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Dive into the research topics where Mikael A. Minier is active.

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Featured researches published by Mikael A. Minier.


Journal of the American Chemical Society | 2015

Million-Fold Electrical Conductivity Enhancement in Fe2(DEBDC) versus Mn2(DEBDC) (E = S, O)

Lei Sun; Christopher H. Hendon; Mikael A. Minier; Aron Walsh; Mircea Dincă

Reaction of FeCl2 and H4DSBDC (2,5-disulfhydrylbenzene-1,4-dicarboxylic acid) leads to the formation of Fe2(DSBDC), an analogue of M2(DOBDC) (MOF-74, DOBDC4– = 2,5-dihydroxybenzene-1,4-dicarboxylate). The bulk electrical conductivity values of both Fe2(DSBDC) and Fe2(DOBDC) are ∼6 orders of magnitude higher than those of the Mn2+ analogues, Mn2(DEBDC) (E = O, S). Because the metals are of the same formal oxidation state, the increase in conductivity is attributed to the loosely bound Fe2+ β-spin electron. These results provide important insight for the rational design of conductive metal–organic frameworks, highlighting in particular the advantages of iron for synthesizing such materials.


Journal of the American Chemical Society | 2016

Achieving Reversible Sensing of Nitroxyl by Tuning the Ligand Environment of Azamacrocyclic Copper(II) Complexes

Sunghee Kim; Mikael A. Minier; Andrei Loas; Sabine Becker; Fang Wang; Stephen J. Lippard

To elucidate the factors that impart selectivity for nitroxyl (HNO) over nitric oxide (NO), thiols, and H2S in metal-based fluorescent probes, we investigated five Cu(II)-cyclam (14-N4) derivatives. Upon exposure to NO gas at pH 7, no changes occur in the UV-vis spectra of any of the complexes. Addition of Angelis salt to generate HNO promotes reduction of Cu(II) only in the case of [Cu(II)(14-N4-Ts)(OTf)2], which has the most positive reduction potential of the series. To gain insight into the observed reactivity, we prepared the Cu(II) complex of the mixed thia/aza 14-N2S2 ligand. [Cu(II)(14-N2S2)(OTf)2] reacts reversibly with HNO at pH 7, although nonselectively over thiols and H2S. The recurrent sensing of HNO uncovered with the study of Cu(II) azamacrocyclic complexes is a remarkable feature that opens the door for the design of a new generation of metal-based probes.


Organometallics | 2014

Conversion Between Doubly and Triply Carboxylate-Bridged Di(ethylzinc) Complexes and Formation of the (μ-Oxo)tetrazinc Carboxylate [Zn4O(Ar(Tol)CO2)6].

Mikael A. Minier; Stephen J. Lippard

Ethylzinc 2,6-bis(p-tolyl)benzoate converts between two forms in solution. Through NMR spectroscopic techniques and X-ray crystallography, the species in equilibrium were identified as [Zn2(ArTolCO2)2(Et)2(THF)2] (1), [Zn2(ArTolCO2)3(Et)(THF)] (2), and diethylzinc (ArTol = 2,6-bis(p-tolyl)phenyl). The equilibrium provides a model for understanding the speciation between doubly and triply m-terphenylcarboxylate bridged diiron(II) and mononuclear iron(II) complexes. Evidence is presented for the occurrence of coordinatively unsaturated trigonal zinc species in solution. Both 1 and 2 decompose in air to form the T-symmetric oxozinc carboxylate [Zn4O(ArTolCO2)6] (3).


Inorganic Chemistry | 2017

Tuning the Diiron Core Geometry in Carboxylate-Bridged Macrocyclic Model Complexes Affects Their Redox Properties and Supports Oxidation Chemistry

Fang Wang; Sabine Becker; Mikael A. Minier; Andrei Loas; Megan N. Jackson; Stephen J. Lippard

We introduce a novel platform to mimic the coordination environment of carboxylate-bridged diiron proteins by tethering a small, dangling internal carboxylate, (CH2)nCOOH, to phenol-imine macrocyclic ligands (H3PIMICn). In the presence of an external bulky carboxylic acid (RCO2H), the ligands react with [Fe2(Mes)4] (Mes = 2,4,6-trimethylphenyl) to afford dinuclear [Fe2(PIMICn)(RCO2)(MeCN)] (n = 4-6) complexes. X-ray diffraction studies revealed structural similarities between these complexes and the reduced diiron active sites of proteins such as Class I ribonucleotide reductase (RNR) R2 and soluble methane monooxygenase hydroxylase. The number of CH2 units of the internal carboxylate arm controls the diiron core geometry, affecting in turn the anodic peak potential of the complexes. As functional synthetic models, these complexes facilitate the oxidation of C-H bonds in the presence of peroxides and oxo transfer from O2 to an internal phosphine moiety.


European Journal of Inorganic Chemistry | 2014

Synthesis and Characterization of a Linear Dinitrosyl-Triiron Complex

Eric Victor; Mikael A. Minier; Stephen J. Lippard


Dalton Transactions | 2015

19F NMR study of ligand dynamics in carboxylate-bridged diiron(II) complexes supported by a macrocyclic ligand

Mikael A. Minier; Stephen J. Lippard


PMC | 2015

[superscript 19]F NMR Study of Ligand Dynamics in Carboxylate-Bridged Diiron(II) Complexes Supported by a Macrocyclic Ligand

Mikael A. Minier; Stephen J. Lippard


American Chemical Society | 2015

Million-Fold Electrical Conductivity Enhancement in Fe[subscript 2](DEBDC) versus Mn[subscript 2](DEBDC) (E = S, O)

Lei Sun; Christopher H. Hendon; Aron Walsh; Mikael A. Minier; Mircea Dinca


Wiley Blackwell | 2014

Synthesis and Characterization of a Linear Dinitrosyl-Triiron Complex; Comparison to a Flavodiiron Nitric Oxide Reductase Intermediate

Eric Victor; Mikael A. Minier; Stephen J. Lippard


PMC | 2014

Conversion between Doubly and Triply Carboxylate Bridged Bis(ethylzinc) Complexes and Formation of the (μ-Oxo)tetrazinc Carboxylate [Zn[subscript 4]O(Ar[superscript Tol]CO[subscript 2)[subscript 6]]

Stephen J. Lippard; Mikael A. Minier

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Stephen J. Lippard

Massachusetts Institute of Technology

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Andrei Loas

Massachusetts Institute of Technology

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Eric Victor

University of Wisconsin-Madison

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Fang Wang

University of Southern California

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Lei Sun

Massachusetts Institute of Technology

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Christopher H. Hendon

Massachusetts Institute of Technology

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Mircea Dincă

Massachusetts Institute of Technology

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