To explore the mechanism of carbonyl iron flake composites for microwave complex permeability, this paper investigates the feature of the flakes. The shape anisotropy was certified by the results of the magnetization ...To explore the mechanism of carbonyl iron flake composites for microwave complex permeability, this paper investigates the feature of the flakes. The shape anisotropy was certified by the results of the magnetization hysteresis loops and the Mossbauer spectra. Furthermore, the shape anisotropy was used to explain the origin of composite microwave performance, and the calculated results agree with the experiment. It is believed that the shape anisotropy dominates microwave complex permeability, and the natural resonance plays main role in flake.展开更多
In this work, with the purpose to explore the coordination chemistry of calcium complexes which could work as a partial model of manganese-calcium cluster, a spectrophotometric study to evaluate the stability of the c...In this work, with the purpose to explore the coordination chemistry of calcium complexes which could work as a partial model of manganese-calcium cluster, a spectrophotometric study to evaluate the stability of the complexes: Calcium(Ⅱ)-1,2-ethylendiamine, Calcium(Ⅱ)-1,3-propanediamine and Calcium(Ⅱ)-1,4-butanediamine in acetonitrile, were carried on. By processing the spectrophotometric data with the HypSpec program allows the determination of the formation constants. The logarithmic values of the formation constants obtained for Calcium(Ⅱ)-1,2-ethylendiamine, Calcium(Ⅱ)-1,3-propanediamine and Calcium(Ⅱ)-1,4-butanediamine were log β_(110) = 4.69, log β_(110)= 5.25 and log β_(110) = 4.072, respectively.展开更多
A series of biopolymer based complex were manufactured by coordinating iron ions to the abundant amino-and sulfur-containing groups in the modified wool and used as heterogeneous Fenton-like photocatalyst for 4-chloro...A series of biopolymer based complex were manufactured by coordinating iron ions to the abundant amino-and sulfur-containing groups in the modified wool and used as heterogeneous Fenton-like photocatalyst for 4-chlorophenol (4-CP) degradation in the presence of H2O2. Hydroxylamine hydrochloride (NH2OH center dot HCl) or acrylic acid was employed to modify the natural wool to strengthen the interaction with iron and to reinforce the structural stability. The NH2OH center dot HCl modified wool based complex showed the best catalytic performance for 4-CP degradation. The strong coordination between iron and great number of hydroxamic acid in this modified complex leads to the least iron leaching during the tests. HO center dot species was confirmed to be the dominant reactive oxidant in the decontamination process. The approach presented in this study can provide a new approach for developing novel bioployermer-based photocatalysts for efficient degradation of toxic organic pollutants such as 4-CP. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.展开更多
A new ruthenium polypyridine complex, [Ru(phen) 2(pMIP)] 2+(phen=1,10-phenanthroline, pMIP=2-(4-methylphenyl)imidazo phenanthroline), was synthesized and characterized by elementary analysis, MS and 1H NMR. Spectrosco...A new ruthenium polypyridine complex, [Ru(phen) 2(pMIP)] 2+(phen=1,10-phenanthroline, pMIP=2-(4-methylphenyl)imidazo phenanthroline), was synthesized and characterized by elementary analysis, MS and 1H NMR. Spectroscopic methods have been carried out on the interaction mechanism of the Ru (Ⅱ) complex with yeast tRNA systematically. The experimental results indicate that the complex binds to yeast tRNA with an intercalative mode possibly, and interacts with yeast tRNA enantioselectively. The experimental results also suggest that spectroscopic method is effective on studying the interaction mechanism of Ru (Ⅱ) complexes with RNA. Information obtained from the study is potentially useful in the design of new RNA-targeting drugs.展开更多
Grafting dodecyl in EDTA,A ligand-N,N′-di ( dodecyl ) disodium ethylenediamine di-acetic acid was synthesized and its complex C 30 H 58 O 4N 2Cu ( Ⅱ ) was obtained in chloroformme∶thanol=1∶1( V/V ).The products we...Grafting dodecyl in EDTA,A ligand-N,N′-di ( dodecyl ) disodium ethylenediamine di-acetic acid was synthesized and its complex C 30 H 58 O 4N 2Cu ( Ⅱ ) was obtained in chloroformme∶thanol=1∶1( V/V ).The products were characterized by IR?EA? 1HNMR and UV spectra.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos 90505007 and 10774061)
文摘To explore the mechanism of carbonyl iron flake composites for microwave complex permeability, this paper investigates the feature of the flakes. The shape anisotropy was certified by the results of the magnetization hysteresis loops and the Mossbauer spectra. Furthermore, the shape anisotropy was used to explain the origin of composite microwave performance, and the calculated results agree with the experiment. It is believed that the shape anisotropy dominates microwave complex permeability, and the natural resonance plays main role in flake.
基金the Secretaria de Educacion Publica(SEP)through PRODEP program for their economic support in the project "Equilibrios de Formacion de Complejos de Manganeso(Ⅱ)-Diamina para su Aplicacion en Sistemas de Fotosintesis Artificial"the Secretaria de Innovacion,Cienciay Educacion Superior(SICES)for its economic support through their program"Convocatoria de Investigadores Jovenes 2016",in the project "Obtencion de Clusteres Manganeso-Calcio para su Aplicacion Potencial en Sistemas de Fotosintesis Artificial"
文摘In this work, with the purpose to explore the coordination chemistry of calcium complexes which could work as a partial model of manganese-calcium cluster, a spectrophotometric study to evaluate the stability of the complexes: Calcium(Ⅱ)-1,2-ethylendiamine, Calcium(Ⅱ)-1,3-propanediamine and Calcium(Ⅱ)-1,4-butanediamine in acetonitrile, were carried on. By processing the spectrophotometric data with the HypSpec program allows the determination of the formation constants. The logarithmic values of the formation constants obtained for Calcium(Ⅱ)-1,2-ethylendiamine, Calcium(Ⅱ)-1,3-propanediamine and Calcium(Ⅱ)-1,4-butanediamine were log β_(110) = 4.69, log β_(110)= 5.25 and log β_(110) = 4.072, respectively.
基金National Natural Science Foundation of China (grant nos.51268001,21303141) for support of this work
文摘A series of biopolymer based complex were manufactured by coordinating iron ions to the abundant amino-and sulfur-containing groups in the modified wool and used as heterogeneous Fenton-like photocatalyst for 4-chlorophenol (4-CP) degradation in the presence of H2O2. Hydroxylamine hydrochloride (NH2OH center dot HCl) or acrylic acid was employed to modify the natural wool to strengthen the interaction with iron and to reinforce the structural stability. The NH2OH center dot HCl modified wool based complex showed the best catalytic performance for 4-CP degradation. The strong coordination between iron and great number of hydroxamic acid in this modified complex leads to the least iron leaching during the tests. HO center dot species was confirmed to be the dominant reactive oxidant in the decontamination process. The approach presented in this study can provide a new approach for developing novel bioployermer-based photocatalysts for efficient degradation of toxic organic pollutants such as 4-CP. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
文摘A new ruthenium polypyridine complex, [Ru(phen) 2(pMIP)] 2+(phen=1,10-phenanthroline, pMIP=2-(4-methylphenyl)imidazo phenanthroline), was synthesized and characterized by elementary analysis, MS and 1H NMR. Spectroscopic methods have been carried out on the interaction mechanism of the Ru (Ⅱ) complex with yeast tRNA systematically. The experimental results indicate that the complex binds to yeast tRNA with an intercalative mode possibly, and interacts with yeast tRNA enantioselectively. The experimental results also suggest that spectroscopic method is effective on studying the interaction mechanism of Ru (Ⅱ) complexes with RNA. Information obtained from the study is potentially useful in the design of new RNA-targeting drugs.
文摘Grafting dodecyl in EDTA,A ligand-N,N′-di ( dodecyl ) disodium ethylenediamine di-acetic acid was synthesized and its complex C 30 H 58 O 4N 2Cu ( Ⅱ ) was obtained in chloroformme∶thanol=1∶1( V/V ).The products were characterized by IR?EA? 1HNMR and UV spectra.
