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Measurement of Dipole Moments and Lifetimes of Triplet States of Fluorenone and Its Derivatives by Time Resolved Microwave Dielectric Absorption
Tetali A. Prasada Rao, Jandhyala Sobhanadri, Vemuri Rama Krishna Murthy
Published in Physical Society of Japan
Volume: 67
Issue: 4
Pages: 1220 - 1225
The technique of time resolved microwave dielectric absorption has been used to study the excited triplet states formed by the laser flash photolysis. The details of the experimental method and apparatus are discussed. The triplet state lifetimes and triplet state dipole moments of fluorenone and its derivatives are reported. The triplet state lifetime of fluorenone agrees with that obtained by optical absorption. The lifetime measurements with argon purging and with air equilibrated solution confirm the formation of triplet states. A marked increase in the triplet state dipole moment of fluorenone and its derivatives is observed and implies that their lowest triplet state is of (π, π*) in nature.
About the journal
JournalJournal of the Physical Society of Japan
PublisherPhysical Society of Japan
Open AccessNo