Ratiometric fluorescence off-on-off sensor for Cu2+ in aqueous buffer by a lower rim triazole linked benzimidazole conjugate of calix[4]arene
DSpace at IIT Bombay
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Title |
Ratiometric fluorescence off-on-off sensor for Cu2+ in aqueous buffer by a lower rim triazole linked benzimidazole conjugate of calix[4]arene
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Creator |
PATHAK, RK
HINGE, VK MONDAL, P RAO, CP |
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Subject |
NEUROLOGICAL DISORDERS
SELECTIVE RECOGNITION COPPER DEFICIENCY EXCIMER FORMATION OXIDATIVE STRESS LIVING CELLS ION CHEMOSENSOR DERIVATIVES ZN2+ |
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Description |
A benzimidazole appended triazole linked 1,3-diconjugate of calix[4] arene (L) has been synthesized and characterized. The conjugate L has been found to recognize Cu2+ among the thirteen different metal ions studied by exhibiting ratiometric fluorescence changes through newly generated excimer band at similar to 380 nm. Fluorescence off-on-off behavior has been clearly demonstrated on the basis of the binding variability of Cu2+ to L. The binding has been elicited through the changes observed in the fluorescence, ESI MS and H-1 NMR titrations. All the other metal ions studied do not show any new band and further do not interfere with the recognition of Cu2+ by L, even when these are present in the same medium. The structural features of both the mono- and di-nuclear complexes were established by DFT computational calculations and found to display highly distorted geometry about the copper centers that deviate from both the tetrahedral and the square planar.
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Publisher |
ROYAL SOC CHEMISTRY
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Date |
2014-10-15T13:21:32Z
2014-10-15T13:21:32Z 2012 |
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Type |
Article
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Identifier |
DALTON TRANSACTIONS, 41(35)10652-10660
http://dx.doi.org/10.1039/c2dt30432e http://dspace.library.iitb.ac.in/jspui/handle/100/14991 |
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Language |
en
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