Novel dinuclear manganese(III) complexes with bi- or tridentate and bridging tetradentate Schiff base ligands: preparation, properties and catalase-like function

Nakamura, Toshio; Niwa, Kenshin; Usugi, Shino; Asada, Hideyuki; Fujiwara, Manabu; Matsushita, Takayuki

doi:10.1016/s0277-5387(00)00636-7

Cited by 23 publications

(17 citation statements)

References 24 publications

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“…All this suggests the interaction of hydrogen peroxide with central Mn III atoms. The observed changes in 300–430 nm is similar to that reported earlier by Nakamura et al42b and Moreno et al12a for Mn III complexes.…”

Section: Resultssupporting

confidence: 91%

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand

Hosseini‐Monfared

Bikas

Mohammadi

et al. 2013

Zeitschrift anorg allge chemie

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A 1D coordination polymer of manganese(III) with a hydrazone‐based ligand, [Mn2(L)(μ‐OCH3)2(OHCH3)2]n (1), was synthesized and characterized by elemental analyses and spectroscopic methods {H4L = bis[(2‐hydroxynaphthalen‐1‐yl)methylene]adipohydrazide}. The crystal structure of 1 was determined by X‐ray crystallography. The two dianionic domains of the ligand adopt trans configuration, and each coordinates in a tridentate mode via the O, N, O′‐donor atoms to a MnIII ion forming a dinuclear compound. The methoxy ligands provide an asymmetric bridge between two central manganese atoms, which lead to the formation of a 1D coordination polymer. A 2D supramolecular structure is formed by hydrogen bonding interactions between the 1D chains. Although the methoxy ligands are labile, the polymer preserves its oligonuclearity in the solution. Temperature‐dependent magnetic susceptibility studies proved the presence of a weak antiferromagnetic interaction between manganese(III) ions with J = –3.2 cm–1, which results from axial distortion of the manganese coordination environment. Compound 1 showed catalase‐like activity in disproportionation of H2O2.

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Section: Resultssupporting

confidence: 91%

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand

Hosseini‐Monfared

Bikas

Mohammadi

et al. 2013

Zeitschrift anorg allge chemie

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“…As can be observed in Figure 1 the donor atoms N1, N22 and O10 occupy one face of the octahedron while N4, N42 and O30 occupy the other face. The axial Mn-N pyridine bond distances of 2.248(6) and 2.282(6) Å in complex 1 are the longest of the coordination sphere and this is consistent with a Jahn- [28][29][30][32][33][34] The trans angles at the Mn III center in 1 are in the range of 168.7(2)-173.7(2)° with the greatest distortion from linearity occurring at the O10-Mn-O4 and O30-Mn-N1 angles.…”

Section: Description Of the Crystal Structures Of Complexes 1 Andsupporting

confidence: 67%

New phenoxyl radical complexes of manganese, gallium, indium and iron based on an H2bbpen ligand derivative

Anjos¹,

Bortoluzzi²,

Miguel³

et al. 2006

J. Braz. Chem. Soc.

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Reportamos aqui a síntese e caracterização do ligante hexadentado H 2 L (N,N',N,N'-bis[(2-hidroxi-3,5-di-terc-butilbenzil)(2-piridilmetil)]etilenodiamino), como derivado adicional do bem conhecido pré-ligante H 2 bbpen, e que contém dois grupos fenolatos e dois grupos piridínicos conectados à unidade etilenodiamina. Os grupos fenolatos no pré-ligante H 2 L estão adequadamente protegidos por grupos substituintes volumosos (terc-butil) nas posições orto-e para-, a partir dos quais complexos contendo radicais fenoxil estáveis podem ser obtidos. Reported herein are the synthesis and characterization of the hexadentate H 2 L pro-ligand (N,N',N,N'-bis[(2-hydroxy-3,5-di-tert-butylbenzyl)(2-pyridylmethyl)]ethylenediamine), as a further derivative of the well known pro-ligand H 2 bbpen which contains two phenolate and two pyridyl pendant arms. The phenolate groups in H 2 L are suitably protected by bulky substituents (tert-butyl) in the ortho-and para-positions, from which stable phenoxyl radical complexes can be formed. complexes were determined by X-ray crystallographic analyses revealing monocationic complexes with distorted octahedral geometries.

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“…Mn LMCT upon reaction with H 2 O 2 can be interpreted taking into account the effect of the carboxylate binding mode on the spectroscopic properties of these complexes. If upon reaction with H 2 O 2 , the bridging acetato shifts to a monodentate coordinated acetato, it should function as a weaker donor and should reduce the energy gap between the d p and PhO p orbitals thus causing a red shift of the signal [50][51][52]. Besides, the shift of the bridging methanolato ligand to a weakly bound terminal ligand should also contribute to the red shift of the band.…”

Section: Discussionmentioning

confidence: 99%

New dimanganese(III) complexes of pentadentate (N2O3) Schiff base ligands with the [Mn2(μ-OAc)(μ-OR)2]3+ core: Synthesis, characterization and mechanistic studies of H2O2 disproportionation

Biava¹,

Palopoli²,

Shova³

et al. 2006

Journal of Inorganic Biochemistry

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Novel dinuclear manganese(III) complexes with bi- or tridentate and bridging tetradentate Schiff base ligands: preparation, properties and catalase-like function

Cited by 23 publications

References 24 publications

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand

New phenoxyl radical complexes of manganese, gallium, indium and iron based on an H2bbpen ligand derivative

New dimanganese(III) complexes of pentadentate (N2O3) Schiff base ligands with the [Mn2(μ-OAc)(μ-OR)2]3+ core: Synthesis, characterization and mechanistic studies of H2O2 disproportionation

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Novel dinuclear manganese(III) complexes with bi- or tridentate and bridging tetradentate Schiff base ligands: preparation, properties and catalase-like function

Cited by 23 publications

References 24 publications

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)2‐Donor Ligand

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)2‐Donor Ligand

New phenoxyl radical complexes of manganese, gallium, indium and iron based on an H2bbpen ligand derivative

New dimanganese(III) complexes of pentadentate (N2O3) Schiff base ligands with the [Mn2(μ-OAc)(μ-OR)2]3+ core: Synthesis, characterization and mechanistic studies of H2O2 disproportionation

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Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand

Synthesis, Structure, Magnetic Properties, and Catalase‐like Activity of Methoxy‐bridged Manganese(III) Coordination Polymer containing Hydrazone based (O,N,O)₂‐Donor Ligand