1
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Soldevila-Sanmartín J, Calvet T, Font-Bardia M, Choquesillo-Lazarte D, Pons J. Variable behaviour of a flexible bispyrazole ligand: a Co(II) polymer and a unique Cu(II) penta-coordinated dimer. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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2
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Copper(II) coordination polymer based on l-arginine as a supramolecular hybrid inorganic–organic material: synthesis, structural, spectroscopic and magnetic properties. RESEARCH ON CHEMICAL INTERMEDIATES 2023. [DOI: 10.1007/s11164-023-04957-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
AbstractWe report the synthesis and structural, spectroscopic and magnetic properties of new 1D coordination polymeric complex {[Cu(μ-l-Arg)2]SO4⋅1.5H2O}n (1) that contains asymmetric μ−O,O’ carboxylic bridge linking distorted square-pyramidal [Cu(μ-l-Arg)2]2+ coordination units. In 1D, the syn−anti−μ2−η1:η1zigzag polymer conformation, the adjacent Cu(II) ions are distanced by 5.707 Å, and the subsequent Cu∙∙∙Cu proximity in 1D-coordination chain equals 6.978 Å. Detailed interpretation of IR and Raman spectra of l-arginine and 1 was performed. The principal components of the g tensor determined from EPR experiments (gx = 2.059, gy = 2.075, gz = 2.228) indicate nearly axial symmetry of Cu(II) coordination sphere and correspond to the unpaired electron occupying the dx2–y2 orbital. The single broad band at 16,200 cm–1, characteristic of d−d transition, is assigned to the dominant dublet-dublet 2B1g(dx2–y2)→ 2Eg(dyz≈dxz) transition. Magnetic susceptibility measurements have revealed ferromagnetic coupling between the Cu(II) ions within the 1D-coordination chain, while the intermolecular coupling is antiferromagnetic.
Graphical Abstract
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3
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Gregoliński J, Ślepokura K, Kłak J, Witwicki M. Multinuclear Ni(II) and Cu(II) complexes of a meso 6 + 6 macrocyclic amine derived from trans-1,2-diaminocyclopentane and 2,6-diformylpyridine. Dalton Trans 2022; 51:9735-9747. [PMID: 35703400 DOI: 10.1039/d2dt01329k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four hexanuclear chloride and sulphate Ni(II) and Cu(II) complexes 1, 2, 4 and 5 and one tetranuclear nitrate Cu(II) complex 3 have been synthesised from appropriate metal salts and 6 + 6 octadecaaza macrocyclic ligands. All obtained coordination compounds have been characterised by elemental analysis, spectroscopic methods (ESI MS, NMR and EPR), magnetic susceptibility measurements and X-ray crystallography. Their X-ray crystal structures reveal different coordination modes of metal cations involved in the obtained centro-symmetrical coordination compounds. The conformational folding of the macrocyclic ligand adopted in the respective complexes depends on the number of metal cations bound within the macrocycle but not on their type. The cavities of these multinuclear complexes might be occupied by solvent molecules and counter anions bound by hydrogen bonds or might be empty in the case where the macrocyclic ring of the ligand is squeezed in the middle. All obtained Ni(II) and Cu(II) coordination compounds are paramagnetic. This has been proved by their 1H NMR and EPR spectra and magnetic measurements. Direct current (DC) variable-temperature magnetic susceptibility measurements on the polycrystalline samples of 1-5 were carried out in the temperature range of 1.8-300 K. The magnetic behaviour of 1 and 2 is dominated by the magnetic anisotropy of the nickel(II) ion masking the magnetic interactions between magnetic centres. The magnetic data of 3-5 reveal small antiferromagnetic interactions within the Cu4 and Cu6 units. EPR experiments for 3-5 show, at 9.6 and 34 GHz frequencies, that the predominant contribution to the orbitals occupied by the unpaired electrons in the ground state originates from dx2-y2.
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Affiliation(s)
- Janusz Gregoliński
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Katarzyna Ślepokura
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Julia Kłak
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Maciej Witwicki
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
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4
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Gamage EH, Ribeiro RA, Harmer CP, Canfield PC, Ozarowski A, Kovnir K. Tuning of Cr-Cr Magnetic Exchange through Chalcogenide Linkers in Cr 2 Molecular Dimers. Inorg Chem 2022; 61:6160-6174. [PMID: 35412816 DOI: 10.1021/acs.inorgchem.2c00298] [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
A set of three Cr-dimer compounds, Cr2Q2(en)4X2 (Q: S, Se; X: Br, Cl; en: ethylenediamine), with monoatomic chalcogenide bridges have been synthesized via a single-step solvothermal route. Chalcogenide linkers mediate magnetic exchange between Cr3+ centers, while bidentate ethylenediamine ligands complete the distorted octahedral coordination of Cr centers. Unlike the compounds previously reported, none of the chalcogenide atoms are connected to extra ligands. Magnetic susceptibility studies indicate antiferromagnetic coupling between Cr3+ centers, which are moderate in Cr2Se2(en)4X2 and stronger in Cr2S2(en)4Cl2. Fitting the magnetic data requires a biquadratic exchange term. High-frequency EPR spectra showing characteristic signals due to coupled S = 1 spin states could be interpreted in terms of the "giant spin" Hamiltonian. A fourth compound, Cr2Se8(en)4, has a single diatomic Se bridge connecting the two Cr3+ centers and shows weak ferromagnetic exchange interactions. This work demonstrates the tunability in strength and type of exchange interactions between metal centers by manipulating the interatomic distances and number of bridging chalcogenide linkers.
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Affiliation(s)
- Eranga H Gamage
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.,Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Raquel A Ribeiro
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Colin P Harmer
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.,Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Paul C Canfield
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, 1800 E Paul Dirac Dr, Tallahassee, Florida 32310, United States
| | - Kirill Kovnir
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.,Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
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Majumder A, Dutta N, Das A, Carrella L, Bera M. Exploring new water soluble bridged dicopper(II) assemblies: Synthesis, structure, spectroscopic characterization, properties, and their interactions with d-glucosamine. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115417] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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6
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Zhang C, Wang H, Lan X, Shi YE, Wang Z. Modulating Emission of Nonconventional Luminophores from Nonemissive to Fluorescence and Room-Temperature Phosphorescence via Dehydration-Induced Through-Space Conjugation. J Phys Chem Lett 2021; 12:1413-1420. [PMID: 33522814 DOI: 10.1021/acs.jpclett.0c03614] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Processing nonconventional luminophores into ultralong room-temperature phosphorescence (RTP) materials with bright emission is extremely difficult but highly desired because of their intrinsic advantages together with the relatively weak spin-orbit coupling and rapid nonradiative decay in comparison to traditional aromatic compounds. Here, a straightforward heat treatment method was developed to promote the intersystem crossing efficiency and to suppress nonradiative pathways. A "dehydration-induced through-space conjugation" mechanism was proposed for explaining the activating of fluorescence and RTP of nonconventional luminophores. RTP materials with a phosphorescence quantum yield of 23.8% and emission lifetime of 1.3 s are developed. In addition, the emission color and lifetimes can be modulated by tuning the structure of ligands, which allows their applications in multilevel information encryption. These results open the door for designing highly efficient ultralong RTP materials, which also provides a clue to clarify the detailed emission profiles of RTP materials.
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Affiliation(s)
- Chuanchuan Zhang
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
| | - Henggang Wang
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
| | - Xingwang Lan
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
| | - Yu-E Shi
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
| | - Zhenguang Wang
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
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Iron(III) and cyano-bridged dinuclear copper(II) complexes: synthesis, structures and magnetic property of the copper(II) complex. J CHEM SCI 2020. [DOI: 10.1007/s12039-020-01807-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Nesterova OV, Pombeiro AJL, Nesterov DS. Novel H-Bonded Synthons in Copper Supramolecular Frameworks with Aminoethylpiperazine-Based Ligands. Synthesis, Structure and Catalytic Activity. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5435. [PMID: 33260358 PMCID: PMC7731324 DOI: 10.3390/ma13235435] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/17/2020] [Accepted: 11/25/2020] [Indexed: 11/26/2022]
Abstract
New Schiff base complexes [Cu2(HL1)(L1)(N3)3]∙2H2O (1) and [Cu2L2(N3)2]∙H2O (2) were synthesized. The crystal structures of 1 and 2 were determined by single-crystal X-ray diffraction analysis. The HL1 ligand results from the condensation of salicylaldehyde and 1-(2-aminoethyl)piperazine, while a new organic ligand, H2L2, was formed by the dimerization of HL1 via a coupling of two piperazine rings of HL1 on a carbon atom coming from DMF solvent. The dinuclear building units in 1 and 2 are linked into complex supramolecular networks through hydrogen and coordination bondings, resulting in 2D and 1D architectures, respectively. Single-point and broken-symmetry DFT calculations disclosed negligible singlet-triplet splittings within the dinuclear copper fragments in 1 and 2. Catalytic studies showed a remarkable activity of 1 and 2 towards cyclohexane oxidation with H2O2 in the presence of nitric acid and pyridine as promoters and under mild conditions (yield of products up to 21%). Coordination compound 1 also acts as an active catalyst in the intermolecular coupling of cyclohexane with benzamide using di-tert-butyl peroxide (tBuOOtBu) as a terminal oxidant. Conversion of benzamide at 55% was observed after 24 h reaction time. By-product patterns and plausible reaction mechanisms are discussed.
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Affiliation(s)
- Oksana V. Nesterova
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (O.V.N.); (A.J.L.P.)
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (O.V.N.); (A.J.L.P.)
| | - Dmytro S. Nesterov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (O.V.N.); (A.J.L.P.)
- Research Institute of Chemistry, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., 117198 Moscow, Russia
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9
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Kock FVC, Higuera-Padilla AR, Vigatto MDSS, Martin Neto L, Colnago LA. Magnetic resonance studies of copper (II) sorbitol complex, in solution, reveal a supramolecular structure compatible to the crystal structure. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:404-411. [PMID: 30864253 DOI: 10.1002/mrc.4863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/23/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
Although the Cu2+ -sorbitol complex [Cu2+ -Sorb] structure in crystalline state has been determined by X rays, it is not known in solution, where most studies of this complex are performed. Therefore, the goal of this work was to obtain information about the structure of this complex in aqueous solution using nuclear magnetic resonance and electron paramagnetic resonance spectroscopies. The magnetic resonance results indicate that the complex is formed at approximately pH 12. In this pH the sorbitol 1 H relaxation times were so short (broad line) that was not possible to use standard nuclear magnetic resonance parameters (nuclear Overhauser effect and spin-spin coupling constants values) to solve the three-dimensional structure. However, valuable structural information about the complex in solution was obtained. The relaxation results indicate that the Cu2+ ions are buried in the structure and not accessible to solvent; the 1 H and 13 C spectra shows strong paramagnetic shift effect indicating short distance between these nuclei and Cu2+ in the structure. No electron paramagnetic resonance signal was observed in pH 12 indicating strong Cu2+ - Cu2+ dipolar interaction, compatible to Cu2+ -Cu2+ distances measured in crystal, from 1.148 to 1.393 Angstroms. The complex self-diffusion coefficient (D) of 1.58 × 10-10 m2 /s value, determined by Diffusion-Ordered Spectroscopy, is compatible to a molecular weight of 3-6 KDa. Therefore, these results corroborate that the [Cu2+ -Sorb] complex is assembled in solution, at pH 12, with several structural parameters compatible to the toroidal hexadecacuprate supramolecular structure determined in solid state.
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10
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Baryshnikova AT, Minaev BF, Baryshnikov GV, Ågren H. Computational study of the structure and magnetic properties of the weakly-coupled tetranuclear square-planar complex of Cu(II) with a tetraporphyrin sheet. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Liu X, Ma X, Yang J, Luo S, Wang Z, Ferrando-Soria J, Ma Y, Shi Q, Pardo E. Solvent-induced single-crystal-to-single-crystal transformation and tunable magnetic properties of 1D azido-Cu(ii) chains with a carboxylate bridge. Dalton Trans 2019; 48:11268-11277. [DOI: 10.1039/c9dt02031d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The solvent effect leads to structural transformation and tunable magnetism of chain-like azido-copper coordination polymers.
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Affiliation(s)
- Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Xiufang Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Jinhui Yang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Shuchang Luo
- School of Chemical Engineering
- Guizhou University of Engineering Science
- Bijie
- China
| | - Zheng Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Jesús Ferrando-Soria
- Departamento de Química Inorgánica
- Instituto de Ciencia Molecular (ICMOL)
- Universidad de Valencia
- Paterna 46980, Valencia
- Spain
| | - Yulong Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Quan Shi
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Emilio Pardo
- Departamento de Química Inorgánica
- Instituto de Ciencia Molecular (ICMOL)
- Universidad de Valencia
- Paterna 46980, Valencia
- Spain
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12
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Coulton JB, Smith AC, Wheeler KA, Semeniuc RF. Multiple coordination modes of a new ditopic bis(pyrazolyl)methane-based ligand. Dalton Trans 2018; 47:17109-17121. [PMID: 30465668 DOI: 10.1039/c8dt03992e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A new ditopic ligand, N-(2,2-bis(pyrazolyl)ethyl)-2,2-bis(pyrazolyl)acetamide ((pz)2CH-C(O)-NH-CH2-CH(pz)2, L4Pz, pz = pyrazolyl ring), comprising two bis(pyrazolyl)methane donor groups linked via an amide bridge, has been prepared from the reaction of HOOCCH(pz)2 and H2NCH2CH(pz)2. The ligand coordinates to various metallic salts (i.e. AgO3SCF3, PdCl2, Re(CO)5Br, and Fe(BF4)2), in either a κ2-μ-κ2 or a κ3-μ-κ2 fashion, depending on the coordination preferences of the metallic center. These compounds were characterized by NMR, UV-Vis and IR spectroscopy, and in solid state by single crystal X-ray diffraction. In the case of silver(i), a mono-dimensional coordination polymer was obtained, while the others were found to be discrete complexes. The synthesis and characterization of a heterobimetallic complex is also described. In solid state, all compounds are associated into supramolecular architectures via hydrogen bonding and pyrazolyl embrace interactions.
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Affiliation(s)
- John B Coulton
- Department of Chemistry and Biochemistry, Eastern Illinois University, Charleston, Illinois 61920, USA.
| | - Aramis C Smith
- Department of Chemistry and Biochemistry, Eastern Illinois University, Charleston, Illinois 61920, USA.
| | - Kraig A Wheeler
- Department of Chemistry, Whitworth University, Spokane, Washington 99251, USA
| | - Radu F Semeniuc
- Department of Chemistry and Biochemistry, Eastern Illinois University, Charleston, Illinois 61920, USA.
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13
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Cu(II)–N6-Alkyladenine Complexes: Synthesis, X-ray Characterization and Magnetic Properties. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Montenegro-Pohlhammer N, Páez-Hernández D, Calzado CJ, Arratia-Pérez R. A theoretical study of the super exchange mechanism and magneto-structural relationships in the [Mn(iii)2(μ-F)F4(Me3tacn)2](PF6) coordination compound. NEW J CHEM 2018. [DOI: 10.1039/c8nj02793e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed theoretical study of the electronic structure and magnetic properties of the dinuclear Mn(iii) complex, [Mn(iii)2(μ-F)F4(Me3tacn)2] (complex 1), with a single fluoride bridge is reported.
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Affiliation(s)
| | - Dayán Páez-Hernández
- Relativistic Molecular Physics Group (ReMoPh)
- Universidad Andrés Bello
- Santiago
- Chile
| | - Carmen J. Calzado
- Departamento de Química Física
- Universidad de Sevilla
- 41012 Sevilla
- Spain
| | - Ramiro Arratia-Pérez
- Relativistic Molecular Physics Group (ReMoPh)
- Universidad Andrés Bello
- Santiago
- Chile
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Baryshnikov GV, Minaev BF, Baryshnikova AT, Ågren H. A computational study of structural and magnetic properties of bi- and trinuclear Cu(II) complexes with extremely long Cu---Cu distances. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2017.04.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Cui SX, Wang HY, Xu J, Zhang JP. Theoretical studies on magnetic properties of a binuclear paddle wheel Cu(II) complex {Cu2(μ2-O2CCH3)4}(OCNH2CH3)2. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2017. [DOI: 10.1134/s0036024417060085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Reger DL, Pascui AE, Foley EA, Smith MD, Jezierska J, Wojciechowska A, Stoian SA, Ozarowski A. Dinuclear Metallacycles with Single M–X–M Bridges (X = Cl–, Br–; M = Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II)): Strong Antiferromagnetic Superexchange Interactions. Inorg Chem 2017; 56:2884-2901. [PMID: 28218526 DOI: 10.1021/acs.inorgchem.6b02933] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry
and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Andrea E. Pascui
- Department of Chemistry
and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Elizabeth A. Foley
- Department of Chemistry
and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mark D. Smith
- Department of Chemistry
and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Julia Jezierska
- Faculty of Chemistry, University of Wrocław, 50-383 Wrocław, Poland
| | | | - Sebastian A. Stoian
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
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Sakiyama H, Chiba Y, Tone K, Yamasaki M, Mikuriya M, Krzystek J, Ozarowski A. Magnetic Properties of a Dinuclear Nickel(II) Complex with 2,6-Bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate. Inorg Chem 2017; 56:138-146. [PMID: 27976888 DOI: 10.1021/acs.inorgchem.6b01671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetic properties of dinuclear nickel(II) complex [Ni2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (1), where (sym-hmp)- is 2,6-bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate anion and DMF indicates dimethylformamide, were investigated using high-frequency and -field electron paramagnetic resonance (HFEPR). To magnetically characterize the mononuclear nickel(II) species forming the dimer, its two dinuclear zinc(II) analogues, [Zn2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (2) and [Zn2(sym-hmp)2](BPh4)2·2acetone·2H2O (2'), were prepared. One of them (2') was structurally characterized by X-ray diffractometry and doped with 5% mol nickel(II) ions to prepare a mixed crystal 3. From the HFEPR results on complex 1 obtained at 40 K, the spin Hamiltonian parameters of the first excited spin state (S = 1) of the dimer were accurately determined as |D1| = 9.99(2) cm-1, |E1| = 1.62(1) cm-1, and g1 = [2.25(1), 2.19(2), 2.27(2)], and for the second excited spin state (S = 2) at 150 K estimated as |D2| ≈ 3.5 cm-1. From these numbers, the single-ion zero-field splitting (ZFS) parameter of the Ni(II) ions forming the dimer was estimated as |DNi| ≈ 10-10.5 cm-1. The HFEPR spectra of 3 yielded directly the single-ion parameters for DNi = +10.1 cm-1, |ENi| = 3.1 cm-1, and giso = 2.2. On the basis of the HFEPR results, the previously obtained magnetic data (Sakiyama, H.; Tone, K.; Yamasaki, M.; Mikuriya, M. Inorg. Chim. Acta 2011, 365, 183) were reanalyzed, and the isotropic interaction parameter between the Ni(II) ions was determined as J = -70 cm-1 (Hex = -J SA·SB). Finally, density functional theory calculations yielded the J value of -90 cm-1 in a qualitative agreement with the experiment.
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Affiliation(s)
- Hiroshi Sakiyama
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Yukako Chiba
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Katsuya Tone
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Mikio Yamasaki
- X-ray Research Laboratory, Rigaku Corporation , Matsubara 3-9-12, Akishima, Tokyo 196-8666, Japan
| | - Masahiro Mikuriya
- Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-based Devices, School of Science and Technology, Kwansei Gakuin University , Gakuen 2-1, Sanda 669-1337, Japan
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
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Naveen P, Jain R, Kalaivani P, Shankar R, Dallemer F, Prabhakaran R. Unpredicted formation of copper(ii) complexes containing 2-thiophen-2-yl-1-thiophen-2-ylmethyl-1H-benzoimidazole and their most promising in vitro cytotoxicity in MCF-7 and HeLa cell lines over cisplatin. NEW J CHEM 2017. [DOI: 10.1039/c7nj01273j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An in situ reaction of CuCl2·2H2O, o-phenylenediamine, thiophene-2-carbaldehyde and sodium azide in methanol afforded complex 1a.
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Affiliation(s)
- P. Naveen
- Department of Chemistry
- Bharathiar University
- Coimbatore 641 046
- India
| | - Ruchi Jain
- Department of Molecular Reproduction
- Development and Genetics
- Indian Institute of Science
- Bangalore 560012
- India
| | - P. Kalaivani
- Department of Chemistry
- Nirmala College for Women
- Bharathiar University
- Coimbatore-641 018
- India
| | - R. Shankar
- Department of Physics
- Bharathiar University
- Coimbatore-641046
- India
| | - F. Dallemer
- Laboratoire Chimie Provence-CNRS
- UMR7246
- Université of Aix-Marseille
- Campus Scientifique de Saint-Jérôme
- F-13397 Marseille Cedex 20
| | - R. Prabhakaran
- Department of Chemistry
- Bharathiar University
- Coimbatore 641 046
- India
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20
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Zeng Y, Liu SJ, Liu CM, Xie YR, Du ZY. Diversified magnetic behaviors of new nickel(ii) and copper(ii) azido coordination polymers templated by diethyl or triethyl amines. NEW J CHEM 2017. [DOI: 10.1039/c6nj03268k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The reactions of NiII or CuII ions with N3− anions in the presence of templated diethyl or triethyl amines afford three new azido-bridged coordination polymers, which exhibit metamagnetism, spin glass and canted ferromagnetism, respectively.
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Affiliation(s)
- Ying Zeng
- Key Laboratory of Jiangxi University for Functional Materials Chemistry
- College of Chemistry and Chemical Engineering
- Gannan Normal University
- Ganzhou 341000
- P. R. China
| | - Sui-Jun Liu
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences
- Center for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Yong-Rong Xie
- Key Laboratory of Jiangxi University for Functional Materials Chemistry
- College of Chemistry and Chemical Engineering
- Gannan Normal University
- Ganzhou 341000
- P. R. China
| | - Zi-Yi Du
- Key Laboratory of Jiangxi University for Functional Materials Chemistry
- College of Chemistry and Chemical Engineering
- Gannan Normal University
- Ganzhou 341000
- P. R. China
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21
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Liu X, Li F, Ma X, Cen P, Luo S, Shi Q, Ma S, Wu Y, Zhang C, Xu Z, Song W, Xie G, Chen S. Coligand modifications fine-tuned the structure and magnetic properties of two triple-bridged azido-Cu(ii) chain compounds exhibiting ferromagnetic ordering and slow relaxation. Dalton Trans 2017; 46:1207-1217. [DOI: 10.1039/c6dt04108f] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two triple-bridged azido-Cu(ii) compounds with different benzoates as coligands exhibit distinct magnetic properties.
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22
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Anion-induced exchange interactions in binuclear complexes of Cu(II) with flexible hexadentate bispicolylamidrazone ligands. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Ozarowski A, Calzado CJ, Sharma RP, Kumar S, Jezierska J, Angeli C, Spizzo F, Ferretti V. Metal–Metal Interactions in Trinuclear Copper(II) Complexes [Cu3(RCOO)4(H2TEA)2] and Binuclear [Cu2(RCOO)2(H2TEA)2]. Syntheses and Combined Structural, Magnetic, High-Field Electron Paramagnetic Resonance, and Theoretical Studies. Inorg Chem 2015; 54:11916-34. [DOI: 10.1021/acs.inorgchem.5b02199] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Carmen J. Calzado
- Departamento de Química Física, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Sevilla, Spain
| | - Raj Pal Sharma
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Santosh Kumar
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Julia Jezierska
- Faculty of Chemistry, Wroclaw University, 14 F. Joliot Curie Str., 50-383 Wroclaw, Poland
| | | | - Federico Spizzo
- Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Via Saragat 1, I-44122 Ferrara, Italy
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24
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Hu BW, Zheng XY, Ding C. Metal–organic coordination architectures of tetrazole heterocycle ligands bearing acetate groups: Synthesis, characterization and magnetic properties. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.08.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Liu PP, Sheng L, Song XQ, Xu WY, Liu YA. Synthesis, structure and magnetic properties of a new one dimensional manganese coordination polymer constructed by a new asymmetrical ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.05.026] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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