Abstract
Transient grating spectroscopy using a femtosecond white-light continuum was developed and applied to the spectral analysis of intersystem crossing of benzophenone in solution. The diffraction spectra corresponding to S n ←S 1 and T n ←T 1 transient absorption were observed for the first time. The rate constants of intersystem crossing in acetonitrile and CCl 4 were estimated to be (9.6 ± 0.9 ps) −1 and (11.6 ± 0.9 ps) −1, respectively.
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