indicated that Eu(III) ions could form both 1:1 and 1:2 complexes with the DS-Ph-DAPhen ligand in aqueous solution. Density functional theory calculation suggests that there are more covalent characters for Am-N bonds than that for Eu-N bonds in the complexes, which supports the better selectivity of the DS-Ph-DAPhen ligand toward Am(III) over Eu(III). This work demonstrates a feasible alternative approach to separating trivalent actinides from lanthanides with high selectivity.
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large pore 3d cubic mesoporous kit 6 hybrid bearing a hard soft donor combined ligand for enhancing u vi capture an experimental and theoretical investigation
ACS Applied Materials & Interfaces, 2017Co-Authors: Liyong Yuan, Lin Zhu, Chengliang Xiao, Nan Zhang, Zhifang Chai, Weiqun ShiAbstract:A preorganized tetradentate phenanthrolineamide (DAPhen) ligand with hard and soft donors combined in the same molecule has been found to possess high extraction ability toward actinides over lanthanides from acidic aqueous solution in our previous work. Herein we grafted phenanthrolineamide groups onto a large-pore three-dimensional cubic silica support by the reaction of DAPhen siloxane with KIT-6 substrate to prepare a novel uranium-selective sorbent, KIT-6-DAPhen. The as-synthesized sorbent was well-characterized by scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption/desorption, X-ray diffraction, FT-IR, 13C cross-polarization magic-angle spinning NMR, and TGA techniques, which confirmed the consummation of the functionalization. Subsequently, the effects of contact time, solution pH, initial U(VI) concentration, and the presence of competing metal ions on the U(VI) sorption onto KIT-6-DAPhen sorbent were investigated in detail. It was found that KIT-6-DAPhen ...
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excellent selectivity for actinides with a tetradentate 2 9 diamide 1 10 phenanthroline ligand in highly acidic solution a hard soft donor combined strategy
Inorganic Chemistry, 2014Co-Authors: Chengliang Xiao, Liyong Yuan, Zhifang Chai, Congzhi Wang, Shuao Wang, Yuliang Zhao, Weiqun ShiAbstract:In this work, we reported a phenanthroline-based tetradentate ligand with hard-soft donors combined in the same molecule, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), for the group separation of actinides over lanthanides. The synthesis and solvent extraction as well as complexation behaviors of the ligand with actinides and lanthanides are studied experimentally and theoretically. The ligand exhibits excellent extraction ability and high selectivity toward hexavalent, tetravalent, and trivalent actinides over lanthanides in highly acidic solution. The chemical stoichiometry of Th(IV) and U(VI) complexes with Et-Tol-DAPhen is determined to be 1:1 using X-ray crystallography. The stability constants of some typical actinide and lanthanide complexes of Et-Tol-DAPhen are also determined in methanol by UV-vis spectrometry. Density functional theory (DFT) calculations reveal that the An-N bonds of the Et-Tol-DAPhen complexes have more covalent characters than the corresponding Eu-N bonds, which may in turn lead to the selectivity of Et-Tol-DAPhen toward actinides. This ligand possesses merits of both alkylamide and 219-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthroline (R-BTPhen) extractants for efficient actinide extraction and the selectivity toward minor actinides over lanthanides and hence renders huge potential opportunities in high-level liquid waste (HLLW) partitioning.
Chengliang Xiao - One of the best experts on this subject based on the ideXlab platform.
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large pore 3d cubic mesoporous kit 6 hybrid bearing a hard soft donor combined ligand for enhancing u vi capture an experimental and theoretical investigation
ACS Applied Materials & Interfaces, 2017Co-Authors: Liyong Yuan, Lin Zhu, Chengliang Xiao, Nan Zhang, Zhifang Chai, Weiqun ShiAbstract:A preorganized tetradentate phenanthrolineamide (DAPhen) ligand with hard and soft donors combined in the same molecule has been found to possess high extraction ability toward actinides over lanthanides from acidic aqueous solution in our previous work. Herein we grafted phenanthrolineamide groups onto a large-pore three-dimensional cubic silica support by the reaction of DAPhen siloxane with KIT-6 substrate to prepare a novel uranium-selective sorbent, KIT-6-DAPhen. The as-synthesized sorbent was well-characterized by scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption/desorption, X-ray diffraction, FT-IR, 13C cross-polarization magic-angle spinning NMR, and TGA techniques, which confirmed the consummation of the functionalization. Subsequently, the effects of contact time, solution pH, initial U(VI) concentration, and the presence of competing metal ions on the U(VI) sorption onto KIT-6-DAPhen sorbent were investigated in detail. It was found that KIT-6-DAPhen ...
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excellent selectivity for actinides with a tetradentate 2 9 diamide 1 10 phenanthroline ligand in highly acidic solution a hard soft donor combined strategy
Inorganic Chemistry, 2014Co-Authors: Chengliang Xiao, Liyong Yuan, Zhifang Chai, Congzhi Wang, Shuao Wang, Yuliang Zhao, Weiqun ShiAbstract:In this work, we reported a phenanthroline-based tetradentate ligand with hard-soft donors combined in the same molecule, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), for the group separation of actinides over lanthanides. The synthesis and solvent extraction as well as complexation behaviors of the ligand with actinides and lanthanides are studied experimentally and theoretically. The ligand exhibits excellent extraction ability and high selectivity toward hexavalent, tetravalent, and trivalent actinides over lanthanides in highly acidic solution. The chemical stoichiometry of Th(IV) and U(VI) complexes with Et-Tol-DAPhen is determined to be 1:1 using X-ray crystallography. The stability constants of some typical actinide and lanthanide complexes of Et-Tol-DAPhen are also determined in methanol by UV-vis spectrometry. Density functional theory (DFT) calculations reveal that the An-N bonds of the Et-Tol-DAPhen complexes have more covalent characters than the corresponding Eu-N bonds, which may in turn lead to the selectivity of Et-Tol-DAPhen toward actinides. This ligand possesses merits of both alkylamide and 219-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthroline (R-BTPhen) extractants for efficient actinide extraction and the selectivity toward minor actinides over lanthanides and hence renders huge potential opportunities in high-level liquid waste (HLLW) partitioning.
You Xing Zhao - One of the best experts on this subject based on the ideXlab platform.
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daphnauranins c e three new antifeedants from Daphne aurantiaca roots
Molecules, 2018Co-Authors: Sheng Zhuo Huang, Qing Yun, Qi Wang, Hao Fu Dai, Yu Qing Liu, Jun Zhou, You Xing ZhaoAbstract:Daphnauranins C⁻E (compounds 1⁻3), two sesquiterpenoids and one monoterpenoid were isolated from the roots of Daphne aurantiaca Diels. Daphnauranin C is a 9-O-13 etherified and hydroperoxy-substituted guaiane sesquiterpenoid, daphnauranin D is a guaiane sesquiterpenoid ketal, and daphnauranin E is a monoterpenoid lactone. Their structures were elucidated by comprehensive analyses of MS, 1D NMR, and 2D NMR spectroscopic data. In an anti-feeding activities test, daphnauranins C⁻E showed activity against male fruit fly with anti-feeding indexes (AI) up to 39.1, 39.2, and 27.8% respectively, at 1 mM.
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daphnauranins a and b two new antifeedants isolated from Daphne aurantiaca roots
Fitoterapia, 2017Co-Authors: Sheng Zhuo Huang, Qi Wang, Hao Fu Dai, Yu Qing Liu, Jun Zhou, Zhikai Guo, Fandong Kong, You Xing ZhaoAbstract:Daphnauranins A (1) and B (2), two sesquiterpenoids were isolated from the roots of Daphne aurantiaca Diels. One is an unprecedented 5/7 oxacycloheptane ring system, the other is a sesquiterpene-lignan complex. Their structures were elucidated by comprehensive spectroscopic methods including MS and NMR. Their absolute configurations were further confirmed by the quantum ECD calculations. Daphnauranins A and B showed anti-insect activities against male fruit fly with anti-feeding rate up to 46.2±7.1 and 44.7±5.4% at 1mM, respectively.
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anti hiv terpenoids from Daphne aurantiaca diels stems
ChemInform, 2016Co-Authors: Sheng Zhuo Huang, Qi Wang, Hao Fu Dai, Jun Zhou, Xuan Zhang, Yongtang Zheng, You Xing ZhaoAbstract:Thirteen new sesquiterpenoids, including six guaiane type auranticanols A–F (1, 2, and 4–7) and seven carotene type auranticanols G–M (18–24) were isolated from the stems of Daphne aurantiaca Diels., along with fourteen known sesquiterpenoids (3, 8–17, 25–27) and two known tigliane diterpenoids (28, 29), and their structures were elucidated by extensively analyzing their MS and NMR spectroscopic data. A bioassay of anti-HIV activity indicated that compounds 11, 14, 19, and 28 showed definite activities with EC50 values of 2.138, 0.286, 1.773 and 0.000282 μg mL−1 and SI > 93.545, 93.787, 10.243, and 65177.305, respectively.
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daphnauranols a c new antifeedant sesquiterpenoids with a 5 6 7 ring system from Daphne aurantiaca
ChemInform, 2014Co-Authors: Sheng Zhuo Huang, Hao Fu Dai, Yu Qing Liu, Jun Zhou, Xianghai Cai, You Xing ZhaoAbstract:Daphnauranols A-C (1-3), three new sesquiterpenoids with an unprecedented 5/6/7 ring system, were isolated from the stems of Daphne aurantiaca Diels. Their structures were elucidated on the basis of comprehensive spectroscopic methods including MS and NMR. The absolute configuration of daphnauranol A was further confirmed by single crystal X-ray diffraction (Cu K alpha). Their anti-feedant activity was tested, and the fruit fly antifeedant index (AI) were 39.8 +/- 7.2%, 29.4 +/- 7.2%, and 26.3 +/- 6.4%, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
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two new guaiane sesquiterpenoids from Daphne holosericea diels hamaya
Molecules, 2014Co-Authors: Yichun Chen, Sheng Zhuo Huang, Hao Fu Dai, Zhikai Guo, Yan Hua, You Xing ZhaoAbstract:Two new sesquiterpenoids with guaiane skeletons-holosericin A (1) and holosericin B (2)-were isolated from the medicinal plant Daphne holosericea (Diels) Hamawa (Thymelaeceae). Their structures were elucidated by 1D and 2D-NMR spectroscopy, as well as HR-ESI-MS data. Compounds 1 and 2 were evaluated for inhibitory activities against acetylcholinesterase and compound 2 showed a moderate activity with 31% inhibition.
