Synthesis of Some New Polysiloxane Ligands Systems (Glycinate)-Part II†

Abstract

Polysiloxane-immobilized glycinate chelating ligands system of the general formula Ⓟ-(CH₂)₃NHCH₂CO₂H (where Ⓟ represents the polysiloxane network) have been prepared by two methods. The first used is through the reaction between 3-amino-propyltriethoxysilane and chloroethylacetate, ClCH₂COOEt, followed by hydrolytic polycondensation with tetraethoxysilane (before polymerization). The second method, which was used, is through the reaction of 3-aminopropylpolysiloxane and haloethylacetate XCH₂COOEt, X = Cl or I (after polymerization). The elemental analysis indicates that more glycinate ligand groups were obtained by functionalization before polymerization than after polymerization process. The glycinate polysiloxane ligands show high potential for copper ion uptake.