Preferential Stabilization of Different Isomers of Weakly Bound Complexes

David S. Boucher, Matthew D. Bradke, Joshua P. Darr, Richard A. Loomis

Research output: Contribution to journalArticle

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Abstract

The experimental results reported here demonstrate that weakly bound van der Waals complexes are not necessarily kinetically trapped in different isomeric forms in a supersonic expansion. We have recorded the laser-induced fluorescence spectra of the near T-shaped and linear He⋯ICl(X 1σ+,μ″ = 0) complexes in the ICl B-X, 3-0 spectral region at varying distances along the expansion direction to monitor the populations of the two isomers as the local density, collision frequency, and temperature change. The ratio of the T-shaped to linear complex populations monotonically decreases with increasing downstream distances and thus lower ICl(X) rotational temperatures. Conversion from T-shaped to linear complexes is still observed at the furthest distances where a temperature of 0.57(8) K is measured.

Original languageEnglish (US)
Pages (from-to)6901-6904
Number of pages4
JournalJournal of Physical Chemistry A
Volume107
Issue number36
DOIs
StatePublished - Sep 11 2003

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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