Calix[3]carbazole: A C3-symmetrical receptor for barium ion

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Mar 5:174:32-36. doi: 10.1016/j.saa.2016.11.013. Epub 2016 Nov 13.

Abstract

The binding ability of calix[3]carbazole (1) to metal ions has been investigated. It is found that 1 could serve as a non crown ether based, C3-symmetrical receptor for Ba2+ via the marriage of cation-π and cation-dipole interactions. FID assay further illustrates that 1 could selectively interact with Ba2+ over Pd2+. A possible binding mechanism for [1-Ba2+] complex is proposed.

Keywords: Barium ion; C(3)-symmetrical; Carbazole; FID; Receptor.