1
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Finke S, Stammler A, Oldengott J, Walleck S, Glaser T. Direct and remote control of electronic structures and redox potentials in μ-oxo diferric complexes. Dalton Trans 2023; 52:17548-17561. [PMID: 37962521 DOI: 10.1039/d3dt02734a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Non-heme diiron enzymes activate O2 for the oxidation of substrates in the form of peroxo FeIII2 or high-valent FeIV2 intermediates. We have developed a dinucleating bis(tetradentate) ligand system that stabilizes peroxo and hydroperoxo FeIII2 complexes with terminal 6-methylpyridine donors, while the peroxo FeIII2 intermediate is reactive with terminal pyridine donors presumably via conversion to a fluent high-valent FeIV2 intermediate. We present here a derivative with electron-donating methoxy substituents at the pyridine donors and its diferric complexes with an {FeIIIX(μ-O)FeIIIX} (X- = Cl-, OAc-, and OH-) or an {FeIII(μ-O)(μ-OAc)FeIII} core. The complex-induced oxidation of EtOH with H2O2 provides μ-OAc-, and in acetone, the complex with mixed OH-/OAc- exogenous donors is obtained. Both reactivities indicate a reactive fluent peroxo FeIII2 intermediate. The coupling constant J and the LMCT transitions are insensitive to the nature of the directly bound ligands X- and reflect mainly the electronic structure of the central {FeIII(μ-O)FeIII} core, while Mössbauer spectroscopy and d-d transitions probe the local FeIII sites. The remote methoxy substituents decrease the potential for the oxidation to FeIV by ∼100 mV, while directly bound OH- in {FeIII(OH)(μ-O)FeIII(OH)} with a short 1.91 Å FeIII-OOH bond decreases the potential by 590 mV compared to {FeIII(OAc)(μ-O)FeIII(OAc)} with a 2.01 Å FeIII-OOAc bond. Interestingly, this FeIII-OH bond is even shorter (1.87 Å) in the mixed OH-/OAc- complex but the potential is the mean value of the potentials of the OH-/OH- and OAc-/OAc- complexes, thus reflecting the electron density of the central {FeIII(μ-O)FeIII} core and not of the local FeIII-OH unit.
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Affiliation(s)
- Sebastian Finke
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Jan Oldengott
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Stephan Walleck
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany.
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2
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Lee KHK, Christou G. Semiempirical Magnetostructural Correlation for High-Nuclearity Mn III-Oxo Complexes: Accommodation of Different Relative Jahn-Teller Axis Orientations. Inorg Chem 2023. [PMID: 37922406 DOI: 10.1021/acs.inorgchem.3c02739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
The previous development of a magnetostructural correlation (MSC) for polynuclear FeIII/oxo clusters has now been extended to one for polynuclear MnIII/oxo clusters. A semiempirical model estimating each pairwise Mn2 exchange constant (Jij) from the Mn-O bond lengths and Mn-O-Mn angles has been formulated based on the angular overlap model. The extra complication, compared with the FeIII/oxo MSC, of different relative orientations of the Jahn-Teller distortion axes typical of high-spin MnIII in near-octahedral geometry was accommodated by developing a separate MSC variant for each possible situation. The final coefficients of the three MSC variants were determined by using reliable crystal structure data and experimentally determined Jij values from the literature. The estimated JMSC values from the new MnIII/oxo MSC have been employed to successfully rationalize the magnetic properties of a number of MnIII clusters in the nuclearity range Mn3-Mn10. These properties include relative spin vector alignments in the ground state, the presence of spin frustration effects, and the resulting overall ground state spin. In addition, the JMSC values can be used to simulate the direct-current magnetic susceptibility versus temperature data and provide realistic input values for fits of these data to minimize false-fit problems. A protocol for the use of the new MSC is also reported.
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Affiliation(s)
- Kenneth Hong Kit Lee
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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3
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Cutler DJ, Canaj AB, Singh MK, Nichol GS, Gracia D, Nojiri H, Evangelisti M, Schnack J, Brechin EK. Odd and Even Numbered Ferric Wheels. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304553. [PMID: 37635185 PMCID: PMC10625049 DOI: 10.1002/advs.202304553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/04/2023] [Indexed: 08/29/2023]
Abstract
The structurally related odd and even numbered wheels [FeIII 11 ZnII 4 (tea)10 (teaH)1 (OMe)Cl8 ] (1) and [FeIII 12 ZnII 4 (tea)12 Cl8 ] (2) can be synthesized under ambient conditions by reacting FeIII and ZnII salts with triethanolamine (teaH3 ), the change in nuclearity being dictated by the solvents employed. An antiferromagnetic exchange between nearest neighbors, J = -10.0 cm-1 for 1 and J = -12.0 cm-1 for 2, leads to a frustrated S = 1/2 ground state in the former and an S = 0 ground state in the latter.
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Affiliation(s)
- Daniel J. Cutler
- EaStCHEM School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - Angelos B. Canaj
- EaStCHEM School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - Mukesh K. Singh
- EaStCHEM School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - Gary S. Nichol
- EaStCHEM School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - David Gracia
- Instituto de Nanociencia y Materiales de Aragón (INMA)CSIC & Universidad de ZaragozaZaragoza50009Spain
| | - Hiroyuki Nojiri
- Institute for Materials ResearchTohoku UniversityKatahira 2‐1‐1Sendai980–8577Japan
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón (INMA)CSIC & Universidad de ZaragozaZaragoza50009Spain
| | - Jürgen Schnack
- Universität Bielefeld | Fakultät für PhysikPostfach 100131D‐33501BielefeldGermany
| | - Euan K. Brechin
- EaStCHEM School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
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4
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Syntheses, X-ray structure and biological studies of binuclear µ-oxo diiron complexes with s-triazine pincer ligand. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Lee KHK, Aebersold L, Peralta JE, Abboud KA, Christou G. Synthesis, Structure, and Magnetic Properties of an Fe 36 Dimethylarsinate Cluster: The Largest "Ferric Wheel". Inorg Chem 2022; 61:17256-17267. [PMID: 36251497 DOI: 10.1021/acs.inorgchem.2c02841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and characterization of a high-nuclearity FeIII/O/arsinate cluster is reported within the salt [Fe36O12(OH)6(O2AsMe2)63(O2CH)3(H2O)6](NO3)12 (1). The compound was prepared from the reaction of Fe(NO3)3·9H2O, dimethylarsinic acid (Me2AsO2H), and triethylamine in a 1:2:4 molar ratio in acetonitrile. The Fe36 cation of 1 is an unprecedented structural type consisting of nine Fe4 butterfly units of two types, three {FeIII4(μ3-O)2} units A, and six {FeIII4(μ3-O)(μ3-OH)} units B, linked by multiple bridging Me2AsO2- groups into an Fe36 triangular wheel/loop with C3 crystallographic and D3 virtual symmetry that looks like a guitar plectrum. The unusual structure has been rationalized on the basis of the different curvatures of units A and B, the presence of intra-Fe36 hydrogen bonding, and the tendency of Me2AsO2- groups to favor μ3-bridging modes. The cations stack into supramolecular nanotubes parallel to the crystallographic c axis and contain badly disordered solvent and NO3- anions. The cation of 1 is the highest-nuclearity "ferric wheel" to date and also the highest-nuclearity Fe/O cluster of any structural type with a single contiguous Fe/O core. Variable-temperature direct-current magnetic susceptibility data and alternating-current in-phase magnetic susceptibility data indicate that the cation of 1 possesses an S = 0 ground state and dominant antiferromagnetic interactions. The Fe2 pairwise Ji,j couplings were estimated by the combined use of a magnetostructural correlation for high-nuclearity FeIII/oxo clusters and density functional theory calculations using broken-symmetry methods and the Green's function approach. The three methods gave satisfyingly similar Ji,j values and allowed the identification of spin-frustration effects and the resulting relative spin-vector alignments and thus rationalization of the S = 0 ground state of the cation.
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Affiliation(s)
- Kenneth Hong Kit Lee
- Department of Chemistry, University of Florida, Gainesville, Florida32611-7200, United States
| | - Lucas Aebersold
- Department of Physics and Science of Advanced Materials, Central Michigan University, Mount Pleasant, Michigan48859, United States
| | - Juan E Peralta
- Department of Physics and Science of Advanced Materials, Central Michigan University, Mount Pleasant, Michigan48859, United States
| | - Khalil A Abboud
- Department of Chemistry, University of Florida, Gainesville, Florida32611-7200, United States
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida32611-7200, United States
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6
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Hale AR, Lott ME, Peralta JE, Foguet-Albiol D, Abboud KA, Christou G. Magnetic Properties of High-Nuclearity Fe x-oxo ( x = 7, 22, 24) Clusters Analyzed by a Multipronged Experimental, Computational, and Magnetostructural Correlation Approach. Inorg Chem 2022; 61:11261-11276. [PMID: 35816698 DOI: 10.1021/acs.inorgchem.2c01371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis, structure, and magnetic properties of three related iron(III)-oxo clusters are reported, [Fe7O3(O2CPh)9(mda)3(H2O)] (1), [Fe22O14(OH)3(O2CMe)21(mda)6](ClO4)2 (2), and [Fe24O15(OH)4(OEt)(O2CMe)21(mda)7](ClO4)2 (3), where mdaH2 is N-methyldiethanolamine. 1 was prepared from the reaction of [Fe3O(O2CPh)6(H2O)3](NO3) with mdaH2 in a 1:2 ratio in MeCN, whereas 2 and 3 were prepared from the reaction of FeCl3/NaO2CMe/mdaH2 in a 2:∼13:2 ratio and FeCl3/NaO2CMe/mdaH2/pyridine in a 2:∼13:2:25 ratio, respectively, both in EtOH. The core of 1 consists of a central octahedral FeIII ion held within a nonplanar Fe6 loop by three μ3-O2- and three μ2-RO- arms from the three mda2- chelates. The cores of the cations of 2 and 3 consist of an A:B:A three-layer topology, in which a central Fe6 (2) or Fe8 (3) layer B is sandwiched between two Fe8 layers A. The A layers structurally resemble 1 with the additional Fe added at the center to retain virtual C3 symmetry. The central Fe6 layer B of 2 consists of a {Fe4(μ4-O)2(μ3-OH)2}6+ cubane with an Fe on either side attached to cubane O2- ions, whereas that of 3 has the same cubane but with an {Fe3(μ3-O)(μ-OH)} unit attached on one side and a single Fe on the other. Variable-temperature dc and ac magnetic susceptibility studies revealed dominant antiferromagnetic coupling in all complexes leading to ground-state spins of S = 5/2 for 1 and S = 0 for 2 and 3. All Fe2 pairwise exchange parameters (Jij) for 1-3 were estimated by two independent methods: density functional theory (DFT) calculations using broken symmetry methods and a magnetostructural correlation previously developed for high-nuclearity FeIII/O complexes. The two approaches gave satisfyingly similar Jij values, and the latter allowed rationalization of the experimental ground states by identification of the spin frustration effects operative and the resultant relative spin vector alignments at each FeIII ion.
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Affiliation(s)
- Ashlyn R Hale
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, Unites States
| | - Megan E Lott
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, Unites States
| | - Juan E Peralta
- Department of Physics and Science of Advanced Materials, Central Michigan University, Mount Pleasant, Michigan 48859, United States
| | - Dolos Foguet-Albiol
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, Unites States
| | - Khalil A Abboud
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, Unites States
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, Unites States
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7
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Hale AR, Aebersold LE, Peralta JE, Foguet-Albiol D, Abboud KA, Christou G. Analysis of spin frustration in an FeIII7 cluster using a combination of computational, experimental, and magnetostructural correlation methods. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Cutler DJ, Coletta M, Singh MK, Canaj AB, McCormick LJ, Coles SJ, Schnack J, Brechin EK. An [Fe III8] molecular oxyhydroxide. Dalton Trans 2022; 51:8945-8948. [PMID: 35611692 DOI: 10.1039/d2dt01477g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An [FeIII8] hexagonal bipyramid displays antiferromagnetic exchange between the two capping tetrahedral ions and the six ring octahedral ions resulting in a spin ground state of S = 10.
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Affiliation(s)
- Daniel J Cutler
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Marco Coletta
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Mukesh K Singh
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Angelos B Canaj
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Laura J McCormick
- EPSRC National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Simon J Coles
- EPSRC National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Jürgen Schnack
- Universitat Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
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9
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Dearle AE, Cutler DJ, Coletta M, Lee E, Dey S, Sanz S, Fraser HWL, Nichol GS, Rajaraman G, Schnack J, Cronin L, Brechin EK. An [FeIII30] molecular metal oxide. Chem Commun (Camb) 2021; 58:52-55. [PMID: 34807967 DOI: 10.1039/d1cc06224g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissolution of FeBr3 in a mixture of acetonitrile and 3,4-lutidine in the presence of an amine results in the formation of an [Fe30] molecular metal oxide containing alternating layers of tetrahedral and octahedral FeIII ions. Mass spectrometry suggests the cluster is formed quickly and remains stable in solution, while magnetic measurements and DFT calculations reveal competing antiferromagnetic exchange interactions.
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Affiliation(s)
- Alice E Dearle
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Daniel J Cutler
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Marco Coletta
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Edward Lee
- WestCHEM School of Chemistry, The University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | - Sergio Sanz
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Hector W L Fraser
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Gary S Nichol
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | - Jürgen Schnack
- Fakultät für Physik, Universitat Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
| | - Leroy Cronin
- WestCHEM School of Chemistry, The University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
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10
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Cutler DJ, Singh MK, Nichol GS, Evangelisti M, Schnack J, Cronin L, Brechin EK. [Fe 15]: a frustrated, centred tetrakis hexahedron. Chem Commun (Camb) 2021; 57:8925-8928. [PMID: 34396373 DOI: 10.1039/d1cc03919a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of two different FeIII salts in a solvothermal reaction with triethanolamine results in the formation of a high symmetry [FeIII15] cluster whose structure conforms to a centred, tetrakis hexahedron.
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Affiliation(s)
- Daniel J Cutler
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Mukesh K Singh
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Gary S Nichol
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jürgen Schnack
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
| | - Leroy Cronin
- School of Chemistry, The University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, Scotland, UK.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
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11
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De Silva DN, Dais TN, Jameson GB, Cutler DJ, Brechin EK, Davies CG, Jameson GNL, Plieger PG. Synthesis and Characterization of Symmetrically versus Unsymmetrically Proton-Bridged Hexa-Iron Clusters. ACS OMEGA 2021; 6:16661-16669. [PMID: 34235338 PMCID: PMC8246689 DOI: 10.1021/acsomega.1c02255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
Syntheses and magnetic and structural characterization of hexa-iron complexes of derivatized salicylaldoximes are discussed. Complexation of Fe(BF4)2·6H2O with each ligand (H2 L1 and H4 L2) in a methanolic-pyridine solution resulted in hexa-iron compounds (C1 and C2, respectively), which each contain two near-parallel metal triangles of [Fe3-μ3-O], linked by six fluoride bridges and stabilized by a hydrogen-bonded proton between the μ3-O groups. Within each metal triangle of C2, Fe(III) ions are connected via the amine "straps" of (H4 L2-2H). Variable-temperature magnetic susceptibility and Mössbauer data of C1 and C2 indicate the presence of dominant antiferromagnetic interactions between the high-spin (S = 5/2) Fe(III) centers. For C1, two quadrupole doublets are observed at room temperature and 5 K, consistent with structural data from which discrete but disordered [Fe3-μ3-O] and [Fe3-μ3-OH] species were inferred. For C2, a single sharp quadrupole doublet with splitting intermediate between those determined for C1 was observed, consistent with the symmetric [Fe3-μ3-O···H···μ3-O-Fe3] species inferred crystallographically from the very short μ3-O···μ3-O separation. The differences in the physical properties of the complexes, as seen in the Mössbauer, X-ray, and magnetic data, are attributed to the conformational flexibility imparted by the nature of the linkages between the closely related ligands.
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Affiliation(s)
| | - Tyson N. Dais
- School
of Fundamental Sciences, Massey University, Palmerston North 4410, New Zealand
| | - Geoffrey B. Jameson
- School
of Fundamental Sciences, Massey University, Palmerston North 4410, New Zealand
| | - Daniel J. Cutler
- EaStCHEM
School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K.
| | - Euan K. Brechin
- EaStCHEM
School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K.
| | - Casey G. Davies
- Department
of Chemistry & MacDiarmid Institute for Advanced Materials &
Nanotechnology, University of Otago, Dunedin 9016, New Zealand
| | - Guy N. L. Jameson
- School
of Chemistry and Bio21 Molecular Science and Biotechnology Institute,
The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Paul G. Plieger
- School
of Fundamental Sciences, Massey University, Palmerston North 4410, New Zealand
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12
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Ning J, Truhlar DG. Spin-Orbit Coupling Changes the Identity of the Hyper-Open-Shell Ground State of Ce +, and the Bond Dissociation Energy of CeH + Proves to Be Challenging for Theory. J Chem Theory Comput 2021; 17:1421-1434. [PMID: 33576629 DOI: 10.1021/acs.jctc.0c01124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cerium (Ce) plays important roles in catalysis. Its position in the sixth period of the periodic table leads to spin-orbit coupling (SOC) and other open-shell effects that make the quantum mechanical calculation of cerium compounds challenging. In this work, we investigated the low-lying spin states of Ce+ and the bond energy of CeH+, both by multiconfigurational methods, in particular, SA-CASSCF, MC-PDFT, CASPT2, XMS-PDFT, and XMS-CASPT2, and by single-configurational methods, namely, Hartree-Fock theory and unrestricted Kohn-Sham density functional theory with 34 choices of the exchange-correlation functional. We found that only CASPT2, XMS-CASPT2, and SA-CASSCF (among the five multiconfigurational methods) and GAM, HCTH, SOGGA11, and OreLYP (among the 35 single-configuration methods) successfully predict that the SOC-free ground spin state of Ce+ is a doublet state, and CASPT2 and GAM give the most accurate multireference and single-reference calculations, respectively, of the excitation energy of the first SOC-free excited state for Ce+. We calculated that the ground doublet state of Ce+ is an intra-atomic hyper-open-shell state. We calculated the spin-orbit energy (ESO) of Ce+ by the five multiconfigurational methods and found that ESO calculated by CASPT2 is the closest to the experimental value. Taking advantage of the availability of an experimental D0 for CeH+ as a way to provide a unique test of theory, we showed that all the multiconfigurational methods overestimate D0 by at least 246 meV (5.7 kcal/mol), and only three functionals, namely, SOGGA, MN15, and GAM, have an error of D0 that is less than 200 meV (5 kcal/mol).
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Affiliation(s)
- Jiaxin Ning
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
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13
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Lee KHK, Peralta JE, Abboud KA, Christou G. Iron(III)-Oxo Cluster Chemistry with Dimethylarsinate Ligands: Structures, Magnetic Properties, and Computational Studies. Inorg Chem 2020; 59:18090-18101. [PMID: 33291879 DOI: 10.1021/acs.inorgchem.0c02554] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A program has been initiated to develop FeIII/oxo cluster chemistry with the "pseudocarboxylate" ligand dimethylarsinate (Me2AsO2-) for comparison with the well investigated FeIII/oxo/carboxylate cluster area. The synthesis and characterization of three polynuclear FeIII complexes are reported, [Fe12O4(O2CtBu)8(O2AsMe2)17(H2O)3]Cl3 (1), Na2[Fe12Na2O4(O2AsMe2)20(NO3)6(Me2AsO2H)2(H2O)4](NO3)6 (2), and [Fe3(O2AsMe2)6(Me2AsO2H)2(hqn)2](NO3) (3), where hqnH is 8-hydroxyquinoline. The Fe12 core of 1 is a type never previously encountered in FeIII carboxylate chemistry, consisting of two Fe6 units each of which comprises two {Fe3(μ3-O2-)} units bridged by three Me2AsO2- groups and linked into an Fe12 loop structure by two anti-anti η1:η1:μ Me2AsO2- groups, a bridging mode extremely rare with carboxylates. 2 also consists of two Fe6 units, differing in their ligation from those in 1, and this time linked together into a linear structure by a central {Na2(NO3)2} bridging unit. 3 is a linear Fe3 complex with no monatomic bridges between FeIII ions, a very rare situation in FeIII chemistry with any ligands and unprecedented in Fe carboxylate chemistry. The distinct differences observed in arsinate vs carboxylate ligation modes are rationalized largely based on the greater basicity of the former vs the latter. Variable-temperature dc and ac magnetic susceptibility data reveal all Fe2 pairwise interactions to be antiferromagnetic. For 1 and 2, the different Jij couplings were estimated by use of a magnetostructural correlation for high nuclearity FeIII-oxo clusters and by density functional theory calculations using broken symmetry methods, allowing identification of their relative spin vector alignments and thus rationalization of their S = 0 ground states. The Jij values were then used as input values to give excellent fits of the experimental χMT vs T data. For 3, the fits of the experimental χMT vs T data to the Van Vleck equation or with PHI gave a very weak J12 = -0.8(1) cm-1 (H = -2JŜi·Ŝj convention) between adjacent FeIII ions and an S = 5/2 ground state. These initial FeIII arsinate complexes also provide structural parameters that help validate literature assignments of arsinate binding modes to iron oxide/hydroxide minerals as part of environmental concerns of using arsenic-containing herbicides in agriculture.
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Affiliation(s)
- Kenneth Hong Kit Lee
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Juan E Peralta
- Department of Physics and Science of Advanced Materials, Central Michigan University, Mount Pleasant, Michigan 48859, United States
| | - Khalil A Abboud
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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14
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A New FeIII Substituted Arsenotungstate [FeIII2(AsIIIW6O23)2(AsIIIO3H)2]12−: Synthesis, Structure, Characterization and Magnetic Properties. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6040054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The iron(III)-containing arsenotungstate [FeIII2(AsIIIW6O23)2(AsIIIO3H)2]12− (1) was prepared via a simple, one-pot reaction in aqueous basic medium. The compound was isolated as its sodium salt, and structurally-characterized by Single Crystal X-ray Diffraction (SCXRD), Powder X-ray Diffraction (PXRD), Fourier-Transform Infrared (FT-IR) spectroscopy, Thermogravimetric Analysis (TGA) and elemental analysis. Its magnetic properties are reported; the antiferromagnetic coupling between the two FeIII centers is unusually weak as a result of the bridging geometry imposed by the rigid arsenotungstate metalloligands.
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15
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Kaemmerer H, Baniodeh A, Peng Y, Moreno-Pineda E, Schulze M, Anson CE, Wernsdorfer W, Schnack J, Powell AK. Inorganic Approach to Stabilizing Nanoscale Toroidicity in a Tetraicosanuclear Fe 18Dy 6 Single Molecule Magnet. J Am Chem Soc 2020; 142:14838-14842. [PMID: 32786752 DOI: 10.1021/jacs.0c07168] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cyclic coordination clusters (CCCs) are proving to provide an extra dimension in terms of exotic magnetic behavior as a result of their finite but cyclized chain structures. The Fe18Dy6 CCC is a Single Molecule Magnet with the highest nuclearity among Ln containing clusters. The three isostructural compounds [Fe18Ln6(μ-OH)6(ampd)12(Hampd)12(PhCO2)24](NO3)6·38MeCN for Ln = DyIII (1), LuIII (2), or YIII (3), where H2ampd = 2-amino-2-methyl-1,3-propanediol, are reported. These can be described in terms of the cyclization of six {Fe3Ln(μOH)(ampd)2(Hampd)2(PhCO2)4}+ units with six nitrate counterions to give the neutral cluster. The overall structure consists of two giant Dy3 triangles sandwiching a strongly antiferromagnetically coupled Fe18 ring, leading to a toroidal arrangement of the anisotropy axis of the Dy ions, making this the biggest toroidal arrangement on a molecular level known so far.
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Affiliation(s)
- Hagen Kaemmerer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Amer Baniodeh
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Eufemio Moreno-Pineda
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá, Panamá
| | - Michael Schulze
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Wolfgang Wernsdorfer
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jürgen Schnack
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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16
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Singh AP, Joshi RP, Abboud KA, Peralta JE, Christou G. Molecular spin frustration in mixed-chelate Fe5 and Fe6 oxo clusters with high ground state spin values. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Arizaga L, Cañon-Mancisidor W, Gancheff JS, Burrow RA, Armentano D, Lloret F, González R, Kremer C, Chiozzone R. New hexanuclear FeIII clusters with the gem-diol hydrated form of di(2-pyridyl)ketone and carboxylato ligands: Crystal structures and magnetic properties. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Zhao X, Wang Y, Bao D, Zhang F, Wu W, Xu F, Zhang Q, Li Y. A Series of High‐nuclear 3
d
‐4
f
(Fe
III
8
Ln
III
2
) Complexes: Syntheses, Structures, and Magnetic Properties. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5222] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao‐Qing Zhao
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)Nankai University Tianjin 300071 P. R. China
| | - Yi‐Yan Wang
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Dong‐Xu Bao
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Fen‐Hang Zhang
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Wei Wu
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Fu‐Sen Xu
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Qiu‐Hong Zhang
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
| | - Yun‐Chun Li
- College of ScienceSichuan Agricultural University Ya'an 625014 P. R. China
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19
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Barman SK, Cano J, Lloret F, Mukherjee R. Single-Molecule-Magnet FeII4FeIII2 and Antiferromagnetic FeIII4 Coordination Clusters. Inorg Chem 2019; 58:8086-8099. [DOI: 10.1021/acs.inorgchem.9b00828] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suman K. Barman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Joan Cano
- Departament de Química, Inorgànica/Instituto de Ciencia Molecular (ICMOL), Universitat de València, Polígono de
la Coma, s/n, 46980 Paterna (València), Spain
| | - Francesc Lloret
- Departament de Química, Inorgànica/Instituto de Ciencia Molecular (ICMOL), Universitat de València, Polígono de
la Coma, s/n, 46980 Paterna (València), Spain
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20
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Fe6 clusters of tripodal alcohol ligands: Synthesis, structures and magnetostructural properties. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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21
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Singh MK, Rajaraman G. Theoretical Studies on Hexanuclear [M 3(μ 3-O/OH)] 2 (M = Fe(III), Mn(III), and Ni(II)) Clusters: Magnetic Exchange, Magnetic Anisotropy, and Magneto-Structural Correlations. Inorg Chem 2019; 58:3175-3188. [PMID: 30741554 DOI: 10.1021/acs.inorgchem.8b03257] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Controlling spin Hamiltonian parameters such as magnetic exchange and magnetic anisotropy of polynuclear clusters is of great interest in the area of single molecule magnets (SMMs). Among large polynuclear clusters, hexanuclear clusters offer the best compromise in terms of size as they are often rigid, solution stable, and chemically amenable. The {M6O2} core is one of the common architectures known for many hexanuclear clusters and generally reported to possess a diamagnetic ST = 0 spin ground state, barring a few exceptions. In these clusters, there are several open questions that are poorly understood: (a) What controls the nature of magnetic exchange, which in turn dictates the ground state spin values? (b) For clusters possessing a nonzero spin ground state, what dictates the magnetic anisotropy? Here, using density functional methods, we have attempted to shed light on these two question by evaluating the exchange coupling constants in [Fe6IIIO2(OH)2{(C4N2H2SMe)2C(OH)O}2( tBuCO2)10] (1), [Fe6III(O)2(O2CH2)(O2CCH2 tBu)12(py)2] (2), [Fe6III(O2)(O)2(O2CCMe3)12(py)2] (3), [FeIII6O3(O2CMe)9(OEt)2(bpy)2]ClO4 (4), [MnIII6O2(O2CH2)(O2CPe t)11(HO2CPe t)2(O2CMe)] (5), and [NiII6(OH)4(O2C tBu)8( tBuCO2H)4] (6) complexes. We have estimated all the eight near-neighbor exchange coupling constants in these clusters. Our calculations not only agree with the experimental results but also offer insight on the origin of the spin ground state. Extensive magneto-structural correlations developed by varying M-O-M angles and M-O distances reveal that J values are extremely sensitive to small structural distortions. Correlations developed indicate that both the parameters are important for Fe(III), but for Mn(III) and Ni(II), the angles were found to play a dominant role. Quite interestingly, the computed zero-field splitting parameter D S=5 of complex 1 reveals that the exchange contribution to the anisotropy controls the sign of the ground state D value-an observation which differs from the general perception that the ground state D is controlled by the single-ion zero-field splitting parameter.
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Affiliation(s)
- Mukesh Kumar Singh
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai , Maharashtra , India - 400076
| | - Gopalan Rajaraman
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai , Maharashtra , India - 400076
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22
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Glaser T. A dinucleating ligand system with varying terminal donor functions but without bridging donor functions: Design, synthesis, and applications for diiron complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Vieru V, Ungur L, Cemortan V, Sukhanov A, Baniodeh A, Anson CE, Powell AK, Voronkova V, Chibotaru LF. Magnetization Blocking in Fe2
III
Dy2
III
Molecular Magnets: Ab Initio Calculations and EPR Spectroscopy. Chemistry 2018; 24:16652-16661. [DOI: 10.1002/chem.201803821] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Veacheslav Vieru
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
| | - Liviu Ungur
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
- Department of Chemistry; National University of Singapore; Block S8 Level 3, 3 Science Drive 3 Singapore 117543 Singapore
| | - Valeriu Cemortan
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
| | - Andrey Sukhanov
- Zavoisky Physical-Technical Institute; FRC Kazan Scientific Center of RAS; Kazan Russian Federation
| | - Amer Baniodeh
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstrasse 15 76131 Karlsruhe Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstrasse 15 76131 Karlsruhe Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstrasse 15 76131 Karlsruhe Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; Postfach 3640 76021 Karlsruhe Germany
| | - Violeta Voronkova
- Zavoisky Physical-Technical Institute; FRC Kazan Scientific Center of RAS; Kazan Russian Federation
| | - Liviu F. Chibotaru
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
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24
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25
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Zimmermann TP, Limpke T, Stammler A, Bögge H, Walleck S, Glaser T. Variation of the Molecular and Electronic Structures of μ
-Oxo Diferric Complexes with the Bridging Motive. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800093] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Thomas Philipp Zimmermann
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
| | - Thomas Limpke
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
| | - Hartmut Bögge
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
| | - Stephan Walleck
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I; Fakultät für Chemie; Universität Bielefeld; Universitätsstrasse 25 33615 Bielefeld Germany
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26
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Meng T, Wang JS, Zou HH, Liang FH, Liang FP. Synthesis, crystal structure, and properties of a tetrairon cluster based on 2-methyl-8-hydroxyquinoline. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1433296] [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)
- Ting Meng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Jia-Shun Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Hua-Hong Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Feng-Hua Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Fu-Pei Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, P. R. China
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27
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Doroshenko I, Babiak M, Buchholz A, Tucek J, Plass W, Pinkas J. Hexanuclear iron(iii) α-aminophosphonate: synthesis, structure, and magnetic properties of a molecular wheel. NEW J CHEM 2018. [DOI: 10.1039/c7nj03606j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A new hexanuclear molecular iron phosphonate complex, [Fe6(HAIPA)12(OH)6]·nH2O (1·nH2O) (H2AIPA = NH2(CH3)2CP(O)(OH)2, (2-aminopropan-2-yl)phosphonic acid), was synthesized from Fe2+ and Fe3+ salts in water by interaction with the ligand sodium salt.
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Affiliation(s)
- Iaroslav Doroshenko
- Department of Chemistry
- Masaryk University
- Kotlarska 2
- CZ-61137 Brno
- Czech Republic
| | - Michal Babiak
- Department of Chemistry
- Masaryk University
- Kotlarska 2
- CZ-61137 Brno
- Czech Republic
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- Humboldtstraße 8
- 07743 Jena
- Germany
| | - Jiri Tucek
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacky University
- Slechtitelu 27
- CZ-78371 Olomouc
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- Humboldtstraße 8
- 07743 Jena
- Germany
| | - Jiri Pinkas
- Department of Chemistry
- Masaryk University
- Kotlarska 2
- CZ-61137 Brno
- Czech Republic
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28
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Hari N, Mandal S, Jana A, Sparkes HA, Mohanta S. Syntheses, crystal structures, magnetic properties and ESI-MS studies of a series of trinuclear CuIIMIICuII compounds (M = Cu, Ni, Co, Fe, Mn, Zn). RSC Adv 2018; 8:7315-7329. [PMID: 35539115 PMCID: PMC9078389 DOI: 10.1039/c7ra13763j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 02/05/2018] [Indexed: 11/21/2022] Open
Abstract
Six homo/heterotrinuclear CuIIMIICuII (M = Mn–Zn) compounds derived from salicylaldehyde-trans-1,2-diaminocyclohexane, which is a rarely utilized ligand, are reported.
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Affiliation(s)
- Nairita Hari
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | - Shuvankar Mandal
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | - Arpita Jana
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
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29
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Yang W, Yang H, Zeng SY, Li DC, Dou JM. Unprecedented family of heterometallic Ln III[18-metallacrown-6] complexes: syntheses, structures, and magnetic properties. Dalton Trans 2017; 46:13027-13034. [PMID: 28937171 DOI: 10.1039/c7dt02735d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a new family of LnIII[18-metallacrown-6] compounds with the formula [Fe6O2Ln(tBu-sao)6(OH)(MeO)4(MeOH)(H2O)]·6MeOH [Ln = DyIII (1), TbIII (2), GdIII (3), and YIII (4), tBu-saoH2 = 3,5-di-tert-butylsalicylaldoxime] was synthesized through one-pot reactions using tBu-saoH2, Fe(ClO4)3·6H2O, and Ln(NO3)3·6H2O. The four compounds are isostructural, and the encapsulation of a Ln ion in the ring cavity of 18-metallacrown-6 (18-MC-6) was exhibited for the first time. The structural analysis shows a ship-like 18-MC-6 core with a beset lanthanide ion connecting six ring oxygen atoms (OMC). Magnetic measurements reveal domain antiferromagnetic coupling interactions between metal ions and field-dependent slow magnetic relaxation in 1-3.
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Affiliation(s)
- Wei Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemical and Chemical Engineering, Liaocheng University, 252059 Liaocheng, P.R. China.
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30
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Varga Z, Verma P, Truhlar DG. Hyper Open-Shell States: The Lowest Excited Spin States of O Atom, Fe2+ Ion, and FeF2. J Am Chem Soc 2017; 139:12569-12578. [DOI: 10.1021/jacs.7b06107] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zoltan Varga
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, 207 Pleasant
Street SE, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Pragya Verma
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, 207 Pleasant
Street SE, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous
Materials Genome Center, 207 Pleasant Street SE, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Donald G. Truhlar
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, 207 Pleasant
Street SE, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous
Materials Genome Center, 207 Pleasant Street SE, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
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31
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Kitos AA, Papatriantafyllopoulou C, Tasiopoulos AJ, Perlepes SP, Escuer A, Nastopoulos V. Binding of ligands containing carbonyl and phenol groups to iron(iii): new Fe 6, Fe 10 and Fe 12 coordination clusters. Dalton Trans 2017; 46:3240-3251. [PMID: 28224156 DOI: 10.1039/c6dt04830g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The initial use of ligands 2'-hydroxyacetophenone (HL1), 2-hydroxybenzophenone (HL2) and 2,2'-dihydroxybenzophenone (H2L3) in iron(iii) chemistry is described. The syntheses and crystal structures are reported for five iron(iii) clusters: [Fe10O4(OMe)14(L1)6(MeOH)2](NO3)2·3MeOH (1·3MeOH), [Fe12O4(OH)(OMe)17(L1)8](ClO4)2·2H2O (2·2H2O), [Fe10O4(OMe)14Cl4(L2)4(MeOH)2] (3), [Fe10O4(OMe)14(L2)6(py)2](ClO4)2·MeOH (4·MeOH), where py = pyridine, and [Fe6O2(OEt)6(O2CMe)2(L3)2(HL3)2] (5). The molecular structures of the decanuclear clusters 1, 3 and 4 are organized around a {Fe10(μ4-O)4(μ3-OMe)2(μ-OMe)12}8+ core consisting of ten {Fe3O4} face-sharing defective cubane units. The core of 2 consists of a {Fe12(μ4-O)4(μ3-OMe)4(μ-OH)(μ-OMe)13}10+ unit composed of twelve {Fe3O4} face-sharing defective cubanes. The ligands (L1)- and (L2)- in 1-4 adopt the O,O'-bidentate chelating coordination mode and their roles are to terminate the further aggregation of the FeIII/O2-/RO- cores. Complex 5 contains the {Fe6(μ4-O)2(μ-OEt)6(μ-Ocarbonyl)2}4+ core, where the μ-Ocarbonyl atoms are the bridging carbonyl oxygens of the two η1:η2:η1:μ (L3)2- ligands; the (HL3)- groups behave as Ophenolate, Ocarbonyl-bidentate chelating ligands with the neutral hydroxyl group being unbound to the FeIII atoms. The core is composed of four {Fe3O4} face-sharing defective cubanes. The FeIII atoms in 1-5 are all six-coordinate with distorted octahedral geometries. The IR spectra of the complexes are discussed in terms of the known coordination modes of the ligands and the ionic character of nitrates and perchlorates. Variable-temperature magnetic susceptibility and variable-field magnetization measurements establish that 2, 3 and 5 have S = 3, 0 and 5 ground states, respectively. The susceptibility data for 5 were fitted using a 3-J model indicating the simultaneous presence of both antiferromagnetic and ferromagnetic FeIIIFeIII exchange interactions. Known magnetostructural correlations in oxido-bridged iron(iii) systems have been applied to rationalise the magnetic behaviour of the three clusters. The results of the present study demonstrate the utility of HL1, HL2 and H2L3 in the stabilisation of robust iron(iii)/oxido/alkoxido clusters.
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Affiliation(s)
| | - Constantina Papatriantafyllopoulou
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus and School of Chemistry, National University of Ireland Galway, Galway, Ireland
| | | | - Spyros P Perlepes
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Albert Escuer
- Departament de Quimica Inorgànica i Orgànica, Seccio Inorgànica and Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
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32
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Mitchell KJ, Abboud KA, Christou G. Magnetostructural Correlation for High-Nuclearity Iron(III)/Oxo Complexes and Application to Fe5, Fe6, and Fe8 Clusters. Inorg Chem 2016; 55:6597-608. [DOI: 10.1021/acs.inorgchem.6b00769] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kylie J. Mitchell
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Khalil A. Abboud
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - George Christou
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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33
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Kühne IA, Mereacre V, Anson CE, Powell AK. Nine members of a family of nine-membered cyclic coordination clusters; Fe6Ln3 wheels (Ln = Gd to Lu and Y). Chem Commun (Camb) 2016; 52:1021-4. [DOI: 10.1039/c5cc08887a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a family of isostructural nonanuclear FeIII–LnIII cyclic coordination clusters, [FeIII6LnIII3(μ-OMe)9(vanox)6 (benzoate)6], with a planar core structure built up from three [Fe2Ln] units to give a giant Ln3 triangle embedded into an Fe6 ring.
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Affiliation(s)
- Irina A. Kühne
- Institut für Anorganische Chemie
- KIT (Karlsruhe Institute of Technology)
- 76131 Karlsruhe
- Germany
| | - Valeriu Mereacre
- Institut für Anorganische Chemie
- KIT (Karlsruhe Institute of Technology)
- 76131 Karlsruhe
- Germany
| | - Christopher E. Anson
- Institut für Anorganische Chemie
- KIT (Karlsruhe Institute of Technology)
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institut für Anorganische Chemie
- KIT (Karlsruhe Institute of Technology)
- 76131 Karlsruhe
- Germany
- Institut für Nanotechnologie, KIT (Karlsruhe Institute of Technology)
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34
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Strautmann JBH, Dammers S, Limpke T, Parthier J, Zimmermann TP, Walleck S, Heinze-Brückner G, Stammler A, Bögge H, Glaser T. Design and synthesis of a dinucleating ligand system with varying terminal donor functions that provides no bridging donor and its application to the synthesis of a series of FeIII–μ-O–FeIII complexes. Dalton Trans 2016; 45:3340-61. [DOI: 10.1039/c5dt03711e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed the dinucleating ligands H4julia, susan, and H4hildeMe2 and present their μ-oxo diferric complexes.
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Affiliation(s)
| | - Susanne Dammers
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Thomas Limpke
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Janine Parthier
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | | | - Stephan Walleck
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Gabriele Heinze-Brückner
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Hartmut Bögge
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I
- Fakultät für Chemie
- Universität Bielefeld
- D-33615 Bielefeld
- Germany
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35
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Chen S, Mereacre V, Anson CE, Powell AK. A single molecule magnet to single molecule magnet transformation via a solvothermal process: Fe4Dy2 → Fe6Dy3. Dalton Trans 2016; 45:98-106. [DOI: 10.1039/c5dt03909f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Under ambient and solvothermal conditions four new compounds [FeIII4LnIII2(μ3-OH)2(mdea)4(m-NO2C6H4COO)8]·3MeCN and [FeIII6LnIII3(μ4-O)3(μ3-O)(mdea)5(m-NO2C6H4COO)9]·3MeCN (Ln = Y and Dy) have been synthesised and their magnetic properties investigated.
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Affiliation(s)
- Sihuai Chen
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Valeriu Mereacre
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
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36
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Goura J, Oyarzabal I, Colacio E, Chandrasekhar V. Synthesis, Structure, and Magnetic Properties of Phosphinate‐Bridged Hexanuclear Fe
III
Complexes Containing Two Butterfly‐Shaped Fe
3
O Cores. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500890] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Joydeb Goura
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Itziar Oyarzabal
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco, UPV/EHU, Paseo Manuel Lardizabal, n° 3, 20018 Donostia – San Sebastián, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida de Fuentenueva s/n, 18071 Granada, Spain, http://www.ugr.es
| | - Vadapalli Chandrasekhar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
- National Institute of Science Education and Research, Institute of Physics Campus, SachivalayaMarg, Sainik School, Bhubaneswar, Orissa 751005, India, http://www.niser.ac.in
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37
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Tong JP, Xu XJ, Yang DJ, Yu F, Li B. Mono-nuclear and Hexa-nuclear Iron(III) Compounds Based on Phenol-Pyrazole Ligand: Synthesis, Crystal Structure and Magnetic Properties. J Inorg Organomet Polym Mater 2015. [DOI: 10.1007/s10904-015-0250-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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38
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Mondal KC, Mereacre V, Kostakis GE, Lan Y, Anson CE, Prisecaru I, Waldmann O, Powell AK. A Strongly Spin-Frustrated Fe(III) 7 Complex with a Canted Intermediate Spin Ground State of S=7/2 or 9/2. Chemistry 2015; 21:10835-42. [PMID: 26073059 DOI: 10.1002/chem.201500841] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 11/08/2022]
Abstract
A disk-shaped [Fe(III) 7 (Cl)(MeOH)6 (μ3 -O)3 (μ-OMe)6 (PhCO2 )6 ]Cl2 complex with C3 symmetry has been synthesised and characterised. The central tetrahedral Fe(III) is 0.733 Å above the almost co-planar Fe(III) 6 wheel, to which it is connected through three μ3 -oxide bridges. For this iron-oxo core, the magnetic susceptibility analysis proposed a Heisenberg-Dirac-van Vleck (HDvV) mechanism that leads to an intermediate spin ground state of S=7/2 or 9/2. Within either of these ground state manifolds it is reasonable to expect spin frustration effects. The (57) Fe Mössbauer (MS) analysis verifies that the central Fe(III) ion easily aligns its magnetic moment antiparallel to the externally applied field direction, whereas the other six peripheral Fe(III) ions keep their moments almost perpendicular to the field at stronger fields. This unusual canted spin structure reflects spin frustration. The small linewidths in the magnetic Mössbauer spectra of polycrystalline samples clearly suggest an isotropic exchange mechanism for realisation of this peculiar spin topology.
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Affiliation(s)
- Kartik Chandra Mondal
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Valeriu Mereacre
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - George E Kostakis
- Institut für Nanotechnologie, Karlsruher Institut für Technologie, Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
| | - Yanhua Lan
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Christopher E Anson
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Ion Prisecaru
- WMOSS.ORG, Max-Beckmann-Str. 29, 76227, Karlsruhe (Germany).
| | - Oliver Waldmann
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg (Germany).
| | - Annie K Powell
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany). .,Institut für Nanotechnologie, Karlsruher Institut für Technologie, Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany).
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39
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Gu X, Jiang G, Jiang G, Chen T, Zhan W, Li X, Wu S, Tian S. Detection of dopamine on a mercapto-terminated hexanuclear Fe(III) cluster modified gold electrode. Talanta 2015; 137:189-96. [DOI: 10.1016/j.talanta.2015.01.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 01/21/2015] [Accepted: 01/25/2015] [Indexed: 10/24/2022]
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40
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Chen S, Mereacre V, Prodius D, Kostakis GE, Powell AK. Developing a “Highway Code” To Steer the Structural and Electronic Properties of FeIII/DyIII Coordination Clusters. Inorg Chem 2015; 54:3218-27. [DOI: 10.1021/ic502809y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sihuai Chen
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse
15, 76131 Karlsruhe, Germany
| | - Valeriu Mereacre
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse
15, 76131 Karlsruhe, Germany
| | - Denis Prodius
- Institute
of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz
Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute
of Chemistry, Academy of Sciences of Moldova, Academiei Street, 3, MD-2028 Chisinau, Republic of Moldova
| | - George E. Kostakis
- Institute
of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz
Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Annie K. Powell
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse
15, 76131 Karlsruhe, Germany
- Institute
of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz
Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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41
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Sasmal S, Roy S, Carrella L, Jana A, Rentschler E, Mohanta S. Structures and Magnetic Properties of Bis(μ‐phenoxido), Bis(μ‐phenoxido)‐μ‐carboxylato and Bis(μ‐phenoxido)bis(μ‐carboxylato) Fe
III
Ni
II
Compounds – Magnetostructural Correlations. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201402866] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sujit Sasmal
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India, http://173.201.183.21/~cuchemistry/?page_id=239
| | - Shuvayan Roy
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India, http://173.201.183.21/~cuchemistry/?page_id=239
| | - Luca Carrella
- Institut für Anorganische Chemie und Analytische Chemie, Johannes‐Gutenberg Universität Mainz, Duesbergweg 10‐14, 55128 Mainz, Germany, http://www.ak‐rentschler.chemie.uni‐mainz.de
| | - Arpita Jana
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India, http://173.201.183.21/~cuchemistry/?page_id=239
| | - Eva Rentschler
- Institut für Anorganische Chemie und Analytische Chemie, Johannes‐Gutenberg Universität Mainz, Duesbergweg 10‐14, 55128 Mainz, Germany, http://www.ak‐rentschler.chemie.uni‐mainz.de
| | - Sasankasekhar Mohanta
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700 009, India, http://173.201.183.21/~cuchemistry/?page_id=239
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42
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Mathivathanan L, Al-Ameed K, Lazarou K, Trávníček Z, Sanakis Y, Herchel R, McGrady JE, Raptis RG. A trigonal prismatic Cu6-pyrazolato complex containing a μ6-F ligand. Dalton Trans 2015; 44:20685-91. [DOI: 10.1039/c5dt03892h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The encapsulation of a fluoride ion in a trigonal prismatic CuII6-pyrazolato cage results in a small expansion of the Cu6-host.
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Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
| | - Karrar Al-Ameed
- Department of Chemistry
- South Parks Road
- University of Oxford
- UK
| | - Katerina Lazarou
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Attiki
- Greece
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Yiannis Sanakis
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Attiki
- Greece
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - John E. McGrady
- Department of Chemistry
- South Parks Road
- University of Oxford
- UK
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
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43
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Houton E, Meally ST, Sanz S, Brechin EK, Jones LF. Bulking up: Hexanuclear oximato Fe(III) complexes surrounded by sterically demanding co-ligands. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.06.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Bhattacharya S, Sasmal S, Carrella L, Rentschler E, Mohanta S. Syntheses, crystal structures and magnetic properties of a series of μ-phenoxo-μ1,1-carboxylato-μ1,3-carboxylato trinickel(II) compounds. Dalton Trans 2014; 43:12065-76. [PMID: 24983388 DOI: 10.1039/c4dt00862f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The work in this report describes the syntheses, characterization, crystal structures and magnetic properties of eight linear trinickel(ii) compounds of the composition [Ni(II)3(L(sal-pyr))2(propionate)4] (), [Ni(II)3(L(sal-pyr))2(benzoate)4]·CH3CN (), [Ni(II)3(L(sal-pip))2(acetate)4]·2CH3CN (), [Ni(II)3(L(sal-pip))2(propionate)4] (), [Ni(II)3(L(sal-pip))2(benzoate)4]·CH2Cl2 (), [Ni(II)3(L(sal-mor))2(propionate)4] (), [Ni(II)3(L(sal-mor))2(benzoate)4]·3CH2Cl2 () and [Ni(II)3(L(sal-mor))2(o-Cl-benzoate)4]·2CH3CN·2H2O (), where HL(sal-pyr), HL(sal-pip) and HL(sal-mor) are the 1 : 1 condensation products of salicylaldehyde and 1-(2-aminoethyl)-pyrrolidine, 1-(2-aminoethyl)-piperidine and 4-(2-aminoethyl)-morpholine, respectively. One-half of the trinuclear core in each complex is symmetry related to the second part due to the presence of an inversion centre on the central metal ion and so the terminal nickelcentral nickelterminal nickel angle is 180°. The terminal and central nickel(ii) ions are triply bridged by a phenoxo, a μ1,1-carboxylato and a μ1,3-carboxylato moiety. The μ1,1-carboxylato also acts as a chelating ligand for the terminal metal ion. Both the variable-temperature (2-300 K) susceptibilities at a fixed field strength of 0.1 T and variable-field (up to 7 T) magnetization at different fixed temperatures (2-10 K) were recorded. The magnetic data indicate the ferromagnetic interaction in all the cases with J (Ĥ = -2Jij∑SiSj) values ranging between 2.37 and 3.89 cm(-1) and the single-ion zero-field parameter (D) ranging between 7.21 and 8.94 cm(-1). Satisfactorily simulation of both the χMT vs. T and M vs. H data has been obtained. Comparison of the structures and magnetic properties of compounds with those of the previously published related systems reveals some interesting aspects.
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Affiliation(s)
- Sagarika Bhattacharya
- Department of Chemistry, University of Calcutta, 92 A. P. C Road, Kolkata 700 009, India.
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45
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An unprecedented zigzag-shaped heptanuclear ferric cluster: synthesis, structure and magnetism. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Walsh JPS, Sproules S, Chilton NF, Barra AL, Timco GA, Collison D, McInnes EJL, Winpenny REP. On the Possibility of Magneto-Structural Correlations: Detailed Studies of Dinickel Carboxylate Complexes. Inorg Chem 2014; 53:8464-72. [DOI: 10.1021/ic501036h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- James P. S. Walsh
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Stephen Sproules
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
- WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Nicholas F. Chilton
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses, 25, rue des
Martyrs, B.P. 166, 38042 Grenoble Cedex, France
| | - Grigore A. Timco
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - David Collison
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Eric J. L. McInnes
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Richard E. P. Winpenny
- School of Chemistry and Photon Science
Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
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47
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Nayak S, Novitchi G, Hołyńska M, Dehnen S. Two Heterometallic Ionic Compounds with Isolated [3d] and [4f] Complex Units: Field-Induced Single-Ion Magnet (SIM) Behavior Observed from a Mononuclear Dysprosium(III) Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402114] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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48
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Sheikh JA, Adhikary A, Konar S. Magnetic refrigeration and slow magnetic relaxation in tetranuclear lanthanide cages (Ln = Gd, Dy) with in situ ligand transformation. NEW J CHEM 2014. [DOI: 10.1039/c4nj00349g] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three tetranuclear lanthanide cages featuring either hemicubane (1 and 2) or distorted hemicubane (3) like cores are reported. Magnetic studies reveal significant magnetic entropy changes for complex 1 and a slow relaxation of magnetisation for 3.
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Affiliation(s)
| | - Amit Adhikary
- Department of Chemistry
- IISER Bhopal
- Bhopal 462066, India
| | - Sanjit Konar
- Department of Chemistry
- IISER Bhopal
- Bhopal 462066, India
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Jiang G, Wang M, Gu X, Chen T, Shang Y, Tang Y, Jiang G, Shi Y. Synthesis, structure and characterization of Fe6molecular clusters with peripheral sulfur atom-capped silver nanoparticles. CrystEngComm 2014. [DOI: 10.1039/c3ce41444b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Menelaou M, Vournari E, Psycharis V, Raptopoulou CP, Terzis A, Tangoulis V, Sanakis Y, Mateescu C, Salifoglou A. Heptanuclear antiferromagnetic Fe(III)-D-(-)-quinato assemblies with an S = 3/2 ground state-pH-specific synthetic chemistry, spectroscopic, structural, and magnetic susceptibility studies. Inorg Chem 2013; 52:13849-60. [PMID: 24266671 DOI: 10.1021/ic401036e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Iron is an essential metal ion with numerous roles in biological systems and advanced abiotic materials. D-(-)-quinic acid is a cellular metal ion chelator, capable of promoting reactions with metal M(II,III) ions under pH-specific conditions. In an effort to comprehend the chemical reactivity of well-defined forms of Fe(III)/Fe(II) toward α-hydroxycarboxylic acids, pH-specific reactions of: (a) [Fe3O(CH3COO)6(H2O)3]·(NO3)·4H2O with D-(-)-quinic acid in a molar ratio 1:3 at pH 2.5 and (b) Mohr's salt with D-(-)-quinic acid in a molar ratio 1:3 at pH 7.5, respectively, led to the isolation of the first two heptanuclear Fe(III)-quinato complexes, [Fe7O3(OH)3(C7H10O6)6]·20.5H2O (1) and (NH4)[Fe7(OH)6(C7H10O6)6]·(SO4)2·18H2O (2). Compounds 1 and 2 were characterized by analytical, spectroscopic (UV-vis, FT-IR, EPR, and Mössbauer) techniques, CV, TGA-DTG, and magnetic susceptibility measurements. The X-ray structures of 1 and 2 reveal heptanuclear assemblies of six Fe(III) ions bound by six doubly deprotonated quinates and one Fe(III) ion bound by oxido- and hydroxido-bridges (1), and hydroxido-bridges (2), all in an octahedral fashion. Mössbauer spectroscopy on 1 and 2 suggests the presence of Fe(III) ions in an all-oxygen environment. EPR measurements indicate that 1 and 2 retain their structure in solution, while magnetic measurements reveal an overall antiferromagnetic behavior with a ground state S = 3/2. The collective physicochemical properties of 1 and 2 suggest that the (a) nature of the ligand, (b) precursor form of iron, (c) pH, and (d) molecular stoichiometry are key factors influencing the chemical reactivity of the binary Fe(II,III)-hydroxycarboxylato systems, their aqueous speciation, and ultimately through variably emerging hydrogen bonding interactions, the assembly of multinuclear Fe(III)-hydroxycarboxylato clusters with distinct lattice architectures of specific dimensionality (2D-3D) and magnetic signature.
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Affiliation(s)
- M Menelaou
- Laboratory of Inorganic Chemistry, Department of Chemical Engineering, Aristotle University of Thessaloniki , Thessaloniki 54124, Greece
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