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Maurya MR, MAURYA SK, Kumar NR, Avecilla F, Gupta PRAM. Synthesis of Dioxidomolybdenum(VI) Complexes of N,N,N’,N’‐Tetrakis(2‐Hydroxyl‐3,5‐Disubstitutedbenzyl)‐1,2‐Diaminoethane, Their Trans‐metalation to Oxidovanadium(V) Complexes and catalytic Application. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mannar R. Maurya
- Indian Institute of Technology Roorkee Department of Chemistry Indian Institute of Technology Roorkee 247 667 Roorkee INDIA
| | | | - Naveen Ram Kumar
- Indian Institute of Technology Roorkee Chemistry Department of Chemistry 247 667 Roorkee INDIA
| | | | - Puneet RAM Gupta
- Indian Institute of Technology Bombay Chemistry IIT Roorkee 247667 Roorkee INDIA
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2
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Gupta S, Singh N, Khan T, Joshi S. Thiosemicarbazone derivatives of transition metals as multi-target drugs: A review. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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3
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Nazari Haghighi Pashaki M, Choi TK, Rohwer EJ, Feurer T, Duhme-Klair AK, Gawelda W, Cannizzo A. Unveiling the origin of photo-induced enhancement of oxidation catalysis at Mo(VI) centres of Ru(II)-Mo(VI) dyads. Chem Commun (Camb) 2021; 57:4142-4145. [PMID: 33908495 DOI: 10.1039/d1cc00750e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photo-induced oxidation-enhancement in biomimetic bridged Ru(ii)-Mo(vi) photo-catalyst is unexpectedly photo-activated in ps timescales. One-photon absorption generates an excited state where both photo-oxidized and photo-reduced catalytic centres are activated simultaneously and independently.
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Affiliation(s)
| | - Tae-Kyu Choi
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Egmont J Rohwer
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland.
| | - Thomas Feurer
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland.
| | | | - Wojciech Gawelda
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain. and Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Campus Cantoblanco, 28049 Madrid, Spain and Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-614 Poznan, Poland
| | - Andrea Cannizzo
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland.
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4
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Ehweiner MA, Wiedemaier F, Belaj F, Mösch-Zanetti NC. Oxygen Atom Transfer Reactivity of Molybdenum(VI) Complexes Employing Pyrimidine- and Pyridine-2-thiolate Ligands. Inorg Chem 2020; 59:14577-14593. [PMID: 32951421 DOI: 10.1021/acs.inorgchem.0c02412] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Four dioxidomolybdenum(VI) complexes of the general structure [MoO2L2] employing the S,N-bidentate ligands pyrimidine-2-thiolate (PymS, 1), pyridine-2-thiolate (PyS, 2), 4-methylpyridine-2-thiolate (4-MePyS, 3) and 6-methylpyridine-2-thiolate (6-MePyS, 4) were synthesized and characterized by spectroscopic means and single-crystal X-ray diffraction analysis (2-4). Complexes 1-4 were reacted with PPh3 and PMe3, respectively, to investigate their oxygen atom transfer (OAT) reactivity and catalytic applicability. Reduction with PPh3 leads to symmetric molybdenum(V) dimers of the general structure [Mo2O3L4] (6-9). Kinetic studies showed that the OAT from [MoO2L2] to PPh3 is 5 times faster for the PymS system than for the PyS and 4-MePyS systems. The reaction of complexes 1-3 with PMe3 gives stable molybdenum(IV) complexes of the structure [MoOL2(PMe3)2] (10-12), while reduction of [MoO2(6-MePyS)2] (4) yields [MoO(6-MePyS)2(PMe3)] (13) with only one PMe3 coordinated to the metal center. The activity of complexes 1-4 in catalytic OAT reactions involving Me2SO and Ph2SO as oxygen donors and PPh3 as an oxygen acceptor has been investigated to assess the influence of the varied ligand frameworks on the OAT reaction rates. It was found that [MoO2(PymS)2] (1) and [MoO2(6-MePyS)2] (4) are similarly efficient catalysts, while complexes 2 and 3 are only moderately active. In the catalytic oxidation of PMe3 with Me2SO, complex 4 is the only efficient catalyst. Complexes 1-4 were also found to catalytically reduce NO3- with PPh3, although their reactivity is inhibited by further reduced species such as NO, as exemplified by the formation of the nitrosyl complex [Mo(NO)(PymS)3] (14), which was identified by single-crystal X-ray diffraction analysis. Computed ΔG⧧ values for the very first step of the OAT were found to be lower for complexes 1 and 4 than for 2 and 3, explaining the difference in catalytic reactivity between the two pairs and revealing the requirement for an electron-deficient ligand system.
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Affiliation(s)
- Madeleine A Ehweiner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Fabian Wiedemaier
- Institute of Chemistry, Physical and Theoretical Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
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5
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Synthesis, structural insights and catalytic activity of a dioxidomolybdenum(VI) complex chelated with N4-(3-methoxyphenyl) thiosemicarbazone. TRANSIT METAL CHEM 2020. [DOI: 10.1007/s11243-020-00398-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Asha T, Sithambaresan M, Prathapachandra Kurup M. Dioxidomolybdenum(VI) complexes chelated with N4-(3-methoxyphenyl)thiosemicarbazone as molybdenum(IV) precursors in oxygen atom transfer process and oxidation of styrene. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Roy S, Saswati, Lima S, Dhaka S, Maurya MR, Acharyya R, Eagle C, Dinda R. Synthesis, structural studies and catalytic activity of a series of dioxidomolybdenum(VI)-thiosemicarbazone complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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8
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Elrod LT, Kim E. Lewis Acid Assisted Nitrate Reduction with Biomimetic Molybdenum Oxotransferase Complex. Inorg Chem 2018; 57:2594-2602. [PMID: 29443517 DOI: 10.1021/acs.inorgchem.7b02956] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reduction of nitrate (NO3-) to nitrite (NO2-) is of significant biological and environmental importance. While MoIV(O) and MoVI(O)2 complexes that mimic the active site structure of nitrate reducing enzymes are prevalent, few of these model complexes can reduce nitrate to nitrite through oxygen atom transfer (OAT) chemistry. We present a novel strategy to induce nitrate reduction chemistry of a previously known catalyst MoIV(O)(SN)2 (2), where SN = bis(4- tert-butylphenyl)-2-pyridylmethanethiolate, that is otherwise incapable of achieving OAT with nitrate. Addition of nitrate with the Lewis acid Sc(OTf)3 (OTf = trifluoromethanesulfonate) to 2 results in an immediate and clean conversion of 2 to MoVI(O)2(SN)2 (1). The Lewis acid additive further reacts with the OAT product, nitrite, to form N2O and O2. This work highlights the ability of Sc3+ additives to expand the reactivity scope of an existing MoIV(O) complex together with which Sc3+ can convert nitrate to stable gaseous molecules.
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Affiliation(s)
- Lee Taylor Elrod
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Eunsuk Kim
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
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9
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Saswati, Roy S, Dash SP, Acharyya R, Kaminsky W, Ugone V, Garribba E, Harris C, Lowe JM, Dinda R. Chemistry of oxidomolybdenum(IV) and -(VI) complexes with ONS donor ligands: Synthesis, computational evaluation and oxo-transfer reactions. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.12.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Maurya MR, Mengesha B, Uprety B, Jangra N, Tomar R, Avecilla F. Oxygen atom transfer between DMSO and benzoin catalyzed by cis-dioxidomolybdenum(vi) complexes of tetradentate Mannich bases. NEW J CHEM 2018. [DOI: 10.1039/c7nj03551a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dioxidomolybdenum(vi) complexes of tetradentate ONNO donor Mannich base ligands for the catalytic oxygen atom transfer between benzoin and DMSO are reported.
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Affiliation(s)
- Mannar R. Maurya
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Bekele Mengesha
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Bhawna Uprety
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Nancy Jangra
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Reshu Tomar
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Fernando Avecilla
- Grupo Xenomar
- Centro de Investigacións Científicas Avanzadas (CICA)
- Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
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11
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Acid-facilitated product release from a Mo(IV) center: relevance to oxygen atom transfer reactivity of molybdenum oxotransferases. J Biol Inorg Chem 2017; 23:193-207. [PMID: 29177705 DOI: 10.1007/s00775-017-1518-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 11/10/2017] [Indexed: 01/27/2023]
Abstract
We report that pyridinium ions (HPyr+) accelerate the conversion of [Tp*MoIVOCl(OPMe3)] (1) to [Tp*MoIVOCl(NCCH3)] (2) by 103-fold, affording 2 in near-quantitative yield; Tp* = hydrotris(3,5-dimethyl-1-pyrazolyl)borate. This novel reactivity and the mechanism of this reaction were investigated in detail. The formation of 2 followed pseudo-first-order kinetics, with the observed pseudo-first-order rate constant (k obs) linearly correlated with [HPyr+]. An Eyring plot revealed that this HPyr+-facilitated reaction has a small positive value of ∆S ‡ indicative of a dissociative interchange (Id) mechanism, different from the slower associative interchange (Ia) mechanism in the absence of HPyr+ marked with a negative ∆S ‡. Interestingly, log(k obs) was found to be linearly correlated to the acidity of substituted pyridinium ions. This novel reactivity is further investigated using combined DFT and ab initio coupled cluster methods. Different reaction pathways, including Id, Ia, and possible alternative routes in the absence or presence of HPyr+, were considered, and enthalpy and free energies were calculated for each pathway. Our computational results further underscored that the Id route is energetically favored in the presence of HPyr+, in contrast with the preferred Ia-NNO pathway in the absence of HPyr+. Our computational results also revealed molecular-level details for the HPyr+-facilitated Id route. Specifically, HPyr+ initially becomes hydrogen-bonded to the oxygen atom of the Mo(IV)-OPMe3 moiety, which lowers the activation barrier for the Mo-OPMe3 bond cleavage in a rate-limiting step to dissociate the OPMe3 product. The implications of our results were discussed in the context of molybdoenzymes, particularly the reductive half-reaction of sulfite oxidase.
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Bikas R, Lippolis V, Noshiranzadeh N, Farzaneh-Bonab H, Blake AJ, Siczek M, Hosseini-Monfared H, Lis T. Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)-Hydrazone Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601359] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Rahman Bikas
- Department of Chemistry; Faculty of Sciences; University of Zanjan; 45195-313 Zanjan Iran
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Cagliari S.S.; 554 Bivio per Sestu 09042 Monserrato Italy
| | - Nader Noshiranzadeh
- Department of Chemistry; Faculty of Sciences; University of Zanjan; 45195-313 Zanjan Iran
| | - Hossein Farzaneh-Bonab
- Department of Chemistry; Faculty of Sciences; University of Zanjan; 45195-313 Zanjan Iran
| | - Alexander J. Blake
- School of Chemistry; The University of Nottingham; University Park NG7 2RD Nottingham UK
| | - Milosz Siczek
- Faculty of Chemistry; University of Wroclaw; Joliot-Curie 14 50-383 Wroclaw Poland
| | | | - Tadeusz Lis
- Faculty of Chemistry; University of Wroclaw; Joliot-Curie 14 50-383 Wroclaw Poland
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Maurya MR, Rana L, Avecilla F. Molybdenum complexes with a μ-O{MoO2}2 core: their synthesis, crystal structure and application as catalysts for the oxidation of bicyclic alcohols using N-based additives. NEW J CHEM 2017. [DOI: 10.1039/c6nj03162e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Binuclear molybdenum(vi) complexes with a μ-O{MoO2}2 core as catalysts for the oxidation of bicyclic alcohols (fenchyl alcohol and isoborneol), using 30% H2O2 as the oxidant in the presence of NEt3 as the additive, are reported.
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Affiliation(s)
- Mannar R. Maurya
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee 247667
- India
| | - Lata Rana
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee 247667
- India
| | - Fernando Avecilla
- Departamento de Química Fundamental
- Universidade da Coruña
- Campus de A Zapateira
- 15071 A Coruña
- Spain
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14
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Ducrot AB, Coulson BA, Perutz RN, Duhme-Klair AK. Light-Induced Activation of a Molybdenum Oxotransferase Model within a Ru(II)-Mo(VI) Dyad. Inorg Chem 2016; 55:12583-12594. [PMID: 27690401 DOI: 10.1021/acs.inorgchem.6b01485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nature uses molybdenum-containing enzymes to catalyze oxygen atom transfer (OAT) from water to organic substrates. In these enzymes, the two electrons that are released during the reaction are rapidly removed, one at a time, by spatially separated electron transfer units. Inspired by this design, a Ru(II)-Mo(VI) dyad was synthesized and characterized, with the aim of accelerating the rate-determining step in the cis-dioxo molybdenum-catalyzed OAT cycle, the transfer of an oxo ligand to triphenyl phosphine, via a photo-oxidation process. The dyad consists of a photoactive bis(bipyridyl)-phenanthroline ruthenium moiety that is covalently linked to a bioinspired cis-dioxo molybdenum thiosemicarbazone complex. The quantum yield and luminescence lifetimes of the dyad [Ru(bpy)2(L2)MoO2(solv)]2+ were determined. The major component of the luminescence decay in MeCN solution (τ = 1149 ± 2 ns, 67%) corresponds closely to the lifetime of excited [Ru(bpy)2(phen-NH2)]2+, while the minor component (τ = 320 ± 1 ns, 31%) matches that of [Ru(bpy)2(H2-L2)]2+. In addition, the (spectro)electrochemical properties of the system were investigated. Catalytic tests showed that the dyad-catalyzed OAT from dimethyl sulfoxide to triphenyl phosphine proceeds significantly faster upon irradiation with visible light than in the dark. Methylviologen acts as a mediator in the photoredox cycle, but it is regenerated and hence only required in stoichiometric amounts with respect to the catalyst rather than sacrificial amounts. It is proposed that oxidative quenching of the photoexcited Ru unit, followed by intramolecular electron transfer, leads to the production of a reactive one-electron oxidized catalyst, which is not accessible by electrochemical methods. A significant, but less pronounced, rate enhancement was observed when an analogous bimolecular system was tested, indicating that intramolecular electron transfer between the photosensitizer and the catalytic center is more efficient than intermolecular electron transfer between the separate components.
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Affiliation(s)
- Aurélien B Ducrot
- Department of Chemistry, University of York , Heslington, York YO10 5DD, United Kingdom
| | - Ben A Coulson
- Department of Chemistry, University of York , Heslington, York YO10 5DD, United Kingdom
| | - Robin N Perutz
- Department of Chemistry, University of York , Heslington, York YO10 5DD, United Kingdom
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Maurya MR, Uprety B, Avecilla F. Dioxidomolybdenum(VI) Complexes of Tripodal Tetradentate Ligands for Catalytic Oxygen Atom Transfer between Benzoin and Dimethyl Sulfoxide and for Oxidation of Pyrogallol. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600694] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mannar R. Maurya
- Department of Chemistry; Indian Institute of Technology Roorkee; 247667 Roorkee India
| | - Bhawna Uprety
- Department of Chemistry; Indian Institute of Technology Roorkee; 247667 Roorkee India
| | - Fernando Avecilla
- Departamento de Química Fundamental; Universidade da Coruña; Campus de A Zapateira 15071 A Coruña Spain
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