CATION-BINDING AND PHOTOPHYSICAL PROPERTIES OF A MONOAZA-15-CROWN-5-ETHER LINKED CYANINE DYE

Authors
THOMAS KJ THOMAS KG MANOJKUMAR TK DAS S GEORGE MV
Citation
Kj. Thomas et al., CATION-BINDING AND PHOTOPHYSICAL PROPERTIES OF A MONOAZA-15-CROWN-5-ETHER LINKED CYANINE DYE, Proceedings of the Indian Academy of Sciences. Chemical sciences, 106(6), 1994, pp. 1375-1382
Citations number
21
Journal title
Proceedings of the Indian Academy of Sciences. Chemical sciences → ACNP
ISSN journal
02534134
Volume
106
Issue
6
Year of publication
1994
Pages
1375 - 1382
Database
ISI
SICI code
0253-4134(1994)106:6<1375:CAPPOA>2.0.ZU;2-W
Abstract
A cyanine chromoionophore 1 has been synthesised and its photophysical properties have been investigated. Complexation with alkali metal cat ions (Li+ and Na+) brings about a significant shift in the absorption and emission spectra to shorter wavelengths, which is accompanied by a n enhancement in the fluorescence quantum yield. These effects can be attributed to the suppression of intramolecular charge transfer proces ses of the cyanine dye, brought about by complexation with the metal c ations.