Synthesis of an organic semiconductor by polimerization of 3-amino-1,2,4-triazole.

LAMANNA MELISA E.; DE LA HORRA ENRIQUE; JACOBO SILVIA; D'ACCORSO NORMA B.

REACTIVE & FUNCTIONAL POLYMERS

Elsevier

Año: 2009 vol. 69 p. 759 - 765

1381-5148

We performed the polymerization of 3-amino-1,2,4-triazole (ATA), an insulator material, in acidic aqueous solution with ammonium persulfate, as oxidant agent. The new material, conveniently doped, turned out to be a semiconductor tetramer. The characterization was carried out using physical and spectroscopic techniques (elemental analysis, infrared spectroscopy, 1H NMR, 13C NMR and mass spectra). Thermogravimetric analysis (TGA) indicated that this oligomer enhances thermal stability of starting material. The room temperature electrical conductivity of the synthesized oligomer (OATA) was 3.1 104 S cm1. The kinetic polymerization was analyzed by UV–vis spectroscopy, taking into account the pH dependence, monomer–oxidant ratio and monomer concentration. A possible polymerization mechanism was proposed.