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Solution electrochemistry of indolenium squarylium cyanine dyes

journal contribution
posted on 1999-05-01, 00:00 authored by L Tong, P Bi-Xian, F Lou-Zhen, L Yong-Fang, B Feng-Lian, P Zheng-Hong, H Geise
The redox potential of a class of donor-acceptor-donor (D-A-D) molecules, bis(5-substituent-2,3,3,-trimethylindolenium-2-ylidene)squaraines (Sq 1-8), were determined. All the dyes exhibit two reversible oxidation potentials in methanol. C-5 substituents at the indolenium moieties exert a small effect on the first oxidation potential, and the substituent effect is attributed to the inductive parameters. The frontier orbital energy levels were calculated by the AM1-SCF method. A good linear relationship between the highest occupied molecular orbital energy level and the first oxidation potential was found.

History

Journal

Dyes and pigments

Volume

42

Issue

2

Pagination

113 - 116

Publisher

Elsevier Science

Location

Amsterdam, The Netherlands

ISSN

0143-7208

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1999, Elsevier Science