Author/Authors :
V.Raj Gopal، نويسنده , , V. and Jayathirtha Rao، نويسنده , , V. and Saroja، نويسنده , , G. and Samanta، نويسنده , , A.، نويسنده ,
Abstract :
The fluorescence properties of some pyrenylethylene derivatives capable of exhibiting twisted intramolecular charge transfer phenomenon havebeen studied as a function of solvent polarity. The solvent polarity dependent change in the fluorescence quantum yield has been interpreted in terms of intramolecular retational relaxations. The trans → cis photoisomerization data of the compounds indicate that the twist around the ethylenic double bond is accelerated in polar solvents.
