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Polytriarylamines with On‐Chain Crystal Violet Moieties
Author(s) -
Dumsch Ines,
Kudla Christof J.,
Scherf Ullrich
Publication year - 2009
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.200800557
Subject(s) - crystal violet , protonation , cationic polymerization , absorption (acoustics) , copolymer , photochemistry , absorption spectroscopy , crystal (programming language) , trifluoroacetic acid , materials science , side chain , polymer chemistry , chemistry , triarylmethane dye , organic chemistry , inorganic chemistry , polymer , optics , physics , medicine , ion , pathology , computer science , composite material , programming language
A novel polytriarylamine (PTAA)‐type alternating copolymer with on‐chain crystal violet moieties has been generated which shows the expected strong dependence of its UV‐Vis absorption spectrum from the pH value of the surrounding medium. Starting from the colorless leucocrystal violet form subsequent protonation/water elimination (by trifluoroacetic acid) leads to the formation of a blue colored, cationic copolymer with on‐chain crystal violet units that displays a characteristic Vis absorption band peaking at 627 nm. Further protonation leads to the generation of the corresponding dicationic species which is accompanied by a red shift of the long wavelength absorption maximum to 713 nm. The novel pH‐sensitive polytriarylamine derivatives will be investigated as potential p ‐type semiconductors for OFET (gas) sensors.