Kar, Prasenjit ; Suresh, Moorthy ; Krishna Kumar, D. ; Amilan Jose, D. ; Ganguly, Bishwajit ; Das, Amitava (2007) Preferential binding of the magnesium ion by anthraquinone based chromogenic receptors Polyhedron, 26 (6). pp. 1317-1322. 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.2006.10.051
Abstract
Two new anthraquinone based receptors have been synthesized. A colour change for both these receptors could be detected when group IIA metal ions were added in DMF solution at room temperature. No such colour change was noticed for group IA metal ions. Association constants for these receptors towards Mg2+, Ca2+, Sr2+ and Ba2+ were evaluated by systematic spectrophotomeric titrations and they follow the order KMg(II)≫ KCa(II)≫ KSr(II)≫ KBa(II). The association constants for L1 were found to be higher than those for L2 toward group IIA metal ions. Ab initio quantum chemical calculations have been performed to rationalize these observed results. X-ray structural analysis shows a helical structure for one of the receptor molecules.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Chromogenic Sensors; X-ray Structure; Receptors; Metal Ions; Ab Initio Calculations; Magnesium Ion |
| ID Code: | 59907 |
| Deposited On: | 07 Sep 2011 14:18 |
| Last Modified: | 07 Sep 2011 14:18 |
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