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Selective recognition of Zn(2+) by salicylaldimine appended triazole-linked di-derivatives of calix[4]arene by enhanced fluorescence emission in aqueous-organic solutions: role of terminal -CH(2)OH moieties in conjunction with the imine in recognition

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Title Selective recognition of Zn(2+) by salicylaldimine appended triazole-linked di-derivatives of calix[4]arene by enhanced fluorescence emission in aqueous-organic solutions: role of terminal -CH(2)OH moieties in conjunction with the imine in recognition
 
Creator PATHAK, RK
IBRAHIM, SM
RAO, CP
 
Subject transition-metal ions
intracellular zinc
biological-systems
electron-transfer
in-vivo
sensor
design
zn(ii)
probe
chemosensor
triazole-linked schiff's base appended 1,3-di-derivatives of calix[4]arene
selective recognition of zn(2+)
fluorescence enhancement
augmentation of fluorescence response by -ch(2)oh
 
Description A series of lower rim 1,3-di-derivatives possessing Schiff's base cores were synthesized using triazole unit as linker moiety by further introducing butyl (L(2)), one -CH(2)CH (L(3)) and two -CH(2)OH (L(4))-containing moieties, respectively, in order to bring additional support for ion binding. Based on fluorescence and absorption spectroscopies it has been shown that Zn(2+) Could be selectively recognized by the Schiff's base core and not by the triazole core among the ten metal ions studied both in methanol and in aqueous Solutions of methanol and acetonitrile, wherein the -CH(2)OH moieties augment the fluorescence response by providing additional coordinations to the Zn(2+). Thus L(4) exhibited a fluorescence enhancement of similar to 65, similar to 48 and similar to 25-fold in methanol. aqueous Solutions of methanol and acetonitrile. with minimum detection limits of 174. 3 13 and 320 ppb, respectively. Both the excitation and emission wavelengths fall in visible region. (C) 2009
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-26T11:01:18Z
2011-12-26T12:57:24Z
2011-12-27T05:40:22Z
2011-08-26T11:01:18Z
2011-12-26T12:57:24Z
2011-12-27T05:40:22Z
2009
 
Type Article
 
Identifier TETRAHEDRON LETTERS, 50(23), 2730-2734
0040-4039
http://dx.doi.org/10.1016/j.tetlet.2009.03.126
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11284
http://hdl.handle.net/10054/11284
 
Language en