Synthesis, chemical, and thermoelectric properties of n‐type π‐conjugated polymer composed of 1,2,4‐triazole and pyridine rings and its metal complexes

Abstract

A soluble n-type p-conjugated polymer (polymer 1) composed of a 1,2,4-triazole ring substituted by a 4-n-octylphenyl subunit at the 4-position of the 1,2,4-triazole ring and pyridine-2,5-diyl rings was synthesized by Ni(cod) 2 (cod 5 1,5-cyclooctadiene) promoted dehalogenation polycondensation of 3,5-bis(2-bromopyridyl)-4-n-octylphenyl-1,2,4-triazole (monomer 1). A polymer complex (polymer-BiCl 3 ) was synthesized by the reaction of polymer 1 with BiCl 3 . The UV-vis spectrum of polymer 1 exhibited an absorption maximum (k max value) at a longer wavelength than that exhibited by monomer 1 revealing that its p-conjugation system was expanded along the polymer chain. Polymer 1 was electrochemically active in film, and the electrochemical reaction was accompanied with electrochromism. Thermoelectoric properties of polymer 1 and polymer-BiCl 3 were investigated. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39928.

Review on Polymers for Thermoelectric Applications

“…The oxidative chemical polymerization is the most usual method to synthesize conductive polymers [ 15 , 16 , 17 , 18 ]. Basically, this method consists of the reaction between the monomer and an oxidative salt that has the role of a dopant agent.…”