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  On the viscosity effects in proton transfer systems. Structure and photophysics of 2-(2′-hydroxy-5′-methylphenyl)-3,3-dimethylindole.

Mordzinski, A., Lipkowski, J., Orzanowska, G., & Tauer, E. (1990). On the viscosity effects in proton transfer systems. Structure and photophysics of 2-(2′-hydroxy-5′-methylphenyl)-3,3-dimethylindole. Chemical Physics, 140(1), 167-176. doi:10.1016/0301-0104(90)89057-W.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-0E7B-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-3863-7
Genre: Journal Article

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603075.pdf (Publisher version), 846KB
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Mordzinski, A., Author
Lipkowski, J., Author
Orzanowska, G., Author
Tauer, E.1, Author              
Affiliations:
1Department of Spectroscopy and Photochemical Kinetics, MPI for biophysical chemistry, Max Planck Society, ou_578624              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 1990-01-01
 Publication Status: Published in print
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 Rev. Method: Peer
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Title: Chemical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 140 (1) Sequence Number: - Start / End Page: 167 - 176 Identifier: ISSN: 0301-0104