PHOTOPHYSICAL BEHAVIOR OF SOME PYRENYLETHYLENE DERIVATIVES AND ITS IMPLICATION ON TRANS-]CIS PHOTOISOMERIZATION REACTIONS

Authors
GOPAL VR RAO VJ SAROJA G SAMANTA A
Citation
Vr. Gopal et al., PHOTOPHYSICAL BEHAVIOR OF SOME PYRENYLETHYLENE DERIVATIVES AND ITS IMPLICATION ON TRANS-]CIS PHOTOISOMERIZATION REACTIONS, Chemical physics letters, 270(5-6), 1997, pp. 593-598
Citations number
22
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
270
Issue
5-6
Year of publication
1997
Pages
593 - 598
Database
ISI
SICI code
0009-2614(1997)270:5-6<593:PBOSPD>2.0.ZU;2-G
Abstract
The fluorescence properties of some pyrenylethylene derivatives capabl e of exhibiting twisted intramolecular charge transfer phenomenon have been studied as a function of solvent polarity. The solvent polarity dependent change in the fluorescence quantum yield has been interprete d in terms of intramolecular rotational relaxations. The trans --> cis photoisomerisation data of the compounds indicate that the twist arou nd the ethylenic double bond is accelerated in polar solvents.