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Distortion of Excited Molecules in Organic Solids
Author(s) -
Hochstrasser Robin M.,
Wiersma Douwe A.
Publication year - 1972
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197200050
Subject(s) - chemistry , pyrazine , distortion (music) , context (archaeology) , excited state , spectral line , vibronic coupling , crystal (programming language) , molecule , coupling (piping) , field (mathematics) , symmetry (geometry) , chemical physics , emission spectrum , computational chemistry , atomic physics , quantum mechanics , organic chemistry , physics , optoelectronics , mathematics , cmos , amplifier , computer science , engineering , biology , paleontology , geometry , programming language , mechanical engineering , pure mathematics
In this paper we present some ideas concerning the role of the crystal field in stabilizing dynamically distorted electronic states of aromatics. It is shown that a crystal field term of appropriate symmetry reveals in a dramatic way the result of strong vibronic coupling in emission spectra. Conditions under which these distortions are bound to occur are discussed with an emphasis on qualitative understanding. In this context the role of predissociating modes in spectra of aromatics is touched upon and the ideas are demonstrated through discussions of the emission spectra of pyrazine, p ‐dibromobenzene and m ‐dichloropyrazine.