Intermolecular excited state double proton transfer in dipyridocarbazole:alcohol complexes

被引：44

作者：

Herbich, J ^{[1
]}

Dobkowski, J ^{[1
]}

Thummel, RP ^{[1
]}

Hegde, V ^{[1
]}

Waluk, J ^{[1
]}

机构：

[1] UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1997年 / 101卷 / 33期

关键词：

D O I：

10.1021/jp970885+

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：

Addition of alcohols to solutions of dipyrido[2,3-a:3',2'-i]carbazole leads to fluorescence quenching and to the appearance of a new, strongly red-shifted fluorescence band. This new band is interpreted in terms of excited state double proton transfer in dipyridocarbazole:alcohol complexes. This conclusion is supported by the results of transient picosecond absorption studies and the calculations performed for the intitial and tautomeric forms. Two different precursors of the tautomer are identified: in one of them, the reaction occurs through a barrier, while in the other, phototautomerization proceeds even at low temperatures.

引用

页码：5839 / 5845

页数：7

共 68 条

[51] FEMTOSECOND PICOSECOND LASER PHOTOLYSIS STUDIES ON THE MECHANISMS OF FLUORESCENCE QUENCHING INDUCED BY HYDROGEN-BONDING INTERACTIONS - 1-PYRENOL-PYRIDINE SYSTEMS [J].