2015
DOI: 10.1039/c5dt01157d
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Anion coordination selective [Mn3] and [Mn4] assemblies: synthesis, structural diversity, magnetic properties and catechol oxidase activity

Abstract: Syntheses, crystal structures, magnetic properties and catechol oxidation behavior are presented for [Mn3] and [Mn4] aggregates, [MnMn(II)(O2CMe)4(dmp)2(H2O)2]·2H2O (1·2H2O), [MnMn(II)(O2CCH2Cl)4(dmp)2(H2O)2]·H2O·MeOH (2·H2O·MeOH), [Mn(μ3-O)(dmp)4(μ-DMSO)(N3)(DMSO)(H2O)]ClO4·DMSO (3·ClO4·DMSO), and [Mn(μ3-O)(dmp)4(μ-DMSO)(ClO4)(DMSO)(H2O)]ClO4·DMSO (4·ClO4·DMSO), developed with single type ligand H2dmp, 2-[(2-hydroxy-1,1-dimethyl-ethylimino)-methyl]-phenol. The successful isolation of 1-4 resulted from a syste… Show more

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Cited by 30 publications
(9 citation statements)
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“…One coupling constant, J 1 , was considered between the outer Mn­(III) ions and the central Mn­(II) ion (see inset of Figure ), and the g -value was fixed at 2.0. Any possible exchange interaction between the outer Mn­(III) ions was neglected, based on previous studies. , The single-ion axial zero-field splitting parameter d was included in the fit for both Mn­(III) ions. An intermolecular interaction zJ ′ of 0.02 cm –1 and a temperature-independent paramagnetism (TIP) contribution of 3.2 × 10 –6 cm 3 mol –1 were also included .…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…One coupling constant, J 1 , was considered between the outer Mn­(III) ions and the central Mn­(II) ion (see inset of Figure ), and the g -value was fixed at 2.0. Any possible exchange interaction between the outer Mn­(III) ions was neglected, based on previous studies. , The single-ion axial zero-field splitting parameter d was included in the fit for both Mn­(III) ions. An intermolecular interaction zJ ′ of 0.02 cm –1 and a temperature-independent paramagnetism (TIP) contribution of 3.2 × 10 –6 cm 3 mol –1 were also included .…”
Section: Resultsmentioning
confidence: 99%
“…Any possible exchange interaction between the outer Mn(III) ions was neglected, based on previous studies. 54,55 The single-ion axial zero-field splitting parameter d was included in the fit for both Mn(III) ions. An intermolecular interaction zJ′ of 0.02 cm −1 and a temperature-independent paramagnetism (TIP) contribution of 3.2 × 10 −6 cm 3 mol −1 were also included.…”
Section: ■ Introductionmentioning
confidence: 99%
“…The rate saturation kinetics clearly support the formation of a stable complex‐substrate aggregate prior to the production of 3,5‐DTBQ. The mechanistic pathways of functioning catecholase activity of such manganese(III) complexes are well explored, and the direct redox participation of manganese(III) was suggested in most cases . To get insight into the mechanistic pathway through which the present complexes exhibit catecholase activity, the UV−vis spectra of the complex by itself and in the presence of excess substrate were recorded.…”
Section: Resultsmentioning
confidence: 99%
“…The latter is a dicopper metalloenzyme, the function of which is the oxidation of a wide range of o ‐diphenols (catechols) to the corresponding o ‐quinones, which undergo auto‐polymerization to produce a brown pigment melanin as a natural antiseptic to protect the damaged tissues against both bacterial and fungal diseases . Whereas several mono‐ and multinuclear copper complexes have been found to be successful models for such metalloenzymes,, functional models with other transition metals have been limited, and thus need further attention …”
Section: Introductionmentioning
confidence: 99%
“…Earlier we have used 2-amino-2methylpropan-1-ol as an amine alcohol Schiff base tail for synthesizing the Mn 3 and Mn 4 aggregates. 44…”
Section: Introductionmentioning
confidence: 99%