Synthesis and Characterization of Mono-, Bis-, and Trissubstituted Pyridinium and Pyrylium Dyes.

…, S Kawamura, K Shibata, H Muramatsu

文献索引：Matsui, Masaki; Kawamura, Shigeo; Shibata, Katsuyoshi; Muramatsu, Hiroshige Bulletin of the Chemical Society of Japan, 1992 , vol. 65, # 1 p. 71 - 74

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被引用次数: 27

摘要

A series of mono-, bis-, and trissubstituted pyridinium and pyrylium dyes have been synthesized by the condensation of methylpyridinium and methylpyrylium salts with aldehydes or nitroso compound. Large bathochromic shifts were observed in the following order, both in substituted azomethine pyridinium and pyrylium dyes, mono< bis< tris. The magnitude of the shift appeared in the order of multiple bonds,–CH= CH–<–CH= CH–CH= ...