Issue 19, 2017

Femtosecond time-resolved photoelectron spectroscopy of the benzyl radical

Abstract

We present a joint experimental and computational study of the nonradiative deactivation of the benzyl radical, C7H7, after UV excitation. Femtosecond time-resolved photoelectron imaging was applied to investigate the photodynamics of the radical. The experiments were accompanied by excited state dynamics simulations using surface hopping. Benzyl has been excited at 265 nm into the D-band (ππ*) and the dynamics was probed using probe wavelengths of 398 nm or 798 nm. At a probe wavelength of 398 nm a single time constant of around 70–80 fs was observed. When the dynamics was probed at 798 nm, a second time constant τ2 = 1.5 ps was visible, which can be attributed to further non-radiative deactivation to the lower-lying D1/D2 states.

Graphical abstract: Femtosecond time-resolved photoelectron spectroscopy of the benzyl radical

Supplementary files

Article information

Article type
Paper
Submitted
06 Mar 2017
Accepted
12 Apr 2017
First published
12 Apr 2017

Phys. Chem. Chem. Phys., 2017,19, 12365-12374

Femtosecond time-resolved photoelectron spectroscopy of the benzyl radical

A. Röder, A. Humeniuk, J. Giegerich, I. Fischer, L. Poisson and R. Mitrić, Phys. Chem. Chem. Phys., 2017, 19, 12365 DOI: 10.1039/C7CP01437F

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