Exploring the energy disposal immediately after bond-breaking in solution: the wavelength-dependent excited state dissociation pathways of para-methylthiophenol
作者： Yuyuan Zhang , Thomas A. A. Oliver , Saptaparna Das , Anirban Roy , Michael N. R. Ashfold
DOI: 10.1021/JP405160N
关键词:
摘要: A wavelength-resolved (λpump = 295, 285, 270, and 267 nm) photodissociation study of para-methylthiophenol (p-MePhSH) in ethanol solution has been performed using femtosecond transient absorption (TA) spectroscopy, the results compared with those from studies corresponding cyclohexane at 270 nm. Anisotropy spectra are used to identify electronic character initially populated excited state(s). S–H bond fission is found occur via dissociative S2(11πσ*) state, which can be directly, or by ultrafast nonradiative transitions S3(21ππ*) very efficient tunneling S1(11ππ*) depending on excitation wavelength, line conclusions previous gas-phase this same molecular (Oliver, T. A. A.; King, G. Tew, D. P.; Dixon R. N.; Ashfold, M. N. J. Phys. Chem. 2012, 116, 12444). p-MePhS radicals observed a time scale faster than instrument response all wave...
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