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Processing‐induced chromism in thin films of polythiophene derivatives
Author(s) -
Leclerc Mario,
Lévesque Isabelle,
Goldenberg Leonid,
Petty M. C.
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180816
Subject(s) - thermochromism , polythiophene , thin film , materials science , polymer , absorption (acoustics) , amphiphile , conjugated system , langmuir–blodgett film , photochemistry , chemical engineering , polymer chemistry , organic chemistry , nanotechnology , chemistry , conductive polymer , monolayer , composite material , copolymer , engineering
Langmuir‐Blodgett films of amphiphilic poly[3‐oligo(oxyethylene)‐4‐methylthiophene] have been obtained. The resulting thin films are poorly conjugated, with a maximum of absorption at 405 nm which remains almost constant upon heating or cooling. In contrast, cast thin films of this polymer exhibit a maximum of absorption at 550 nm and show interesting thermochromic effects. These results to indicate that the method of preparation of thin films can have a significant influence on the conformational structure of the polymer at room temperature and, consequently, on its thermochromic behaviour.