The Cu(Ⅱ) separation behaviors with polymer inclusion membranes(PIMs) are explored by modifying 2-aminomethylpyridine derivatives with hydrophobic alkyl chains, including 2-[N-(tert-butyloxycarbonylmethyl)-2-picolyam...The Cu(Ⅱ) separation behaviors with polymer inclusion membranes(PIMs) are explored by modifying 2-aminomethylpyridine derivatives with hydrophobic alkyl chains, including 2-[N-(tert-butyloxycarbonylmethyl)-2-picolyamino]acetate(AMB), N,N-dioctyl-2-aminomethylpyridine(AMD), tert-butyl 2-(N-octyl-2-picolyamino) acetate(AMC), and N,N-didecyl-2-aminomethylpyridine(AME). The transport flux and selectivity of Cu(Ⅱ) are determined by optimizing composition and structure of carriers and plasticizers. The results show that the hydrophobic modification of 2-aminomethylpyridine derivatives can boost the selective transport of copper ions in PIMs and membrane stability. In the optimum composition of 30 wt.% PVC, 30 wt.% AME, and 40 wt.% NPOE, the initial flux of Cu(Ⅱ) is 5.8×10^(−6) mol·m^(−2)·s^(−1). The FT-IR and XPS spectra identify that the alkyl amine functional groups of AME involve in the transport of copper chloride species. The SAXS analysis demonstrates that the generated micro-channels in PIMs induced by the hydrophobic modification of 2-aminomethylpyridine derivatives can contribute to the enhanced Cu(Ⅱ) flux.展开更多
This paper reported the behavior of cyclic voltammetry (CV), differential pulsevoltammetry (DPV ) and spectroelectrochemistry (SEC) of Co2Co2-superoxide dismutase.The results obtained by CV and DPV were in agreement w...This paper reported the behavior of cyclic voltammetry (CV), differential pulsevoltammetry (DPV ) and spectroelectrochemistry (SEC) of Co2Co2-superoxide dismutase.The results obtained by CV and DPV were in agreement well with that obtained by SEC.The diffusion coefficient, the apparent number of electrons and oxidation-reductionpotentials were obtained.展开更多
A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L ...A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L 8H 2 and were characterized by elemental analysis、IR、 1HNMR and MS.展开更多
An efficient asymmetric alkenylation between 3-vinylindoles and isatin derivatives was developed under catalysis of a chiral copper complex.A series of optically active 3-alkenyl-3-substituted oxindoles were obtained ...An efficient asymmetric alkenylation between 3-vinylindoles and isatin derivatives was developed under catalysis of a chiral copper complex.A series of optically active 3-alkenyl-3-substituted oxindoles were obtained in excellent yields and stereoselectivities.The reaction mechanism was proposed and supported by DFT calculation.展开更多
基金financial supports from the National Key R&D Program of China(No.2019YFC1907801)National Natural Science Foundation of China(No.52174286)+1 种基金Hunan Provincial Science and Technology Plan Project,China(No.2019JJ30031)InnovationDriven of Central South University,China(No.2020CX007)。
文摘The Cu(Ⅱ) separation behaviors with polymer inclusion membranes(PIMs) are explored by modifying 2-aminomethylpyridine derivatives with hydrophobic alkyl chains, including 2-[N-(tert-butyloxycarbonylmethyl)-2-picolyamino]acetate(AMB), N,N-dioctyl-2-aminomethylpyridine(AMD), tert-butyl 2-(N-octyl-2-picolyamino) acetate(AMC), and N,N-didecyl-2-aminomethylpyridine(AME). The transport flux and selectivity of Cu(Ⅱ) are determined by optimizing composition and structure of carriers and plasticizers. The results show that the hydrophobic modification of 2-aminomethylpyridine derivatives can boost the selective transport of copper ions in PIMs and membrane stability. In the optimum composition of 30 wt.% PVC, 30 wt.% AME, and 40 wt.% NPOE, the initial flux of Cu(Ⅱ) is 5.8×10^(−6) mol·m^(−2)·s^(−1). The FT-IR and XPS spectra identify that the alkyl amine functional groups of AME involve in the transport of copper chloride species. The SAXS analysis demonstrates that the generated micro-channels in PIMs induced by the hydrophobic modification of 2-aminomethylpyridine derivatives can contribute to the enhanced Cu(Ⅱ) flux.
文摘This paper reported the behavior of cyclic voltammetry (CV), differential pulsevoltammetry (DPV ) and spectroelectrochemistry (SEC) of Co2Co2-superoxide dismutase.The results obtained by CV and DPV were in agreement well with that obtained by SEC.The diffusion coefficient, the apparent number of electrons and oxidation-reductionpotentials were obtained.
文摘A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L 8H 2 and were characterized by elemental analysis、IR、 1HNMR and MS.
基金support from the National Natural Science Foundation of China(No.21772185)supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB20000000).
文摘An efficient asymmetric alkenylation between 3-vinylindoles and isatin derivatives was developed under catalysis of a chiral copper complex.A series of optically active 3-alkenyl-3-substituted oxindoles were obtained in excellent yields and stereoselectivities.The reaction mechanism was proposed and supported by DFT calculation.
