Evidence for nonemissive exciplexes in the singlet quenching of polycyclic aromatic hydrocarbons by polychlorobenzenes in cyclohexane
VN Grosso, CA Chesta, CM Previtali - Journal of Photochemistry and …, 1998 - Elsevier
The quenching of the singlet excited state of several polycyclic aromatic hydrocarbons
(PAH) by polychlorobenzenes was investigated in cyclohexane by static and time-resolved
fluorescence measurements. Intensity Stern–Volmer plots were linear, while the
corresponding τ0/τ plots presented a downward curvature. Laser flash photolysis
experiments indicated that the only intermediate formed in the quenching process is the
triplet state of the PAH. The efficiency of the triplet formation was determined and it was …
(PAH) by polychlorobenzenes was investigated in cyclohexane by static and time-resolved
fluorescence measurements. Intensity Stern–Volmer plots were linear, while the
corresponding τ0/τ plots presented a downward curvature. Laser flash photolysis
experiments indicated that the only intermediate formed in the quenching process is the
triplet state of the PAH. The efficiency of the triplet formation was determined and it was …