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Daul WG, Hirrle M, Eisfeld B, Kraft M, von Nidda HAK, Volkmer D. Heteropentanuclear {Ru(II)Cu(II) 4} Kuratowski Complexes Assembled from a Ruthenium(II) Precursor Complex to Study Competing Exchange Interactions in M(II)(ta) 2 Networks [ta(-) = 1,2,3-Triazolate]. Inorg Chem 2024; 63:5027-5039. [PMID: 38440999 DOI: 10.1021/acs.inorgchem.3c04478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
We report a directed two-step synthesis toward pentanuclear Kuratowski complexes. First, six 5,6-dimethylbenzo[1,2,3]triazole ligands (Me2btaH) are coordinated to a single Ru(II) ion, providing a topologically ideal template for the addition of further metal ions. The synthesis and crystal structures of [RuCu4X4(Me2bta)6] [X = acetylacetonate (acac) and tris(3,5-dimethyl-1-pyrazolyl)borate (Tp*)] are described. Both represent new members of the family of so-called Kuratowski (K3,3) complexes. The coordination units feature triazolato-bridged metal-centered {MM4} tetrahedra, which are known for frustrated magnetic interactions in both complexes and metal-organic frameworks. The novel Ru(II)-centered complexes were synthesized in order to investigate the influence of the presence or absence of a paramagnetic central metal ion in the Kuratowski complex. Superconducting quantum interference device and electron spin resonance measurements demonstrate that small deviations in bond lengths and valence angles can lead to the formation of pairs of magnetic exchange-coupled Cu(II) ions. Which Cu(II) ions pair up can be predicted in Jahn-Teller active compounds by the overlap of the respective orbitals. These data are compared with those gleaned for M(II)(ta)2 (ta = 1,2,3-triazolate) lattices, in which structurally similar {MM4} tetrahedra constitute the secondary building units.
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Affiliation(s)
- Wiebke G Daul
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Marcel Hirrle
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Bennett Eisfeld
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Maryana Kraft
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | | | - Dirk Volkmer
- University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
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2
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Qiao N, Xin XY, Guan XF, Zhang CX, Wang WM. Self-Assembly Bifunctional Tetranuclear Ln 2Ni 2 Clusters: Magnetic Behaviors and Highly Efficient Conversion of CO 2 under Mild Conditions. Inorg Chem 2022; 61:15098-15107. [PMID: 36094135 DOI: 10.1021/acs.inorgchem.2c02180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of heterometallic tetranuclear clusters, Ln2Ni2(NO3)4L4(μ3-OCH3)2·2(CH3CN) (Ln = Gd(1), Tb(2), Dy(3), Ho(4), Er(5); HL = methyl 3-methoxysalicylate), were synthesized solvothermally. The intramolecular synergistic effect of two metal centers of Ln(III) and Ni(II) and the exposed multimetallic sites serving as Lewis acid activators greatly increase the efficiency of the CO2 conversion, and the yield for cluster 3 can be achieved at 96% at atmospheric pressure and low temperature. In particular, the self-assembly multimetal center with polydentate ligand shows good generality and enhanced recyclability. The design of such 3d-4f heterometallic clusters provides an effective strategy for the conversion of CO2 under greener conditions. Meanwhile, magnetic investigations indicate that cluster 1 is a good candidate for magnetic refrigerant materials with a relatively large magnetocaloric effect (MCE) (-ΔSm = 28.5 J kg-1 K-1 at 3.0 K and 7.0 T), and cluster 3 shows single-molecular magnet behavior under zero dc field. Heterometallic clusters with special magnetic properties and good catalytic behavior for the conversion of CO2 are rare. Thus, they are potential bifunctional materials applied in practice.
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Affiliation(s)
- Na Qiao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China.,College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, P. R. China
| | - Xiao-Yan Xin
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, P. R. China
| | - Xiao-Fen Guan
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, P. R. China
| | - Chen-Xi Zhang
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Wen-Min Wang
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, P. R. China
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3
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New wheel-shaped Ln6 clusters for conversion of CO2 and magnetic properties. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Konieczny P, Sas W, Czernia D, Pacanowska A, Fitta M, Pełka R. Magnetic cooling: a molecular perspective. Dalton Trans 2022; 51:12762-12780. [PMID: 35900061 DOI: 10.1039/d2dt01565j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The magnetocaloriceffect is considered as an energy-efficient and environmentally friendly technique which can take cooling technology to the next level. Apart from its commercial application at room temperature, magnetic refrigeration is an up-and-coming solution for the cryogenic regime, especially as an alternative to He3 systems. Molecular magnets reveal advantageous features for ultra-low cooling which are competitive with intermetallic and lanthanide alloys. Here, we present a guide to the current status of magnetocaloric effect research of molecular magnets with a theoretical background focused on the inverse magnetocaloric effect and an overview of recent results and developments, including the rotating magnetocaloric effect.
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Affiliation(s)
- Piotr Konieczny
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
| | - Wojciech Sas
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
| | - Dominik Czernia
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
| | | | - Magdalena Fitta
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
| | - Robert Pełka
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
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5
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Cutler DJ, Coletta M, Singh MK, Canaj AB, McCormick LJ, Coles SJ, Schnack J, Brechin EK. An [Fe III8] molecular oxyhydroxide. Dalton Trans 2022; 51:8945-8948. [PMID: 35611692 DOI: 10.1039/d2dt01477g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An [FeIII8] hexagonal bipyramid displays antiferromagnetic exchange between the two capping tetrahedral ions and the six ring octahedral ions resulting in a spin ground state of S = 10.
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Affiliation(s)
- Daniel J Cutler
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Marco Coletta
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Mukesh K Singh
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Angelos B Canaj
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Laura J McCormick
- EPSRC National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Simon J Coles
- EPSRC National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Jürgen Schnack
- Universitat Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
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Qiao N, Li XX, Chen Y, Xin XY, Yang C, Dong SS, Wang YZ, Li XJ, Hua YP, Wang WM. Three Ln2 compounds (Gd2, Tb2 and Dy2) with a Ln2O2 center showing magnetic refrigeration property and single-molecular magnet behavior. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Cutler DJ, Singh MK, Nichol GS, Evangelisti M, Schnack J, Cronin L, Brechin EK. [Fe 15]: a frustrated, centred tetrakis hexahedron. Chem Commun (Camb) 2021; 57:8925-8928. [PMID: 34396373 DOI: 10.1039/d1cc03919a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of two different FeIII salts in a solvothermal reaction with triethanolamine results in the formation of a high symmetry [FeIII15] cluster whose structure conforms to a centred, tetrakis hexahedron.
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Affiliation(s)
- Daniel J Cutler
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Mukesh K Singh
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Gary S Nichol
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jürgen Schnack
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
| | - Leroy Cronin
- School of Chemistry, The University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, Scotland, UK.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland, UK.
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8
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Lutter JC, Boron TT, Chadwick KE, Davis AH, Kleinhaus S, Kampf JW, Zaleski CM, Pecoraro VL. Identification of slow magnetic relaxation and magnetocoolant capabilities of heterobimetallic lanthanide-manganese metallacrown-like compounds. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115190] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Lazari G, Grammatikopoulos S, Perlepes SP, Stamatatos TC. Combining benzotriazoles and azides in copper(II) chemistry: synthesis, structural and spectroscopic characterization of a 1-D corrugated tape [Cu(N 3) 2(1-Mebta)] n coordination polymer (1-Mebta = 1-methylbenzotriazole). J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1934460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Wen W, Meng YS, Jiao CQ, Liu Q, Zhu HL, Li YM, Oshio H, Liu T. Ferromagnetic Archimedean polyhedra {Fe 24M 18} (M = Fe, Ni, and Mn) with tunable electron configurations. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00593f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Three symmetric nanocages {Fe24M18} that mimic the Archimedean polyhedra, namely pseudo-rhombicuboctahedron, were synthesized. Their electron configurations depend highly on the changes of metal ions and the deprotonation of auxiliary ligands.
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Affiliation(s)
- Wen Wen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Cheng-Qi Jiao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Hai-Lang Zhu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Ya-Ming Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Hiroki Oshio
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China
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11
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Salerno EV, Kampf JW, Pecoraro VL, Mallah T. Magnetic properties of two Gd IIIFe III4 metallacrowns and strategies for optimizing the magnetocaloric effect of this topology. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00207d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Two Gd3+ [12-MCFeIII(N)shi-4] metallacrowns are analyzed for magnetic properties, and calculations concerning the magnetic exchange parameters of this topology are considered.
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Affiliation(s)
- Elvin V. Salerno
- Department of Chemistry
- Willard H. Dow Laboratories
- University of Michigan
- Ann Arbor
- USA
| | - Jeff W. Kampf
- Department of Chemistry
- Willard H. Dow Laboratories
- University of Michigan
- Ann Arbor
- USA
| | - Vincent L. Pecoraro
- Department of Chemistry
- Willard H. Dow Laboratories
- University of Michigan
- Ann Arbor
- USA
| | - Talal Mallah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS
- Université Paris-Saclay
- 91405 Orsay Cedex
- France
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12
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Effect of Single-Ion Anisotropy on Magnetocaloric Properties of Frustrated Spin-s Ising Nanoclusters. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6040056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Effects of a single-ion anisotropy on magnetocaloric properties of selected spin-s≥1 antiferromagnetic Ising clusters with frustration-inducing triangular geometry are studied by exact enumeration. It is found that inclusion of the single-ion anisotropy parameter D can result in a much more complex ground-state behavior, which is also reflected in a magnetocaloric effect (MCE) at finite temperatures. For negative D (easy-plane anisotropy) with increasing s, the ground-state magnetization as a function of the external field gradually shows increasing number of plateaus of various heights. Except for the cases of integer s with D<D0≤0, the first magnetization plateau is of non-zero height. This property facilitates an enhanced MCE in the adiabatic demagnetization process in the form of an abrupt decrease in temperature as the magnetic field vanishes to zero. The cooling rate can be considerably enhanced in the systems with larger s and D>0 (easy-axis anisotropy), albeit its dependence on these parameters is strongly dependent on the cluster geometry. From the studied systems more favorable conditions for observing a giant MCE were found in the 2CS cluster, consisting of two corner-sharing tetrahedra, the experimental realization of which could be technologically used for efficient refrigeration to ultra-low temperatures.
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13
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Adhikary A, Das KS, Saha S, Roy M, Mondal R. A free-standing, self-healing multi-stimuli responsive gel showing cryogenic magnetic cooling. Dalton Trans 2020; 49:13487-13495. [PMID: 32966459 DOI: 10.1039/d0dt02356f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel Fe(iii)-based gel was synthesized via the self-assembly of Fe(iii) and pyridine 2,6 dicarboxylic acid. The synthesized gel has remarkable mechanical strength as well as self-sustainability. The metallogel also has thixotropic as well as self-healing properties. The metallogel shows amazing colourimetric NH3 sensing with unique gel-to-gel transformation. Magnetic studies on the as-synthesized gel reveal significant cryogenic magnetic cooling behavior. Last but not least, to the best of our knowledge, this would be the first case where MCE is investigated for any reported metallogel.
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Affiliation(s)
- Amit Adhikary
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata 700032, West Bengal, India.
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14
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Li NF, Han YM, Li JN, Cao JP, Du ZY, Xu Y. Two 3D Mn-based coordination polymers: synthesis, structure and magnetocaloric effect. RSC Adv 2020; 10:33628-33634. [PMID: 35519046 PMCID: PMC9056753 DOI: 10.1039/d0ra05926a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 08/24/2020] [Indexed: 11/21/2022] Open
Abstract
Two three-dimensional (3D) coordination polymers, namely MnII 6(CH3COO)2(HCOO)2(IN)8(C4H8O)2(H2O) and MnIII 6MnII 12(μ3-O)6(CH3COO)12(IN)18(H2O)7.5 (abbreviated as Mn II 6 and Mn II 12 Mn III 6 respectively; HIN = isonicotinic acid), were synthesized by the reaction of Mn(CH3COO)2·4H2O and isonicotinic acid under solvothermal conditions. Magnetic studies revealed that antiferromagnetic interactions may be present in compounds Mn II 6 and Mn II 12 Mn III 6 . Moreover, the values of -ΔS m (26.27 (Mn II 6 ) and 37.69 (Mn II 12 Mn III 6 ) J kg-1 K-1 at ΔH = 7 T) are relatively larger than those of the reported Mn-based coordination polymers. This work provides a great scope in the magnetocaloric effect (MCE) of pure 3d-type systems.
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Affiliation(s)
- Ning-Fang Li
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Ye-Min Han
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Jia-Nian Li
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Jia-Peng Cao
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Ze-Yu Du
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Yan Xu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 P. R. China
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15
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Magnetocaloric and barocaloric effects of metal complexes for solid state cooling: Review, trends and perspectives. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213357] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Principles for Creating “Molecular Refrigerators” Derived from Gadolinium(III) Coordination Compounds: A Review. THEOR EXP CHEM+ 2020. [DOI: 10.1007/s11237-020-09635-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Ahmed N, Tripathi S, Sarkar A, Ansari KU, Das C, Prajesh N, Horike S, Boomishankar R, Shanmugam M. Chiral tetranuclear copper( ii) complexes: synthesis, optical and magnetic properties. NEW J CHEM 2020. [DOI: 10.1039/d0nj02856h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The chiral tetranuclear Cu(ii) cubane complexes with the general molecular formula [Cu4(R-L1)4] (R-1) and [Cu4(S-L1)4] (S-1) exhibit ferromagnetic exchange coupling, which is in contrast to the literature reports. This is corroborated by theoretical calculations.
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Affiliation(s)
- Naushad Ahmed
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
| | - Shalini Tripathi
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
| | - Arup Sarkar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
| | - Kamal Uddin Ansari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
| | - Chinmoy Das
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Yoshida-Honmachi
- Kyoto 606-8501
- Japan
| | - Neetu Prajesh
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Pune, Dr Homi Bhabha Road
- Pune-411008
- India
| | - Satoshi Horike
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Yoshida-Honmachi
- Kyoto 606-8501
- Japan
| | - Ramamoorthy Boomishankar
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Pune, Dr Homi Bhabha Road
- Pune-411008
- India
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18
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Shiga T, Okawa N, Oshio H. A triple-triangle cluster derived from a simple tridentate ligand. Dalton Trans 2019; 48:17437-17440. [PMID: 31686072 DOI: 10.1039/c9dt03232k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The heptanuclear ferric cluster, [FeIII7(O)6(HL)5(H2L)(H2O)8](BF4)4 (H2L = 2,6-bis(1,5-diphenyl-1H-pyrazol-3-yl)pyridine), was synthesized by the reaction of the planar tridentate ligand H2L with iron(ii) tetrafluoroborate hexahydrate. The cluster has a corner-shared triple-triangle core structure connected by three μ-O atoms, and it has a spin-frustrated ferrimagnetic spin ground state of S = 19/2.
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Affiliation(s)
- Takuya Shiga
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan.
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19
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Loukopoulos E, Kostakis GE. Recent advances in the coordination chemistry of benzotriazole-based ligands. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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21
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Sánchez RH, Betley TA. Thermally Persistent High-Spin Ground States in Octahedral Iron Clusters. J Am Chem Soc 2018; 140:16792-16806. [PMID: 30403845 DOI: 10.1021/jacs.8b10181] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemical oxidation and reduction of the all-ferrous (HL)2Fe6 in THF affords isostructural, coordinatively unsaturated clusters of the type [(HL)2Fe6] n: [(HL)2Fe6][BArF24] (1, n = +1; where [BArF24]- = tetrakis[(3,5-trifluoromethyl)phenyl]borate), [Bu4N][(HL)2Fe6] (2a, n = -1), [P][(HL)2Fe6] (2b, n = -1; where [P]+ = tributyl(1,3-dioxolan-2-ylmethyl)phosphonium), and [Bu4N]2[(HL)2Fe6] (3, n = -2). Each member of the redox-transfer series was characterized by zero-field 57Fe Mössbauer spectroscopy, near-infrared spectroscopy, single-crystal X-ray crystallography, and magnetometry. Redox-directed trends are observed when comparing the structural metrics within the [Fe6] core. The metal octahedron [Fe6] decreases marginally in volume as the molecular reduction state increases as gauged by the Fe-Feavg distance varying from 2.608(11) Å ( n = +1) to 2.573(3) ( n = -2). In contrast, the mean Fe-N distances and ∠Fe-N-Fe angles correlate linearly with the [Fe6] oxidation level, or alternatively, the changes observed within the local Fe-N4 coordination planes vary linearly with the aggregate spin ground state. In general, as the spin ground state ( S) increases, the Fe-N(H)avg distances also increase. The structural metric perturbations within the [Fe6] core and measured spin ground states were rationalized extending the previously proposed molecular orbital diagram derived for (HL)2Fe6. Chemical reduction of the (HL)2Fe6 cluster results in an abrupt increase in spin ground state from S = 6 for the all-ferrous cluster, to S = 19/2 in the monoanionic 2b and S = 11 for the dianionic 3. The observation of asymmetric intervalence charge transfer bands in 3 provides further evidence of the fully delocalized ground state observed by 57Fe Mössbauer spectroscopy for all species examined (1-3). For each of the clusters examined within the electron-transfer series, the observed spin ground states thermally persist to 300 K. In particular, the S = 11 in dianionic 3 and S = 19/2 in the monoanionic 2b represent the highest spin ground states isolated up to room temperature known to date. The increase in spin ground state results from population of the antibonding orbital band comprised of the Fe-N σ* interactions. As such, the thermally persistent ground states arise from population of the resultant single spin manifolds in accordance with Hund's rules. The large spin ground states, indicative of strong ferromagnetic electronic alignment of the valence electrons, result from strong direct exchange electronic coupling mediated by Fe-Fe orbital overlap within the [Fe6] cores, equivalent to a strong double exchange magnetic coupling B for 3 that was calculated to be 309 cm-1.
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Affiliation(s)
- Raúl Hernández Sánchez
- Department of Chemistry and Chemical Biology , Harvard University , 12 Oxford Street , Cambridge , Massachusetts 02138 , United States
| | - Theodore A Betley
- Department of Chemistry and Chemical Biology , Harvard University , 12 Oxford Street , Cambridge , Massachusetts 02138 , United States
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22
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Wu JW, Wang X, Tian CB, Du SW. A new approach to fabricate the Mn(ii)-based magnetic refrigerant through incorporation of a diamagnetic {LiO 4} spacer. Dalton Trans 2018; 47:2143-2147. [PMID: 29372734 DOI: 10.1039/c7dt04820c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new 3D MOF [MnLi2(ip)2(H2O)2] (1) with a 1D heterometallic inorganic Mn(ii)-Li(i) chain is reported. With the assistance of diamagnetic {LiO4} connectors, which separate the paramagnetic Mn(ii) ions and act as magnetic spacers, very weak magnetic interactions were obtained. Remarkably, 1 showed a significant magnetocaloric effect (MCE) with a large entropy change value of 30.4 J kg-1 K-1 for ΔH = 8 T at 2 K.
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Affiliation(s)
- Jia-Wei Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou 350002, P. R. China.
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23
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Gajewska MJ, Bieńko A, Herchel R, Haukka M, Jerzykiewicz M, Ożarowski A, Drabent K, Hung CH. Iron(iii) bis(pyrazol-1-yl)acetate based decanuclear metallacycles: synthesis, structure, magnetic properties and DFT calculations. Dalton Trans 2018; 45:15089-15096. [PMID: 27722574 DOI: 10.1039/c6dt02333a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structural aspects, magnetic interpretation and theoretical rationalizations for a new member of the ferric wheel family, a decanuclear iron(iii) complex with the formula [Fe10(bdtbpza)10(μ2-OCH3)20] (1), featuring the N,N,O tridentate bis(3,5-di-tert-butylpyrazol-1-yl)acetate ligand, are reported. The influence of the steric effect on both the core geometry and coordination mode is observed. Temperature dependent (2.0-300 K range) magnetic susceptibility studies carried out on complexes 1 established unequivocally antiferromagnetic (AF) interactions between high-spin iron(iii) centers (S = 5/2), leading to a ground state S = 0. The mechanism of AF intramolecular coupling was proved using a broken-symmetry approach within the density functional method at the B3LYP/def2-TZVP(-f)/def2-SVP level of theory.
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Affiliation(s)
| | - Alina Bieńko
- Faculty of Chemistry, Wrocław University, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Matti Haukka
- Department of Chemistry, FI-40014 University of Jyväskylä, Finland
| | - Maria Jerzykiewicz
- Faculty of Chemistry, Wrocław University, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Andrzej Ożarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Krzysztof Drabent
- Faculty of Chemistry, Wrocław University, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Chen-Hsiung Hung
- Institute of Chemistry, Academia Sinica, Nankang, Taipei 105, Taiwan.
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24
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Gui D, Dai X, Zheng T, Wang X, Silver MA, Chen L, Zhang C, Diwu J, Zhou R, Chai Z, Wang S. An Ultrastable Heterobimetallic Uranium(IV)/Vanadium(III) Solid Compound Protected by a Redox-Active Phosphite Ligand: Crystal Structure, Oxidative Dissolution, and First-Principles Simulation. Inorg Chem 2018; 57:903-907. [PMID: 29320167 DOI: 10.1021/acs.inorgchem.7b02623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first heterobimetallic uranium(IV)/vanadium(III) phosphite compound, Na2UV2(HPO3)6 (denoted as UVP), was synthesized via an in situ redox-active hydrothermal reaction. It exhibits superior hydrolytic and antioxidant stability compared to the majority of structures containing low-valent uranium or vanadium, further elucidated by first-principles simulations, and therefore shows potential applications in nuclear waste management.
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Affiliation(s)
- Daxiang Gui
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Xing Dai
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Tao Zheng
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Xiangxiang Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Mark A Silver
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Lanhua Chen
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Chao Zhang
- School of Materials Science and Engineering, Anhui University of Science and Technology , Huainan 232001, P. R. China
| | - Juan Diwu
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Ruhong Zhou
- Computational Biology Center, IBM Thomas J. Watson Research Center , Yorktown Heights, New York 10598, United States.,Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Zhifang Chai
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
| | - Shuao Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Jiangsu 215123, China
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25
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Meng T, Wang JS, Zou HH, Liang FH, Liang FP. Synthesis, crystal structure, and properties of a tetrairon cluster based on 2-methyl-8-hydroxyquinoline. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1433296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ting Meng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Jia-Shun Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Hua-Hong Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Feng-Hua Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
| | - Fu-Pei Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, P. R. China
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26
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Gao HL, Huang SX, Zhou XP, Liu Z, Cui JZ. Magnetic properties and structure of tetranuclear lanthanide complexes based on 8-hydroxylquinoline Schiff base derivative and β-diketone coligand. Dalton Trans 2018; 47:3503-3511. [DOI: 10.1039/c8dt00063h] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the synthesis, structure, and magnetism of five tetranuclear LnIII complexes encapsulated by 5-(4-pyridinecarboxaldehyde)amino-8-hydroxylquinoline and β-diketonate coligand.
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Affiliation(s)
- Hong-Ling Gao
- Department of Chemistry
- Tianjin University
- Tianjin 300354
- P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
| | - Shao-Xia Huang
- Department of Chemistry
- Tianjin University
- Tianjin 300354
- P. R. China
| | - Xiao-Pu Zhou
- Kaifeng Agricultural Products Quality and Safety Inspection Center
- P. R. China
| | - Zhen Liu
- Department of Chemistry
- Tianjin University
- Tianjin 300354
- P. R. China
| | - Jian-Zhong Cui
- Department of Chemistry
- Tianjin University
- Tianjin 300354
- P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
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27
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Stuber MA, Kornienko AY, Emge TJ, Brennan JG. Tetrametallic Thorium Compounds with Th 4E 4 (E = S, Se) Cubane Cores. Inorg Chem 2017; 56:10247-10256. [PMID: 28832125 DOI: 10.1021/acs.inorgchem.7b00950] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tetrametallic thorium compounds with a Th4E4 core (E = S, Se) having a distorted cubane structure can be prepared by ligand-based reductions of elemental E with thorium chalcogenolates, prepared by in situ oxidation of Th metal with a 3:1 mixture of PhEEPh and F5C6EEC6F5. Four compounds, (py)8Th4S4(μ2-SPh)4(SC6F5)4, (py)8Th4S4(μ2-SPh)4(SeC6F5)4, (py)8Th4Se4(μ2-SePh)4(SeC6F5)4, and (py)8Th4Se4(μ2-SePh)4(SC6F5)4, were isolated and characterized by NMR spectroscopy and X-ray diffraction. These compounds clearly demonstrate the chemical impact of ring fluorination, with the less-nucleophilic EC6F5 ligands occupying the terminal binding sites and the EPh ligands bridging two metal centers. For this series of compounds, crystal packing and intermolecular π···π and H-bonding interactions result in a consistent motif and crystallization in a body-centered tetragonal unit cell. Solution-state 77Se NMR spectroscopy reveals that the solid-state structures are maintained in pyridine.
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Affiliation(s)
- Matthew A Stuber
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Anna Y Kornienko
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Thomas J Emge
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - John G Brennan
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
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28
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Kitos AA, Papatriantafyllopoulou C, Tasiopoulos AJ, Perlepes SP, Escuer A, Nastopoulos V. Binding of ligands containing carbonyl and phenol groups to iron(iii): new Fe 6, Fe 10 and Fe 12 coordination clusters. Dalton Trans 2017; 46:3240-3251. [PMID: 28224156 DOI: 10.1039/c6dt04830g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The initial use of ligands 2'-hydroxyacetophenone (HL1), 2-hydroxybenzophenone (HL2) and 2,2'-dihydroxybenzophenone (H2L3) in iron(iii) chemistry is described. The syntheses and crystal structures are reported for five iron(iii) clusters: [Fe10O4(OMe)14(L1)6(MeOH)2](NO3)2·3MeOH (1·3MeOH), [Fe12O4(OH)(OMe)17(L1)8](ClO4)2·2H2O (2·2H2O), [Fe10O4(OMe)14Cl4(L2)4(MeOH)2] (3), [Fe10O4(OMe)14(L2)6(py)2](ClO4)2·MeOH (4·MeOH), where py = pyridine, and [Fe6O2(OEt)6(O2CMe)2(L3)2(HL3)2] (5). The molecular structures of the decanuclear clusters 1, 3 and 4 are organized around a {Fe10(μ4-O)4(μ3-OMe)2(μ-OMe)12}8+ core consisting of ten {Fe3O4} face-sharing defective cubane units. The core of 2 consists of a {Fe12(μ4-O)4(μ3-OMe)4(μ-OH)(μ-OMe)13}10+ unit composed of twelve {Fe3O4} face-sharing defective cubanes. The ligands (L1)- and (L2)- in 1-4 adopt the O,O'-bidentate chelating coordination mode and their roles are to terminate the further aggregation of the FeIII/O2-/RO- cores. Complex 5 contains the {Fe6(μ4-O)2(μ-OEt)6(μ-Ocarbonyl)2}4+ core, where the μ-Ocarbonyl atoms are the bridging carbonyl oxygens of the two η1:η2:η1:μ (L3)2- ligands; the (HL3)- groups behave as Ophenolate, Ocarbonyl-bidentate chelating ligands with the neutral hydroxyl group being unbound to the FeIII atoms. The core is composed of four {Fe3O4} face-sharing defective cubanes. The FeIII atoms in 1-5 are all six-coordinate with distorted octahedral geometries. The IR spectra of the complexes are discussed in terms of the known coordination modes of the ligands and the ionic character of nitrates and perchlorates. Variable-temperature magnetic susceptibility and variable-field magnetization measurements establish that 2, 3 and 5 have S = 3, 0 and 5 ground states, respectively. The susceptibility data for 5 were fitted using a 3-J model indicating the simultaneous presence of both antiferromagnetic and ferromagnetic FeIIIFeIII exchange interactions. Known magnetostructural correlations in oxido-bridged iron(iii) systems have been applied to rationalise the magnetic behaviour of the three clusters. The results of the present study demonstrate the utility of HL1, HL2 and H2L3 in the stabilisation of robust iron(iii)/oxido/alkoxido clusters.
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Affiliation(s)
| | - Constantina Papatriantafyllopoulou
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus and School of Chemistry, National University of Ireland Galway, Galway, Ireland
| | | | - Spyros P Perlepes
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Albert Escuer
- Departament de Quimica Inorgànica i Orgànica, Seccio Inorgànica and Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
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29
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Fraser HWL, Nichol GS, Velmurugan G, Rajaraman G, Brechin EK. Magneto-structural correlations in a family of di-alkoxo bridged chromium dimers. Dalton Trans 2017; 46:7159-7168. [DOI: 10.1039/c7dt01197k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A series of di-alkoxo bridged Cr(iii) dimers have been synthesised using pyridine alcohol ligands.
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Affiliation(s)
| | - Gary S. Nichol
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
| | | | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Euan K. Brechin
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
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30
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Hooper TN, Langley SK, Gómez-Coca S, Lorusso G, Ruiz E, Murray KS, Evangelisti M, Brechin EK. Coming full circle: constructing a [Gd6] wheel dimer by dimer and the importance of spin topology. Dalton Trans 2017; 46:10255-10263. [DOI: 10.1039/c7dt02281f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conversion of dimer → linear tetramer → cyclic hexamer reveals remarkable topological size effects.
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Affiliation(s)
- Thomas N. Hooper
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
| | | | - Silvia Gómez-Coca
- Departament de Química Inorgànica I Orgànica and Institut de Recerca de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Giulia Lorusso
- Instituto de Ciencia de Materiales de Aragón
- CSIC-Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica I Orgànica and Institut de Recerca de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | | | - Marco Evangelisti
- Instituto de Ciencia de Materiales de Aragón
- CSIC-Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Euan K. Brechin
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
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31
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Chow CY, Guillot R, Rivière E, Kampf JW, Mallah T, Pecoraro VL. Synthesis and Magnetic Characterization of Fe(III)-Based 9-Metallacrown-3 Complexes Which Exhibit Magnetorefrigerant Properties. Inorg Chem 2016; 55:10238-10247. [DOI: 10.1021/acs.inorgchem.6b01404] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Chun Y. Chow
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Régis Guillot
- Institut de Chemie Moléculaire et
des Matériaux d’Orsay, CNRS, Université de Paris Sud 11, 91405 Orsay Cedex, France
| | - Eric Rivière
- Institut de Chemie Moléculaire et
des Matériaux d’Orsay, CNRS, Université de Paris Sud 11, 91405 Orsay Cedex, France
| | - Jeff W. Kampf
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Talal Mallah
- Institut de Chemie Moléculaire et
des Matériaux d’Orsay, CNRS, Université de Paris Sud 11, 91405 Orsay Cedex, France
| | - Vincent L. Pecoraro
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
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32
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Hooper TN, Inglis R, Lorusso G, Ujma J, Barran PE, Uhrin D, Schnack J, Piligkos S, Evangelisti M, Brechin EK. Structurally Flexible and Solution Stable [Ln4TM8(OH)8(L)8(O2CR)8(MeOH)y](ClO4)4: A Playground for Magnetic Refrigeration. Inorg Chem 2016; 55:10535-10546. [DOI: 10.1021/acs.inorgchem.6b01730] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas N. Hooper
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Ross Inglis
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Giulia Lorusso
- Instituto
de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jakub Ujma
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Perdita E. Barran
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Dusan Uhrin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Jürgen Schnack
- Universität Bielefeld, Fakultät
für Physik, Postfach
100131, 33501 Bielefeld, Germany
| | - Stergios Piligkos
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Marco Evangelisti
- Instituto
de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Euan K. Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, U.K
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33
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A Ni11 Coordination Cluster from the Use of the Di-2-Pyridyl Ketone/Acetate Ligand Combination: Synthetic, Structural and Magnetic Studies. MAGNETOCHEMISTRY 2016. [DOI: 10.3390/magnetochemistry2030030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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Xiong G, You LX, Ren BY, He YK, Wang SJ, Sun YG. Structure and Magnetocaloric Effect of Two Kinds of Ln-MnIIHeterometallic Coordination Polymers Produced by Fractional Crystallization. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600302] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gang Xiong
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
| | - Li-xin You
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
| | - Bao-yi Ren
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
| | - Yong-ke He
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
| | - Shu-ju Wang
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
| | - Ya-guang Sun
- Laboratory of Inorganic Molecule-Based Chemical of LiaoNing Province, and; Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; 100142 Shenyang P. R. China
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35
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Zhang S, Cheng P. Coordination-Cluster-Based Molecular Magnetic Refrigerants. CHEM REC 2016; 16:2077-126. [PMID: 27381662 DOI: 10.1002/tcr.201600038] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Indexed: 02/03/2023]
Abstract
Coordination polymers serving as molecular magnetic refrigerants have been attracting great interest. In particular, coordination cluster compounds that demonstrate their apparent advantages on cryogenic magnetic refrigerants have attracted more attention in the last five years. Herein, we mainly focus on depicting aspects of syntheses, structures, and magnetothermal properties of coordination clusters that serve as magnetic refrigerants on account of the magnetocaloric effect. The documented molecular magnetic refrigerants are classified into two primary categories according to the types of metal centers, namely, homo- and heterometallic clusters. Every section is further divided into several subgroups based on the metal nuclearity and their dimensionalities, including discrete molecular clusters and those with extended structures constructed from molecular clusters. The objective is to present a rough overview of recent progress in coordination-cluster-based molecular magnetic refrigerants and provide a tutorial for researchers who are interested in the field.
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Affiliation(s)
- Shaowei Zhang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of the Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, P.R. China.,Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University, Tianjin, 300071, P.R. China
| | - Peng Cheng
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University, Tianjin, 300071, P.R. China.,Collaborative Innovation Center of Chemical Science and Engineering Nankai University, Tianjin, 300071, P.R. China
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36
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Golla U, Adhikary A, Mondal AK, Tomar RS, Konar S. Synthesis, structure, magnetic and biological activity studies of bis-hydrazone derived Cu(ii) and Co(ii) coordination compounds. Dalton Trans 2016; 45:11849-63. [PMID: 27377047 DOI: 10.1039/c6dt01496h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Four coordination compounds of formulae [Cu(II)2(H2L(1))(HL(1))](ClO4)3·H2O (1), [Cu(II)2(H2L(2))(CH3OH)2](ClO4)2·2CH3OH (2), [Co(II)2(H2L(1))2](ClO4)4 (3) and [Co(II)2(H2L(2))2]·2H2O (4) were synthesized via self-assembly of succinohydrazone derived ligands (H2L(1) = N',N'-4-bis(2-pyridyl)succinohydrazide, H4L(2) = N',N'-4-bis(2-hydroxybenzylidene)succinohydrazide) and Cu(2+) and Co(2+) ions, respectively. The compounds were characterized by crystal structure determination, magnetic measurements and biological activities. Compounds 1, 3 and 4 have discrete double helicate structures, whereas compound 2 is a one-dimensional chain. Magnetic studies show antiferromagnetic exchange interactions in 2 with a J value of -67.1 cm(-1) and antiferromagnetic spin-canting in compound 3 originates through supramolecular H-bonding. For compound 3, a clear bifurcation was observed in zero field cooled (ZFC) and field cooled (FC) measurement at a temperature of 3.5 K and field of 0.1 T, implying long range magnetic ordering below this temperature. Interestingly, all of compounds 1-4 show significant changes in their absorption (hypo- and hyperchromism) in the presence of SS-DNA, inferring interaction between the compounds and DNA. In addition, compounds 1-4 significantly exhibited nuclease activities on both RNA and pUC19 plasmid DNA. Moreover, the nuclease activity was further enhanced in the presence of oxidant (H2O2) and suggests the possible role of reactive oxygen species in DNA nicking ability of compounds 1-4. Furthermore, compounds 1, 2 and 4 exhibited significant cytotoxicity against mammalian cancer cell lines (HeLa, A549 and MDAMB-231). In addition, our results from Annexin/PI staining and DNA fragmentation assays revealed that these compounds are capable of inducing apoptosis and have potential to act as anticancer drugs.
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37
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Tzani S, Lazarou KN, Stoumpos CC, Pissas M, Psycharis V, Sanakis Y, Raptopoulou CP. Iron(III) complexes with 2-pyridyl oxime ligands: Synthesis, structural and spectroscopic characterization, and magnetic studies. ChemistrySelect 2016. [DOI: 10.1002/slct.201600037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sofia Tzani
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Katerina N. Lazarou
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | | | - Michael Pissas
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Vassilis Psycharis
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Yiannis Sanakis
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
| | - Catherine P. Raptopoulou
- Institute of Nanoscience and Nanotechnology; NCSR “Demokritos”; 15310 Aghia Paraskevi, Athens Greece, Tel: +30 210 6503346, Fax: +30 210 6519430
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38
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Werner TW, Reschke S, Bunzen H, von Nidda HAK, Deisenhofer J, Loidl A, Volkmer D. [Co5Tp*4(Me2bta)6]: A Highly Symmetrical Pentanuclear Kuratowski Complex Featuring Tris(pyrazolyl)borate and Benzotriazolate Ligands. Inorg Chem 2016; 55:1053-60. [DOI: 10.1021/acs.inorgchem.5b01982] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tamas W. Werner
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Stephan Reschke
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Hana Bunzen
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
| | - Hans-Albrecht Krug von Nidda
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Joachim Deisenhofer
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Alois Loidl
- Experimental Physics V, Center for Electronic Correlations
and Magnetism, Institute of Physics, University of Augsburg, Universitaetsstrasse
1, D-86159 Augsburg, Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry,
Institute of Physics, University of Augsburg, Universitaetsstrasse 1, D-86159 Augsburg, Germany
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39
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Houton E, Comar P, Pitak MB, Coles SJ, Ryder AG, Piligkos S, Brechin EK, Jones LF. Solvothermal synthesis of discrete cages and extended networks comprising {Cr(iii)3O(O2CR)3(oxime)3}2− (R = H, CH3, C(CH3)3, C14H9) building blocks. RSC Adv 2016. [DOI: 10.1039/c6ra14811e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
We present the solvothermal synthesis, structural and magnetic characterisation of a family of Cr(iii) cages and extended networks comprising {Cr(iii)3O(O2CR1)3(R2-sao)}2− (R1 = H, CH3, C(CH3)3, C14H9; R2 = Me, Ph, tBu, C10H6) building blocks.
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Affiliation(s)
| | - Priyanka Comar
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
| | - Mateusz B. Pitak
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- UK
| | - Simon J. Coles
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- UK
| | | | - Stergios Piligkos
- Department of Chemistry
- University of Copenhagen
- Universitetsparken 5
- Denmark
| | - Euan K. Brechin
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh
- UK
| | - Leigh F. Jones
- School of Chemistry
- Bangor University
- Bangor
- UK
- School of Chemistry
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40
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Wang SY, Wang WM, Zhang HX, Shen HY, Jiang L, Cui JZ, Gao HL. Seven phenoxido-bridged complexes encapsulated by 8-hydroxyquinoline Schiff base derivatives and β-diketone ligands: single-molecule magnet, magnetic refrigeration and luminescence properties. Dalton Trans 2016; 45:3362-71. [DOI: 10.1039/c5dt04391c] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Seven dinuclear complexes based on 8-hydroxyquinoline Schiff base derivatives and β-diketone ligands have been synthesized, and structurally and magnetically characterized.
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Affiliation(s)
- Shi-Yu Wang
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Wen-Min Wang
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Hong-Xia Zhang
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Hai-Yun Shen
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Li Jiang
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Jian-Zhong Cui
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Hong-Ling Gao
- Department of Chemistry
- Tianjin University
- Tianjin 300072
- P. R. China
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41
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42
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Abstract
The field of single molecule magnetism remains predicated on super- and double exchange mechanisms to engender large spin ground states. An alternative approach to achieving high-spin architectures involves synthesizing weak-field clusters featuring close M-M interactions to produce a single valence orbital manifold. Population of this orbital manifold in accordance with Hund's rules could potentially yield thermally persistent high-spin ground states under which the valence electrons remain coupled. We now demonstrate this effect with a reduced hexanuclear iron cluster that achieves an S = 19/2 (χ(M)T ≈ 53 cm(3) K/mol) ground state that persists to 300 K, representing the largest spin ground state persistent to room temperature reported to date. The reduced cluster displays single molecule magnet behavior manifest in both variable-temperature zero-field (57)Fe Mössbauer and magnetometry with a spin reversal barrier of 42.5(8) cm(-1) and a magnetic blocking temperature of 2.9 K (0.059 K/min).
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Affiliation(s)
- Rauĺ Hernández Sánchez
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Theodore A. Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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43
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Wang WM, Zhang HX, Wang SY, Shen HY, Gao HL, Cui JZ, Zhao B. Ligand Field Affected Single-Molecule Magnet Behavior of Lanthanide(III) Dinuclear Complexes with an 8-Hydroxyquinoline Schiff Base Derivative as Bridging Ligand. Inorg Chem 2015; 54:10610-22. [DOI: 10.1021/acs.inorgchem.5b01404] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Wen-Min Wang
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Hong-Xia Zhang
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Shi-Yu Wang
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Hai-Yun Shen
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Hong-Ling Gao
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Jian-Zhong Cui
- Department of Chemistry, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Bin Zhao
- College of Chemistry, Key Laboratory of
Advanced Energy Material Chemistry, MOE, TKL of Metal and Molecule
Based Material Chemistry, and Collaborative Innovation Center of Chemical
Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
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44
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Chen H, Zhao H, Yu ZB, Wang L, Sun L, Sun J. Construct Polyoxometalate Frameworks through Covalent Bonds. Inorg Chem 2015; 54:8699-704. [DOI: 10.1021/acs.inorgchem.5b01326] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Chen
- Berzelii Centre EXSELENT on Porous Materials, Department
of Materials and Environmental Chemistry, Stockholm University, SE-106
91 Stockholm, Sweden
- Faculty of Material Science and Chemistry, China University of Geosciences, 430074 Wuhan, China
| | - Huishuang Zhao
- Berzelii Centre EXSELENT on Porous Materials, Department
of Materials and Environmental Chemistry, Stockholm University, SE-106
91 Stockholm, Sweden
- Faculty of Pharmaceutical and Environment
Technology, Changzhou Institute of Engineering Technology, 213164 Changzhou, China
| | - Zheng-Bao Yu
- College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Lei Wang
- Organic Chemistry, Center of Molecular
Devices, School of Chemical Science and Engineering, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Licheng Sun
- Organic Chemistry, Center of Molecular
Devices, School of Chemical Science and Engineering, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Junliang Sun
- Berzelii Centre EXSELENT on Porous Materials, Department
of Materials and Environmental Chemistry, Stockholm University, SE-106
91 Stockholm, Sweden
- College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
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45
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Sethi W, Sanz S, Pedersen KS, Sørensen MA, Nichol GS, Lorusso G, Evangelisti M, Brechin EK, Piligkos S. Magnetic and magnetocaloric properties of an unusual family of carbonate-panelled [Ln(III)(6)Zn(III)(2)] cages. Dalton Trans 2015; 44:10315-20. [PMID: 25967745 DOI: 10.1039/c5dt01240f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of the pro-ligand H4L, which combines the complementary phenolic oxime and diethanolamine moieties within the same organic framework, with Zn(NO3)2·6H2O and Ln(NO3)3·6H2O in a basic methanolic solution generates a family of isostructural heterometallic coordination compounds of general formula [Ln6Zn2(CO3)5(OH)(H2L)4(H3L)2(H4L)]NO3·xMeOH [Ln = Gd, x = 30 (), Ln = Dy, x = 32 (), Ln = Sm, x = 31 (), Ln = Eu, x = 29 (), Ln = Tb, x = 30 ()]. The octametallic skeleton of the cage describes a heavily distorted [Gd] octahedron capped on two faces by Zn(II) ions. The metal core is stabilised by a series of μ3- and μ4-CO3(2-) ions, originating from the serendipitous fixation of atmospheric CO2. The magnetic properties of all family members were examined via SQUID magnetometry, with the χMT product and VTVB data of the Gd analogue () being independently fitted by numerical diagonalisation to afford the same best-fit parameter JGd-Gd = -0.004 cm(-1). The MCE of complex was elucidated from specific heat data, with the magnetic entropy change reaching a value of 22.6 J kg(-1) K(-1) at T = 1.7 K, close to the maximum entropy value per mole expected from six Gd(III) spins (SGd = 7/2), 23.7 J kg(-1) K(-1).
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Affiliation(s)
- Waqas Sethi
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Denmark.
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46
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Rajeshkumar T, Annadata HV, Evangelisti M, Langley SK, Chilton NF, Murray KS, Rajaraman G. Theoretical Studies on Polynuclear {CuII5GdIIIn} Clusters (n = 4, 2): Towards Understanding Their Large Magnetocaloric Effect. Inorg Chem 2015; 54:1661-70. [DOI: 10.1021/ic502651w] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Thayalan Rajeshkumar
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumabi 400076, India
| | - Harshini V. Annadata
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumabi 400076, India
| | - Marco Evangelisti
- Instituto de Ciencia
de Materiales de Aragón and Departamento de Física de
la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Stuart K. Langley
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Nicholas F. Chilton
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Keith S. Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Gopalan Rajaraman
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumabi 400076, India
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47
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Ahmed N, Upadhyay A, Rajeshkumar T, Vaidya S, Schnack J, Rajaraman G, Shanmugam M. Carboxylate free μ-oxo bridged ferric wheel with a record exchange coupling. Dalton Trans 2015; 44:18743-7. [DOI: 10.1039/c5dt02695d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An oxo-bridged, carboxylate free ‘ferric wheel’ was isolated with the molecular formula [FeIII8(μ-O)4(L2−)8] (1). The strength of antiferromagnetic interaction between the Fe(iii) ions is revealed by magnetic simulation (J1 = −26.4 and J2 = −170 cm−1). The exchange value of −170 cm−1 is the largest exchange value known for any homometallic or heterometallic wheels reported to date.
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Affiliation(s)
- Naushad Ahmed
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India-400076
| | - Apoorva Upadhyay
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India-400076
| | | | - Shefali Vaidya
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India-400076
| | - Jürgen Schnack
- Faculty of Physics
- Bielefeld University
- D-33501 Bielefeld
- Germany
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India-400076
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48
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Gupta SK, Dar AA, Rajeshkumar T, Kuppuswamy S, Langley SK, Murray KS, Rajaraman G, Murugavel R. Discrete {GdIII4M} (M = GdIII or CoII) pentanuclear complexes: a new class of metal-organophosphate molecular coolers. Dalton Trans 2015; 44:5961-5. [DOI: 10.1039/c4dt03655g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A higher magnetic entropy change is observed for the homometallic {GdIII5} complex (25.8 J kg−1 K−1) as compared to the heterometallic {GdIII4CoII} complex (20.3 J kg−1 K−1).
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Affiliation(s)
- Sandeep K. Gupta
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Aijaz A. Dar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | | | | | | | | | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
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49
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Zhang YY, Zhao H, Yang EC, Liu ZY, Shang Q, Zhao XJ. Triazolate-based 3D frameworks and a 2D layer with centrosymmetric CuII7, CuII5, CuII4 clusters and tunable interlayer/interchain compactness: hydrothermal syntheses, crystal structures and magnetic properties. Dalton Trans 2015; 44:5826-36. [DOI: 10.1039/c4dt04013a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 2D layer and three 3D frameworks with different interchain/interlayer compactness and spin ground-states were reported.
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Affiliation(s)
- Yuan-Yuan Zhang
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
| | - Hong Zhao
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
| | - En-Cui Yang
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
| | - Zhong-Yi Liu
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
| | - Qiu Shang
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
| | - Xiao-Jun Zhao
- College of Chemistry
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- Tianjin Normal University
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50
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Adhikary A, Jena HS, Konar S. A family of Fe3+ based double-stranded helicates showing a magnetocaloric effect, and Rhodamine B dye and DNA binding activities. Dalton Trans 2015; 44:15531-43. [DOI: 10.1039/c5dt01569c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A series of Fe3+ based double-stranded helicates unveil a significant magnetocaloric effect as well as binding activities with Rhodamine B dye and CT-DNA.
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Affiliation(s)
- Amit Adhikary
- Department of Chemistry
- IISER Bhopal
- Bhopal 462066
- India
| | | | - Sanjit Konar
- Department of Chemistry
- IISER Bhopal
- Bhopal 462066
- India
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