Synthesis and Characterization of Mono-, Bis-, and Trissubstituted Pyridinium and Pyrylium Dyes
- 1 January 1992
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 65 (1) , 71-74
- https://doi.org/10.1246/bcsj.65.71
Abstract
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=CH– < –CH=N–.Keywords
This publication has 7 references indexed in Scilit:
- PHOTOREACTION OF CRYSTAL VIOLET IN SOLUTIONSen'i Gakkaishi, 1982
- The contribution of singlet oxygen to the photofading of triphenylmethane and related dyesDyes and Pigments, 1982
- Contribution of Singlet Oxygen to the Photofading of IndigoJournal of the Society of Dyers and Colourists, 1979
- DIRECT AND SENSITIZED PHOTOOXIDATION OF CYANINE DYESPhotochemistry and Photobiology, 1976
- Kinetics of the condensation of N-methyl-4-picolinium iodide with p-dimethylaminobenzaldehyde in aqueous ethanolThe Journal of Organic Chemistry, 1974
- Additions to Pyridinium Rings. II. Charge-Transfer Complexes as IntermediatesJournal of the American Chemical Society, 1956
- Über Distyrylpyrylium‐ und DistyrylpyridiniumsalzeHelvetica Chimica Acta, 1951