Orientation and molecular orbital dependences in electronic relaxation collisions studied through van der Waals complexes

L. Lapierre; P. Y. Cheng; Shan Shan Ju; Y. M. Hahn; Hai-Lung Dai

doi:10.1117/12.58146

1 April 1992 Orientation and molecular orbital dependences in electronic relaxation collisions studied through van der Waals complexes

L. Lapierre, P. Y. Cheng, Shan Shan Ju, Y. M. Hahn, Hai-Lung Dai

Author Affiliations +

Proceedings Volume 1638, Optical Methods for Time- and State-Resolved Chemistry; (1992) https://doi.org/10.1117/12.58146
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The orientation dependence in the spin changing collisions C₂H₂O₂(S₁)+AryieldsC₂H₂O₂(T₁)+Ar and C₂H₂(S₁)+AryieldsC₂H₂(T)+Ar has been examined by time-resolved laser induced fluorescence studies of the intersystem crossing rates in the C₂H₂O₂-Ar and C₂H₂-Ar complexes with different isomeric structures. It was found that when Ar interacts primarily with the n(O) orbital the S₁yieldsT₁ transition rate is about two orders of magnitude faster than that induced by Ar interacting primarily with the (pi) ^*(CO) orbital. On the other hand, the studies in acetylene show that the Ar induced intersystem crossing rate is nearly identical for both the (pi) and (pi) ^* orbitals.

Citation Download Citation

L. Lapierre, P. Y. Cheng, Shan Shan Ju, Y. M. Hahn, and Hai-Lung Dai "Orientation and molecular orbital dependences in electronic relaxation collisions studied through van der Waals complexes", Proc. SPIE 1638, Optical Methods for Time- and State-Resolved Chemistry, (1 April 1992); https://doi.org/10.1117/12.58146

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