| Autor: |
Mummidivarapu VV; Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400 076, India., Tabbasum K, Chinta JP, Rao CP |
| Jazyk: |
angličtina |
| Zdroj: |
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2012 Feb 14; Vol. 41 (6), pp. 1671-4. Date of Electronic Publication: 2011 Dec 20. |
| DOI: |
10.1039/c2dt11900e |
| Abstrakt: |
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 Zn(2+) up to a lowest concentration of 183 ± 18 ppb (2.82 μM) 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 Zn(2+) 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 Zn(2+) and hence these two can be easily differentiated. Even the features observed in AFM can distinctly differentiate L from its Zn(2+) complex. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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