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Vibronic couplings in vibrational spectra of the non‐centrosymmetric 2‐naphthol crystal. Comparative study of IR, Raman and inelastic incoherent neutron scattering spectra
Author(s) -
Szostak M. M.,
Natkaniec I.
Publication year - 1989
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.1250200805
Subject(s) - raman spectroscopy , inelastic neutron scattering , chemistry , vibronic coupling , crystal (programming language) , inelastic scattering , molecular vibration , spectral line , intramolecular force , molecular physics , raman scattering , atomic physics , analytical chemistry (journal) , crystallography , scattering , optics , molecule , physics , stereochemistry , organic chemistry , astronomy , computer science , programming language
The polarized IR and Raman spectra of 2‐naphthol as a single crystal, in solution and as a KBr pellet or powder, and the inelastic incoherent neutron scattering spectra of the powder were measured and compared with the corrresponding naphthalene spectra. The previous assignments of fundamental vibrations were confirmed, except for the in‐plane and out‐of‐plane OH bending modes in the crystal. The medium‐dependent relative intensities and frequencies of the vibrational bands are interpreted in terms of the competition between an intramolecular charge transfer interacting with vibrations (vibronic coupling) and hydrogen bonding.