Electrogenerated chemiluminescence of sterically hindered porphyrins in aqueous media

被引：32

作者：

Chen, FC ^{[1
]}

Ho, JH ^{[1
]}

Chen, CY ^{[1
]}

Su, YO ^{[1
]}

Ho, TI ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 10764, Taiwan

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2001年 / 499卷 / 01期

关键词：

electrogenerated chemiluminescence; sterically hindered; porphyrins;

D O I：

10.1016/S0022-0728(00)00439-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sterically hindered water-soluble porphyrin, tetrakis(3-sulfonatomesityl)porphyrin (H2TSMP), could form stable radical cation in aqueous media after electrochemical one electron oxidation. The anodic oxidation of H2TSMP in the presence of tripropylamine or C2O42- as a coreactant in aqueous solution produces electrogenerated chemiluminescence (ECL) with maxima at 640 and 700 nm. The same emission spectrum of ECL and fluorescence indicates that the ECL emission is from the singlet state of H2TSMP. The annihilation reactions of ZnTSMP (+) and ZnTSMP (-), which are generated electrochemically, in CH3CN + H2O (1:1) mixed solution results in an emission which is identical to the photoluminescence. Protection of the active sites against the nucleophilic attack of water or OH- by sterical hinderance is a successful strategy in designing new ECL-active compounds in aqueous media. Both ECL reaction mechanisms are proposed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：17 / 23

页数：7

共 38 条

[1] Aggregation of tetraaryl-substituted porphyrins in homogeneous solution [J].