The Influence of Asymmetric Charge Transfer on IR Spectra of Excited Quadrupole Molecules

The influence of symmetry breaking caused by charge transfer in excited quadrupole molecules of the D-π-A-π-D or A-π-D-π-A type, where A and D are the electron-acceptor and electron-donor groups, respectively, on spectra of characteristic vibrations is investigated. Types of possible changes in IR s...

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Bibliographic Details
Published in:Optics and spectroscopy 2020-11, Vol.128 (11), p.1707-1714
Main Authors: Tkachev, V. G., Ivanov, A. I.
Format: Article
Language:English
Subjects:
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Spectroscopy and Physics of Atoms and Molecules
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Summary:The influence of symmetry breaking caused by charge transfer in excited quadrupole molecules of the D-π-A-π-D or A-π-D-π-A type, where A and D are the electron-acceptor and electron-donor groups, respectively, on spectra of characteristic vibrations is investigated. Types of possible changes in IR spectra with increase in molecule’s asymmetry are classified within the earlier developed theory of symmetry breaking and its manifestation in nonstationary IR spectra. Physical interpretation of the revealed trends is presented, and the latter are compared with currently available experimental data.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X20110260