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 journalArticlepeer-review

30 Scopus citations


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
Issue number36
StatePublished - Sep 11 2003
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


Dive into the research topics of 'Preferential Stabilization of Different Isomers of Weakly Bound Complexes'. Together they form a unique fingerprint.

Cite this