Vibrational state-specific nonadiabatic photodissociation dynamics of OCS+ via A2Π1/2 (ν1 0 ν3) states

Yaling Wang; Yunfan Zhao; Ning Zhang; Wenxin Wang; Liru Hu; Chang Luo; Daofu Yuan; Xiaoguo Zhou; David H Parker; Xueming Yang; Xingan Wang

doi:10.1063/5.0191893

Vibrational state-specific nonadiabatic photodissociation dynamics of OCS+ via A2Π1/2 (ν1 0 ν3) states

J Chem Phys. 2024 Feb 28;160(8):084301. doi: 10.1063/5.0191893.

Authors

Yaling Wang¹, Yunfan Zhao¹, Ning Zhang¹, Wenxin Wang¹, Liru Hu¹, Chang Luo¹, Daofu Yuan¹, Xiaoguo Zhou¹, David H Parker², Xueming Yang^{3

4

5}, Xingan Wang^{1

5}

Affiliations

¹ Hefei National Research Center for Physical Science at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
² Department of Molecular and Laser Physics, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
³ State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
⁴ Department of Chemistry, School of Science, Southern University of Science and Technology, Shenzhen 518055, China.
⁵ Hefei National Laboratory, Hefei 230088, China.

PMID: 38385514
DOI: 10.1063/5.0191893

Abstract

The identification and analysis of quantum state-specific effects can significantly deepen our understanding of detailed photodissociation dynamics. Here, we report an experimental investigation on the vibrational state-mediated photodissociation of the OCS+ cation via the A2Π1/2 (ν1 0 ν3) states by using the velocity map ion imaging technique over the photolysis wavelength range of 263-294 nm. It was found that the electronically excited S+ product channel S+(2Du) + CO (X1Σ+) was significantly enhanced when the ν1 and ν3 vibrational modes were excited. Clear deviations in the branching ratios of the electronically excited S+ channel were observed when the vibrational modes ν1 and ν3 were selectively excited. The results reveal that vibrationally excited states play a vital role in influencing the nonadiabatic couplings in the photodissociation process.