Photochemical and Photophysical Studies on Isatin
No Thumbnail Available
Date
1983-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa Universty
Abstract
The fading rate of isatin in different solvents is
investigated. the rate is in accordance with the hydrogen -
atom donation capacities of the solvents. As the polarity of the
solvent is increased the charge transfer character of the longest
wavelength transition becomes dominat I'lhich prohobits photo:L'e-ยท
duction. This was confirmed by the red shift of the '118.velenC';:th
of maximum absorption with increase in solvent polarity and
comparative fading rate of the derivatives of isatin (N - meth;yl
isatin and H .- acetyl isatin).
Holecular oxygen Vias found to quench the photoreduction.
Fluorescence spectrum at different oxygen concentration has
been investigated in an attempt to trace the spin state from
vlhich the reaction starts.
Two photoproducts were separated, the major product (over
95%) \'las characterized to be a pinacol and the second is the
product of insertion of a single oxygen to isatin molecule.
Description
Keywords
Isatin