Fluorescence Characteristics of Methoxycoumarins as Novel Fluorophores

Autor:	Shujiro Goya, Mitsuru Irikura, Akira Takadate, Chiyomi Murata, Toshinobu Masuda, Toshiharu Tanaka
Rok vydání:	1995
Předmět:	chemistry.chemical_compound Fluorophore chemistry Intramolecular force Intense fluorescence Fluorescence spectrometry Quantum yield Ring (chemistry) Photochemistry Coumarin Fluorescence Analytical Chemistry
Zdroj:	Analytical Sciences. 11:97-101
ISSN:	1348-2246 0910-6340
Popis:	The fluorescence characteristics of various methoxycoumarin fluorophores for the development of fluorescence reagents were examined in relation to their structures. The fluorescence emission mechanisms were also considered from the viewpoint of the intramolecular charge-transfer (CT) between methoxyl substituents and the coumarin ring. The arrangement of 6-methoxyl and 3-acetyl group pairs on the coumarin ring significantly contributed to the fluorescence enhancement through the intramolecular CT. We found that the structural features of methoxycoumarins required for intense fluorescence are to hold both diether bonds at the 6- and 7-positions and an electron-withdrawing group at the 3-position, as shown in 3-acetyl-6, 7-dimethoxycoumarin with 0.52 in quantum yield.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::796a0abb58a083aa174cfcd69d4d3cb7 https://doi.org/10.2116/analsci.11.97 Zobrazit plný text záznamu Full text from SpringerLink