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Preparation of azapyrylocyanine dyes
Author(s) -
Reynolds G. A.,
Vanallan J. A.
Publication year - 1977
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570140401
Subject(s) - chemistry , perchlorate , amine gas treating , absorption (acoustics) , tertiary amine , photochemistry , organic chemistry , ion , optics , physics
Azapyrylocyanine and thiopyrylocyanine dyes were prepared from a 4‐aminopyrylium or 4‐aminothiopyrylium perchlorate and a 4‐methoxypyrylium or thiopyrylium perchlorate in the presence of a tertiary amine. The Absorption spectra of these dyes was shifted 107–125 mm to shorter wavelength compared to the corresponding methine dyes.