Open AccessDifferent Polymorphic Modifications of Phenyl Salicylate
Author(s) -
N.A. Davydova,
V.I. Melnik,
V.V. Nesprava,
V.Ya. Reznichenko
Publication year - 2012
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe57.2.140
Subject(s) - luminescence , metastability , ring (chemistry) , excitation , spectral line , vibronic spectroscopy , spectroscopy , infrared spectroscopy , molecule , phase (matter) , materials science , infrared , chemistry , physics , optics , organic chemistry , optoelectronics , quantum mechanics , astronomy
For the first time, the luminescence spectra of two polymorphic forms of phenyl salicylate (salol) have been obtained. Both spectra show the vibronic structure. The average spacing between vibronic components is 1250 cm–1. Based on the infrared spectroscopy study, it is concluded that the interval between vibronic components in the luminescence spectra corresponds to the ν(C–OH) stretching vibration. The luminescence spectrum of the metastable phase is shifted by 760 cm–1 to the low-frequency side and is much wider relative to that in the stable phase. The presence of an OH group in the orto-position on the substituted ring results in the asymmetry of a molecule and the localization of an electronic excitation on this ring.