Ali, Amjad ; Joseph, Roymon ; Mahieu, Bernard ; Rao, Chebrolu P. (2010) Synthesis and characterization of a (1+1) cyclic Schiff base of a lower rim 1,3-diderivative of p-tert-butylcalix[4]arene and its complexes of VO2+, UO2+2, Fe3+, Ni2+, Cu2+ and Zn2+ Polyhedron, 29 (3). pp. 1035-1040. ISSN 0277-5387
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.poly.2009.12.020
Abstract
A (1+1) macrocyclic calix[4]arene based Schiff base derivative has been synthesized and was subjected to complexation with different ions or ionic species, viz., VO2+, UO2+2, Fe3+, Ni2+, Cu2+ and Zn2+. Both the conjugate and the complexes were characterized using various spectral techniques, viz.; FTIR, 1H, 13C NMR and FAB mass. The complexes have been further characterized by UV-Vis, EPR and magnetic susceptibility, while the iron complex was studied further by Mössbauer spectroscopy. On the basis of all these studies, the VO2+ and UO2+2 complexes were found to be mononuclear, whereas all the other complexes were found to be dinuclear. Based on the studies, the iron complex was found have a distorted octahedral high spin Fe(III) center with an antiferromagnetically coupled dinuclear core in the complex.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Calix[4]arene Based Schiff Base; Metal Complex; Mössbauer Spectroscopy; EPR Spectroscopy |
| ID Code: | 79192 |
| Deposited On: | 24 Jan 2012 15:31 |
| Last Modified: | 19 Apr 2012 06:44 |
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