Detection of uranium(VI) in aqueous solution by a calix[6]arene modified electrode.

Citation:

Amit Becker, Tobias, Haim , Porat, Ze’ev , and Mandler, Daniel. . 2008. “Detection Of Uranium(Vi) In Aqueous Solution By A Calix[6]Arene Modified Electrode.”. J. Electroanal. Chem.journal Of Electroanalytical Chemistry, 621, Pp. 214 - 221.

Abstract:

This work describes attempts to develop a new type of modified electrode with high selectivity for uranyl ions, UO22+. The goal was addressed by binding derivs. of calix[6]arene, a macrocyclic mol. composed of 6 phenol units known as a super uranophile, to the electrode surface. Selective extn. of UO22+ onto the electrode surface, followed by a voltammetric measurement provides a quant. uranyl anal. The initial approach to binding calix[6]arene mols. onto electrodes involved an ionic deriv., 4-sulfonic-calix[6]arene, electrostatically attached to a pos.-charged, self-assembled monolayer of cysteamine (2-aminoethanethiol) on a Au electrode. Attachment of the 4-sulfonic-calix[6]arene to the cysteamine monolayer was verified by XPS, IR spectroscopy, and capacitance measurements. Voltammetric expts. showed UO22+ can be pre-concd. and measured using these modified electrodes. [on SciFinder(R)]