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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1002/jcc.21651
|2 doi
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|a pubmed24n0672.xml
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Li, Guang-Yue
|e verfasserin
|4 aut
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|a A TD-DFT study on the cyanide-chemosensing mechanism of 8-formyl-7-hydroxycoumarin
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 04.05.2011
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|a Date Revised 25.11.2016
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2010 Wiley Periodicals, Inc.
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|a Proton transfer (PT) and excited-state PT process are proposed to account for the fluorescent sensing mechanism of a cyanide chemosensor, 8-formyl-7-hydroxycoumarin. The time-dependent density functional theory method has been applied to investigate the ground and the first singlet excited electronic states of this chemosensor as well as its nucleophilic addition product with cyanide, with a view to monitoring their geometries and spectrophotometrical properties. The present theoretical study indicates that phenol proton of the chemosensor transfers to the formyl group along the intramolecular hydrogen bond in the first singlet excited state. Correspondingly, the nucleophilic addition product undergoes a PT process in the ground state, and shows a similar structure in the first singlet excited state. This could explain the observed strong fluorescence upon the addition of the cyanide anion in the relevant fluorescent sensing mechanism
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cyanides
|2 NLM
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|a Environmental Pollutants
|2 NLM
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|a Fluorescent Dyes
|2 NLM
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|a Protons
|2 NLM
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|a Umbelliferones
|2 NLM
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|a 7-hydroxycoumarin
|2 NLM
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|a 60Z60NTL4G
|2 NLM
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| 700 |
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|a Zhao, Guang-Jiu
|e verfasserin
|4 aut
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1 |
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|a Han, Ke-Li
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Guo-Zhong
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of computational chemistry
|d 1984
|g 32(2011), 4 vom: 25. März, Seite 668-74
|w (DE-627)NLM098138448
|x 1096-987X
|7 nnns
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| 773 |
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|g volume:32
|g year:2011
|g number:4
|g day:25
|g month:03
|g pages:668-74
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|u http://dx.doi.org/10.1002/jcc.21651
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