Isomer-specific spectroscopy and conformational isomerization energetics of o-, m-, and p-ethynylstyrenes

Talitha M. Selby, Jasper R. Clarkson, Diane Mitchell, James A.J. Fitzpatrick, Hsiupu D. Lee, David W. Pratt, Timothy S. Zwier

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The infrared and ultraviolet spectroscopy of o-, m-, and p-ethynylstyrene isomers were studied using a combination of methods, including UV hole burning spectroscopy (UVHB) and resonant ion-dip infrared spectroscopy (RIDIRS). In all the three isomers, the acetylenic C-H stretch fundamental was split by Fermi resonance. In all of them, the acetylenic C-H stretch fundamental was unshifted from the ground state. The first observed and last observed transistions in the SEP-PT spectrum were used to place lower and upper bounds on the barrier to cis to trans isomerization in m-ethynylstyrene of 990-1070 cm -1.

Original languageEnglish
Pages (from-to)4484-4496
Number of pages13
JournalJournal of Physical Chemistry A
Volume109
Issue number20
DOIs
StatePublished - May 26 2005
Externally publishedYes

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