Joseph, Roymon ; Chinta, Jugun Prakash ; Rao, Chebrolu P. (2010) Benzothiazole appended lower rim 1,3-di-amido-derivative of calix[4]arene: synthesis, structure, receptor properties towards Cu2+, iodide recognition and computational modeling Inorganica Chimica Acta, 363 (12). pp. 2833-2839. ISSN 0020-1693
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.ica.2010.04.005
Abstract
A new molecular fluorescent sensor (L) for Cu2+ has been synthesized by derivatizing the lower rim of calix[4]arene with benzothiazole moiety, through amide linkage to result in 1,3-di-derivative. The receptor molecule, L exhibited fluorescence quenching towards Cu2+ among eleven divalent ions, viz., Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Ca2+, Mg2+ and Pb2+, studied. The 1:1 stoichiometry of the complex formed between L and Cu2+ has been demonstrated by electronic absorption and ESI-MS. The role of calix[4]arene for the selective sensing of Cu2+ has been established by comparing the data with that obtained for an appropriate control molecule. The minimum concentration at which L can detect Cu2+ has been found to be 403 ppb. The computations carried out at DFT level have provided the coordination and structural features of the Cu2+ complex of L as species of recognition. The Cu2+ complex thus formed recognizes iodide by bringing change in the color, among the 14 anions studied.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | 1,3-Di-benzothiazole-amido-derivative of Calix[4]arene (L); Selective Recognition of Cu2+; Fluorescence Quenching; S2O2 Binding Core of L; DFT Computations; ESI-MS |
| ID Code: | 79190 |
| Deposited On: | 24 Jan 2012 15:32 |
| Last Modified: | 19 Apr 2012 06:45 |
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