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Issue 35, 2019
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Systematic ligand variation to modulate the electrochemical properties of iron and manganese complexes

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Abstract

A series of iron(+III) and manganese(+II) complexes based on the dpaqR-ligand system (dpaq = 2-[bis(pyridine-2-ylmethyl)]amino-N-quinolin-8-yl-acetamide) were investigated using cyclic voltammetry (CV) to elucidate how the electronic properties of the ligands influence the overpotential and catalytic current in the context of water oxidation catalysis. For the Fe-complexes an electron withdrawing NO2 or CF3 group attached to the 5-position of the quinoline unit increased the catalytic current, but only with a simultaneous increase of the overpotential. However, when a pyrene moiety was attached to the dipicolylamine unit of the ligand, the overpotential decreased with concomitant increase of the catalytic current. Although the manganese complexes showed no reversible formation of a molecular catalytically active species for water oxidation, the variations of the ligand scaffold affected largely the same trends in their electrochemical behavior.

Graphical abstract: Systematic ligand variation to modulate the electrochemical properties of iron and manganese complexes

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Publication details

The article was received on 29 Mar 2019, accepted on 05 Jun 2019 and first published on 08 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT01343A
Dalton Trans., 2019,48, 13205-13211
  • Open access: Creative Commons BY license
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    Systematic ligand variation to modulate the electrochemical properties of iron and manganese complexes

    S. S. Rohner, N. W. Kinzel, C. Werlé and W. Leitner, Dalton Trans., 2019, 48, 13205
    DOI: 10.1039/C9DT01343A

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