Calixarenes Derivatized with Sulfur-Containing Functionalities as Selective Extractants for Heavy and Precious Metal Ions

Alexander T. Yordanov, Bruce R. Whittlesey, D. Max Roundhill

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The calix[4]arenes 5,11,17,23-tert-butyl-25,26,27,28-(2-methylthioethoxy)calix[4]arene, 25,26,27,28-(2-methylthioethoxy)calix[4]arene, and 5,11,17,23-tert-butyl-25,26,27,28-(2-(2-thiophenecarboxy)ethoxy)calix[4]arene have been prepared. The structure of 25,26,27,28-(2-methylthioethoxy)calix[4]arene has been verified by X-ray crystallography. The crystals with the empirical formula C40H48O4S4 are monoclinic C2/c with a = 20.428(2) Å, b = 10.581(1) Å, c = 20.445(2) Å, β = 118.461(5)°, Z = 4. These calix [4] arenes are effective extractants for transferring heavy metal ions from aqueous solution into chloroform. The extraction of Sn(II), Hg(II), Ag(I), Pd(II), Au(III), MeHg(II), Pb(II) and Cd(II) into chloroform with these calix[4]arenes is compared with that performed with 5,11,17,23-tert-butyl-25,26,27,28-(2-N,N-dimethyldithiocarbamoylethoxy)calix[4] arene, 25,26,- 27,28-(2,N,N-dimethyldithiocarbamoylethoxy)calix[4]arene, and 5,11,17,23-tert-butyl-25,26,27,28-(2-mercaptoethoxy)- calix[4]arene.

Original languageEnglish
Pages (from-to)3526-3531
Number of pages6
JournalInorganic Chemistry
Volume37
Issue number14
DOIs
StatePublished - 1998

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