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Barrier for excited-state intramolecular proton transfer and proton tunneling in bis-2,5-(2-benzoxazolyl)-hydroquinone

✍ Scribed by U. Brackmann; N. Ernsting; D. Ouw; K. Schmitt

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
517 KB
Volume
110
Category
Article
ISSN
0009-2614

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✦ Synopsis

The exiration spccrra of dual fluoresccncc for isolated bis-2.5(2-benzo\xolyl)-hydroquinone at IOU remperaturrs in a supersonic jet is reported. The vibronic structure near the electronic origin for the 4 10 run band is attributed to proton transfer. Proton trmsfcr WBS observed for the vibrationally

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The spectra of 2,5-bis( 2-benzoxazolyl)hydroquinone (BBXHQ) in solid argon at IS K reveals two species. The major species (96%) undergoes very efficient excited-state intramolecular proton transfer (ESIPT) after excitation to S,. It is assigned to the isolated BBXHQ molecule (solvated by argon atoms