View : 14 Download: 0

Ratiometric fluorescence sensing of fluoride ions by an asymmetric bidentate receptor containing a boronic acid and imidazolium group

Title
Ratiometric fluorescence sensing of fluoride ions by an asymmetric bidentate receptor containing a boronic acid and imidazolium group
Authors
Xu Z.Kim S.K.Han S.J.Lee C.Kociok-Kohn G.James T.D.Yoon J.
Ewha Authors
이종목윤주영
SCOPUS Author ID
이종목scopus; 윤주영scopus
Issue Date
2009
Journal Title
European Journal of Organic Chemistry
ISSN
1434-193XJCR Link
Citation
no. 18, pp. 3058 - 3065
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The synthesis of the first examples of aoion receptors that utilize boron-fluoride interactions and (C-H) +-F∼-t:ype ionic hydrogen-bond interactions in. the binding of F ions is reported herein, o-, m-, and p-Phenylboronic acids were linked to naphthoimidazolium through a methylene group. On the basis of fluorescence and 19F NMR studies, we have confirmed that the addition of fluoride to a boron center occurs prior to the formation of (C-H) +-F∼-type ionic hydrogen bond with the imidazolium moiety. More importantly, these investigations have demonstrated that only the receptor bearing the oriho-directed. boron and imidazolium. exhibits enhanced fluoride binding. The increased binding ability of the asymmetric bidentate receptor of ortho-boronic acid, and imidazolium towards F - enables it to sense fluoride ions in a 95:5 CH 3CN/HEPES aqueous solution. The fluorescence responses to different anions were also explored; the orfho-boron-imidazolium receptor displayed ratiometric fluorescence changes and a high selectivity towards fluoride ions over other anions (Cl -, Br -, CH 3CO2 -, HSO4 - and H 2PO4 -). © Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009.
DOI
10.1002/ejoc.200900120
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE