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|Title: ||1,3-Di-amidoquinoline conjugate of calixarene (L) as a ratiometric and colorimetric sensor for Zn2+: Spectroscopy, microscopy and computational studies|
|Authors: ||MUMMIDIVARAPU, VVS|
|Issue Date: ||2012|
|Publisher: ||ROYAL SOC CHEMISTRY|
|Citation: ||DALTON TRANSACTIONS, 41(6)1671-1674|
|Abstract: ||Carboxamidoquinoline appended calixarene-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.|
|Appears in Collections:||Article|
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