A highly copper selective chromogenic calix[4]arene derivative

In this article, copper selective complexation behavior of 5,11,17,23-tetrakis[( N , N -dicyclohexylamino)methyl]-25,26,27,28-tetrahydroxycalix[4]arene ( 4 ) has been explored. Besides this, the binding ability of 4 toward different metal ions such as Cd 2+ , Co 2+ , Cu 2+ , Hg 2+ , Ni 2+ , Pb 2+ an...

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Bibliographic Details
Published in:New journal of chemistry 2010-01, Vol.34 (11), p.2579-2586
Main Authors: Qazi, Mansoor Ahmed, Qureshi, Imdadullah, Memon, Shahabuddin
Format: Article
Language:English
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Summary:In this article, copper selective complexation behavior of 5,11,17,23-tetrakis[( N , N -dicyclohexylamino)methyl]-25,26,27,28-tetrahydroxycalix[4]arene ( 4 ) has been explored. Besides this, the binding ability of 4 toward different metal ions such as Cd 2+ , Co 2+ , Cu 2+ , Hg 2+ , Ni 2+ , Pb 2+ and Zn 2+ has been investigated by UV-visible and fluorescence spectroscopies. The chromoionophore 4 shows pronounced selectivity for Cu 2+ even in the presence of other metal ions. The results reveal that Cu 2+ forms 1   1 host-guest complex with 4 . The FT-IR spectroscopic method has also been applied for further confirmation of complex formation between 4 and Cu 2+ and found to be satisfactory. The synthesized ligand 4 was found to be selective toward Cu 2+ among a series of selected metal ions, which may be due to the compatibility between the metal and ligand. Moreover, ionic radii, nature, number of binding sites, cavity size and geometry of 4 play an important role in selective complexation.
ISSN:1144-0546
1369-9261
DOI:10.1039/c0nj00396d