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Electrochemical Behaviour of Europium-Ferrocene Derivative Complex Chemi cally Modified Electrodes
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作者 YANG Qing-hua, YE Xianzeng, HUANG Chun-hui (College of Chemical and Molecular Engineering, Peking University, Beijing 100871, China) 《Journal of Rare Earths》 SCIE EI CAS CSCD 2000年第1期13-13,共1页
Electrochemical behaviours of Europium-ferrocene derivative complex chemically modified electrodes were studied in the paper. Various factors which affect the voltammetry of the thin film modified electrodes, and the... Electrochemical behaviours of Europium-ferrocene derivative complex chemically modified electrodes were studied in the paper. Various factors which affect the voltammetry of the thin film modified electrodes, and the charge transport process of the thin film electrode were discussed. Size of the hydrated anion (counter ion), concentration of the electrolyte, swelling property of the film in the solvent and thickness of the film have significant effects on the voltammetry of the thin film electrode. Electrochemical behaviours of europium-ferrocene derivative compelx chemically modified electrode were studied in an aqueous solution. When scan ning between 0-0.8 V (vs. SCE), experimental results indicate that the chemically modified electrode has good stability and reproducibility. The apparent rate constant of electrode reaction is deteminedd to be 6.7×10-1 s-1. 展开更多
关键词 rare earths europium. ferrocene derivative coordination. chemically modified electrode thin film electrode
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Hybridized valence electrons of 4f^(0-14)5d^(0-1)6s^2:the chemical bonding nature of rare earth elements 被引量:11
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作者 薛冬峰 孙丛婷 陈小艳 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第9期837-843,共7页
The chemical bonding nature of rare earth(RE) elements can be studied by a quantitative analysis of electron domain of an atom. The outer electrons of RE elements are within the valence shell 4f^(0-14)5d^(0-1)6s... The chemical bonding nature of rare earth(RE) elements can be studied by a quantitative analysis of electron domain of an atom. The outer electrons of RE elements are within the valence shell 4f^(0-14)5d^(0-1)6s^2, which are involved in all chemical bonding features. We in this work found that the chemical bonding characteristics of 4f electrons are a kind of hybridizations, and classified them into three types of chemical bonding of 4f^(0-14)5d^(0-1)6s^2, furthermore, the coordination number ranging from 2 to 16 could thus be determined. We selected Y(NO_3)_3, La(NO_3)_3, Ce(NO_3)_3, YCl_3, LaCl_3, and CeCl_3 as examples to in-situ observe their IR spectra of chemical bonding behaviors of Y^(3+), La^(3+) and Ce^(3+) cations, which could show different chemical bonding modes of 4f and 5d electrons. In the present study, we obtained the direct criterion to confirm whether 4f electrons can participate in chemical bonding, that is, only when the coordination number of RE cations is larger than 9. 展开更多
关键词 rare earth orbital hybridization coordination number chemical bonding 4f electrons
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Chemical signals coordinate the dispersal of a plant-parasitic nematode with the metamorphosis of its vector beetle
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《Science Foundation in China》 CAS 2016年第4期42-42,共1页
With the support by the National Natural Science Foundation of China and the Chinese Academy of Sciences,Prof.Sun Jianghua(孙江华),Zou Zhen and Zhao Lilin et al.at the State Key Laboratory of Integrated Management of ... With the support by the National Natural Science Foundation of China and the Chinese Academy of Sciences,Prof.Sun Jianghua(孙江华),Zou Zhen and Zhao Lilin et al.at the State Key Laboratory of Integrated Management of Pest Insects and Rodents,Institute of Zoology,Chinese Academy of Sciences,uncovered that ascarosides coordinate the dispersal of a plant-parasitic nematode with the metamorphosis 展开更多
关键词 chemical signals coordinate the dispersal of a plant-parasitic nematode with the metamorphosis of its vector beetle
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