Electronic conduction and electrocatalysis by supramolecular tetraruthenated copper porphyrazine films

Journal of the Brazilian Chemical Society

Toyama, Marcos M.¹  Araki, Koiti¹  Matsumoto, Marcio Y.¹  Winnischofer, Herbert¹  Mayer, Ildemar¹  Toma, Henrique E.¹  Universidade de São Paulo, São Paulo, Brazil¹ 

关键词: molecular conductors;    porphyrazines;    ruthenium polypyridines;    thin films;    electrocatalysis;   

DOI  :  10.1590/S0103-50532009000400016

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

A new tetraruthenated copper(II)-tetra(3,4-pyridyl)porphyrazine species, [CuTRPyPz]4+, has been synthesized and fully characterized by means of analytical, spectroscopic and electrochemical techniques. This π-conjugated system contrasts with the related meso-tetrapyridylporphyrins by exhibiting strong electronic interaction between the coordinated peripheral complexes and the central ring. Based on favorable π-stacking and electrostatic interactions, layer-by-layer assembled films were successfully generated from the appropriate combination of [CuTRPyPz]4+ with copper(II)-tetrasulfonated phtalocyanine, [CuTSPc]4-. Their conducting and electrocatalytic properties were investigated by means of impedance spectroscopy and rotating disc voltammetry, exhibiting metallic behavior near the Ru(III/II) redox potential, as well as enhanced catalytic activity for the oxidation of nitrite and sulphite ions.

【 授权许可】

Unknown