Thiol-Acetate Polysiloxane-Immobilized Ligand System and its Applications

Abstract

Thiol-acetate polysiloxane ligand systems of formula P-(CH₂)₃-SCH₂CO₂H,
where P represents the polysiloxane silica like
framework, have been made from the reaction of thiol polysiloxane
ligand system P-(CH₂)₃SH with ethylchloroacetate. An indirect
method is used through modification of the mercaptopropyltrimethoxysilane
by ethylchloroacetate, followed by copolymerization
with tetraethylorthosilicate. The thiol-acetate immobilized ligand
system exhibits high potential towards extraction of copper ions
from aqueous solutions.