title: The molecular recognition of tetra(p-t-butyl)tetrathiocalix[4]arene and its derivatives to heavy metal ions.
abstract: The molecular recognition of tetra(p-t-butyl)tetrathiocalix[4]arene (I)and its three derivatives to heavy metal ions has been investigated by UV spectroscopy and solvent extraction. These derivatives include 5,11,17,23,-tetra-t-butyl-25,26,27,28-tetrakis(acetylmethoxy)tetrathiocalix[4]arene (II), 5,11,17,23-tetra-t-butyl-25,26,27,28-tetrakis(2'-hydroxypropyloxy) tetrathiocalix[4]arene (III), 5,11,17,23,-tetra-t-butyl-25,27-bis(3'-hydroxy propyloxy)tetrathiocalix[4]arene (IV). The UV spectra and solvent extraction of I show that it has an effective molecular recognition to heavy metal ions, especially to Cd(2+), while IV has a special molecular recognition to Ag(+) ion. These results confirmed the feasibilities for I to be applied in separation for toxic heavy metal ions Pb(2+), Cd(2+) and IV to be used as the sensor compound of Ag(+) ion-selective electrode.
authors.affiliation: Department of Chemistry, Tongji University, No. 1239 Siping Road, Shanghai 200092, People's Republic of China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Hu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Pan
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Xianfa
authors.initials: X
authors.lastname: Shi
mesh_terms: D047250:Calixarenes; D019216:Metals, Heavy / Q000737:chemistry / Q000378:metabolism*; D010636:Phenols / Q000737:chemistry / Q000378:metabolism*; D012997:Solvents / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet
chemical_list: D019216:Metals, Heavy; D010636:Phenols; D012997:Solvents; C121325:calix(4)arene; D047250:Calixarenes