ChemInform Abstract: Syntheses and Photophysical Properties of Some 4-Arylpyridinium Salts

Autor:	Joel M. Kauffman, Charles J. Kelley, Wiranto Budisusetyo, Yuanxi Qin, Alem Ghiorghis, Kwabena Ansu
Rok vydání:	2010
Předmět:	chemistry.chemical_compound Dye laser Sulfonate chemistry Aryl Intense fluorescence Aromatization Excited state intramolecular proton transfer General Medicine Photochemistry Fluorescence Lasing threshold
Zdroj:	ChemInform. 32
ISSN:	1522-2667 0931-7597
DOI:	10.1002/chin.200126134
Popis:	A number of 4-arylpyridines, many methoxy substituted, were prepared by an efficient two-step method involving aryl Grignard addition to 1-methyl-4-piperidone and direct aromatization of the resulting 4-aryl-4-piperidinols. The pyridines were N-alkylated to give sulfonate salts desired for their fluorescent properties. Study of selected compounds as laser dyes revealed several structures to be efficient dyes lasing in the 530-550 nm range. Two new diazaquaterphenyls were prepared and were quaternized. These salts exhibited intense fluorescence in the 420-450 nm range, but would not lase. A phenolic azaterphenyl suitably substituted for excited state intramolecular proton transfer (ESIPT) did not fluoresce at all.
Databáze:	OpenAIRE
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