Direct observation of a 220 cm(-1) structure in the lowest pi-pi* absorption band in the vapour phase of trans-azobenzene

Authors
Biancalana, A Campani, E Di Domenico, G Gorini, G Iacoponi, A Masetti, G
Citation
A. Biancalana et al., Direct observation of a 220 cm(-1) structure in the lowest pi-pi* absorption band in the vapour phase of trans-azobenzene, SPECT ACT A, 55(14), 1999, pp. 2883-2887
Citations number
22
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
ISSN journal
13861425 → ACNP
Volume
55
Issue
14
Year of publication
1999
Pages
2883 - 2887
Database
ISI
SICI code
1386-1425(199912)55:14<2883:DOOA2C>2.0.ZU;2-K
Abstract
In this work we present the first direct observation of a 220 cm(-1) progre ssion in the absorption spectrum of trans-azobenzene in the vapour phase. T he mode at 220 cm(-1) is essential to explain both the electronic absorptio n spectrum and the Raman excitation profiles of the most intense Raman band s of trans-azobenzene in the 1000-1600 cm(-1) shift range. Our data in the vapour phase assure that this frequency pertains to an internal molecular m ode. (C) 1999 Elsevier Science B.V. All rights reserved.