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Fluorescence switch-on sensor for Cu2+ by an amide linked lower rim 1,3-bis(2-picolyl)amine derivative of calix[4]arene in aqueous methanol

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Title Fluorescence switch-on sensor for Cu2+ by an amide linked lower rim 1,3-bis(2-picolyl)amine derivative of calix[4]arene in aqueous methanol
 
Creator JOSEPH, ROYMON
RAMANUJAM, BALAJI
ACHARYA, AMITABHA
RAO, CHEBROLU P
 
Subject fluorescence
spectroscopy
methanol
fluorescence spectroscopy
 
Description A highly selective fluorescence switch on sensor, L for detecting Cu2+ has been synthesized by introducing a bis-(2-picolyl)amine moiety at the lower rim of a calix[4]arene platform via amide linkage. Binding properties of L toward ten different biologically relevant Mn+ ions have been studied by fluorescence and absorption spectroscopy in methanol and aqueous methanol. L was found to detect Cu2+ selectively down to a concentration of 196 and 341 ppb, respectively, in methanol and 1:1 aqueous methanol even in the presence of other metal ions. The composition of the complex has been found to be 1:1 based on the Job plot and is further confirmed by ESI MS. The role of calix[4]arene platform as well as the pre-organized binding core in the selective recognition of Cu2+ has been demonstrated by studying appropriate reference molecules. The possible modes of binding of L with Cu2+ have been modeled by computational calculations. L and its Cu2+ complex could very well be differentiated based on the nano-structural features observed in SEM and AFM.
 
Publisher Elsevier
 
Date 2009-10-06T03:56:48Z
2011-11-25T15:40:11Z
2011-12-26T13:05:05Z
2011-12-27T05:51:02Z
2009-10-06T03:56:48Z
2011-11-25T15:40:11Z
2011-12-26T13:05:05Z
2011-12-27T05:51:02Z
2009
 
Type Article
 
Identifier Tetrahedron Letters 50(23), 2735-2739
0040-4039
http://dx.doi.org/10.1016/j.tetlet.2009.03.109
http://hdl.handle.net/10054/1691
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1691
 
Language en