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Banerjee A, Tolla AS, Stjepanovic S, Sevilla MD, Goodsell JL, Angerhofer A, Brennessel WW, Loloee R, Chavez FA. Structural, Spectroscopic, Electrochemical, and Magnetic Properties for Manganese(II) Triazamacrocyclic Complexes. Inorganica Chim Acta 2019; 486:546-555. [PMID: 33981118 PMCID: PMC8112617 DOI: 10.1016/j.ica.2018.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the synthesis of [Mn(tacud)2](OTf)2 (1) (tacud = 1,4,8-triazacycloundecane), [Mn(tacd)2](OTf)2 (2) (tacd = 1,4,7-triazacyclodecane), and [Mn(tacn)2](OTf)2 (3) (tacn = 1,4,7-triazacyclononane). Electrochemical measurements on the MnIII/II redox couple show that complex 1 has the largest anodic potential of the set (E 1/2 = 1.16 V vs NHE, ΔE p = 106 mV) compared to 2 (E 1/2 = 0.95 V, ΔE p = 108 mV) and 3 (E 1/2 = 0.93 V, ΔE p = 96 mV). This is due to the fact that 1 has the fewest 5-membered chelate rings and thus is least stabilized. Magnetic studies of 1-3 revealed that all complexes remain high spin throughout the temperature range investigated (2 - 300 K). X-band EPR investigations in methanol glass indicated that the manganese(II) centers for 2 and 3 resided in a more distorted octahedral geometric configuration compared to 1. To ease spectral interpretation and extract ZFS parameters, we performed high-frequency high-field EPR (HFEPR) at frequencies above 200 GHz and a field of 7.5 T. Simulation of the spectral data yielded g = 2.0013 and D = -0.031 cm-1 for 1, g = 2.0008, D = -0.0824 cm-1, |E/D| = 0.12 for 2, and g = 2.00028, D = -0.0884 cm-1 for 3. These results are consistent with 3 possessing the most distorted geometry. Calculations (PBE0/6-31G(d)) were performed on 1-3. Results show that 1 has the largest HOMO-LUMO gap energy (6.37 eV) compared to 2 (6.12 eV) and 3 (6.26 eV). Complex 1 also has the lowest HOMO energies indicating higher stability.
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Affiliation(s)
- Atanu Banerjee
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | - Azam S Tolla
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | | | - Michael D Sevilla
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | - Justin L Goodsell
- Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
| | | | | | - Reza Loloee
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-1322, USA
| | - Ferman A Chavez
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
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2
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Vertregt F, Torrelo G, Trunk S, Wiltsche H, Hagen WR, Hanefeld U, Steiner K. EPR Study of Substrate Binding to Mn(II) in Hydroxynitrile Lyase from Granulicella tundricola. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01204] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Femke Vertregt
- Biokatalyse,
Afdeling Biotechnologie, Technische Universiteit Delft, van der Maasweg
9, 2629HZ Delft, The Netherlands
| | - Guzman Torrelo
- Biokatalyse,
Afdeling Biotechnologie, Technische Universiteit Delft, van der Maasweg
9, 2629HZ Delft, The Netherlands
| | - Sarah Trunk
- Austrian Centre
of Industrial Biotechnology GmbH, Petersgasse
14/4, 8010 Graz, Austria
| | - Helmar Wiltsche
- Institute
of Analytical Chemistry and Food Chemistry, TU Graz, Stremayrgasse
9/III, 8010 Graz, Austria
| | - Wilfred R. Hagen
- Biokatalyse,
Afdeling Biotechnologie, Technische Universiteit Delft, van der Maasweg
9, 2629HZ Delft, The Netherlands
| | - Ulf Hanefeld
- Biokatalyse,
Afdeling Biotechnologie, Technische Universiteit Delft, van der Maasweg
9, 2629HZ Delft, The Netherlands
| | - Kerstin Steiner
- Austrian Centre
of Industrial Biotechnology GmbH, Petersgasse
14/4, 8010 Graz, Austria
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3
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Synthesis, structural determination, theoretical studies and catalytic activity of Mn(II) complex of N-isonicotinyl phosphoric triamide ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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4
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Conradie J, Patra AK, Harrop TC, Ghosh A. Square-Antiprismatic Eight-Coordinate Complexes of Divalent First-Row Transition Metal Cations: A Density Functional Theory Exploration of the Electronic–Structural Landscape. Inorg Chem 2015; 54:1375-83. [DOI: 10.1021/ic502287m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jeanet Conradie
- Department
of Chemistry and Center for Theoretical and Computational Chemistry, University of Tromsø, 9037 Tromsø, Norway
- Department
of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa
| | - Ashis K. Patra
- Department
of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, Athens, Georgia 30602, United States
| | - Todd C. Harrop
- Department
of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, Athens, Georgia 30602, United States
| | - Abhik Ghosh
- Department
of Chemistry and Center for Theoretical and Computational Chemistry, University of Tromsø, 9037 Tromsø, Norway
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Rezaeivala M, Keypour H. Schiff base and non-Schiff base macrocyclic ligands and complexes incorporating the pyridine moiety – The first 50 years. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.06.007] [Citation(s) in RCA: 173] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Gholivand K, Rajabi M, Molaei F, Mahzouni HR, Farshadian S. A 3-D Mn(II) complex containing N-isonicotinyl, N′,N′′-bis(hexamethylenyl) phosphoric triamide ligand: synthesis, structural characterization, and thermal studies. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.863879] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Khodayar Gholivand
- Faculty of Sciences, Department of Chemistry, Tarbiat Modares University, Tehran, Iran
| | - Maryam Rajabi
- Faculty of Sciences, Department of Chemistry, Tarbiat Modares University, Tehran, Iran
| | - Foroogh Molaei
- Faculty of Sciences, Department of Chemistry, Tarbiat Modares University, Tehran, Iran
| | - Hamid Reza Mahzouni
- Faculty of Sciences, Department of Chemistry, Tarbiat Modares University, Tehran, Iran
| | - Sedigheh Farshadian
- Faculty of Sciences, Department of Chemistry, Tarbiat Modares University, Tehran, Iran
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Alexandru M, Cazacu M, Arvinte A, Shova S, Turta C, Simionescu BC, Dobrov A, Alegria ECBA, Martins LMDRS, Pombeiro AJL, Arion VB. μ-Chlorido-Bridged Dimanganese(II) Complexes of the Schiff Base Derived from [2+2] Condensation of 2,6-Diformyl-4-methylphenol and 1,3-Bis(3-aminopropyl)tetramethyldisiloxane: Structure, Magnetism, Electrochemical Behaviour, and Catalytic Oxidation of Sec. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300969] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Dube KS, Harrop TC. Structure and properties of an eight-coordinate Mn(II) complex that demonstrates a high water relaxivity. Dalton Trans 2011; 40:7496-8. [PMID: 21701736 DOI: 10.1039/c1dt10579e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An air-stable eight-coordinate (8C) Mn(II)N(8) complex has been synthesized utilizing an N(4) imidazole/imine ligand. The 8C dodecahedral geometry is structurally robust as the Mn complex is stable to air, NO(g), and potential coordinating anions. The structural, spectroscopic and water relaxivity properties of this complex are reported.
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Affiliation(s)
- Koustubh S Dube
- Department of Chemistry, The University of Georgia, 1001 Cedar Street, Athens, GA 30602, USA.
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Pawlak PL, Panda M, Loloee R, Kucera BE, Costes JP, Tuchagues JP, Chavez FA. New binuclear MnII and FeII complexes supported by 1,4,8-triazacycloundecane. Dalton Trans 2011; 40:2926-31. [DOI: 10.1039/c0dt01379j] [Citation(s) in RCA: 12] [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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Bräuer B, Schaarschmidt D, Flohrer C, Rüffer T, Tripke S, Hildebrandt A, Walfort B, Sorace L, Lang H. A dimanganese(II) complex with bridging chlorides: Synthesis, electrochemistry, magnetic behavior, structure and bonding. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.09.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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