title: Synthesis and dichromate anion sorption of silica gel-immobilized calix[4]arenes.
abstract: Three new silica gel-immobilized calix[4]arene polymers 9-11 have been prepared via modification of calix[4]arene mono amido derivatives 3-5 with 3-aminopropyl triethoxysilane (APTES) and activated silica gel, respectively. The polymers were characterized by Fourier transform infrared spectroscopy, elemental analysis and thermal gravimetric analysis. The solid-liquid extraction properties of ligands 3-5 along with their immobilized derivatives 9-11 towards dichromate (HCr(2)O(7)(-)/Cr(2)O(7)(2-)) anions were reported. It was found that these calix[4]arene-based polymers have high extraction abilities towards dichromate anions as compared to their monomeric precursors.
authors.affiliation: Department of Chemistry, Selçuk University, Konya, Turkey.
authors.forename: Selahattin
authors.initials: S
authors.lastname: Bozkurt
authors.forename: Erdal
authors.initials: E
authors.lastname: Kocabas
authors.forename: Mustafa
authors.initials: M
authors.lastname: Durmaz
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yilmaz
authors.forename: Abdulkadir
authors.initials: A
authors.lastname: Sirit
mesh_terms: D000327:Adsorption; D047250:Calixarenes / Q000737:chemistry*; D002840:Chromates / Q000302:isolation & purification*; D010636:Phenols / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011437:Propylamines; D012821:Silanes; D058428:Silica Gel; D012822:Silicon Dioxide
chemical_list: D002840:Chromates; D010636:Phenols; D011108:Polymers; D011437:Propylamines; D012821:Silanes; C121325:calix(4)arene; D047250:Calixarenes; D058428:Silica Gel; D012822:Silicon Dioxide; C477625:amino-propyl-triethoxysilane