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.
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