Premium
Resonance Raman spectrum of crystal violet
Author(s) -
Angeloni L.,
Smulevich G.,
Marzocchi M. P.
Publication year - 1979
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250080603
Subject(s) - raman spectroscopy , chemistry , crystal violet , resonance (particle physics) , crystal (programming language) , protonation , excitation , analytical chemistry (journal) , absorption spectroscopy , single crystal , photochemistry , ion , molecular physics , crystallography , optics , atomic physics , organic chemistry , physics , medicine , pathology , quantum mechanics , computer science , programming language
Abstract The preresonance Raman spectra, taken under various conditions, of crystal violet have been obtained using the exciting lines of an Ar + laser. The analysis of the Raman data and of the IR and UV visible absorption spectra allowed us to determine the structure of the ion (propeller‐like in shape with D 3 symmetry), to characterize the unstable single protonated dye cation, and to propose a detailed vibrational assignment in terms of coupled vibrations of the substituted benzenes. In addition, the measurements of the Raman excitation profiles furnished information on the vibronic couplings and provided evidence for a close correlation in the resonance mechanisms between crystal violet and benzene and its monosubstituted derivatives.