Dual fluorescence of 4-dimethylaminopyridine and its derivatives - Effects of methyl substitution at the pyridine ring

被引：32

作者：

Mishina, S

Takayanagi, M

Nakata, M

Otsuki, J

Araki, K

机构：

[1] Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan

[2] Univ Tokyo, Inst Ind Sci, Minato Ku, Tokyo 1068558, Japan

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2001年 / 141卷 / 2-3期

关键词：

intramolecular charge transfer; dual fluorescence; solvent effect; dimethylaminopyridines;

D O I：

10.1016/S1010-6030(01)00456-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electronic absorption and emission spectra of 4-(dimethylamino)pyridine (DMAP). 3-methyl-4-(dimethylamino)pyridine (MDMAP), and 3,5-dimethyl-4-(dime thylamino)pyridine (TMAP = tetramethylaminopyridine) were measured in cyclohexane (nonpolar). chloroform (medium polar), and acetonitrile (highly polar) solutions. Intense charge transfer emission of DMAP was observed only in acetonitrile, while that of MDMAP and TMAP was observed in all the three solvents. Dynamics of excited electronic states of these molecules is discussed on the basis of steric hindrance between methyl groups at 3- and 5-positions of pyridine ring and dimethylamino groups. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：153 / 158

页数：6

共 36 条

[1]

[Anonymous], 1986, ANGEW CHEM INT EDIT, DOI DOI 10.1002/ANGE.19610732103

[2] Design of a fluorescent host for monitoring multiple hydrogen-bonding interaction directly by intramolecular charge-transfer emission [J].