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The electrochemical synthesis of Ni(II) and Al(III) metalloporphyrins by reaction of the dianion radical of the 5,10,15,20-tetrakis(p-hydroxyphenyl)porphyrin (TpOHPP) with Ni(II) and Al(III) ions is reported. The electrosynthesis conditions were established by cyclic voltammetry of TpOHPP. The electrosynthesis process was carried out in an undivided cell at the potential corresponding to the formation...