Solution electrochemistry of indolenium squarylium cyanine dyes

Citation
T. Lin et al., Solution electrochemistry of indolenium squarylium cyanine dyes, DYE PIGMENT, 42(2), 1999, pp. 113-116
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
DYES AND PIGMENTS
ISSN journal
0143-7208 → ACNP
Volume
42
Issue
2
Year of publication
1999
Pages
113 - 116
Database
ISI
SICI code
0143-7208(19990514)42:2<113:SEOISC>2.0.ZU;2-O
Abstract
The redox potential of a class of donor-acceptor-donor (D-A-D) molecules, b is(5-substituent-2,3,3,-trimethyl-indolenium-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 effe ct on the first oxidation potential, and the substituent effect is attribut ed to the inductive parameters. The frontier orbital energy levels were cal culated by the AM1-SCF method. A good linear relationship between the highe st occupied molecular orbital energy level and the first oxidation potentia l was found. (C) 1999 Elsevier Science Ltd. All rights reserved.