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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 42,
  • Issue 1,
  • pp. 27-31
  • (1988)

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.

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