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Chromophores in Conjugated Polymers—All Straight?
Author(s) -
Lupton John M.
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100770
Subject(s) - chromophore , conjugated system , polymer , bent molecular geometry , macromolecule , rigidity (electromagnetism) , chemical physics , molecule , materials science , chemistry , photochemistry , organic chemistry , biochemistry , composite material
What is the physical shape of the π‐electron system in a large macromolecule such as a conjugated polymer? Although intuitively one may argue that any departure from rigidity by bending or twisting should disrupt conjugation, leading to the formation of discrete chromophores, single‐molecule and ensemble time‐resolved studies support the notion that the π‐bond is remarkably persistent in space: even individual chromophores can be bent and twisted, so that caution is warranted when interpreting a wide range of polarisation‐based spectroscopies.