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  Intramolecular proton transfer and tunnel effects in the metastable triplet states of 2-(2′-hydroxyphenyl)benzoxazole studied by micro- and nanosecond laser flash photolysis.

Grellmann, K. H., Mordziński, A., & Heinrich, A. (1989). Intramolecular proton transfer and tunnel effects in the metastable triplet states of 2-(2′-hydroxyphenyl)benzoxazole studied by micro- and nanosecond laser flash photolysis. Chemical Physics, 136(2), 201-211. doi:10.1016/0301-0104(89)80047-3.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-2E8B-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-2E90-0
Genre: Journal Article

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Grellmann, K. H.1, Author              
Mordziński, A., Author
Heinrich, A.1, Author              
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1Department of Spectroscopy and Photochemical Kinetics, MPI for biophysical chemistry, Max Planck Society, ou_578624              

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 Abstract: The enol-keto tautomerism of 2-(2′-hydrophenyl)benzoxazole (HBO) in its metastable triplet states has been studied in fluid, non-polar solution. After laser flash excitation the keto triplet state is populated with high efficiency. The establishment of a ketoenol equilibrium was observed between 55 and 220 K. At low temperatures the rate of this reaction is determined by tunnel effects. The barrier height of the proton transfer is in the triplet state much larger than in the singlet state.

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Language(s): eng - English
 Dates: 2002-01-111989-09-15
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1016/0301-0104(89)80047-3
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Title: Chemical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 136 (2) Sequence Number: - Start / End Page: 201 - 211 Identifier: -