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  On the barrier to excited-state intramolecular proton transfer (ESIPT): The controversial assignment of the spectra of 2,5-bis(2-benzoxazolyl)hydroquinone in solid argon.

Dick, B. (1989). On the barrier to excited-state intramolecular proton transfer (ESIPT): The controversial assignment of the spectra of 2,5-bis(2-benzoxazolyl)hydroquinone in solid argon. Chemical Physics Letters, 158(1-2), 37-44. doi:10.1016/0009-2614(89)87290-2.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-44EF-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-44F2-6
Genre: Journal Article

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 Creators:
Dick, B.1, Author              
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1Abteilung Laserphysik, MPI for biophysical chemistry, Max Planck Society, ou_578547              

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 Abstract: The spectra of 2,5-bis(2-benzoxazolyl)hydroquinone (BBXHQ) in solid argon at 15 K reveals two species. The major species (96%) undergoes very efficient excited-state intramolecular proton transfer (ESIPT) after excitation to S1. It is assigned to the isolated BBXHQ molecule (solvated by argon atoms) in which ESIPT is not thermally activated. Either no energy barrier exists or it can be overcome by proton tunneling with a rate constant greater than 8 × 1010 s−1. The minor species produces only fluorescence with a normal Stokes shift, indicating the absence of ESIPT. It is tentatively assigned to a dimer of BBXHQ.

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Language(s): eng - English
 Dates: 1989-06-02
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1016/0009-2614(89)87290-2
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Title: Chemical Physics Letters
Source Genre: Journal
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Pages: - Volume / Issue: 158 (1-2) Sequence Number: - Start / End Page: 37 - 44 Identifier: -