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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/15112

Title: 1,3-Di-amidoquinoline conjugate of calix[4]arene (L) as a ratiometric and colorimetric sensor for Zn2+: Spectroscopy, microscopy and computational studies
Authors: MUMMIDIVARAPU, VVS
TABBASUM, K
CHINTA, JP
RAO, CP
Issue Date: 2012
Publisher: ROYAL SOC CHEMISTRY
Citation: DALTON TRANSACTIONS, 41(6)1671-1674
Abstract: Carboxamidoquinoline appended calix[4]arene-1,3-di-conjugate (L) has been synthesized and characterized and its single crystal XRD structure has been established. L has been shown to act as selective ratiometric turn-on fluorescence sensor for Zn2+ up to a lowest concentration of 183 +/- 18 ppb (2.82 mu M) with a nine-fold enhancement by exhibiting blue-green emission. The coordination features of the species of recognition have been computationally evaluated by DFT methods and found to have distorted tetrahedral Zn2+ center in an N-4 core. The spherical nano-structural features observed for L in TEM are being transformed into the Koosh nano-flower like structure when complexed with Zn2+ and hence these two can be easily differentiated. Even the features observed in AFM can distinctly differentiate L from its Zn2+ complex.
URI: http://dx.doi.org/10.1039/c2dt11900e
http://dspace.library.iitb.ac.in/jspui/handle/100/15112
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