Excited-state dissociation dynamics of phenol studied by a new time-resolved technique

The Journal of Chemical Physics
Yen-Cheng LinChi-Kung Ni

Abstract

Phenol is an important model molecule for the theoretical and experimental investigation of dissociation in the multistate potential energy surfaces. Recent theoretical calculations [X. Xu et al., J. Am. Chem. Soc. 136, 16378 (2014)] suggest that the phenoxyl radical produced in both the X and A states from the O-H bond fission in phenol can contribute substantially to the slow component of photofragment translational energy distribution. However, current experimental techniques struggle to separate the contributions from different dissociation pathways. A new type of time-resolved pump-probe experiment is described that enables the selection of the products generated from a specific time window after molecules are excited by a pump laser pulse and can quantitatively characterize the translational energy distribution and branching ratio of each dissociation pathway. This method modifies conventional photofragment translational spectroscopy by reducing the acceptance angles of the detection region and changing the interaction region of the pump laser beam and the molecular beam along the molecular beam axis. The translational energy distributions and branching ratios of the phenoxyl radicals produced in the X, A, and B states fr...Continue Reading

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Citations

Jul 25, 2018·The Journal of Chemical Physics·Hsin Ying LaiChien-Ming Tseng
Oct 17, 2019·The Journal of Chemical Physics·Wan Ru JhangChien-Ming Tseng
Aug 20, 2019·Chemical Reviews·Satchin SoorkiaGilles Grégoire
Feb 12, 2019·The Journal of Physical Chemistry. a·Kyung Chul Woo, Sang Kyu Kim
Nov 13, 2020·The Journal of Physical Chemistry. a·Graham A CooperMichael N R Ashfold

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