期刊
CHEMICAL PHYSICS LETTERS
卷 477, 期 4-6, 页码 298-303出版社
ELSEVIER
DOI: 10.1016/j.cplett.2009.07.013
关键词
-
资金
- Deutsche Forschungsgemeinschaft [SFB 749]
- NIH/ NIGMS [SC3GM084752]
Quantum efficiencies and ultrafast dynamics of the ring-closure and ring-opening reaction of a trifluorinated dicyclopropyl indolylfulgide with improved photostability are investigated by stationary and ultrafast absorption spectroscopy. The ring-closure reaction occurs on the time scale of 200 fs and is found to be temperature independent (T = 287-333 K). However, an activated behaviour is observed for the ring-opening reaction. A comparison with the corresponding non-substituted indolylfulgide shows that the dicyclopropyl group favours the open isomer via lower cyclisation and higher cycloreversion quantum efficiencies and faster dynamics of the ring-opening reaction. (C) 2009 Elsevier B. V. All rights reserved.
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