Detalhes do Documento

Vibrational spectroscopy of cis- and trans-formic acid in solid argon

Autor(es): Maçôas, Ermelinda M. S. cv logo 1 ; Lundell, Jan cv logo 2 ; Pettersson, Mika cv logo 3 ; Khriachtchev, Leonid cv logo 4 ; Fausto, Rui cv logo 5 ; Räsänen, Markku cv logo 6

Data: 2003

Identificador Persistente: http://hdl.handle.net/10316/5162

Origem: Estudo Geral - Universidade de Coimbra


Descrição
Absorption spectra of cis and trans conformers of formic acid (HCOOH) isolated in solid argon are analyzed in the mid-infrared (4000-400 cm-1) and near-infrared (7800-4000 cm-1) regions. The HCOOH absorption spectrum reveals matrix-site splitting for the trapped molecule. Narrowband tunable infrared radiation is used to pump a suitable vibrational transition of the trans conformer in order to promote site-selectively the conversion to the cis conformer and separate the spectral features of each site group. Several anharmonic resonances are identified for both conformers. The results of anharmonic vibrational ab initio calculations (CC-VSCF) for the trans and cis conformers of formic acid are reported and compared with the experimental spectra. http://www.sciencedirect.com/science/article/B6WK8-487MY9S-3/1/3eb81a0b647bf4b929f70442d36efba5
Tipo de Documento Artigo
Idioma Inglês
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