2026-04-19T19:13:59Zhttps://recercat.cat/oai/requestoai:recercat.cat:2117/909172025-07-17T08:13:35Zcom_2072_1033col_2072_452950
Conformational changes in matrix-isolated 6-methoxyindole: Effects of the thermal and infrared light excitations
Lopes Jesus, A. J.
Reva, I.
Araujo-Andrade, Cuauhtemoc
Fausto, R.
Àrees temàtiques de la UPC::Física
Optics
infrared light
Òptica
Conformational changes induced thermally or upon infrared excitation of matrix-isolated
6-methoxyindole were investigated. Narrowband near-infrared excitation of the first overtone of
the N–H stretching vibration of each one of the two identified conformers is found to induce a
selective large-scale conversion of the pumped conformer into the other one. This easily controllable
bidirectional process consists in the intramolecular reorientation of the methoxy group and allowed a
full assignment of the infrared spectra of the two conformers. Matrices with different conformational
compositions prepared by narrow-band irradiations were subsequently used to investigate the effects
of both thermal and broadband infrared excitations on the conformational mixtures. Particular
attention is given to the influence of the matrix medium (Ar vs. Xe) and conformational effects of
exposition of the sample to the spectrometer light source during the measurements.
Peer Reviewed
Postprint (author's final draft)
2016-03-25
Article
http://scitation.aip.org/content/aip/journal/jcp/144/12/10.1063/1.4944528
007630/QUI/UI0313/2013
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Open Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
AIP