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Article Dans Une Revue Journal of Porphyrins and Phthalocyanines Année : 2023

Electrochemistry of tri- N -methylpyridyl porphyrins

Résumé

Trisubstituted porphyrin derivatives [(TriMPyP)M][Formula: see text]([Formula: see text]) 3 [Formula: see text][Formula: see text] containing three [Formula: see text]-methyl-4-pyridyl ([Formula: see text][Formula: see text] groups were synthesized and characterized electrochemically and spectroscopically in DMSO containing 0.1 M tetrabutylammonium salts. The effect of specific counter-anions, type of metal ion and number of meso-[Formula: see text][Formula: see text] groups on the redox behavior and spectroscopic properties of the neutral and reduced species are examined before and after controlled potential reduction in a thin-layer cell. Each tri-cationic derivative initially undergoes a global two-electron reduction to give a two-banded absorption spectrum with a broad near-IR band ranging from 750–807 nm depending on the type of metal ion. The position of the near-IR band for the doubly reduced porphyrin was also found to correlate with the number of meso-[Formula: see text][Formula: see text] groups on the macrocycle which varied from 1 to 4 while the first reduction potential remained essentially unchanged upon going from macrocycles with two to three to four meso-[Formula: see text][Formula: see text] groups.

Domaines

Chimie
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Dates et versions

hal-04237263 , version 1 (11-10-2023)

Identifiants

Citer

W. Ryan Osterloh, Tatevik Chilingaryan, Benoit Habermeyer, Céline Frochot, Philippe Arnoux, et al.. Electrochemistry of tri- N -methylpyridyl porphyrins. Journal of Porphyrins and Phthalocyanines, 2023, 27 (07n10), pp.1465-1474. ⟨10.1142/s1088424623501158⟩. ⟨hal-04237263⟩
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