| 19081182 |
Bozkurt S, Kocabas E, Durmaz M, Yilmaz M, Sirit A: Synthesis and dichromate anion sorption of silica gel-immobilized calix [4] arenes. J Hazard Mater. 2009 Jun 15;165(1-3):974-9. Epub 2008 Nov 5.
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. |
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