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Synthesis and Structure of New Cationic Squarylium Dyes
Author(s) -
Nakazumi Hiroyuki,
Natsukawa Kazuki,
Nakai Kazuhisa,
Isagawa Kakuzo
Publication year - 1994
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199410011
Subject(s) - chromophore , squaric acid , cationic polymerization , chemistry , photochemistry , absorption (acoustics) , polymer chemistry , organic chemistry , materials science , composite material
Absorption maxima shifted to the near IR region are observed for the cations 1 . These cations can be synthesized by the reaction of benzothiazolium iodides and squaric acid in the ratio 3:2 without the addition of a base. The chromophore of 1 is a polymethine chromophore and not a triarylmethane one. R = Bu, Pr, Et.
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