Abstract
The spectroscopy and relaxation dynamics of propynal in condensed media were studied by wavelength and time resolved laser-induced fluorescence techniques. Ã 1A′ fluorescence quantum yields are low, with intersystem crossing into the ã 3A′ state being the dominant relaxation pathway. The ã 3A′ state phosphorescence seems to occur in solid neon with near unity quantum yield. The very detailed spectroscopic information obtained from the emission and excitation spectra suggests a remarkably weak medium perturbation in solid neon.
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