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Issue 39, 2012
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Synthesis, characterization, DFT studies and catalytic activities of manganese(II) complex with 1,4-bis(2,2′:6,2′′-terpyridin-4′-yl) benzene

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Abstract

A new di-manganese complex with “back-to-back” 1,4-bis(2,2′:6,2′′-terpyridin-4′-yl) benzene ligation has been synthesized and characterised by a variety of techniques. The back-to-back ligation presents a novel new mononuclear manganese catalytic centre that functions as a heterogeneous catalysis for the evolution of oxygen in the presence of an exogenous oxidant. We discuss the synthesis and spectroscopic characterizations of this complex and propose a mechanism for oxygen evolution activity of the compound in the presence of oxone. The di-manganese complex also shows efficient and selective catalytic oxidation of sulfides in the presence of H2O2. Density functional theory calculations were used to assess the structural optimization of the complex and a proposed reaction pathway with oxone. The calculations show that middle benzene ring is distorted respect to both of metallic centers, and this in turn leads to negligible resonance of electrons between two sides of complex. The calculations also indicate the unpaired electron located on oxyl-ligand emphasizes the radical mechanism of water oxidation for the system.

Graphical abstract: Synthesis, characterization, DFT studies and catalytic activities of manganese(ii) complex with 1,4-bis(2,2′:6,2′′-terpyridin-4′-yl) benzene

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Publication details

The article was received on 01 Jun 2012, accepted on 26 Jul 2012 and first published on 27 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT31544K
Citation: Dalton Trans., 2012,41, 12282-12288
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    Synthesis, characterization, DFT studies and catalytic activities of manganese(II) complex with 1,4-bis(2,2′:6,2′′-terpyridin-4′-yl) benzene

    M. M. Najafpour, W. Hillier, A. N. Shamkhali, M. Amini, K. Beckmann, Z. Jagličić, M. Jagodič, P. Strauch, A. N. Moghaddam, G. Beretta and M. Bagherzadeh, Dalton Trans., 2012, 41, 12282
    DOI: 10.1039/C2DT31544K

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