CHARGE TRAPPING BY ANIONIC QUINONES ELECTROSTATICALLY BOUND TO A HIGHLY-CHARGED CATIONIC QUINONE VIOLOGEN POLYMER OR A CATIONIC POLY(3-VIOLOGEN-THIOPHENE)

被引：17

作者：

HABLE, CT ^{[1
]}

CROOKS, RM ^{[1
]}

VALENTINE, JR ^{[1
]}

GIASSON, R ^{[1
]}

WRIGHTON, MS ^{[1
]}

机构：

[1] MIT, DEPT CHEM, CAMBRIDGE, MA 02139 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 22期

关键词：

D O I：

10.1021/j100124a045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Charge associated with quinone reduction is trapped at low pH in systems composed of sulfonated anthraquinones electrostatically bound to a polymer derived from a monomer consisting of a quinone unit flanked by two viologen units. Each monomer repeat unit carries 6 equiv of positive charge which can be charge compensated by monosulfonated anthraquinone to yield a quinone:viologen ratio of nearly 7:2. At low pH, electrostatic binding is persistent, and the amount of trapped charge is 90% of the theoretical maximum. Some of the electrostatically bound quinone can be replaced with Fe(CN)63- to allow mediated release of trapped charge via the Fe(CN)63-/4- redox couple. I- is blocked from entering the polymer and thus does not mediate release of charge. Electrostatic binding of anionic quinones to a thiophene polymer with pendant viologen units has also been demonstrated. This polymer system has the unique property of having built-in mediators for both the reduction (charge trapping) and oxidation (charge release) of the electrostatically bound anthraquinone.

引用

页码：6060 / 6065

页数：6