1
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Ocansey E, Sala O, Kamm M, Joost M, Bokern S, Rominger F, Hashmi ASK, Mormul J, Schaub T. Mn(III) O^N^O Complexes as Water-tolerant and Environmentally Benign Catalysts for Polyurethane Foam Synthesis. Chemistry 2023:e202303736. [PMID: 38133651 DOI: 10.1002/chem.202303736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/22/2023] [Accepted: 12/22/2023] [Indexed: 12/23/2023]
Abstract
Polyurethanes are synthesized on industrial scale by the reaction of diisocyanates with diols in the presence of catalysts which are commonly based on tin complexes and amines. However, due to the toxicity and volatility of these tin catalysts and amines, there is the need to develop new catalysts that are more environmentally benign. Herein, we report the synthesis of O^N^O pincer-ligated Mn(III) and Fe(III) complexes that serve as suitable catalysts for urethane formation and are stable to hydrolysis as predicted by computations and observed experimentally. The O^N^O pincer scaffold is vital to the activity of these catalysts, simultaneously ensuring increased solubility in the reaction medium as well as providing a stable framework upon dissociation of co-ligands in the catalytic cycle. In silico mechanistic investigations for urethane formation show that the stabilization of active species in square-planar geometries enabled by these O^N^O ligands permit the simultaneous coordination of alcohol and isocyanate in suitable configuration at the metal center.
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Affiliation(s)
- Edward Ocansey
- Catalysis Research Laboratory (CaRLa), University of Heidelberg University, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
| | - Oliver Sala
- BASF SE, Carl-Bosch-Straße 38, 67056, Ludwigshafen, Germany
| | - Marina Kamm
- BASF Polyurethanes GmbH, Elastogranstr. 60, 49448, Lemfoerde, Germany
| | | | - Stefan Bokern
- BASF Polyurethanes GmbH, Elastogranstr. 60, 49448, Lemfoerde, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Jaroslaw Mormul
- Catalysis Research Laboratory (CaRLa), University of Heidelberg University, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
- BASF SE, Carl-Bosch-Straße 38, 67056, Ludwigshafen, Germany
| | - Thomas Schaub
- Catalysis Research Laboratory (CaRLa), University of Heidelberg University, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
- BASF SE, Carl-Bosch-Straße 38, 67056, Ludwigshafen, Germany
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2
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Rams M, Lohmiller T, Böhme M, Jochim A, Foltyn M, Schnegg A, Plass W, Näther C. Weakening the Interchain Interactions in One Dimensional Cobalt(II) Coordination Polymers by Preventing Intermolecular Hydrogen Bonding. Inorg Chem 2023. [PMID: 37319419 DOI: 10.1021/acs.inorgchem.3c01324] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The reaction of Co(NCS)2 with N-methylaniline leads to the formation of [Co(NCS)2(N-methylaniline)2]n (1), in which the cobalt(II) cations are octahedrally coordinated and linked into linear chains by pairs of thiocyanate anions. In contrast to [Co(NCS)2(aniline)2]n (2) reported recently, in which the Co(NCS)2 chains are linked by strong interchain N-H···S hydrogen bonding, such interactions are absent in 1. Computational studies reveal that the cobalt(II) ions in compound 1 show an easy-axis anisotropy that is lower than in 2, but with the direction of the easy axis being similar in both compounds. The high magnetic anisotropy is also confirmed by magnetic and FD-FT THz-EPR spectroscopy, which yield a consistent gz value. These investigations prove that the intrachain interactions in 1 are slightly higher than in 2. Magnetic measurements reveal that the critical temperature for magnetic ordering in 1 is significantly lower than in 2, which indicates that the elimination of the hydrogen bonds leads to a weakening of the interchain interactions. This is finally proven by FD-FT THz-EPR experiments, which show that the interchain interaction energy in the N-methylaniline compound 1 is nine-fold smaller than in the aniline compound 2.
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Affiliation(s)
- Michał Rams
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489 Berlin, Germany
| | - Michael Böhme
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Aleksej Jochim
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Magdalena Foltyn
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489 Berlin, Germany
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim Ruhr, Germany
| | - Winfried Plass
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
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3
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A monomeric iron(III) compound containing N-(2-pyridylmethyl)iminodiisopropanolate and thiocyanato ligands: structure, magnetic and catalytic properties. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Parts-Per-Million (Salen)Fe(III) Homogeneous Catalysts for the Production of Biodiesel from Waste Cooking Oils. Catal Letters 2022. [DOI: 10.1007/s10562-022-03948-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
AbstractThis work describes the application of a library of iron(III)-salen catalysts in the production of biodiesel from vegetable oils. The conversion of neutral soybean oil is complete within two hours at 160–180 °C with low catalyst loading (0.10 mol%). A comparative screening reveals that the catalysts containing acetate as a fifth ligand are the most performing, and these have been conveniently used to convert acidic and waste cooking oils (WCO). WCOs were used as received without further purification to produce biodiesel in high yield (85–90%) under optimized conditions (2 h at 180 °C, catalyst loading 0.1 mol%, oil to alcohol molar ratio 1:20). The iron content in the lipophilic and hydrophilic phases of the crude mixture was investigated and the residual concentration in biodiesel was found to be in the order of 10–14 ppm, comparable to that contained in biodiesels from other sources.
Graphical Abstract
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5
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Taha ZA, Hijazi AK, Al-Smadi AY, Al-Momani WM, Wedian F. Lanthanide Complexes with N,N-Bis-(2-hydroxy-5-nitrobenzylidene)-1,2-phenylenediamine Schiff Base Ligand: Synthesis, Characterization, Photophysical Properties, and Biological Activity. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221110177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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6
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Buta I, Ardelean A, Lönnecke P, Novitchi G, Hey-Hawkins E, Andruh M, Costisor O. Structural and magnetic properties of three one-dimensional nitrato-, azido- and phenoxido-bridged copper(II) coordination polymers. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114766] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Halogen Bonding in New Dichloride-Cobalt(II) Complex with Iodo Substituted Chalcone Ligands. CRYSTALS 2020. [DOI: 10.3390/cryst10050354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The synthesis and properties of new chalcone ligand 4I-L ((2E)-1-[4-(1H-imidazol-1-yl)phenyl]-3-(4-iodophenyl)prop-2-en-1-one) and tetracoordinate Co(II) complex [Co(4I-L)2Cl2], (1a), are reported in this article. Upon recrystallization of 1a, the single crystals of [Co(4I-L)4Cl2]·2DMF·3Et2O (1b) were obtained and crystal structure was determined using X-ray diffraction. The non-covalent interactions in 1b were thoroughly analyzed and special attention was dedicated to interactions formed by the peripheral iodine substituents. The density functional theory (DFT), atoms in molecule (AIM) and noncovalent interaction (NCI) methods and electronic localization function (ELF) calculations were used to investigate halogen bond formed between the iodine functional groups and co-crystallized molecules of diethyl ether.
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8
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Lan W, Wang X, Yang L, Si W, Zhuang S, Liu H, Liu Q, Zhang D. Cyanide-bridged polynuclear heterobimetallic complexes: synthesis, crystal structures, and magnetic properties. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00304-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Bi J, Dong Y, Meng D, Zhu D, Li T. The study and application of three highly porous hyper-crosslinked catalysts possessing similar catalytic centers. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Nemec I, Zoufalý P, Jewula P, Antal P, Linert W, Herchel R. Ion-pair complexes of Schiff base Fe(iii) cations and complex anions. NEW J CHEM 2019. [DOI: 10.1039/c9nj00192a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on the crystal structure and magnetic properties of four new ion-pair complexes.
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Affiliation(s)
- Ivan Nemec
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
| | - Pavel Zoufalý
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
| | - Pawel Jewula
- Central European Institute of Technology
- CEITEC BUT
- Brno
- Czech Republic
| | - Peter Antal
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
| | - Wolfgang Linert
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- 1060 Vienna
- Austria
| | - Radovan Herchel
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
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11
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Bazhina ES, Gogoleva NV, Aleksandrov GG, Kiskin MA, Efimov NN, Bogomyakov AS, Ugolkova EA, Minin VV, Sidorov AA, Eremenko IL. Binding Features of {M(3d)(cbdc)2
} Blocks (M(3d)=VIV
O, CuII
; cbdc2-
=Dianion of Cyclobutane-1,1-Dicarboxylic Acid) in Formation of Heterometallic Structures with d-Metal Cations. ChemistrySelect 2018. [DOI: 10.1002/slct.201803365] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Evgeniya S. Bazhina
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Natalia V. Gogoleva
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Grigory G. Aleksandrov
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Mikhail A. Kiskin
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Nikolay N. Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center; Siberian Branch of the Russian Academy of Sciences; Institutskaya St. 3a Novosibirsk 630090 Russian Federation
| | - Elena A. Ugolkova
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Vadim V. Minin
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Alexey A. Sidorov
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
| | - Igor L. Eremenko
- N.S. Kurnakov Institute of General and Inorganic Chemistry; the Russian Academy of Sciences; Leninsky Prosp. 31 Moscow 119991 Russian Federation
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12
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Farris PC, Wall AD, Chellali JE, Chittim CL, Landee CP, Turnbull MM, Wikaira JL. Copper(II) halide complexes of aminopyridines: Syntheses, structures and magnetic properties of [(5CAP)2CuX2] and [(5BAP)nCuX2] (X = Cl, Br). J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1499901] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Penelope C. Farris
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
| | - Alexander D. Wall
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
| | - Jonathan E. Chellali
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
| | - Carina L. Chittim
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
| | | | - Mark M. Turnbull
- Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
| | - Jan L. Wikaira
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch New Zealand
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13
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Martínez L, Arizaga L, Armentano D, Lloret F, González R, Kremer C, Chiozzone R. Synthesis, characterization and magnetic properties of mixed-valence iron complexes with 2-pyridyl oximes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1441405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Lorena Martínez
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Livia Arizaga
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Donatella Armentano
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Cosenza, Italy
| | - Francesc Lloret
- Departament de Química Inorgánica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, València, Spain
| | - Ricardo González
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Carlos Kremer
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Raúl Chiozzone
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
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14
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A Cryptand-Type Aluminum Tris(salophen) Complex: Synthesis, Characterization, and Cell Imaging Application. INORGANICS 2018. [DOI: 10.3390/inorganics6010020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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15
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Pagès JM, Escriche-Tur L, Font-Bardia M, Aullón G, Corbella M. Indirect effect of hydrogen bonds on the magnetic coupling on Mn( iii) dinuclear compounds. CrystEngComm 2018. [DOI: 10.1039/c8ce01194j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hydrogen bonds between the cationic complex and counteranion weaken the antiferromagnetic interaction.
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Affiliation(s)
- J. M. Pagès
- Departament de Química Inorgànica i Orgànica (Secció Química Inorgànica)
- Facultat de Química
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - L. Escriche-Tur
- Departament de Química Inorgànica i Orgànica (Secció Química Inorgànica)
- Facultat de Química
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - M. Font-Bardia
- Departament de Mineralogia
- Petrologia i Geologia Aplicada
- Facultat de Ciències de la Terra
- Universitat de Barcelona
- 08028 Barcelona
| | - G. Aullón
- Departament de Química Inorgànica i Orgànica (Secció Química Inorgànica)
- Facultat de Química
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - M. Corbella
- Departament de Química Inorgànica i Orgànica (Secció Química Inorgànica)
- Facultat de Química
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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16
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Ebrahimipour SY, Mohamadi M, Torkzadeh Mahani M, Simpson J, Mague JT, Sheikhshoaei I. Synthesis and structure elucidation of novel salophen-based dioxo-uranium(VI) complexes: In-vitro and in-silico studies of their DNA/BSA-binding properties and anticancer activity. Eur J Med Chem 2017; 140:172-186. [DOI: 10.1016/j.ejmech.2017.08.068] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/19/2017] [Accepted: 08/30/2017] [Indexed: 01/11/2023]
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17
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Aissaoui T, Benguerba Y, AlOmar MK, AlNashef IM. Computational investigation of the microstructural characteristics and physical properties of glycerol-based deep eutectic solvents. J Mol Model 2017; 23:277. [DOI: 10.1007/s00894-017-3450-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/28/2017] [Indexed: 02/05/2023]
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18
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Granelli M, Downward AM, Huber R, Guénée L, Besnard C, Krämer KW, Decurtins S, Liu SX, Thompson LK, Williams AF. Dinuclear Complexes Formed by Hydrogen Bonds: Synthesis, Structure and Magnetic and Electrochemical Properties. Chemistry 2017; 23:7104-7112. [PMID: 28317198 DOI: 10.1002/chem.201700591] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Indexed: 11/06/2022]
Abstract
The synthesis is reported of a series of homo- and hetero-dinuclear octahedral complexes of the ligand 1, 1,2-bis(1-methyl-benzimidazol-2-yl) ethanol, where the two metal centres are linked by hydrogen bonds between coordinated alcohols and coordinated alkoxides. Homonuclear divalent MII MII , mixed-valent MII MIII and heteronuclear MII M'III species are prepared. The complexes have been characterised by X-ray crystallography and show unusually short O⋅⋅⋅O distances for the hydrogen bonds. Magnetic measurements show the hydrogen-bond bridges can lead to ferromagnetic or antiferromagnetic coupling. The electrochemistry of the dinuclear species is significantly different from the mononuclear systems: the latter show irreversible waves in cyclic voltammograms as a result of the need to couple proton and electron transfer. The dinuclear species, in contrast, show reversible waves, which are attributed to rapid intramolecular proton transfer facilitated by the hydrogen-bonded structure.
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Affiliation(s)
- Matteo Granelli
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
| | - Alan M Downward
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
| | - Robin Huber
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
| | - Laure Guénée
- Laboratory for X-ray Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratory for X-ray Crystallography, University of Geneva, 24 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
| | - Karl W Krämer
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Silvio Decurtins
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Shi-Xia Liu
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Laurence K Thompson
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada
| | - Alan F Williams
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211, Geneva 4, Switzerland
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19
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Li LH, Dong WK, Zhang Y, Akogun SF, Xu L. Syntheses, structures and catecholase activities of homo- and hetero-trinuclear cobalt(II) complexes constructed from an acyclic naphthalenediol-based bis(Salamo)-type ligand. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3818] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Li-Hong Li
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Wen-Kui Dong
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Yang Zhang
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Sunday Folaranmi Akogun
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Li Xu
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
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20
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Tuning of Exchange Coupling and Switchable Magnetization Dynamics by Displacing the Bridging Ligands Observed in Two Dimeric Manganese(III) Compounds. Sci Rep 2017; 7:44982. [PMID: 28322305 PMCID: PMC5359551 DOI: 10.1038/srep44982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 02/16/2017] [Indexed: 01/13/2023] Open
Abstract
Two Mn(III)-based dimers, [Mn2(bpad)2(CH3O)4]n (1) and [Mn2(bpad)2(pa)2]n·2H2O (2) (Hbpad = N3-benzoylpyridine-2-carboxamidrazone, H2pa = phthalic acid), have been assembled from a tridentate Schiff-base chelator and various anionic coligands. Noteworthily, compound 1 could be identified as a reaction precursor to transform to 2 in the presence of phthalic acid, resulting in a rarely structural conversion process in which the bridges between intradimer Mn(III) ions alter from methanol oxygen atom with μ2-O mode in 1 (Mn Mn distance of 3.046 Å) to syn-anti carboxylate in 2 (Mn Mn distance of 4.043 Å), while the Mn(III) centers retain hexa-coordinated geometries with independently distorted octahedrons in two compounds. The dc magnetic determinations reveal that ferromagnetic coupling between two metal centers with J = 1.31 cm−1 exists in 1, whereas 2 displays weak antiferromagnetic interactions with the coupling constant J of −0.56 cm−1. Frequency-dependent ac susceptibilities in the absence of dc field for 1 suggest slow relaxation of the magnetization with an energy barrier of 13.9 K, signifying that 1 features single-molecule magnet (SMM) behavior. This work presents a rational strategy to fine-tune the magnetic interactions and further magnetization dynamics of the Mn(III)-containing dinuclear units through small structural variations driven by the ingenious chemistry.
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21
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Pentacoordinate and Hexacoordinate Mn(III) Complexes of Tetradentate Schiff-Base Ligands Containing Tetracyanidoplatinate(II) Bridges and Revealing Uniaxial Magnetic Anisotropy. MOLECULES (BASEL, SWITZERLAND) 2016; 21:molecules21121681. [PMID: 27941609 PMCID: PMC6274172 DOI: 10.3390/molecules21121681] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/30/2016] [Accepted: 12/02/2016] [Indexed: 11/17/2022]
Abstract
Crystal structures and magnetic properties of polymeric and trinuclear heterobimetallic MnIII···PtII···MnIII coordination compounds, prepared from the Ba[Pt(CN)4] and [Mn(L4A/B)(Cl)] (1a/b) precursor complexes, are reported. The polymeric complex [{Mn(L4A)}2{μ4-Pt(CN)4}]n (2a), where H2L4A = N,N’-ethylene-bis(salicylideneiminate), comprises the {Mn(L4A)} moieties covalently connected through the [Pt(CN)4]2− bridges, thus forming a square-grid polymeric structure with the hexacoordinate MnIII atoms. The trinuclear complex [{Mn(L4B)}2{μ-Pt(CN)4}] (2b), where H2L4B = N,N’-benzene-bis(4-aminodiethylene-salicylideneiminate), consists of two [{Mn(L4B)} moieties, involving pentacoordinate MnIII atoms, bridged through the tetracyanidoplatinate (II) bridges to which they are coordinated in a trans fashion. Both complexes possess uniaxial type of magnetic anisotropy, with D (the axial parameter of zero-field splitting) = −3.7(1) in 2a and −2.2(1) cm−1 in 2b. Furthermore, the parameters of magnetic anisotropy 2a and 2b were also thoroughly studied by theoretical complete active space self-consistent field (CASSCF) methods, which revealed that the former is much more sensitive to the ligand field strength of the axial ligands.
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Antal P, Drahoš B, Herchel R, Trávníček Z. Late First-Row Transition-Metal Complexes Containing a 2-Pyridylmethyl Pendant-Armed 15-Membered Macrocyclic Ligand. Field-Induced Slow Magnetic Relaxation in a Seven-Coordinate Cobalt(II) Compound. Inorg Chem 2016; 55:5957-72. [DOI: 10.1021/acs.inorgchem.6b00415] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter Antal
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Bohuslav Drahoš
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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Tzani S, Lazarou KN, Stoumpos CC, Pissas M, Psycharis V, Sanakis Y, Raptopoulou CP. Iron(III) complexes with 2-pyridyl oxime ligands: Synthesis, structural and spectroscopic characterization, and magnetic studies. ChemistrySelect 2016. [DOI: 10.1002/slct.201600037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sofia Tzani
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Katerina N. Lazarou
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | | | - Michael Pissas
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Vassilis Psycharis
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Yiannis Sanakis
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Catherine P. Raptopoulou
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
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Drahoš B, Herchel R, Trávníček Z. Structural and magnetic properties of heptacoordinated MnII complexes containing a 15-membered pyridine-based macrocycle and halido/pseudohalido axial coligands. RSC Adv 2016. [DOI: 10.1039/c6ra03754b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Heptacoordinated MnII compounds with a pentadentate 15-membered pyridine-based macrocycle and two axially coordinated halido/pseudohalido coligands, having a monomeric or polymeric composition, were investigated.
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Affiliation(s)
- Bohuslav Drahoš
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
- Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
- Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
- Czech Republic
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Nemec I, Marx R, Herchel R, Neugebauer P, van Slageren J, Trávníček Z. Field-induced slow relaxation of magnetization in a pentacoordinate Co(II) compound [Co(phen)(DMSO)Cl2]. Dalton Trans 2015; 44:15014-21. [PMID: 26229042 DOI: 10.1039/c5dt02162f] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The static and dynamic magnetic properties of a pentacoordinate [Co(phen)(DMSO)Cl2] compound (phen = 1,10'-phenanthroline, DMSO = dimethyl sulfoxide) were thoroughly studied by experimental (SQUID magnetometry and HF-EPR spectroscopy) and theoretical methods (DFT and CASSCF calculations). It has been found from temperature/field-dependent magnetization measurements that the studied compound possesses a large and negative magnetic anisotropy (D = -17(1) cm(-1)) with large rhombicity (E/D = 0.24(5)), and these experimental results are in agreement with ab initio calculations (D = -17.7 cm(-1), E/D = 0.31). Interdoublet resonances were not observed in the HF-EPR measurements, but the large rhombicity was confirmed (DEPR = -17.7 cm(-1) (fixed from CASSCF calculations), E/DEPR = 0.33). A frequency dependent out-of-phase susceptibility signal was observed only in a non-zero static magnetic field (B = 0.1 T) and the following parameters of slow-relaxation of magnetisation were derived from the experimental data: either the energy of spin reversal barrier, Ueff = 10.4 K, and the relaxation time, τ0 = 5.69 × 10(-9) s using the Debye model, or Ueff = 21.4-40.3 K and τ0 = 0.248-58.3 × 10(-9) based on a simplified model.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic.
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Herchel R, Nemec I, Machata M, Trávníček Z. Experimental and Theoretical Investigations of Magnetic Exchange Pathways in Structurally Diverse Iron(III) Schiff-Base Complexes. Inorg Chem 2015; 54:8625-38. [DOI: 10.1021/acs.inorgchem.5b01271] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Radovan Herchel
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Ivan Nemec
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Marek Machata
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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Hao L, Lu Y, He Z, Lan Q, Wang E. Synthesis, structure, and characterization of two 1-D homometallic coordination polymers based on carboxylate-functionlized salen ligands. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1062093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Lina Hao
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Jilin, PR China
| | - Ying Lu
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Jilin, PR China
| | - Zhenzhen He
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Jilin, PR China
| | - Qing Lan
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Jilin, PR China
| | - Enbo Wang
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Jilin, PR China
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Nemec I, Herchel R, Svoboda I, Boča R, Trávníček Z. Large and negative magnetic anisotropy in pentacoordinate mononuclear Ni(ii) Schiff base complexes. Dalton Trans 2015; 44:9551-60. [DOI: 10.1039/c5dt00600g] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pentacoordinate Ni(ii) complexes with pentadentate Schiff base ligands possess large and negative values of axial magnetic anisotropy. The relationship between the shape of the coordination polyhedron and uniaxial anisotropy is outlined.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Ingrid Svoboda
- Materials Science
- Darmstadt University of Technology
- Darmstadt
- Germany
| | - Roman Boča
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 91701 Trnava
- Slovakia
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
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