In this work we present the first direct observation of a 220 cm-1 progression in the absorption spectrum of trans-azobenzene in the vapour phase. The mode at 220 cm-1 is essential to explain both the electronic absorption spectrum and the Raman excitation profiles of the most intense Raman bands 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 mode.
Direct observation of a 220 cm(-1) structure in the lowest pi-pi* absorption band in the vapour phase of trans-azobenzene
DI DOMENICO, Giovanni;
1999
Abstract
In this work we present the first direct observation of a 220 cm-1 progression in the absorption spectrum of trans-azobenzene in the vapour phase. The mode at 220 cm-1 is essential to explain both the electronic absorption spectrum and the Raman excitation profiles of the most intense Raman bands 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 mode.File in questo prodotto:
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