Synthesis, characterization, conductivity, band gap and thermal analysis of poly-2-[(4-mercaptophenyl) imino methyl] phenol and some of its polymer-metal complexes


Kaya I. , BAYCAN F.

SYNTHETIC METALS, cilt.157, ss.659-669, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

The oxidative polycondensation reaction conditions of 2-[(4-mercaptophenyl) imino methyl] phenol (4-MPIMP) was studied in an aqueous alkaline medium between 30 and 90 degrees C by using oxidants such as air O-2, NaOCl and H2O2. Polymer-metal complex compounds were synthesized from the reactions of poly-2-[(4-mercaptophenyl) imino methyl] phenol (P-4-MPIMP) with Cr3+, Co2+, Ni2+, Cu2+, Mn2+, Zn2+, Pb2+, Cd2+ and Zr4+ ions. The structures of these monomer and polymer were identified from UV-vis, Fr-IR, H-1 NMR, C-13 NMR and elemental analysis. While thermal analysis of P-4-MPIMP and polymer-metal complexes were made by TGA-DTA, the number-average molecular weight (M-n), weight-average molecular weight (M-w) and polydispersity index (PDI) values of this polymer were determined by size exclusion chromatography (SEC). According to TG-DTA analyses, P-4-MPIMP-Cu was found to be higher stable than other synthesized polymer and polymer-metal complexes. While conductivity measurements of polymer and polymer-metal complexes were done by electrometer using four point probe techniques, electrochemical and optical band gap values of 4-MPIMP, P-4-MPIMP and polymer-metal complexes were determined by using cyclic voltammetry and UV-vis measurements. Conductivity and band gap values show that this polymer and polymer-metal complexes are a typical semiconductor. (c) 2007 Elsevier B.V. All rights reserved.