Neutral carrier membrane electrode based on binuclear metalloporphyrin |
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| Authors: | De Gao Dong Liu Ru-Qin Yu and Guo-Dong Zheng |
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| Institution: | (1) Department of Chemistry and Chemical Engineering, Hunan University, 410082 Changsha, People's Republic of China;(2) Department of Chemistry, Jilin University, 130023 Changchun, People's Republic of China |
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| Abstract: | A new kind of neutral carrier is described, binuclear metalloporphyrin, which exhibits the anti-Hofmeister selectivity pattern for anions. A comparison of potentiometric response characteristics between the binuclear and mononuclear metalloporphyrins is discussed in view of the coordination chemistry of metalloporphyrins. The interaction between the ionophore and the analyte anion was investigated by UV/Vis and IR spectroscopy. The transfer process of the analyte anion across the membrane interface was studied by A.C. impedance measurements. The origin of the anti-Hofmeister selectivity sequence was explored by quantum chemical calculations. |
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