Electronic conduction and electrocatalysis by supramolecular tetraruthenated copper porphyrazine films

Journal of the Brazilian Chemical Society

Marcio Y. Matsumoto¹  Marcos M. Toyama¹  Ildemar Mayer¹  Herbert Winnischofer¹  Koiti Araki¹  Henrique E. Toma¹ 

[1] ,Universidade de São Paulo Instituto de Química São Paulo SP ,Brazil

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

DOI  :  10.1590/S0103-50532009000400016

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 À-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 À-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】

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