1
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Saha S, Akhtar S, Pramanik S, Bala S, Mondal R. Utilization of a trinuclear Cu-pyrazolate inorganic motif to build multifunctional MOFs. Dalton Trans 2024; 53:11021-11037. [PMID: 38881376 DOI: 10.1039/d4dt00986j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
The current work aims to generate multifunctional MOFs by incorporating a well-known inorganic motif, a trinuclear Cu-pyrazolate [Cu3(μ3-OH)(μ-Pyz)3] (T-CuP) unit, as a node of the network. Accordingly, we report herein the synthesis and properties of five new compounds using five V-shaped dicarboxylic acids as auxiliary ligands. The structural features are consistent with the theme of grafting T-CuP units as nodal points of architectures whose chassis are primarily made of bent acids. V-shaped acids also induce a helical nature inside resulting frameworks. Beside their structural and physical features, T-CuP unit-based MOFs also vindicate our thematic approach of the trinuclear Cu-pyrazolate unit imparting specific physicochemical properties, such as magnetic, electrical, and catalytic properties, to resultant MOFs. The MOFs show excellent catalytic properties in reducing 4-nitrophenol, which could be attributed to the porous nature of the network along with the presence of metal centres with unsaturated coordination within the T-CuP unit. Furthermore, efficient photocatalytic degradation of harmful organic dyes confirms their importance for environmental remediation. The presence of a T-CuP unit and various functional groups also make some of the MOFs suitable candidates for electrical applications, which is indeed manifested in encouraging proton conductivity. Finally, the potential of current MOFs, fitted with a magnetically important trinuclear Cu-pyrazolate motif, as magnetic materials has also been thoroughly investigated.
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Affiliation(s)
- Sayan Saha
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A &2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Sohel Akhtar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A &2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Subhendu Pramanik
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A &2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Sukhen Bala
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A &2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Raju Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A &2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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2
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Singh P, Al Isawi WA, Zeller M, Mezei G. Conversion of Metal Pyrazolate/(Hydr)oxide Clusters into Nanojars: Solution vs Solid-State Structure and Magnetism. Inorg Chem 2024; 63:12290-12298. [PMID: 38874076 PMCID: PMC11220756 DOI: 10.1021/acs.inorgchem.4c01698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 05/31/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
Nanojars are a class of anion binding and extraction agents composed of a series of [Cu(μ-OH)(μ-pz)]n (pz = pyrazolate; n = 26-36) supramolecular metal-organic complexes. In contrast to other anion binding agents amenable to liquid-liquid extraction, nanojars only form by self-assembly around the target anion, and guest-free nanojar hosts cannot be isolated. An extraordinary binding strength toward highly hydrophilic anions such as carbonate and sulfate was demonstrated by the inability of Ba2+ ions to precipitate the corresponding insoluble barium salts from nanojars. Herein, we provide an additional proof for the superior robustness of the nanojar framework based on competition experiments with other transition metal pyrazolate/(hydr)oxide complexes. In addition to the mass spectrometric characterization, we present variable-temperature nuclear magnetic resonance studies with an emphasis on the influence of the paramagnetic Cu2+ centers on 1H hyperfine shifts, along with X-ray crystallographic analysis of two polymorphs of (MePh3P)2[CO3⊂{Cu(OH)(pz)}27], including the highest (cubic) symmetry nanojar crystal lattice obtained to date as well as magnetism studies for the first time. Furthermore, we provide evidence for the first molybdate-incarcerating nanojars, [MoO4⊂{Cu(μ-OH)(μ-pz)}n]2- (n = 28, 31-33), formed by rearrangement from [MoVI8O12(μ-O)9(μ-pz)6(pzH)6·3pzH] in the presence of Cu2+ ions.
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Affiliation(s)
- Pooja Singh
- Department
of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
| | - Wisam A. Al Isawi
- Department
of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
| | - Matthias Zeller
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Gellert Mezei
- Department
of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
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3
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Stefanczyk O, Kumar K, Pai T, Li G, Ohkoshi SI. Integration of Trinuclear Triangle Copper(II) Secondary Building Units in Octacyanidometallates(IV)-Based Frameworks. Inorg Chem 2022; 61:8930-8939. [PMID: 35652381 DOI: 10.1021/acs.inorgchem.2c01294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The design and synthesis of high-dimensional materials based on secondary building blocks (SBUs) play a pivotal role in the further development of functional molecular materials. Herein, the self-assembly of Cu(II) ions, pyrazole (Hpz), and octacyanidometallate(IV) anions in the presence of water produced two new isostructural three-dimensional systems {[Cu3(μ3-OH)(μ-pz)3(H2O)3]2[M(CN)8]}·nH2O (M = W, 1, and Mo, 2). 1 and 2 consist of trinuclear triangle copper(II) (TTC) SBUs and octacyanidometallates(IV). At room temperature, both assemblies display strong antiferromagnetic interactions within the TTC entities with an average CuII···CuII isotropic magnetic coupling constant of about -145 cm-1. Moreover, a detailed analysis of magnetic data revealed the presence of spin frustration with antisymmetric magnetic exchange-coupling constants of around +32 and +46 cm-1 for 1 and 2, respectively. Finally, quantum chemical calculations explained their magnetic and optical properties.
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Affiliation(s)
- Olaf Stefanczyk
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kunal Kumar
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - TingYun Pai
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Guanping Li
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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4
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Al Isawi WA, Zeller M, Mezei G. Supramolecular Incarceration and Extraction of Tetrafluoroberyllate from Water by Nanojars. Inorg Chem 2022; 61:8611-8622. [PMID: 35617675 DOI: 10.1021/acs.inorgchem.2c01198] [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 previously unexplored noncovalent binding of the highly toxic tetrafluoroberyllate anion (BeF42-) and its extraction from water into organic solvents are presented. Nanojars resemble anion-binding proteins in that they also possess an inner anion binding pocket lined by a multitude of H-bond donors (OH groups), which wrap around the incarcerated anion and completely isolate it from the surrounding medium. The BeF4-binding propensity of [BeF4⊂{CuII(OH)(pz)}n]2- (pz = pyrazolate; n = 27-32) nanojars of different sizes is investigated using an array of techniques including mass spectrometry, paramagnetic 1H, 9Be, and 19F NMR spectroscopy, and X-ray crystallography, along with thermal stability studies in solution and chemical stability studies toward acidity and Ba2+ ions. The latter is found to be unable to precipitate the insoluble BaBeF4 from nanojar solutions, indicating a very strong binding of the BeF42- anion by nanojars. 9Be and 19F NMR spectroscopy allows for the unprecedented direct probing of the incarcerated anion in a nanojar and, along with 1H NMR studies, reveals the fluxional structure of nanojars and their inner anion-binding pockets. Single-crystal X-ray diffraction provides the crystal and molecular structures of (Bu4N)2[BeF4⊂{Cu(OH)(pz)}32], which contains a novel Cux-ring combination (x = 9 + 14 + 9), (Bu4N)2[BeF4⊂{Cu(OH)(pz)}8+14+9], and (Bu4N)2[BeF4⊂{Cu(OH)(pz)}6+12+10] and offers detailed structural parameters related to the supramolecular binding of BeF42- in these nanojars. The extraction of BeF42- from water into organic solvents, including the highly hydrophobic solvent n-heptane, demonstrates that nanojars are efficient binding and extracting agents not only for oxoanions but also for fluoroanions.
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Affiliation(s)
- Wisam A Al Isawi
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Gellert Mezei
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
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5
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Nan N, Zhou WH, Zhang J, Li W, Yang JT, Chen J, Xiong YC, Tan G. Phase transitions induced by exchange coupling, magnetic field, and temperature in a strongly correlated molecular trimer with triangular topology. Phys Chem Chem Phys 2022; 24:22546-22556. [DOI: 10.1039/d2cp03313e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Regulating the physical properties such as the quantum phase and the Kondo effect of molecular electronic devices near critical points may play a key role in increasing the robustness of...
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6
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Al-Karawi AJM, OmarAli AAB, Mangelsen S, Dege N, Kansız S, Breuninger P, Baydere C, OmarAli OB. An unprecedented formation of new copper(II) complexes as bioactive materials based on copper-catalyzed click reaction. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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New Syntheses, Analytic Spin Hamiltonians, Structural and Computational Characterization for a Series of Tri-, Hexa- and Hepta-Nuclear Copper (II) Complexes with Prototypic Patterns. CHEMISTRY 2021. [DOI: 10.3390/chemistry3010031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We present a series of pyrazolato-bridged copper complexes with interesting structures that can be considered prototypic patterns for tri-, hexa- and hepta- nuclear systems. The trinuclear shows an almost regular triangle with a μ3-OH central group. The hexanuclear has identical monomer units, the Cu6 system forming a regular hexagon. The heptanuclear can be described as two trinuclear moieties sandwiching a central copper ion via carboxylate bridges. In the heptanuclear system, the pyrazolate bridges are consolidating the triangular faces, which are sketching an elongated trigonal antiprism. The magnetic properties of these systems, dominated by the strong antiferromagnetism along the pyrazolate bridges, were described transparently, outlining the energy levels formulas in terms of Heisenberg exchange parameters J, within the specific topologies. We succeeded in finding a simple Kambe-type resolution of the Heisenberg spin Hamiltonian for the rather complex case of the heptanuclear. In a similar manner, the weak intermolecular coupling of two trimer units (aside from the strong exchange inside triangles) was resolved by closed energy formulas. The hexanuclear can be legitimately proposed as a case of coordination-based aromaticity, since the phenomenology of the six-spins problem resembles the bonding in benzene. The Broken-Symmetry Density Functional Theory (BS-DFT) calculations are non-trivial results, being intrinsically difficult at high nuclearities.
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8
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Boudalis AK. Half-Integer Spin Triangles: Old Dogs, New Tricks. Chemistry 2021; 27:7022-7042. [PMID: 33336864 DOI: 10.1002/chem.202004919] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/14/2020] [Indexed: 11/06/2022]
Abstract
Spin triangles, that is, triangular complexes of half-integer spins, are the oldest molecular nanomagnets (MNMs). Their magnetic properties have been studied long before molecular magnetism was delineated as a research field. This Review presents the history of their study, with references to the parallel development of new experimental investigations and new theoretical ideas used for their interpretation. It then presents an indicative list of spin-triangle families to illustrate their chemical diversity. Finally, it makes reference to recent developments in terms of theoretical ideas and new phenomena, as well as to the relevance of spin triangles to spintronic devices and new physics.
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Affiliation(s)
- Athanassios K Boudalis
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504, Université de Strasbourg, CNRS, 67000, Strasbourg, France.,Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
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9
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Alkorta I, Elguero J, Trujillo C, Sánchez-Sanz G. Interaction between Trinuclear Regium Complexes of Pyrazolate and Anions, a Computational Study. Int J Mol Sci 2020; 21:E8036. [PMID: 33126636 PMCID: PMC7663457 DOI: 10.3390/ijms21218036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 01/27/2023] Open
Abstract
The geometry, energy and electron density properties of the 1:1, 1:2 and 1:3 complexes between cyclic (Py-M)3 (M = Au, Ag and Cu) and halide ions (F-, Cl- and Br-) were studied using Møller Plesset (MP2) computational methods. Three different configurations were explored. In two of them, the anions interact with the metal atoms in planar and apical dispositions, while in the last configuration, the anions interact with the CH(4) group of the pyrazole. The energetic results for the 1:2 and 1:3 complexes are a combination of the specific strength of the interaction plus a repulsive component due to the charge:charge coulombic term. However, stable minima structures with dissociation barriers for the anions indicate that those complexes are stable and (Py-M)3 can hold up to three anions simultaneously. A search in the CSD confirmed the presence of (Pyrazole-Cu)3 systems with two anions interacting in apical disposition.
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Affiliation(s)
- Ibon Alkorta
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain;
| | - José Elguero
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain;
| | - Cristina Trujillo
- Trinity Biomedical Sciences Institute, School of Chemistry, Trinity Dublin College, D02 R590 Dublin 2, Ireland;
| | - Goar Sánchez-Sanz
- Irish Centre of High-End Computing, Grand Canal Quay, Dublin 2, Ireland
- School of Chemistry, University College Dublin, Belfield, D02 HP83 Dublin 4, Ireland
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10
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Vynohradov OS, Pavlenko VA, Fritsky IO, Gural’skiy IA, Shova S. Synthesis and Crystal Structure of Copper(II) 9-Azametallacrowns-3 with 4-Iodopyrazole. RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s0036023620100228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Mathivathanan L, Rogez G, Ben Amor N, Robert V, Raptis RG, Boudalis AK. Origin of Ferromagnetism and Magnetic Anisotropy in a Family of Copper(II) Triangles. Chemistry 2020; 26:12769-12784. [DOI: 10.1002/chem.202001028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute Florida International University Miami FL 33199 USA
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) CNRS/Université de Strasbourg UMR 7504 67000 Strasbourg France
| | - Nadia Ben Amor
- Laboratoire de Chimie et Physique Quantiques UMR 5626 CNRS/Université Paul Sabatier—Bat. 3R1B4 118 route de Narbonne 31062, Cedex 09 Toulouse France
| | - Vincent Robert
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra) Université de Strasbourg 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute Florida International University Miami FL 33199 USA
| | - Athanassios K. Boudalis
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra) Université de Strasbourg 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
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12
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Supramolecular Assemblies of Trinuclear Copper(II)-Pyrazolato Units: A Structural, Magnetic and EPR Study. CHEMISTRY 2020. [DOI: 10.3390/chemistry2030039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two anionic complexes, {[Cu3(µ3-OH)(µ-4-Ph-pz)3Cl3]2[Cu(4-Ph-pzH)4](µ-Cl)2}2− (1) and [Cu3(µ3-OH)(µ-pz)3(µ1,1-N3)2(N3)]− (2), crystallize as one-dimensional polymers, held together by weak Cu-(µ-Cl) and Cu-(µ-N3) interactions, respectively. Variable temperature magnetic susceptibility analyses determined the dominant antiferromagnetic intra-Cu3 exchange parameters in the solid state for both complexes, whereas the weak ferromagnetic inter-Cu3 interactions manifested also in the solid state EPR spectra, are absent in the corresponding frozen solution spectra. DFT calculations were employed to support the results of the magnetic susceptibility analyses.
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13
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Chen JH, Wei D, Yang G, Ma JG, Cheng P. A systematic investigation of structural transformation in a copper pyrazolato system: a case study. Dalton Trans 2020; 49:1116-1123. [PMID: 31894791 DOI: 10.1039/c9dt04263f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Dissolution-recrystallization structural transformation (DRST) is a powerful tool to unravel unequivocally the mechanism of dynamic conversion processes, based on the structures of the initial reactants, final products and sometimes intermediates isolated from the reaction mixture. Herein, we illustrate the details of the conversion processes of (CuIpz)3 into [CuII(OH)pz]6 (pzH = 4-chloro-3,5-diphenylpyrazole) through DRSTs. Based on crystal structure determination and spectroscopic methods, the most encountered species, (CuIpz)3, is in equilibrium with (CuIpz)4 in solution with the tetramer becoming dominant at low temperature, indicating an entropy-controlled conversion between these two structural isomers. The CuI trimer/tetramer in solution further experiences an oxidation if exposed to the open air, resulting in the formation of a pentanuclear mixed-valence intermediate CuI3CuII2(OMe)2pz5 which can be isolated as single crystals at -20 °C and has been structurally characterized for the first time. The final product isolated from the solution is the fully oxidized hexanuclear [CuII(OMe)pz]6, which is easily transformed into [CuII(OH)pz]6 in the presence of humidity.
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Affiliation(s)
- Jing-Huo Chen
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
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14
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Szałowski K, Kowalewska P. Magnetocaloric Effect in Cu5-NIPA Molecular Magnet: A Theoretical Study. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E485. [PMID: 31963940 PMCID: PMC7014091 DOI: 10.3390/ma13020485] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/13/2020] [Accepted: 01/16/2020] [Indexed: 11/17/2022]
Abstract
We calculated the magnetocaloric properties of the molecular nanomagnet Cu5-NIPA, consisting of five spins S = 1 / 2 arranged in two corner-sharing triangles (hourglass-like structure without magnetic frustration). The thermodynamics of the system in question was described using the quantum Heisenberg model solved within the field ensemble (canonical ensemble) using exact numerical diagonalization. The dependence of the magnetic entropy and magnetic specific heat on the temperature and the external magnetic field was investigated. The isothermal entropy change for a wide range of initial and final magnetic fields was discussed. Due to plateau-like behavior of the isothermal entropy change as a function of the temperature, a high degree of tunability of magnetocaloric effect with the initial and final magnetic field was demonstrated.
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Affiliation(s)
- Karol Szałowski
- Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, ulica Pomorska 149/153, PL90-236 Łódź, Poland
| | - Pamela Kowalewska
- Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, ulica Pomorska 149/153, PL90-236 Łódź, Poland
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Galassi R, Rawashdeh-Omary MA, Dias HVR, Omary MA. Homoleptic Cyclic Trinuclear d10 Complexes: from Self-Association via Metallophilic and Excimeric Bonding to the Breakage Thereof via Oxidative Addition, Dative Bonding, Quadrupolar, and Heterometal Bonding Interactions. COMMENT INORG CHEM 2019. [DOI: 10.1080/02603594.2019.1666371] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rossana Galassi
- School of Science and Technology, University of Camerino, Camerino, Italy
| | | | - H. V. Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, USA
| | - Mohammad A. Omary
- Department of Chemistry, University of North Texas, Denton, Texas, USA
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16
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Ferrer S, Hernández-Gil J, Valverde-Muñoz FJ, Lloret F, Castiñeiras A. Hexanuclear Cu 3O-3Cu triazole-based units as novel core motifs for high nuclearity copper(ii) frameworks. RSC Adv 2019; 9:29357-29367. [PMID: 35528438 PMCID: PMC9071962 DOI: 10.1039/c9ra05922a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/06/2019] [Indexed: 12/25/2022] Open
Abstract
The asymmetric 3,5-disubstituted 1,2,4-triazole ligand H2V (5-amino-3-picolinamido-1,2,4-triazole) by reaction with an excess of Cu(ii) perchlorate (Cu : H2V being 12 : 1) has produced a novel hexanuclear {Cu6(μ3-O/H)(HV/V)3} fragment, with one triangular Cu3(μ3-O/H) group connected to three peripheral single Cu(ii) ions through a cis-cis-trans bridging mode of the ligand, which is the building block of the three structures described here: one hexanuclear, [Cu6(μ3-O)(HV)3(ClO4)7(H2O)9]·8H2O (1), one dodecanuclear, [Cu12(μ3-O)2(V)6(ClO4)5(H2O)18](ClO4)3·6H2O (2), and one tetradecanuclear 1D-polymer, {[Cu14(μ3-OH)2(V)6(HV)(ClO4)11(H2O)20](ClO4)2·14H2O} n (3), the last two containing hexanuclear subunits linked by perchlorato bridges. The Cu-Cu av. intra-triangle distance is 3.352(2) Å and the Cu(central)-Cu(bridged external) av. distance is 5.338(3) Å. The magnetic properties of the hexanuclear "Cu3O-3Cu" cluster have been studied, resulting as best fit parameters: g = 2.18(1), J(intra-triangle) = -247.0(1) cm-1 and j(central CuII - external CuII) = -5.15(2) cm-1.
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Affiliation(s)
- Sacramento Ferrer
- Departament de Química Inorgànica, Universitat de València Av. Vicent Andrés Estellés, s/n, 46100 Burjassot Valencia Spain
| | - Javier Hernández-Gil
- Departament de Química Inorgànica, Universitat de València Av. Vicent Andrés Estellés, s/n, 46100 Burjassot Valencia Spain
| | - Francisco Javier Valverde-Muñoz
- Institut de Ciència Molecular (ICMol), Universitat de València C/Catedrático José Beltrán Martínez, 2, 46980 Paterna Valencia Spain
| | - Francisco Lloret
- Institut de Ciència Molecular (ICMol), Universitat de València C/Catedrático José Beltrán Martínez, 2, 46980 Paterna Valencia Spain
| | - Alfonso Castiñeiras
- Departamento de Química Inorgánica, Facultad de Farmacia, Universidad de Santiago de Compostela Praza do Seminario de Estudos Galegos, s/n 15782 Santiago de Compostela Spain
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17
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Shi K, Mathivathanan L, Boudalis AK, Turek P, Chakraborty I, Raptis RG. Nitrite Reduction by Trinuclear Copper Pyrazolate Complexes: An Example of a Catalytic, Synthetic Polynuclear NO Releasing System. Inorg Chem 2019; 58:7537-7544. [DOI: 10.1021/acs.inorgchem.9b00748] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaige Shi
- Department of Chemistry and Biochemistry and Biomolecular Sciences Institute, Florida International University, 11200 SW Eighth Street, Miami, Florida 33199, United States
| | - Logesh Mathivathanan
- Department of Chemistry and Biochemistry and Biomolecular Sciences Institute, Florida International University, 11200 SW Eighth Street, Miami, Florida 33199, United States
| | - Athanassios K. Boudalis
- Institut de Chimie UMR 7177/Université de Strasbourg 4, rue Blaise Pascal/CS 90032, F-67081 Strasbourg CEDEX, France
| | - Philippe Turek
- Institut de Chimie UMR 7177/Université de Strasbourg 4, rue Blaise Pascal/CS 90032, F-67081 Strasbourg CEDEX, France
| | - Indranil Chakraborty
- Department of Chemistry and Biochemistry and Biomolecular Sciences Institute, Florida International University, 11200 SW Eighth Street, Miami, Florida 33199, United States
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry and Biomolecular Sciences Institute, Florida International University, 11200 SW Eighth Street, Miami, Florida 33199, United States
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18
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Gusev A, Nemec I, Herchel R, Shul'gin V, Ryush I, Kiskin M, Efimov N, Ugolkova E, Minin V, Lyssenko K, Eremenko I, Linert W. Copper(ii) self-assembled clusters of bis((pyridin-2-yl)-1,2,4-triazol-3-yl)alkanes. Unusual rearrangement of ligands under reaction conditions. Dalton Trans 2019; 48:3052-3060. [PMID: 30758390 DOI: 10.1039/c8dt04816a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The reaction of two structurally related bridging ligands bis[5-(2-pyridyl)-1,2,4-triazole-3-yl]methane (H2L1) and bis[5-(2-pyridyl)-1,2,4-triazole-3-yl]ethane (H2L2) with copper(ii) salts resulted in a surprising wide variety of complex structures [Cu2(H2L1)Cl2]Cl2·4CH3OH (1), [Cu4(L1)4]·4H2O (2), [Cu(H2L2)(ClO4)2] (3) and [Cu3(OH)Na2(L')6](ClO4)·5H2O·C3H6O (4), where HL' is 3,5-bis-(pyridin-2-yl)-1,2,4-triazole, which were structurally characterized by the X-ray diffraction method. Complexes 1 and 2 were prepared on the H2L1 basis and have binuclear and tetranuclear structures, respectively, demonstrating strong impact of the type of counter anion on the coordination mode of the ligand. In contrast, the reaction between Cu(ClO4)2 6H2O and H2L2 led to the preparation of mononuclear complex 3. The reaction of H2L2 with Cu(ClO4)2 under alkaline conditions led to oxidative rearrangement of the ligand and the homoleptic pentanuclear complex 4 with anionic ligand L' was prepared. Magnetic properties were studied for compounds 1, 2 and 4 and for all of them the antiferromagnetic interactions between the Cu atoms were confirmed and analyzed by the spin Hamiltonian formalism. Furthermore, the occurrence of the antisymmetric exchange was confirmed in 4. The magnetic data analysis was supported by the X-band EPR measurements performed for complexes 1, 2 and 4.
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Affiliation(s)
- Alexey Gusev
- General and Physical Chemistry Department, V.I. Vernadsky Crimean Federal University, Acad. Vernadsky av. 4, Simferopol, 295007, Crimea.
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19
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Kreiger DI, Mathivathanan L, Raptis RG. Coordination polymers based on pyrazole-4-carboxaldehyde-containing Cu 3N 6 metallacycles as building units. CrystEngComm 2019. [DOI: 10.1039/c9ce00421a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two novel topologies were obtained by self-assembly of 4-formylpyrazolate-Cu3 SBUs in the absence of competing terminal ligands.
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Affiliation(s)
- David I. Kreiger
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
| | - Logesh Mathivathanan
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
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20
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Boudalis AK, Robert J, Turek P. First Demonstration of Magnetoelectric Coupling in a Polynuclear Molecular Nanomagnet: Single-Crystal EPR Studies of [Fe3
O(O2
CPh)6
(py)3
]ClO4
⋅py under Static Electric Fields. Chemistry 2018; 24:14896-14900. [DOI: 10.1002/chem.201803038] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Athanassios K. Boudalis
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 F-67081 Strasbourg France
| | - Jérôme Robert
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 F-67081 Strasbourg France
- Sorbonne Université, CNRS; Laboratoire Jean Perrin, LJP; F-75005 Paris France
| | - Philippe Turek
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 F-67081 Strasbourg France
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21
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Titov AA, Filippov OA, Epstein LM, Belkova NV, Shubina ES. Macrocyclic copper(I) and silver(I) pyrazolates: Principles of supramolecular assemblies with Lewis bases. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.07.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Carlotto S, Pandolfo L, Casarin M. Trinuclear Cu(II) complexes from the classic [Cu 2 (RCOO) 4 (H 2 O) 2 ] lantern complex and pyrazole: a DFT modelling of the reaction path. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.04.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Mathivathanan L, Boudalis AK, Turek P, Pissas M, Sanakis Y, Raptis RG. Interactions between H-bonded [CuII3(μ3-OH)] triangles; a combined magnetic susceptibility and EPR study. Phys Chem Chem Phys 2018; 20:17234-17244. [DOI: 10.1039/c8cp02643b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-band EPR spectroscopy and magnetic susceptibility studies elucidate the magnetic exchange scheme within a triangular CuII3(μ3-OH) complex and the intermolecular dipolar interactions between two H-bonded CuII3(μ3-OH) units.
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Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute
- Florida International University
- Miami
- USA
| | - Athanassios K. Boudalis
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute
- Florida International University
- Miami
- USA
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra)
| | - Philippe Turek
- Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra)
- Université de Strasbourg
- F-67081 Strasbourg
- France
| | - Michael Pissas
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Athens
- Greece
| | - Yiannis Sanakis
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Athens
- Greece
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute
- Florida International University
- Miami
- USA
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24
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Messai A, Bilge D, Bilge M, Parlak C. New Cu(II) coordination polymer by chiral tridentate Schiff base ligand. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Synthesis, characterization, structure and DNA binding aspects of a trinuclear copper(II) complex having a Cu3O core. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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26
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Haiduc I. Inverse coordination – An emerging new chemical concept. Oxygen and other chalcogens as coordination centers. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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27
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Zhabanov YA, Giricheva NI, Zakharov AV, Islyaikin MK. Distinctive features of the structure of hemihexaphyrazine complexes with Y, La, and Lu according to quantum chemical data. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.07.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Switchable Multiple Spin States in the Kondo description of Doped Molecular Magnets. Sci Rep 2017; 7:42255. [PMID: 28176869 PMCID: PMC5296747 DOI: 10.1038/srep42255] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/04/2017] [Indexed: 12/21/2022] Open
Abstract
We show that introducing electrons in magnetic clusters and molecular magnets lead to rich phase diagrams with a variety of low-spin and high-spin states allowing for multiple switchability. The analysis is carried out for a quantum spin-fermion model using the exact diagonalization, and the cluster mean-field approach. The model is relevant for a number of molecular magnets with triangular motifs consisting of transition metal ions such as Cr, Cu and V. Re-entrant spin-state behavior and chirality on-off transitions exist over a wide parameter regime. A subtle competition among geometrical frustration effects, electron itinerancy, and Kondo coupling at the molecular level is highlighted. Our results demonstrate that electron doping provides a viable mean to tame the magnetic properties of molecular magnets towards potential technological applications.
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29
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Ramos Silva M, Coutinho JT, Pereira LCJ, Martín-Ramos P, Waerenborgh JC. Synthesis, structure and physical properties of a low dimensional compound. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 172:9-13. [PMID: 27374318 DOI: 10.1016/j.saa.2016.06.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 06/20/2016] [Accepted: 06/23/2016] [Indexed: 05/25/2023]
Abstract
The crystal structure of (μ3-oxo)hexakis(cyanoacetato-κO,O')(cyanoacetato-κO)diaquatriiron(III) cyanoacetic acid shows the formation of trinuclear complexes in a hydrogen-bond network that bonds all the molecules in a 3D arrangement. For this complex, within whose clusters the whole magnetic interaction takes place, 57Fe Mössbauer spectroscopy shows that the Fe cations are in the S=5/2 state in the temperature range 2-295K. The asymmetric broadening of the absorption peaks below 80K is consistent with strong antiferromagnetic interactions between the metal spins. The magnetization measurements also show the antiferromagnetic character of the spin ensemble and an ST=1/2 magnetic ground state typical of triangular systems with similar J between Fe-Fe pairs.
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Affiliation(s)
- Manuela Ramos Silva
- CFisUC, Department of Physics, University of Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal.
| | - Joana T Coutinho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Laura C J Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Pablo Martín-Ramos
- CFisUC, Department of Physics, University of Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal; Higher Polytechnic School of Huesca, University of Zaragoza, Ctra. Cuarte s/n, 22071 Huesca, Spain
| | - João C Waerenborgh
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
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30
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Massignani S, Scatena R, Lanza A, Monari M, Condello F, Nestola F, Pettinari C, Zorzi F, Pandolfo L. Coordination polymers from mild condition reactions of copper(II) carboxylates with pyrazole (Hpz). Influence of carboxylate basicity on the self-assembly of the [Cu3(μ3-OH)(μ-pz)3]2+ secondary building unit. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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31
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Boudalis AK, Rogez G, Heinrich B, Raptis RG, Turek P. Towards ionic liquids with tailored magnetic properties: bmim+ salts of ferro- and antiferromagnetic CuII3 triangles. Dalton Trans 2017; 46:12263-12273. [DOI: 10.1039/c7dt02472j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
With proper selection of counteraction and pH control, CuII3-pyrazolate anions can form a ferromagnetic low-melting solid, or an antiferromagnetic viscous paste.
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Affiliation(s)
- Athanassios K. Boudalis
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute
- Florida International University
- Miami
- USA
- Institut de Chimie de Strasbourg (UMR 7177
| | - Guillaume Rogez
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
- UMR 7504
- F-67000 Strasbourg
| | - Benoît Heinrich
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
- UMR 7504
- F-67000 Strasbourg
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry and the Biomolecular Sciences Institute
- Florida International University
- Miami
- USA
| | - Philippe Turek
- Institut de Chimie de Strasbourg (UMR 7177
- CNRS-Unistra)
- Université de Strasbourg
- F-67081 Strasbourg
- France
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32
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Pandolfo L, Pettinari C. Trinuclear copper(ii) pyrazolate compounds: a long story of serendipitous discoveries and rational design. CrystEngComm 2017. [DOI: 10.1039/c7ce00009j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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33
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Metallacrown-based compounds: Applications in catalysis, luminescence, molecular magnetism, and adsorption. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.04.017] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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34
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Surmann SA, Mezei G. Halogen-bonded network of trinuclear copper(II) 4-iodo-pyrazolate complexes formed by mutual breakdown of chloro-form and nanojars. Acta Crystallogr E Crystallogr Commun 2016; 72:1517-1520. [PMID: 27840698 PMCID: PMC5095823 DOI: 10.1107/s205698901601536x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 09/29/2016] [Indexed: 11/30/2022]
Abstract
Crystals of bis-(tetra-butyl-ammonium) di-μ3-chlorido--tris-(μ2-4-iodo-pyrazolato-κ2N:N')tris-[chlorido-cuprate(II)] 1,4-dioxane hemisolvate, (C16H36N)2[Cu3(C3H2IN2)3Cl5]·0.5C4H8O or (Bu4N)2[CuII3(μ3-Cl)2(μ-4-I-pz)3Cl3]·0.5C4H8O, were obtained by evaporating a solution of (Bu4N)2[{CuII(μ-OH)(μ-4-I-pz)} n CO3] (n = 27-31) nanojars in chloro-form/1,4-dioxane. The decomposition of chloro-form in the presence of oxygen and moisture provides HCl, which leads to the breakdown of nanojars to the title trinuclear copper(II) pyrazolate complex, and possibly CuII ions and free 4-iodo-pyrazole. CuII ions, in turn, act as catalyst for the accelerated decomposition of chloro-form, ultimately leading to the complete breakdown of nanojars. The crystal structure presented here provides the first structural description of a trinuclear copper(II) pyrazolate complex with iodine-substituted pyrazoles. In contrast to related trinuclear complexes based on differently substituted 4-R-pyrazoles (R = H, Cl, Br, Me), the [Cu3(μ-4-I-pz)3Cl3] core in the title complex is nearly planar. This difference is likely a result of the presence of the iodine substituent, which provides a unique, novel feature in copper pyrazolate chemistry. Thus, the iodine atoms form halogen bonds with the terminal chlorido ligands of the surrounding complexes [mean length of I⋯Cl contacts = 3.48 (1) Å], leading to an extended two-dimensional, halogen-bonded network along (-110). The cavities within this framework are filled by centrosymmetric 1,4-dioxane solvent mol-ecules, which create further bridges via C-H⋯Cl hydrogen bonds with terminal chlorido ligands of the trinuclear complex not involved in halogen bonding.
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Affiliation(s)
- Stuart A. Surmann
- Department of Chemistry, Western Michigan University, Kalamazoo, MI 49006
| | - Gellert Mezei
- Department of Chemistry, Western Michigan University, Kalamazoo, MI 49006
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35
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Ahmed BM, Mezei G. From Ordinary to Extraordinary: Insights into the Formation Mechanism and pH-Dependent Assembly/Disassembly of Nanojars. Inorg Chem 2016; 55:7717-28. [DOI: 10.1021/acs.inorgchem.6b01172] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Basil M. Ahmed
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008-5413, United States
| | - Gellert Mezei
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008-5413, United States
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36
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Synthesis of trinuclear CuII-complex with tris(4-triphenylmethylphenoxy)-substituted hemihexaphyrazine and radioprotective properties of its water-soluble form. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-1049-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Belinsky MI. Spin Chirality of Cu3 and V3 Nanomagnets. 1. Rotation Behavior of Vector Chirality, Scalar Chirality, and Magnetization in the Rotating Magnetic Field, Magnetochiral Correlations. Inorg Chem 2016; 55:4078-90. [DOI: 10.1021/acs.inorgchem.5b02202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moisey I. Belinsky
- School of Chemistry, Tel-Aviv University, Tel Aviv, Ramat Aviv 69978, Israel
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38
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Belinsky MI. Spin Chirality of Cu3 and V3 Nanomagnets. 2. Frustration, Temperature, and Distortion Dependence of Spin Chiralities and Magnetization in the Rotating and Tilted Magnetic Fields. Inorg Chem 2016; 55:4091-109. [DOI: 10.1021/acs.inorgchem.5b02204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Moisey I. Belinsky
- School of Chemistry, Tel-Aviv University, Tel Aviv, Ramat Aviv 69978, Israel
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39
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Ahmed BM, Calco B, Mezei G. Tuning the structure and solubility of nanojars by peripheral ligand substitution, leading to unprecedented liquid-liquid extraction of the carbonate ion from water into aliphatic solvents. Dalton Trans 2016; 45:8327-39. [PMID: 27048621 DOI: 10.1039/c6dt00847j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Nanojars, a novel class of neutral anion-incarcerating agents of the general formula [Cu(II)(OH)(pz)]n (Cun; n = 27-31, pz = pyrazolate anion), efficiently sequester various oxoanions with large hydration energies from water. In this work, we explore whether substituents on the pyrazole ligand interfere with nanojar formation, and whether appropriate substituents could be employed to tune the solubility of nanojars in solvents of interest, such as long-chain aliphatic hydrocarbons (solvent of choice for large-scale liquid-liquid extraction processes) and water. To this end, we conducted a comprehensive study using 40 different pyrazole ligands, with one, two or three substituents in their 3-, 4- and 5-positions. The corresponding nanojars are characterized by single-crystal X-ray diffraction and/or electrospray-ionization mass spectrometry (ESI-MS). The results show that Cun-nanojars with various substituents in the pyrazole 4-position, including long chains, phenyl and CF3 groups, can be obtained. Straight chains are also tolerated at the pyrazole 3-position, and favor the Cu30-nanojar. Homoleptic nanojars, however, could not be obtained with phenyl or CF3 groups. Nevertheless, if used in mixture with the parent non-substituted pyrazole, sterically hindered pyrazoles do form heteroleptic nanojars. With 3,5-disubstituted pyrazoles, only heteroleptic nanojars are accessible. The crystal structure of novel nanojars (Bu4N)2[CO3⊂{Cu30(OH)30(3,5-Me2pz)y(pz)30-y}] (y = 14 and 15) is presented. We find that in contrast to the parent nanojar, which is insoluble in aliphatic solvents and water, nanojars with alkyl substituents are soluble in saturated hydrocarbon solvents, whereas nanojars based on novel pyrazoles, functionalized with oligoether chains, are readily soluble in water. Liquid-liquid extraction of carbonate from water under basic pH is presented for the first time.
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Affiliation(s)
- Basil M Ahmed
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, USA.
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40
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Mathivathanan L, Cruz R, Raptis RG. A [Cu3(μ3-O)]-pyrazolate metallacycle with terminal nitrate ligands exhibiting point group symmetry 3. Acta Crystallogr E Crystallogr Commun 2016; 72:492-4. [PMID: 27375872 PMCID: PMC4910335 DOI: 10.1107/s2056989016003741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/04/2016] [Indexed: 11/10/2022]
Abstract
The trinuclear triangular cuprate anion of the title compound, tris-[bis-(tri-phenyl-phospho-ranyl-idene)ammonium] tris-(μ2-4-chloro-pyrazolato-κ(2) N:N')-μ3-oxido-tris-[(nitrato-κ(2) O,O')cuprate(II)] nitrate monohydrate, (C36H30P2N)[Cu3(C3H2ClN2)3(NO3)3O]NO3·H2O, has point group symmetry 3., with the μ3-O atom located on the threefold rotation axis. The distorted square-pyramidal coordination sphere of the Cu(II) atom is completed by two N atoms of trans-bridging pyrazolate groups and a chelating nitrate anion. The complex anion is slightly bent, with the nitrate and pyrazolate groups occupying positions above and below the Cu3 plane, respectively. In the crystal, weak O-H⋯O and C-H⋯O hydrogen bonds, as well as π-π inter-actions, are present.
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Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
| | - Raquel Cruz
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
| | - Raphael G. Raptis
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
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41
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Ahmed BM, Szymczyna BR, Jianrattanasawat S, Surmann SA, Mezei G. Survival of the Fittest Nanojar: Stepwise Breakdown of Polydisperse Cu27-Cu31 Nanojar Mixtures into Monodisperse Cu27(CO3) and Cu31(SO4) Nanojars. Chemistry 2016; 22:5499-503. [PMID: 26892568 DOI: 10.1002/chem.201600271] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Indexed: 01/05/2023]
Abstract
Nanojars are emerging as a class of anion sequestration agents of unparalleled efficiency. Dinegative oxoanions (e.g., carbonate, sulfate) template the formation of a series of homologous nanojars [Cu(OH)(pyrazolato)]n (n=27-31). Pyridine selectively transforms less stable, larger CO3(2-) nanojars (n=30, 31) into more stable, smaller ones (n=27, 29), but leaves all SO4(2-) nanojars (n=27-29, 31) intact. Ammonia, in turn, transforms all less stable nanojars into the most stable one and allows the isolation of pure [CO3(2-)⊂{Cu(OH)(pz)}27] and [SO4(2-)⊂{Cu(OH)(pz)}31]. A comprehensive picture of the solution and solid-state intricacies of nanojars was revealed by a combination of variable temperature NMR spectroscopy, tandem mass spectrometry, and X-ray crystallography.
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Affiliation(s)
- Basil M Ahmed
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, 49008-5413, USA
| | - Blair R Szymczyna
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, 49008-5413, USA
| | - Sarut Jianrattanasawat
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, 49008-5413, USA
| | - Stuart A Surmann
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, 49008-5413, USA
| | - Gellert Mezei
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, 49008-5413, USA.
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42
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Chakraborty A, Escuer A, Ribas J, Maji TK. A discrete CuII6 cluster and a 3D MnII–CuII framework based on assembly of Mn2Cu4 clusters: synthesis, structure and magnetic properties. Dalton Trans 2016; 45:15523-15531. [DOI: 10.1039/c6dt03094g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new magnetic metal–organic coordination compounds, a 0D Cu6 cluster and a 3D heterometallic framework with MnII2CuII4 secondary building units are synthesized. Detailed magnetic studies are performed with proper magneto-structural correlation.
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Affiliation(s)
- Anindita Chakraborty
- Molecular Materials Laboratory
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bangalore 560 064
- India
| | - Albert Escuer
- Departament de Quimica Inorganica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Joan Ribas
- Departament de Quimica Inorganica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Tapas Kumar Maji
- Molecular Materials Laboratory
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bangalore 560 064
- India
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43
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Cheng M, Sun L, Han W, Wang S, Liu Q, Sun X, Xi H. Effect of N ancillary ligands on the structure, nuclearity and magnetic behavior of Cu(ii)–pyrazolecarboxylate complexes. NEW J CHEM 2016. [DOI: 10.1039/c6nj02338j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first discrete cyclic-trinuclear copper(ii)–pyrazolato complex without any μ3 ligand core was synthesized and its magnetic properties were investigated.
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Affiliation(s)
- Meiling Cheng
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Lin Sun
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Wei Han
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Shen Wang
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Qi Liu
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
- State Key Laboratory of Coordination Chemistry
| | - Xiaoqiang Sun
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Haitao Xi
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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44
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Hu TP, Xue ZJ, Zheng BH, Wang XQ, Hao XN, Song Y. Two novel nickel(ii) and cobalt(ii) metal–organic frameworks based on a rigid aromatic multicarboxylate ligand: syntheses, structural characterization and magnetic properties. CrystEngComm 2016. [DOI: 10.1039/c6ce00674d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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45
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Löffler M, Gregoliński J, Korabik M, Lis T, Lisowski J. Multinuclear Ni(ii), Cu(ii) and Zn(ii) complexes of chiral macrocyclic nonaazamine. Dalton Trans 2016; 45:15586-15594. [DOI: 10.1039/c6dt02504h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Herein, we report the preparation and crystal structures of Ni(ii), Cu(ii) and Zn(ii) complexes. For both the Ni(ii) and Cu(ii) compounds, a magnetostructural correlation was established.
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Affiliation(s)
- Marta Löffler
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | | | - Maria Korabik
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - Tadeusz Lis
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - Jerzy Lisowski
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
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46
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Wang Z, Jagličić Z, Han LL, Zhuang GL, Luo GG, Zeng SY, Tung CH, Sun D. Octanuclear Ni(ii) cubes based on halogen-substituted pyrazolates: synthesis, structure, electrochemistry and magnetism. CrystEngComm 2016. [DOI: 10.1039/c6ce00528d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Giri GC, Haldar S, Carrella L, Panda AB, Musie GT, Bera M. Synthesis, structure, spectral characterization and DNA binding affinity of new water soluble trinuclear copper(II) complexes with partial cubane Cu3O4 cores. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.06.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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48
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Feng C, Sun LN, Huang HH, Qu ZR, Zhao H. One Novel Trinuclear Nickel(II) Cluster Containing a Pyramidal Ni3(μ 3-OH) Core: Crystal Structure and Hirshfeld Surface Analysis. J CLUST SCI 2015. [DOI: 10.1007/s10876-015-0904-8] [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]
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49
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Frost JM, Stirling RJ, Sanz S, Vyas N, Nichol GS, Rajaraman G, Brechin EK. Turning a "useless" ligand into a "useful" ligand: a magneto-structural study of an unusual family of Cu(II) wheels derived from functionalised phenolic oximes. Dalton Trans 2015; 44:10177-87. [PMID: 25856756 DOI: 10.1039/c5dt00884k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While the phenolic oximes (R-saoH2) are well known for producing monometallic complexes of the type [M(II)(R-saoH)2] with Cu(II) ions in near quantitative yield, their derivatisation opens the door to much more varied and interesting coordination chemistry. Here we show that combining the complimentary diethanolamine and phenolic oxime moieties into one organic framework (H4L1 and H4L2) allows for the preparation and isolation of an unusual family of [Cu(II)]n wheels, including saddle-shaped, single-stranded [Cu(II)8] wheels of general formula [Cu8(HL1)4(X)4](n)[Y] (when n = 0, X = Cl(-), NO3(-), AcO(-), N3(-); when n = 2+ X = (OAc)2/(2,2'-bpy)2 and Y = [BF4]2) and [Cu8(HL2)4(X)4] (X = Cl(-), Br(-)), a rectangular [Cu6(HL1)4] wheel, and a heterometallic [Cu4Na2(HL1)2(H2L1)2] hexagon. Magnetic studies show very strong antiferromagnetic exchange between neighbouring metal ions, leading to diamagnetic ground states in all cases. DFT studies reveal that the magnitude of the exchange constants are correlated to the Cu-N-O-Cu dihedral angles, which in turn are correlated to the planarity/puckering of the [Cu(II)]n rings.
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Affiliation(s)
- Jamie M Frost
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK.
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50
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Spielberg ET, Gilb A, Plaul D, Geibig D, Hornig D, Schuch D, Buchholz A, Ardavan A, Plass W. A Spin-Frustrated Trinuclear Copper Complex Based on Triaminoguanidine with an Energetically Well-Separated Degenerate Ground State. Inorg Chem 2015; 54:3432-8. [DOI: 10.1021/ic503095t] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eike T. Spielberg
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Aksana Gilb
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Daniel Plaul
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Daniel Geibig
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - David Hornig
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Dirk Schuch
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Arzhang Ardavan
- Centre for Advanced Spin Resonance, Clarendon Laboratory, University of Oxford, OX1 3PU Oxford, United Kingdom
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743 Jena, Germany
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