Synthesis of solvatochromic cyanine dyes having a benzo[a]quinolizinium ring
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 7,p. 1915-1917
- https://doi.org/10.1039/p19900001915
Abstract
New stilbazolium cyanine-type dyes were synthesized by the base-catalysed aldol-type condensation of 2-methylbenzo[a]quinolizinium perchlorate with hydroxy-substituted benzaldehyde derivatives. The long wavelength absorption band of the deprotonated form of the dyes underwent a remarkable hypsochromic shift as the solvent polarity increased, and the pronounced negative solvato-chromism extended over the whole visible region.This publication has 0 references indexed in Scilit: