Sensitive optical chemical sensor for trace determination of Hg(II) & Pb(II) ions based on functionalized amphiphilic block copolymer

A general design for optical chemical nanosensors is necessary for the development of efficient sensing systems with high flexibility and low capital cost for the controlled recognition heavy and toxic metals. In the present work, optical chemical nanosensors based on amphiphilic block copolymer (PS-b-PAA) functionalized using dithizone for the colorimetric recognition of toxic Hg(II) and Pb(II) ions were designed. Well-defind graft copolymers were synthesized through the highly controlled polymerization, ATRP (Atom Transfer Radical Polymerization), to synthesize polystyrene-b-poly(tert-butylacrylate) block copolymer. The successful fabrication of this optical sensor is confirmed using extensive characterizations by FT-IR, low angle X-ray diffraction (XRD), SEM, UV-Vis diffuse reflectance (DR) and TGA meanwhile its colorimetric properties, selectivity, sensitivity and reversibility are also investigated

کلیدواژه ها:

Optical sensor ، Toxic metal ، ATRP ، Amphiphiles ، Block copolymers