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Preparation of substituted rare‐earth metal diphthalocyanine complexes and study of their electrochemical behavior
Author(s) -
Liu YunQi,
Shigehara Kiyotaka,
Yamada Akira
Publication year - 1989
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19890070304
Subject(s) - chemistry , electrochromism , electrochemistry , phthalocyanine , metal , redox , inorganic chemistry , pyrolytic carbon , oxide , indium tin oxide , electrode , aqueous solution , organic chemistry , pyrolysis
Rare‐earth metal diphthalocyanine complexes with R substituents, R 8 Pc 2 MH (where Pc=phthalocyanine; R=propoxy, t ‐butyl; M=Er, Lu), were prepared. Their films on basal plane pyrolytic graphite and on indium‐tin oxide Nesa glass electrodes in several aqueous electrolytes were investigated by voltammetric analysis and in situ electronic absorption spectroscopy at controlled potentials. These modified electrodes showed multi‐color electrochromic behavior as a result of multi‐step redox reaction. The film color turned from original green through orange to red in an oxidation process, and through dark blue to purplish in a reduction process.