Triplet-State Kinetics of 2,5 Diphenyloxazole (PPO)

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Abstract:

Time-resolved excited-state triplet-triplet absorption spectra were measured for solutions of 2,5 diphenyloxazole (PPO) in various solvents, with the use of a pump and probe technique. The rate constants for intersystem crossing, triplet deactivation by oxygen, and triplet-triplet self-quenching are obtained. The latter two rate constants are substantially larger than the corresponding rate constants for 2-(1 naphthyl)-5-phenyloxazole-αNPO.

Keywords: Spectroscopic techniques; Time-resolved spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702884428473

Affiliations: 1: Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, Virginia 23529-0246 2: Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, Virginia 23529-0246; current address: NASA Goddard Space Flight Center, Greenbelt, MD 20771

Publication date: January 1, 1988

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