1
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Freire DM, Johnston HM, Smith KJ, Pota K, Mekhail MA, Kharel S, Green KN. Hydrogen Peroxide Disproportionation Activity Is Sensitive to Pyridine Substitutions on Manganese Catalysts Derived from 12-Membered Tetra-Aza Macrocyclic Ligands. Inorg Chem 2023; 62:15842-15855. [PMID: 37729496 PMCID: PMC10829483 DOI: 10.1021/acs.inorgchem.3c01234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
The abundance of manganese in nature and versatility to access different oxidation states have made manganese complexes attractive as catalysts for oxidation reactions in both biology and industry. Macrocyclic ligands offer the advantage of substantially controlling the reactivity of the manganese center through electronic tuning and steric constraint. Inspired by the manganese catalase enzyme, a biological catalyst for the disproportionation of H2O2 into water and O2, the work herein employs 12-membered tetra-aza macrocyclic ligands to study how the inclusion of and substitution to the pyridine ring on the macrocyclic ligand scaffold impacts the reactivity of the manganese complex as a H2O2 disproportionation catalyst. Synthesis and isolation of the manganese complexes was validated by characterization using UV-vis spectroscopy, SC-XRD, and cyclic voltammetry. Potentiometric titrations were used to study the ligand basicity as well as the thermodynamic equilibrium with Mn(II). Manganese complexes were also produced in situ and characterized using electrochemistry for comparison to the isolated species. Results from these studies and H2O2 reactivity showed a remarkable difference among the ligands studied, revealing instead a distinction in the reactivity regarding the number of pyridine rings within the scaffold. Moreover, electron-donating groups on the 4-position of the pyridine ring enhanced the reactivity of the manganese center for H2O2 disproportionation, demonstrating a handle for control of oxidation reactions using the pyridinophane macrocycle.
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Affiliation(s)
- David M Freire
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Hannah M Johnston
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Katherine J Smith
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Magy A Mekhail
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Sugam Kharel
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
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2
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Fitzhugh HC, Furness JW, Pederson MR, Peralta JE, Sun J. Comparative Density Functional Theory Study of Magnetic Exchange Couplings in Dinuclear Transition-Metal Complexes. J Chem Theory Comput 2023; 19:5760-5772. [PMID: 37582098 PMCID: PMC10500985 DOI: 10.1021/acs.jctc.3c00336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Indexed: 08/17/2023]
Abstract
Multicenter transition-metal complexes (MCTMs) with magnetically interacting ions have been proposed as components for information-processing devices and storage units. For any practical application of MCTMs as magnetic units, it is crucial to characterize their magnetic behavior, and in particular, the isotropic magnetic exchange coupling, J, between its magnetic centers. Due to the large size of typical MCTMs, density functional theory is the only practical electronic structure method for evaluating the J coupling. Here, we assess the accuracy of different density functional approximations for predicting the magnetic couplings of eight dinuclear transition-metal complexes, including five dimanganese, two dicopper, and one divanadium with known reliable experimental J couplings spanning from ferromagnetic to strong antiferromagnetic. The density functionals considered include global hybrid functionals which mix semilocal density functional approximations and exact exchange with a fixed admixing parameter, six local hybrid functionals where the admixing parameters are extended to be spatially dependent, the SCAN and r2SCAN meta-generalized gradient approximations (GGAs), and two widely used GGAs. We found that global hybrids tested in this work have a tendency to over-correct the error in magnetic coupling parameters from the Perdew-Burke-Ernzerhof (PBE) GGA as seen for manganese complexes. The performance of local hybrid density functionals shows no improvement in terms of bias and is scattered without a clear trend, suggesting that more efforts are needed for the extension from global to local hybrid density functionals for this particular property. The SCAN and r2SCAN meta-GGAs are found to perform as well as benchmark global hybrids on most tested complexes. We further analyze the charge density redistribution of meta-GGAs as well as global and local hybrid density functionals with respect to that of PBE, in connection to the self-interaction error or delocalization error.
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Affiliation(s)
- Henry C. Fitzhugh
- Department
of Physics and Engineering Physics, Tulane
University, New Orleans, Louisiana 70118, United States
| | - James W. Furness
- Department
of Physics and Engineering Physics, Tulane
University, New Orleans, Louisiana 70118, United States
| | - Mark R. Pederson
- Department
of Physics, The University of Texas at El
Paso, El Paso, Texas 79968, United States
| | - Juan E. Peralta
- Department
of Physics and Science of Advanced Materials, Central Michigan University, Mount Pleasant, Michigan 48859, United States
| | - Jianwei Sun
- Department
of Physics and Engineering Physics, Tulane
University, New Orleans, Louisiana 70118, United States
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3
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Xiao Y, Li M, Chen JR, Lian X, Huang YL, Huang XC. The missing MIL-101(Mn): geometrically guided synthesis and topologically correlated valence states. Inorg Chem Front 2022; 9:6124-6132. [DOI: 10.1039/d2qi01894b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Through a geometrically guided approach, i.e. with the aid of pyridyl modulators, the long-sought MIL-101(Mn) structure is finally achieved, which features emergent topologically correlated mixed-valence states that are apt for enzymatic catalysis.
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Affiliation(s)
- Yonghong Xiao
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, China
| | - Mian Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China
| | - Jian-Rui Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, China
| | - Xin Lian
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, China
- School of Materials Science and Engineering, National Institute for Advanced Materials, TKL of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China
| | - Yong-Liang Huang
- Department of Medicinal Chemistry, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Xiao-Chun Huang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China
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4
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Huang Z, Guan R, Shanmugam M, Bennett EL, Robertson CM, Brookfield A, McInnes EJL, Xiao J. Oxidative Cleavage of Alkenes by O 2 with a Non-Heme Manganese Catalyst. J Am Chem Soc 2021; 143:10005-10013. [PMID: 34160220 PMCID: PMC8297864 DOI: 10.1021/jacs.1c05757] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
![]()
The oxidative cleavage
of C=C double bonds with molecular
oxygen to produce carbonyl compounds is an important transformation
in chemical and pharmaceutical synthesis. In nature, enzymes containing
the first-row transition metals, particularly heme and non-heme iron-dependent
enzymes, readily activate O2 and oxidatively cleave C=C
bonds with exquisite precision under ambient conditions. The reaction
remains challenging for synthetic chemists, however. There are only
a small number of known synthetic metal catalysts that allow for the
oxidative cleavage of alkenes at an atmospheric pressure of O2, with very few known to catalyze the cleavage of nonactivated
alkenes. In this work, we describe a light-driven, Mn-catalyzed protocol
for the selective oxidation of alkenes to carbonyls under 1 atm of
O2. For the first time, aromatic as well as various nonactivated
aliphatic alkenes could be oxidized to afford ketones and aldehydes
under clean, mild conditions with a first row, biorelevant metal catalyst.
Moreover, the protocol shows a very good functional group tolerance.
Mechanistic investigation suggests that Mn–oxo species, including
an asymmetric, mixed-valent bis(μ-oxo)-Mn(III,IV) complex, are
involved in the oxidation, and the solvent methanol participates in
O2 activation that leads to the formation of the oxo species.
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Affiliation(s)
- Zhiliang Huang
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K
| | - Renpeng Guan
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K
| | - Muralidharan Shanmugam
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, U.K
| | - Elliot L Bennett
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K
| | - Craig M Robertson
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K
| | - Adam Brookfield
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, U.K
| | - Eric J L McInnes
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, U.K
| | - Jianliang Xiao
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K
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5
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Lang SM, Bernhardt TM, Bakker JM, Barnett RN, Landman U. Energetic Stabilization of Carboxylic Acid Conformers by Manganese Atoms and Clusters. J Phys Chem A 2020; 124:4990-4997. [DOI: 10.1021/acs.jpca.0c03315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sandra M. Lang
- Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany
| | - Thorsten M. Bernhardt
- Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany
| | - Joost M. Bakker
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Robert N. Barnett
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, United States
| | - Uzi Landman
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, United States
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6
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Assessment of Double-Hybrid Density Functional Theory for Magnetic Exchange Coupling in Manganese Complexes. INORGANICS 2019. [DOI: 10.3390/inorganics7050057] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Molecular systems containing magnetically interacting (exchange-coupled) manganese ions are important in catalysis, biomimetic chemistry, and molecular magnetism. The reliable prediction of exchange coupling constants with quantum chemical methods is key for tracing the relationships between structure and magnetic properties in these systems. Density functional theory (DFT) in the broken-symmetry approach has been employed extensively for this purpose and hybrid functionals with moderate levels of Hartree–Fock exchange admixture have often been shown to perform adequately. Double-hybrid density functionals that introduce a second-order perturbational contribution to the Kohn–Sham energy are generally regarded as a superior approach for most molecular properties, but their performance remains unexplored for exchange-coupled manganese systems. An assessment of various double-hybrid functionals for the prediction of exchange coupling constants is presented here using a set of experimentally characterized dinuclear manganese complexes that cover a wide range of exchange coupling situations. Double-hybrid functionals perform more uniformly compared to conventional DFT methods, but they fail to deliver improved accuracy or reliability in the prediction of exchange coupling constants. Reparametrized double-hybrid density functionals (DHDFs) perform no better, and most often worse, than the original B2-PLYP double-hybrid method. All DHDFs are surpassed by the hybrid-meta-generalized gradient approximation (GGA) TPSSh functional. Possible directions for future methodological developments are discussed.
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7
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Boutar M, Desroches C, Mattoussi N, Habib Noamane M, Bois L, Gautier-Luneau I, Abidi R, Luneau D. Coordination polymers of zinc(II) and manganese(II) made by complexation of calix[4]arene functionalized with carboxylates afford alveolar materials. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.11.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Olson TL, Espiritu E, Edwardraja S, Canarie E, Flores M, Williams JC, Ghirlanda G, Allen JP. Biochemical and spectroscopic characterization of dinuclear Mn-sites in artificial four-helix bundle proteins. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2017; 1858:945-954. [PMID: 28882760 DOI: 10.1016/j.bbabio.2017.08.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/28/2017] [Accepted: 08/31/2017] [Indexed: 01/18/2023]
Abstract
To better understand metalloproteins with Mn-clusters, we have designed artificial four-helix bundles to have one, two, or three dinuclear metal centers able to bind Mn(II). Circular dichroism measurements showed that the Mn-proteins have substantial α-helix content, and analysis of electron paramagnetic resonance spectra is consistent with the designed number of bound Mn-clusters. The Mn-proteins were shown to catalyze the conversion of hydrogen peroxide into molecular oxygen. The loss of hydrogen peroxide was dependent upon the concentration of protein with bound Mn, with the proteins containing multiple Mn-clusters showing greater activity. Using an oxygen sensor, the oxygen concentration was found to increase with a rate up to 0.4μM/min, which was dependent upon the concentrations of hydrogen peroxide and the Mn-protein. In addition, the Mn-proteins were shown to serve as electron donors to bacterial reaction centers using optical spectroscopy. Similar binding of the Mn-proteins to reaction centers was observed with an average dissociation constant of 2.3μM. The Mn-proteins with three metal centers were more effective at this electron transfer reaction than the Mn-proteins with one or two metal centers. Thus, multiple Mn-clusters can be incorporated into four-helix bundles with the capability of performing catalysis and electron transfer to a natural protein.
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Affiliation(s)
- Tien L Olson
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Eduardo Espiritu
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | | | - Elizabeth Canarie
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Marco Flores
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - JoAnn C Williams
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Giovanna Ghirlanda
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - James P Allen
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA.
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9
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Grineva AA, Ageshina AA, Uvarova MA, Nefedov SE. Formation of 1-D polymer in recrystallization of the adduct Mn[(OOCC5H4)Mn(CO)3]2[O(H)Me]4 from acetonitrile. RUSS J INORG CHEM+ 2016. [DOI: 10.1134/s0036023616090060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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11
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12
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Abdolahzadeh S, de Boer JW, Browne WR. Redox-State Dependent Ligand Exchange in Manganese-Based Oxidation Catalysis. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Palopoli C, Duhayon C, Tuchagues JP, Signorella S. Synthesis, characterization, and reactivity studies of a water-soluble bis(alkoxo)(carboxylato)-bridged diMn(III) complex modeling the active site in catalase. Dalton Trans 2015; 43:17145-55. [PMID: 25315041 DOI: 10.1039/c4dt01907e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new diMn(III) complex, Na[Mn2(5-SO3-salpentO)(μ-OAc)(μ-OMe)(H2O)]·4H2O, where 5-SO3-salpentOH = 1,5-bis(5-sulphonatosalicylidenamino)pentan-3-ol, has been prepared and characterized. ESI-mass spectrometry, paramagnetic (1)H NMR, EPR and UV-visible spectroscopic studies on freshly prepared solutions of the complex in methanol and 9 : 1 methanol-water mixtures showed that the compound retains the triply bridged bis(μ-alkoxo)(μ-acetato)Mn2(3+) core in solution. In the 9 : 1 methanol-water mixture, slow substitution of acetate by water molecules took place, and after one month, the doubly bridged diMn(III) complex, [Mn2(5-SO3-salpentO)(μ-OMe)(H2O)3]·5H2O, formed and could be characterized by X-ray diffraction analysis. In methanolic or aqueous basic media, acetate shifts from a bridging to a terminal coordination mode, affording the highly stable [Mn2(5-SO3-salpentO)(μ-OMe)(OAc)](-) anion. The efficiency of the complex in disproportionating H2O2 depends on the solvent and correlates with the stability of the complex (towards metal dissociation) in each medium: basic buffer > aqueous base > water. The buffer preserves the integrity of the catalyst and the rate of O2 evolution remains essentially constant after successive additions of excess of H2O2. Turnovers as high as 3000 mol H2O2 per mol of catalyst, without significant decomposition and with an efficiency of k(cat)/K(M) = 1028 M(-1) s(-1), were measured for the complex in aqueous buffers of pH 11. Kinetic and spectroscopic results suggest a catalytic cycle that runs between Mn(III)2 and Mn(IV)2 oxidation states, which is consistent with the low redox potential observed for the Mn(III)2/Mn(III)Mn(IV) couple of the catalyst in basic medium.
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Affiliation(s)
- Claudia Palopoli
- IQUIR (Instituto de Química Rosario), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, (S2002LRK) Rosario, Argentina.
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14
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Angelone D, Abdolahzadeh S, de Boer JW, Browne WR. Mechanistic Links in the in‐situ Formation of Dinuclear Manganese Catalysts, H
2
O
2
Disproportionation, and Alkene Oxidation. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Davide Angelone
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, http://www.rug.nl/research/molecular‐inorganic‐chemistry/browne
| | - Shaghayegh Abdolahzadeh
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, http://www.rug.nl/research/molecular‐inorganic‐chemistry/browne
| | - Johannes W. de Boer
- Chemsenti Ltd., BioPartner Center Leiden, Galileiweg 8, 2333 BD Leiden, The Netherlands
| | - Wesley R. Browne
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, http://www.rug.nl/research/molecular‐inorganic‐chemistry/browne
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15
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Manganese(II) complexes of quinoline derivatives: characterization, catalase activity, interaction with mitochondria and anticancer activity. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9876-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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16
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Bryliakov KP, Talsi EP. Active sites and mechanisms of bioinspired oxidation with H2O2, catalyzed by non-heme Fe and related Mn complexes. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.06.009] [Citation(s) in RCA: 189] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Sivanesan D, Kannan S, Thangadurai TD, Jung KD, Yoon S. Water is a key factor to alter the structure and electrochemical properties of carboxylate-bridged dimanganese(II) complexes. Dalton Trans 2014; 43:11465-9. [PMID: 24926561 DOI: 10.1039/c4dt00520a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and physical properties of dimanganese(II) compounds with varying numbers of water ligands housed in the four bulky carboxylate motifs, including the first complex with a parallelogram core {Mn2(μ-OH2)2(μ-O2CR)}(3+) unit, are described. The isolation of these complexes revealed how water could alter the structural and electrochemical properties of similar carboxylate-bridged dimanganese(II) cores that may occur in a variety of active sites of Mn-containing metalloenzymes. These studies support the notion that water molecules in coordination spheres of active sites of metalloproteins are not a simple spectator medium but the modulation factor of structures and functions.
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Affiliation(s)
- Dharmalingam Sivanesan
- Department of Bio & Nano Chemistry, College of Natural Sciences, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Republic of Korea.
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18
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Gogoleva NV, Zorina-Tikhonova EN, Efimov NN, Ugolkova EA, Bogomyakov AS, Kolotilov SV, Kiskin MA, Aleksandrov GG, Minin VV, Sidorov AA, Novotortsev VM, Eremenko IL. Structures and magnetic properties of new trinuclear CoII, NiII, and CuII complexes with trimethylacetate and 1,1-cyclohexanediacetate. Russ Chem Bull 2014. [DOI: 10.1007/s11172-014-0594-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Westphal A, Klinkebiel A, Berends HM, Broda H, Kurz P, Tuczek F. Electronic Structure and Spectroscopic Properties of Mononuclear Manganese(III) Schiff Base Complexes: A Systematic Study on [Mn(acen)X] Complexes by EPR, UV/vis, and MCD Spectroscopy (X = Hal, NCS). Inorg Chem 2013; 52:2372-87. [DOI: 10.1021/ic301889e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Anne Westphal
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
| | - Arne Klinkebiel
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
| | - Hans-Martin Berends
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
| | - Henning Broda
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
| | - Philipp Kurz
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
| | - Felix Tuczek
- Institut
für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Germany
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20
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Saisaha P, de Boer JW, Browne WR. Mechanisms in manganese catalysed oxidation of alkenes with H2O2. Chem Soc Rev 2013; 42:2059-74. [DOI: 10.1039/c2cs35443h] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Gómez V, Corbella M. Catalase Activity of Dinuclear Mn
III
Compounds with Chlorobenzoato Bridges. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200143] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Verónica Gómez
- Department de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1–11, 08028 Barcelona, Spain, Fax: +34‐934907725
| | - Montserrat Corbella
- Department de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1–11, 08028 Barcelona, Spain, Fax: +34‐934907725
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22
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Berggren G, Anderlund MF, Styring S, Thapper A. FTIR Study of Manganese Dimers with Carboxylate Donors As Model Complexes for the Water Oxidation Complex in Photosystem II. Inorg Chem 2012; 51:2332-7. [DOI: 10.1021/ic202323b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gustav Berggren
- Department of Photochemistry and
Molecular Science, Uppsala University,
P.O. Box 523, S-75120 Uppsala,
Sweden
| | - Magnus F. Anderlund
- Department of Photochemistry and
Molecular Science, Uppsala University,
P.O. Box 523, S-75120 Uppsala,
Sweden
| | - Stenbjörn Styring
- Department of Photochemistry and
Molecular Science, Uppsala University,
P.O. Box 523, S-75120 Uppsala,
Sweden
| | - Anders Thapper
- Department of Photochemistry and
Molecular Science, Uppsala University,
P.O. Box 523, S-75120 Uppsala,
Sweden
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23
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Palopoli C, Bruzzo N, Hureau C, Ladeira S, Murgida D, Signorella S. Synthesis, Characterization, and Catalase Activity of a Water-Soluble diMnIII Complex of a Sulphonato-Substituted Schiff Base Ligand: An Efficient Catalyst for H2O2 Disproportionation. Inorg Chem 2011; 50:8973-83. [DOI: 10.1021/ic2011452] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Claudia Palopoli
- Departamento de Química Física/IQUIR-CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | - Natalia Bruzzo
- Departamento de Química Física/IQUIR-CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse, France
| | - Sonia Ladeira
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, F-31077 Toulouse, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse, France
- Institut de Chimie de Toulouse, FR2599, 118 route de Narbonne, F-31062 Toulouse, France
| | - Daniel Murgida
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Sandra Signorella
- Departamento de Química Física/IQUIR-CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
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Zhou DF, Chen QY, Qi Y, Fu HJ, Li Z, Zhao KD, Gao J. Anticancer Activity, Attenuation on the Absorption of Calcium in Mitochondria, and Catalase Activity for Manganese Complexes of N-Substituted Di(picolyl)amine. Inorg Chem 2011; 50:6929-37. [PMID: 21710973 DOI: 10.1021/ic200004y] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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25
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Stich TA, Whittaker JW, Britt RD. Multifrequency EPR studies of manganese catalases provide a complete description of proteinaceous nitrogen coordination. J Phys Chem B 2010; 114:14178-88. [PMID: 20055466 PMCID: PMC3418057 DOI: 10.1021/jp908064y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Pulse electron paramagnetic resonance (EPR) spectroscopy is employed at two very different excitation frequencies, 9.77 and 30.67 GHz, in the study of the nitrogen coordination environment of the Mn(III)Mn(IV) state of the dimanganese-containing catalases from Lactobacillus plantarum and Thermus thermophilus. Consistent with previous studies, the lower-frequency results reveal one unique histidine nitrogen-Mn cluster interaction. For the first time, a second, more strongly hyperfine-coupled (14)N atom is unambiguously observed through the use of higher frequency/higher field EPR spectroscopy. The low excitation frequency spectral features are rationalized as arising from the interaction of a histidine nitrogen that is bound to the Mn(IV) ion, and the higher excitation frequency features are attributed to the histidine nitrogen bound to the Mn(III) ion. These results allow for the computation of intrinsic hyperfine coupling constants, which range from 2.2 to 2.9 MHz, for sp(2)-hybridized nitrogens coordinating equatorially to high-valence Mn ions. The relevance of these findings is discussed in the context of recent results from analogous higher frequency EPR studies of the Mn cluster in photosystem II and other exchange-coupled, transition metal-containing systems.
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Affiliation(s)
- Troy A. Stich
- Department of Chemistry, University of California–Davis, One Shields Avenue, Davis, CA 95616
| | - James W. Whittaker
- Department of Science and Engineering, School of Medicine, Oregon Health and Science University, 20000 N.W. Walker Road, Beaverton, OR 97006
| | - R. David Britt
- Department of Chemistry, University of California–Davis, One Shields Avenue, Davis, CA 95616
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26
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Daier V, Moreno D, Duhayon C, Tuchagues JP, Signorella S. Synthesis, Characterization and Combined Superoxide Dismutase and Catalase Activities of Manganese Complexes of 1,4-Bis(salicylidenamino)butan-2-ol. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Madhu V, Ekambaram B, Shimon LJW, Diskin Y, Leitus G, Neumann R. Structural diversity in manganese, iron and cobalt complexes of the ditopic 1,2-bis(2,2′-bipyridyl-6-yl)ethyne ligand and observation of epoxidation and catalase activity of manganese compounds. Dalton Trans 2010; 39:7266-75. [DOI: 10.1039/b925129d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Pantazis DA, Krewald V, Orio M, Neese F. Theoretical magnetochemistry of dinuclear manganese complexes: broken symmetry density functional theory investigation on the influence of bridging motifs on structure and magnetism. Dalton Trans 2010; 39:4959-67. [DOI: 10.1039/c001286f] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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29
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Martínez D, Motevalli M, Watkinson M. Is there really a diagnostically useful relationship between the carbon-oxygen stretching frequencies in metal carboxylate complexes and their coordination mode? Dalton Trans 2009:446-55. [PMID: 20023980 DOI: 10.1039/b913865j] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An investigation into the relationship between the asymmetric and symmetric stretching modes of ancillary carboxylate ligands and their mode of binding in a family of manganese(III) complexes of tetradentate N(2)O(2) Schiff base ligands, which includes comparison of an (18)O isotopically labelled derivative, has been undertaken. The results suggest that caution should be employed in using this technique to assign the binding mode of the carboxylate ligands in these complexes despite its very extensive use in the literature.
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Affiliation(s)
- David Martínez
- The Joseph Priestley Building, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
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30
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Smith SJ, Riley MJ, Noble CJ, Hanson GR, Stranger R, Jayaratne V, Cavigliasso G, Schenk G, Gahan LR. Structural and Catalytic Characterization of a Heterovalent Mn(II)Mn(III) Complex That Mimics Purple Acid Phosphatases. Inorg Chem 2009; 48:10036-48. [DOI: 10.1021/ic9005086] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Christopher J. Noble
- Centre for Magnetic Resonance, The University of Queensland, Brisbane 4072, Australia
| | - Graeme R. Hanson
- Centre for Magnetic Resonance, The University of Queensland, Brisbane 4072, Australia
| | - Robert Stranger
- Research School of Chemistry, Australian National University, Canberra 0200, Australia
| | - Vidura Jayaratne
- Research School of Chemistry, Australian National University, Canberra 0200, Australia
| | - Germán Cavigliasso
- Research School of Chemistry, Australian National University, Canberra 0200, Australia
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31
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Lessa JA, Horn A, Bull ÉS, Rocha MR, Benassi M, Catharino RR, Eberlin MN, Casellato A, Noble CJ, Hanson GR, Schenk G, Silva GC, Antunes OAC, Fernandes C. Catalase vs Peroxidase Activity of a Manganese(II) Compound: Identification of a Mn(III)−(μ-O)2−Mn(IV) Reaction Intermediate by Electrospray Ionization Mass Spectrometry and Electron Paramagnetic Resonance Spectroscopy. Inorg Chem 2009; 48:4569-79. [DOI: 10.1021/ic801969c] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Josane A. Lessa
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Adolfo Horn
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Érika S. Bull
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Michelle R. Rocha
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Mario Benassi
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Rodrigo R. Catharino
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Marcos N. Eberlin
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Annelise Casellato
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Christoper J. Noble
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Graeme R. Hanson
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Gerhard Schenk
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Giselle C. Silva
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - O. A. C. Antunes
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
| | - Christiane Fernandes
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, 28013-602, Campos dos Goytacazes, RJ, Brazil, Laboratório ThoMSon de Espectrometria de Massas, Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, SP, Brazil, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia, Centre for Magnetic Resonance, The University of Queensland, St. Lucia, QLD 4072, Australia, and Instituto de Química, Universidade
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32
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Biava H, Palopoli C, Duhayon C, Tuchagues JP, Signorella S. Synthesis, Structure, and Catalase-Like Activity of Dimanganese(III) Complexes of 1,5-Bis[(2-hydroxy-5-X-benzyl)(2-pyridylmethyl)amino]pentan-3-ol (X = H, Br, OCH3). Inorg Chem 2009; 48:3205-14. [DOI: 10.1021/ic8019793] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hernán Biava
- Instituto de Química Rosario - CONICET, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina, and Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Claudia Palopoli
- Instituto de Química Rosario - CONICET, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina, and Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Carine Duhayon
- Instituto de Química Rosario - CONICET, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina, and Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Jean-Pierre Tuchagues
- Instituto de Química Rosario - CONICET, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina, and Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Sandra Signorella
- Instituto de Química Rosario - CONICET, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina, and Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
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33
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Oxidations by the system ‘hydrogen peroxide–[Mn2L2O3]2+ (L=1,4,7-trimethyl-1,4,7-triazacyclononane)–oxalic acid’. Part 11. Degradation of dye Rhodamine 6G and oxygenation of cyclohexene. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2008.10.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Jiang X, Liu H, Zheng B, Zhang J. Coordination modes of bridge carboxylates in dinuclear manganese compounds determine their catalase-like activities. Dalton Trans 2009:8714-23. [DOI: 10.1039/b907687e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Deeth RJ. General Molecular Mechanics Method for Transition Metal Carboxylates and its Application to the Multiple Coordination Modes in Mono- and Dinuclear Mn(II) Complexes. Inorg Chem 2008; 47:6711-25. [DOI: 10.1021/ic800313s] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert J. Deeth
- Inorganic Computational Chemistry Group, Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
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36
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Stock C, Heureux N, Browne W, Feringa B. Autonomous Movement of Silica and Glass Micro-Objects Based on a Catalytic Molecular Propulsion System. Chemistry 2008; 14:3146-53. [DOI: 10.1002/chem.200701227] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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de Boer JW, Browne WR, Harutyunyan SR, Bini L, Tiemersma-Wegman TD, Alsters PL, Hage R, Feringa BL. Manganese catalysed asymmetric cis-dihydroxylation with H2O2. Chem Commun (Camb) 2008:3747-9. [DOI: 10.1039/b808355j] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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39
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de Boer JW, Alsters PL, Meetsma A, Hage R, Browne WR, Feringa BL. The role of salicylic acid, l-ascorbic acid and oxalic acid in promoting the oxidation of alkenes with H2O2 catalysed by [MnIV2(O)3(tmtacn)2]2+. Dalton Trans 2008:6283-95. [DOI: 10.1039/b809177c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Molecular switches and motors are essential components of artificial molecular machines. In this perspective, we discuss progress in our design, synthesis, and functioning of photochemical and electrochemical switches and chemical and light-driven molecular motors. Special emphasis is given to the control of a range of functions and properties, including luminescence, self-assembly, motion, color, conductance, transport, and chirality. We will also discuss our efforts to control mechanical movement at the molecular level, a feature that is at the heart of molecular motors and machines. The anchoring of molecular motors on surfaces and molecular motors at work are discussed.
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Affiliation(s)
- Ben L Feringa
- Laboratory of Organic Chemistry, Stratingh Institute for Chemistry & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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41
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de Boer JW, Browne WR, Brinksma J, Alsters PL, Hage R, Feringa BL. Mechanism of Cis-Dihydroxylation and Epoxidation of Alkenes by Highly H2O2 Efficient Dinuclear Manganese Catalysts. Inorg Chem 2007; 46:6353-72. [PMID: 17608415 DOI: 10.1021/ic7003613] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the presence of carboxylic acids the complex [Mn(IV)2(micro-O)3(tmtacn)2]2+ (1, where tmtacn = N,N',N''-trimethyl-1,4,7-triazacyclononane) is shown to be highly efficient in catalyzing the oxidation of alkenes to the corresponding cis-diol and epoxide with H2O2 as terminal oxidant. The selectivity of the catalytic system with respect to (w.r.t.) either cis-dihydroxylation or epoxidation of alkenes is shown to be dependent on the carboxylic acid employed. High turnover numbers (t.o.n. > 2000) can be achieved especially w.r.t. cis-dihydroxylation for which the use of 2,6-dichlorobenzoic acid allows for the highest t.o.n. reported thus far for cis-dihydroxylation of alkenes catalyzed by a first-row transition metal and high efficiency w.r.t. the terminal oxidant (H2O2). The high activity and selectivity is due to the in situ formation of bis(micro-carboxylato)-bridged dinuclear manganese(III) complexes. Tuning of the activity of the catalyst by variation in the carboxylate ligands is dependent on both the electron-withdrawing nature of the ligand and on steric effects. By contrast, the cis-diol/epoxide selectivity is dominated by steric factors. The role of solvent, catalyst oxidation state, H2O, and carboxylic acid concentration and the nature of the carboxylic acid employed on both the activity and the selectivity of the catalysis are explored together with speciation analysis and isotope labeling studies. The results confirm that the complexes of the type [Mn2(micro-O)(micro-R-CO2)2(tmtacn)2]2+, which show remarkable redox and solvent-dependent coordination chemistry, are the resting state of the catalytic system and that they retain a dinuclear structure throughout the catalytic cycle. The mechanistic understanding obtained from these studies holds considerable implications for both homogeneous manganese oxidation catalysis and in understanding related biological systems such as dinuclear catalase and arginase enzymes.
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Affiliation(s)
- Johannes W de Boer
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, The Netherlands
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