Donor's position-specific channel interference in substituted biphenyl molecules

The channel interference mechanism describes the two-photon absorption process in terms of the relative orientations of different transition dipole moment vectors (TDMVs) in a molecule. Controlling these interferences is a difficult but important task, because it can provide new information about su...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2015-07, Vol.17 (27), p.17571-17576
Main Author: Mehboob Alam, Md
Format: Article
Language:English
Subjects:
Channels
Dipole moment
Interference
Mathematical analysis
Orientation
Physical chemistry
Tasks
Vectors (mathematics)
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Summary:The channel interference mechanism describes the two-photon absorption process in terms of the relative orientations of different transition dipole moment vectors (TDMVs) in a molecule. Controlling these interferences is a difficult but important task, because it can provide new information about such absorption/emission processes. The present contribution aims to explain the reversal in the nature of these interferences with the relative positions of the donor-acceptor groups in substituted biphenyl molecules. The results obtained from the linear and quadratic response theories indicate that having the donor at the para position leads to a constructive interference whereas having it at any of the other two positions results in a destructive interference. This is explained by a systematic analysis of the relative orientations of all the TDMVs involved in a three-state model.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp02492g