Electrochemical and Spectroelectrochemical Properties of Free-Base Pyridyl- and N -Alkyl-4-Pyridylporphyrins in Nonaqueous Media

Yan Cui (1) , Lihan Zeng (1) , Yuanyuan Fang (1) , Jialiang Zhu (1) , Hai-Jun Xu (2, 3) , Nicolas Desbois (2) , Claude P. Gros (2) , Karl M. Kadish (1)

1 Department of Chemistry [University of Houston]
2 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]
3 College of Chemical Engineering, Nanjing Forestry University

Twelve structurally related pyridyl and meso-N-methylpyridylporphyrin derivatives are investigated electrochemically in different nonaqueous media. The UV/Vis spectrum of each newly investigated porphyrin was measured before and after electro-reduction and, based on this data, the site of electron transfer is proposed. An interaction occurs between the meso-pyridyl or meso-N-alkyl-4-pyridyl substituents and the porphyrin p-ring system, the magnitude of which depends upon the number of linked pyridyl or N-alkyl-4-pyridyl groups in the compound, the solvent, the supporting electrolyte, and/or other anions added to the solution.

Mots clés: electrochemistry; interacting centers; nonaqueous media; porphyrins; spectroelectrochemistry; spectral characterization; cationic porphyrin; complex-formation; dna; reduction; binding; n; n-dimethylformamide; dimethylformamide; aggregation; potentials

Domaines: Chimie

Yan Cui, Lihan Zeng, Yuanyuan Fang, Jialiang Zhu, Hai-Jun Xu, et al.. Electrochemical and Spectroelectrochemical Properties of Free-Base Pyridyl- and N -Alkyl-4-Pyridylporphyrins in Nonaqueous Media. ChemElectroChem, 2016, 3 (1), pp.110 - 121. ⟨10.1002/celc.201500374⟩. ⟨hal-01400268⟩