MATRIX-ISOLATION SUPERSONIC JET INFRARED-SPECTROSCOPY - CONFORMATIONAL COOLING IN TRIMETHYL PHOSPHATE

Citation
V. Vidya et al., MATRIX-ISOLATION SUPERSONIC JET INFRARED-SPECTROSCOPY - CONFORMATIONAL COOLING IN TRIMETHYL PHOSPHATE, Chemical physics letters, 258(1-2), 1996, pp. 113-117
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
0009-2614
Volume
258
Issue
1-2
Year of publication
1996
Pages
113 - 117
Database
ISI
SICI code
0009-2614(1996)258:1-2<113:MSJI-C>2.0.ZU;2-U
Abstract
A supersonic jet source has been coupled to a matrix isolation set-up to obtain conformational cooling in organic phosphates. Infrared spect ra of trimethyl phosphate (TMP) trapped in a nitrogen matrix using sup ersonic jet sampling, indicated that the higher-energy conformer of TM P was significantly depopulated, compared with the spectra recorded us ing the conventional effusive source. The conformational temperature w as estimated to be 147 K. This study demonstrates for the first time t he successful use of supersonic jet sampling to obtain conformational cooling in molecules where the barrier to conformation interconversion is reasonably large (> ca. 10 kJ mol(-1)).