IONOELECTRONICS - CATION-INDUCED NONLINEAR COMPLEXATION - CROWN-ETHER-SUBSTITUTED AND POLY(ETHYLENE-OXIDE)-SUBSTITUTED LUTETIUM BISPHTHALOCYANINES

被引：133

作者：

TOUPANCE, T ^{[1
]}

AHSEN, V ^{[1
]}

SIMON, J ^{[1
]}

机构：

[1] ECOLE SUPER PHYS & CHIM IND VILLE PARIS,CNRS,F-75231 PARIS 05,FRANCE

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1994年 / 116卷 / 12期

关键词：

D O I：

10.1021/ja00091a046

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lutetium bisphthalocyanines symmetrically substituted with crown ether macrocycles ([(15-C-5)(4)Pc]Lu-2, [(18-C-6)(4)Pc]Lu-2) or linear poly(ethylene oxide) chains ([(RO)(8)Pc]Lu-2) have been synthesized and characterized. An unsymmetrical complex ([(15-C-5)(4)Pc]Lu[Pc(OR)(8)]) is also described. The selectivity of complexation toward alkali cations is determined by the picrate extraction method. Titration curves have been obtained by UV-visible spectroscopy, showing that large alkali cations induce the formation of aggregates via a positive cooperativity effect. A sigmoidal titration curve is obtained for the couple [(18-C-6)(4)Pc]Lu-2/Rb+. The shape of the curve is very similar to the one obtained for the complexation of O-2 by hemoglobin, where a nonlinear binding process is well established. The obtainment of this phenomenon is a key step toward the realization of ionoelectronics networks.

引用

页码：5352 / 5361

页数：10

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