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Excited-State Triplet-Triplet Absorption in NPO

Volume 41, Number 8 (Dec. 1987) Page 1318-1324

Dharamsi, A.N.; Hassam, A.B.


Time-resolved excited-state triplet-triplet absorption measurements in αNPO solutions were performed. A concentration quenching effect on the excited absorption and fluorescence spectra, due to excimer formation, was seen. A numerical analysis of the results yielded the rate constants for intersystem crossing, triplet quenching by O2, triplet self-quenching, and excimer formation.