ON THE VISCOSITY EFFECTS IN PROTON-TRANSFER SYSTEMS, STRUCTURE AND PHOTOPHYSICS OF 2-(2'-HYDROXY-5'-METHYLPHENYL)-3,3-DIMETHYLINDOLE

被引：16

作者：

MORDZINSKI, A ^{[1
]}

LIPKOWSKI, J ^{[1
]}

ORZANOWSKA, G ^{[1
]}

TAUER, E ^{[1
]}

机构：

[1] MAX PLANCK INST BIOPHYS CHEM,SPEKTROSKOPIE ABT,W-3400 GOTTINGEN,GERMANY

来源：

CHEMICAL PHYSICS | 1990年 / 140卷 / 01期

关键词：

D O I：

10.1016/0301-0104(90)89057-W

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：

Temperature effects on fluorescence quantum yields and lifetimes of 2-(2′-hydroxy-5′-methylphenyl)-3,3-dimethylindole (HBDMI) and 2-(2′-hydroxyphenyl)benzoxazole (HBO) in the series of hydrocarbons were studied. The results obtained allowed us to examine the role of the viscosity in the electronically excited proton transfer (PT) systems. The large-amplitude torsional motions operate in the initially excited and PT forms. The X-ray determination of the crystal structure revealed that HBDMI is distorted from planarity in the crystalline state. We propose that solvent frictional forces effectively hinder the formation of the coplanar structure required for the barrierless proton transfer in the excited state. © 1990.

引用

页码：167 / 176

页数：10

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