ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Polymer complexes. LXVII: electrical conductivity and thermal properties of polymer complexes of quinoline azo dye

N. A. El-Ghamaz, M. A. Diab, A. Z. El-Sonbati, Sh. M. Morgan, and O. L. Salem

Damietta University, Damietta, Egypt

E-mail: elsonbatisch@yahoo.com

Abstract: A novel series of divalent transition metals (Cu²⁺, Co²⁺ and Ni²⁺) polymer complexes of azo ligand named 5-(2,3-dimethyl-1-phenylpyrazol-5-one azo)-8-hydroxyquinoline (Q) have been synthesized. The azo quinoline ligand (Q) and polymer complexes are characterized by various physicochemical techniques. The thermal properties of the ligand and its isolated polymer complexes are studied using thermogravimetric analysis. The physicochemical investigations elucidate that the azo ligand acts as a neutral bis(bidentate) ligand. The polymer complexes are found to be octahedral geometry. The change in the ac electrical conductivity, loss tangent and dielectric properties are studied upon heating in temperature region 298–550 K and frequency ranging from 0.1 to 100 kHz, moreover, the mechanism of conduction is determined. The electrical conductivity studies indicate that the ligand (Q) and polymer complexes have the semiconducting behavior. The correlated barrier hopping is the dominant conduction mechanism for all samples.

Keywords: Azo quinoline; Polymer complexes; Thermal properties; Semiconductors; Ac electrical studies; Conduction mechanism

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-017-0236-2

Chemical Papers 71 (12) 2417–2433 (2017)