Ground- and excited-state intramolecular proton transfer in 3,5-dibromosalicylic acid

被引：12
|
作者：
Ibañez, GA [1 ]
Labadié, G [1 ]
Escandar, GM [1 ]
Olivieri, AC [1 ]
机构：
[1] Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, Dept Quim Analit, RA-2000 Rosario, Santa Fe, Argentina
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2003年 / 645卷 / 01期
关键词：
luminescence; intramolecular proton transfer; MO calculations; 3,5-dibromosalicylic acid;
D O I：
10.1016/S0022-2860(02)00542-2
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：
The existence of both ground- and excited-state proton transfer equilibrium between the enolic and keto tautomers. of 3,5-dibromosalicylic acid has been investigated in aqueous solution using electronic absorption and luminescence emission spectroscopies, together with ab initio and semiempirical MO/CI calculations. The compound provides an example of a room temperature phosphorescence triplet-state emission from a phototautomer (ketonic) form. The interference from radiationless paths, which may in principle avoid the observation of the phosphorescence signal, was overcome by using a protective micellar medium and the presence of an external heavy atom. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：61 / 68
页数：8
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