Fluorescence Lifetime of Benzene and Benzene‐d6 Vapor Excited to Single Vibronic Levels

作者: Benjamin K. Selinger , William R. Ware

DOI: 10.1063/1.1674464

关键词: Quenching (fluorescence)BenzeneAtomic physicsQuantum yieldExcited stateExcitationIsopentaneKinetic isotope effectChemistryDeuteriumPhysical and Theoretical ChemistryGeneral Physics and Astronomy

摘要: The fluorescence decay curves and lifetimes of benzene benzene‐d6 vapor have been determined for excitation to each several low‐lying single vibronic levels the 1B2u state. Measurements were made at pressures as low 0.1 torr, where system is essentially collision free, higher both plus an added thermalizing gas. lifetime was found vary with vibrational level acting origin emission. variation radiative consistent predictions Herzberg–Teller Theory vibronically induced transition. In addition, there appears be a deuterium isotope effect on nonradiative processes. obtained permit re‐examination some steady‐state data in literature pertaining quantum yield pressure. Also, inefficient electronic quenching when isopentane used

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