1
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Gharu A, Vignesh KR. Theoretical exploration of single-molecule magnetic and single-molecule toroic behaviors in peroxide-bridged double-triangular {MII3LnIII3} (M = Ni, Cu and Zn; Ln = Gd, Tb and Dy) complexes. Dalton Trans 2024. [PMID: 39087311 DOI: 10.1039/d4dt01800a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Detailed state-of-the-art ab initio and density functional theory (DFT) calculations have been undertaken to understand both Single-Molecule Magnetic (SMM) and Single-Molecule Toroic (SMT) behaviors of fascinating 3d-4f {M3Ln3} triangular complexes having the molecular formula [MII3LnIII3(O2)L3(PyCO2)3](OH)2(ClO4)2·8H2O (with M = Zn; Ln = Dy (1), Tb (2) & Gd (3) and M = Cu; Ln = Dy (4), Tb (5) & Gd (6)) and [Ni3Ln3(H2O)3(mpko)9(O2)(NO3)3](ClO4)·3CH3OH·3CH3CN (Ln = Dy (7), Tb (8), and Gd (9)) [mpkoH = 1-(pyrazin-2-yl)ethanone oxime]. All these complexes possess a peroxide ligand that bridges the {LnIII3} triangle in a μ3-η3:η3 fashion and the oxygen atoms/oxime of co-ligands that connect each MII ion to the {LnIII3} triangle. Through our computational studies, we tried to find the key role of the peroxide bridge and how it affects the SMM and SMT behavior of these complexes. Primarily, ab initio Complete Active Space Self-Consistent Field (CASSCF) SINGLE_ANISO + RASSI-SO + POLY_ANISO calculations were performed on 1, 2, 4, 5, 7, and 8 to study the anisotropic behavior of each Ln(III) ion, to derive the magnetic relaxation mechanism and to calculate the LnIII-LnIII and CuII/NiII-LnIII magnetic coupling constants. DFT calculations were also performed to validate these exchange interactions (J) by computing the GdIII-GdIII and CuII/NiII-GdIII interactions in 3, 6, and 9. Our calculations explained the experimental magnetic relaxation processes and the magnetic exchange interactions for all the complexes, which also strongly imply that the peroxide bridge plays a role in the SMM behavior observed in these systems. On the other hand, this peroxide bridge does not support the SMT behavior. To investigate the effect of bridging ions in {M3Ln3} systems, we modeled a {ZnII3DyIII3} complex (1a) with a hydroxide ion replacing the bridged peroxide ion in complex 1 and considered a hydroxide-bridged {CoIII3DyIII3} complex (10) having the formula [Co3Dy3(OH)4(OOCCMe3)6(teaH)3(H2O)3](NO3)2·H2O. We discovered that as compared to the LoProp charges of the peroxide ion, the greater negative charges on the bridging hydroxide ion reduce quantum tunneling of magnetization (QTM) effects, enabling more desirable SMM characteristics and also leading to good SMT behavior.
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Affiliation(s)
- Amit Gharu
- Department of Chemical Sciences, IISER Mohali, Sector-81, Knowledge city, S.A.S. Nagar, Mohali-140306, Punjab, India.
| | - Kuduva R Vignesh
- Department of Chemical Sciences, IISER Mohali, Sector-81, Knowledge city, S.A.S. Nagar, Mohali-140306, Punjab, India.
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2
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Chantarangkul C, Patigo A, McMurtrie JC, Clérac R, Rouzières M, Gómez-Coca S, Ruiz E, Harding P, Harding DJ. Thermal Jahn-Teller Distortion Changes and Slow Relaxation of Magnetization in Mn(III) Schiff Base Complexes. Inorg Chem 2024; 63:12858-12869. [PMID: 38934463 PMCID: PMC11256760 DOI: 10.1021/acs.inorgchem.4c01317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 06/06/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024]
Abstract
The impact that the anion and alkyl group has on the electronic structures and magnetic properties of four mononuclear Mn(III) complexes is explored in [Mn(salEen-Br)2]Y (salEen-Br = 2-{[2-(ethylamino)ethylimino]methyl}-4-Br-phenol; Y = ClO4- 1 and BF4-·1/3CH2Cl2 2) and [Mn(salBzen-Br)2]Y (salBzen-Br = 2-{[2-(benzylamino)ethylimino]methyl}-4-Br-phenol; Y = ClO4- 3 and BF4- 4). X-ray structures of [Mn(salEen-Br)2]ClO4·0.45C6H14 1-hexane, [Mn(salEen-Br)2]BF4·0.33CH2Cl2·0.15C6H14 2-dcm-hexane, and 3-4 reveal that they crystallize in ambient conditions in the monoclinic P21/c space group. Lowering the temperature, 2-dcm-hexane uniquely exhibits a structural phase transition toward a monoclinic P21/n crystal structure determined at 100 K with the unit cell trebling in size. Remarkably, at room temperature, the axially elongated Jahn-Teller axis in 2-dcm-hexane is poorly defined but becomes clearer at low temperature after the phase transition. Magnetic susceptibility measurements of 1-4 reveal that only 3 and 4 show slow relaxation of magnetization with Δeff/kB = 27.9 and 20.7 K, implying that the benzyl group is important for observing single-molecule magnet (SMM) properties. Theoretical calculations demonstrate that the alkyl group subtly influences the orbital levels and therefore very likely the observed SMM properties.
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Affiliation(s)
- Chantalaksana Chantarangkul
- Functional
Materials and Nanotechnology Centre of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| | - Apinya Patigo
- Functional
Materials and Nanotechnology Centre of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| | - John C. McMurtrie
- Queensland
University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Rodolphe Clérac
- University
of Bordeaux, CNRS, CRPP, UMR 5031, F-33600 Pessac, France
| | - Mathieu Rouzières
- University
of Bordeaux, CNRS, CRPP, UMR 5031, F-33600 Pessac, France
| | - Silvia Gómez-Coca
- Departament
de Química Inorgànica i Orgànica, Institut de
Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament
de Química Inorgànica i Orgànica, Institut de
Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Phimphaka Harding
- School
of Chemistry, Institute of Science, Suranaree
University of Technology, Nakhon
Ratchasima 30000, Thailand
| | - David J. Harding
- School
of Chemistry, Institute of Science, Suranaree
University of Technology, Nakhon
Ratchasima 30000, Thailand
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Pham L, Cao TS, Abboud KA, Christou G. New family of Ln9Mn4 (Ln = Gd, Tb, Dy) and Y9Mn4 clusters from the use of methyl-2-pyridyl-ketone oxime in heterometallic Mn chemistry. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Bhanja A, Smythe L, Kotrle K, Ortu F, Herchel R, Murrie M, Ray D. Synthesis of heptanuclear Ni4Dy3 coordination aggregate using tridentate ligand: X-ray structure, magnetism and theoretical studies. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Basak D, Smythe L, Herchel R, Murrie M, Nemec I, Ray D. From tetranuclear to pentanuclear [Co-Ln] (Ln = Gd, Tb, Dy, Ho) complexes across the lanthanide series: effect of varying sequence of ligand addition. Dalton Trans 2021; 50:11861-11877. [PMID: 34369499 DOI: 10.1039/d1dt02038b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Two new families of cobalt(ii/iii)-lanthanide(iii) coordination aggregates have been reported: tetranuclear [LnCoL2(N-BuDEA)2(O2CCMe3)4(H2O)2]·(MeOH)n·(H2O)m (Ln = Gd, 1; Tb, 2; Dy, 3; n = 2, m = 10 for 1 and 2; n = 6, m = 2 for 3) and pentanuclear LnCoIICoL2(N-BuDEA)2(O2CCMe3)6(MeOH)2 (Ln = Dy, 4; Ho, 5) formed from the reaction of two aggregation assisting ligands H2L (o-vanillin oxime) and N-BuDEAH2 (N-butyldiethanolamine). A change in preference from a lower to higher nuclearity structure was observed on going across the lanthanide series brought about by the variation in the size of the LnIII ions. An interesting observation was made for the varying sequence of addition of the ligands into the reaction medium paving the way to access both structural types for Ln = Dy. HRMS (+ve) of solutions gave further insight into the formation of the aggregates via different pathways. The tetranuclear complexes adopt a modified butterfly structure with a more complex bridging network while trapping of an extra CoII ion in the pentanuclear complexes destroys this arrangement putting the Co-Co-Co axis above the Ln-Ln axis. Direct current (dc) magnetic susceptibility measurements reveal weak antiferromagnetic coupling in 1. Complexes 2 and 5 display no slow magnetic relaxation, whereas complexes 3 and 4 display out-of-phase signals at low temperature in ac susceptibility measurements. All compounds were analyzed with DFT and CASSCF calculations and informations about the single-ion anisotropies and mutual 4f-4f/4f-3d magnetic interactions were derived.
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Affiliation(s)
- Dipmalya Basak
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
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7
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Khurana R, Gupta S, Ali ME. First-Principles Investigations of Magnetic Anisotropy and Spin-Crossover Behavior of Fe(III)-TBP Complexes. J Phys Chem A 2021; 125:2197-2207. [PMID: 33617261 DOI: 10.1021/acs.jpca.1c00022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
With the ongoing effort to obtain mononuclear 3d-transition-metal complexes that manifest slow relaxation of magnetization and, hence, can behave as single-molecule magnets (SMMs), we have modeled 14 Fe(III) complexes based on an experimentally synthesized (PMe3)2FeCl3 complex [J. Am. Chem. Soc. 2017, 139 (46), 16474-16477], by varying the axial ligands with group XV elements (N, P, and As) and equatorial halide ligands from F, Cl, Br, and I. Out of these, nine complexes possess large zero field splitting (ZFS) parameter D in the range of -40 to -60 cm-1. The first-principles investigation of the ground-spin state applying density functional theory (DFT) and wave function-based multiconfigurations methods, e.g., SA-CASSCF/NEVPT2, are found to be quite consistent except for few delicate cases with near-degenerate spin states. In such cases, the hybrid B3LYP functional is found to be biased toward high-spin (HS) state. Altering the percentage of exact exchange admixed in the B3LYP functional leads to intermediate-spin (IS) ground state consistent with the multireference calculations. The origin of large zero field splitting (ZFS) in the Fe(III)-based trigonal bipyramidal (TBP) complexes is investigated. Furthermore, a number of complexes are identified with very small ΔGHS-ISadia. values indicating the possible spin-crossover phenomenon between the bistable spin states.
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Affiliation(s)
- Rishu Khurana
- Institute of Nano Science and Technology, Sector-81, Mohali, Punjab 140306, India
| | - Sameer Gupta
- Institute of Nano Science and Technology, Sector-81, Mohali, Punjab 140306, India
| | - Md Ehesan Ali
- Institute of Nano Science and Technology, Sector-81, Mohali, Punjab 140306, India
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8
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Biswas M, Basak D, Sañudo EC, Ray D. Heterodinuclear [Co-Ln] complexes of semicarbazide-arm bearing ligand: synthesis from the cleavage of starting [Co-Co] complex, structures and magnetic properties. NEW J CHEM 2021. [DOI: 10.1039/d1nj00971k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cleavage of a [Co-Co] precursor by an anionic form of 1-(2-hydroxy-3-methoxybenzylidene)semicarbazide in the presence of Ln(NO)3·nH2O salts provided new dinuclear [Co-Ln] complexes from a single-ligand anion support and scrambling of pivalate ions.
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Affiliation(s)
- Mousumi Biswas
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - Dipmalya Basak
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - E. Carolina Sañudo
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut de Nanociència i Nanotecnologia
| | - Debashis Ray
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721 302
- India
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9
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Mondal A, Raizada M, Sahu PK, Konar S. A new family of Fe 4Ln 4 (Ln = Dy III, Gd III, Y III) wheel type complexes with ferromagnetic interaction, magnetocaloric effect and zero-field SMM behavior. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00781e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Observation of ferromagnetic interactions and single molecule toroic (SMT) behavior in Fe4Ln4 wheel complexes.
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Affiliation(s)
- Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, MP, India
| | - Mukul Raizada
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, MP, India
| | - Pradip Kumar Sahu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, MP, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, MP, India
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10
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A Quasi-Liner {MnIIDyIIIMnII} Cluster Featuring In Situ Schiff Base Ligand Transformation. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01901-9] [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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11
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Biswas M, Sañudo EC, Ray D. Octanuclear Ni
4
Ln
4
Coordination Aggregates from Schiff Base Anion Supports and Connecting of Two Ni
2
Ln
2
Cubes: Syntheses, Structures, and Magnetic Properties. Chem Asian J 2020; 15:2731-2741. [DOI: 10.1002/asia.202000679] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/08/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Mousumi Biswas
- Department of Chemistry Indian Institute of Technology Kharagpur 721 302 India
| | - E. Carolina Sañudo
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institut de Nanociència i Nanotecnologia Universitat de Barcelona (IN2UB) 08028 Barcelona Spain
| | - Debashis Ray
- Department of Chemistry Indian Institute of Technology Kharagpur 721 302 India
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12
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Zhou Z, Li MX, Sui Y, Nfor EN, Wang ZX. Two 1D homochiral heterometallic chains: crystal structures, spectra, ferroelectricity and ferromagnetic properties. RSC Adv 2020; 10:7004-7010. [PMID: 35493874 PMCID: PMC9049737 DOI: 10.1039/d0ra00732c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 02/09/2020] [Indexed: 11/22/2022] Open
Abstract
Two new homo chiral Cu-Ln (Ln = Gd and Ho) compounds bearing a chiral Schiff base ligand (1R,3S)-N',N''-bis[3-methoxysalicylidene]-1,3-diamino-1,2,2-trimethylcyclopentane (H2L) have been synthesized and characterized by elemental analysis, IR spectroscopic and single-crystal X-ray diffraction techniques. The compounds were found to exhibit 1D zig-zag skeletons with double μ-1,5 bridging dicyanamide anions. Circular dichroism (CD) spectra have been used to verify their chiroptical activities. Magnetic studies suggest that 1 and 2 hold the same magnetic behavior with the dinuclear compounds presenting ferromagnetic interaction. Furthermore, both compounds show ferroelectricity with the remnant polarization (P r) value of 0.23 and 0.18 μC cm-2 at room temperature, respectively.
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Affiliation(s)
- Zhuoqiang Zhou
- Department of Pharmaceutical Engineering, College of Materials & Energy, South China Agricultural University Guangzhou 510642 PR China
| | - Ming-Xing Li
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Shanghai University Shanghai 200444 PR China
| | - Yan Sui
- School of Chemistry and Chemical Engineering, The Key Laboratory of Coordination Chemistry of Jiangxi Province, Jinggangshan University Ji'an Jiangxi 343009 PR China
| | - Emmanuel N Nfor
- Department of Chemistry, Faculty of Science, University of Buea POBox 63 Buea Cameroon
| | - Zhao-Xi Wang
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Shanghai University Shanghai 200444 PR China
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13
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Kobylarczyk J, Liberka M, Konieczny P, Baran S, Kubicki M, Korzeniak T, Podgajny R. Bulky ligands shape the separation between the large spin carriers to condition field-induced slow magnetic relaxation. Dalton Trans 2020; 49:300-311. [PMID: 31774091 DOI: 10.1039/c9dt03903a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystal engineering of magnetic relaxation in supramolecular networks based on almost isotropic cyanido-bridged {Mn9[W(CN)8]6L8(solv)8} clusters decorated by bulky 4,4'-di-tert-butyl-2,2'-bipyridine (But2bpy) and 4,7-diphenyl-1,10-phenanthroline (Ph2phen) ligands is presented. The three new compounds {MnII9[WV(CN)8]6(But2bpy)8(MeOH)8}·Pri2O·13MeOH (1), {MnII9[WV(CN)8]6(But2bpy)8(MeOH)6(H2O)2}·4Pri2O·2H2O (1a), and {MnII9[WV(CN)8]6(Ph2phen)8(MeOH)8}·29MeOH·6H2O (2) were characterized structurally and magnetically. Compound 1 exhibits unequivocal domination of repulsive intercluster contacts operating between the side But groups leading to intercluster distances exceeding 10 Å in all three dimensions. Compound 1a reveals a 1-dimensional (1D) supramolecular chain structure with very close intercluster distances of 6.7 Å realized through the direct W-CNHO-Mn hydrogen bonds along the chain, further isolated by the above repulsive ButBut synthons. Compound 2 shows significant separation in all three directions with the intercluster distances close to 10, 12 and 13.5 Å. However, in contrast to 1, these separations are accompanied by indirect hydrogen bond arrays and local π-π interactions of potential to assist in the transfer of weak magnetic interactions. The dc magnetic data show the signature of S = 39/2 in the ground state, which is typical in this group of compounds. The high-spin clusters are accompanied by different intercluster interactions, illustrated by the effective zJ' values of +0.010 cm-1 (1), +0.008 cm-1 (1a) and +0.001 cm-1 (2). The low temperature ac susceptibility measurements revealed a temperature- and field-dependent magnetic relaxation time for all 1, 1a and 2 compounds (τ1, τ1a-fast, and τ2-fast in the range 10-3-10-4 s). In contrast and only in the case of 1a and 2, an additional temperature independent slow process was detected (τ1a-slow and τ2-slow located between 0.1 s and 1 s). The magnetic relaxations were correlated with the obtained supramolecular networks, indicating the significant role of dipolar fields, weak non-covalent interactions, hydrogen bonds and π-π interactions.
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Affiliation(s)
- Jedrzej Kobylarczyk
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
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14
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Chang WW, Yang H, Tian HQ, Li DC, Dou JM. 3d–4f Metallacrown complexes with a new sandwich core: synthesis, structures and single molecule magnet behavior. NEW J CHEM 2020. [DOI: 10.1039/d0nj00292e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Two heterometallic metallacrown complexes, [Er{Cu4(butyrat)4}2]·Cl3·MeOH·26H2O (1) and [Yb{Cu4(butyrat)4}2]·Cl3·MeOH·26H2O (2) (H2butyrat = 3-aminobutyric hydroxamic acid), have been reported.
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Affiliation(s)
- Wen-Wen Chang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Hua Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Hai-Quan Tian
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Da-Cheng Li
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Jian-Min Dou
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- P. R. China
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15
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Dey A, Acharya J, Chandrasekhar V. Heterometallic 3d–4f Complexes as Single‐Molecule Magnets. Chem Asian J 2019; 14:4433-4453. [DOI: 10.1002/asia.201900897] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Atanu Dey
- Tata Institute of Fundamental Research Hyderabad Gopanpally Hyderabad- 500107 India
| | - Joydev Acharya
- Department of ChemistryIndian Institute of Technology Kanpur Kanpur- 208016 India
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad Gopanpally Hyderabad- 500107 India
- Department of ChemistryIndian Institute of Technology Kanpur Kanpur- 208016 India
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A Novel Family of Triangular CoII2LnIII and CoII2YIII Clusters by the Employment of Di-2-Pyridyl Ketone. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5020035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The synthesis, structural characterization and magnetic study of novel CoII/4f and CoII/YIII clusters are described. In particular, the initial employment of di-2-pyridyl ketone, (py)2CO, in mixed metal Co/4f chemistry, provided access to four triangular clusters, [CoII2MIII{(py)2C(OEt)(O)}4(NO3)(H2O)]2[M(NO3)5](ClO4)2 (M = Gd, 1; Dy, 2; Tb, 3; Y, 4), where (py)2C(OEt)(O)− is the monoanion of the hemiketal form of (py)2CO. Clusters 1–4 are the first reported Co/4f (1–3) and Co/Y (4) species bearing (py)2CO or its derivatives, despite the fact that over 200 metal clusters bearing this ligand have been reported so far. Variable-temperature, solid-state dc and ac magnetic susceptibility studies were carried out on 1–4 and revealed the presence of weak ferromagnetic exchange interactions between the metal ions (JCo-Co = +1.3 and +0.40 cm−1 in 1 and 4, respectively; JCo-Gd = +0.09 cm−1 in 1). The ac susceptibility studies on 2 revealed nonzero, weak out-of-phase (χ’’M) signals below ~5 K.
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Two new metallacrowns with concurrent 9-MC-3 and offset stacked 8-MC-3 frameworks, and field-induced single-molecule magnet behavior. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.03.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Wang K, Zhang J, Lu J, Jing P, Li L. Slow magnetic relaxation in Cu-Ln heterometallic Schiff base complexes containing Ln(hfac)4− as counterions. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Yin CL, Hu ZB, Long QQ, Wang HS, Li J, Song Y, Zhang ZC, Zhang YQ, Pan ZQ. Single molecule magnet behaviors of Zn4Ln2 (Ln = DyIII, TbIII) complexes with multidentate organic ligands formed by absorption of CO2 in air through in situ reactions. Dalton Trans 2019; 48:512-522. [DOI: 10.1039/c8dt03849j] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two novel Zn–Ln (Ln = Dy (1), Tb (2)) complexes showing single molecule magnet behaviors have been reported.
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Affiliation(s)
- Cheng-Ling Yin
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Qiao-Qiao Long
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Hui-Sheng Wang
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Zai-Chao Zhang
- Jiangsu Key Laboratory for the Chemistry of Low-dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zhi-Quan Pan
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
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20
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Mahapatra P, Koizumi N, Kanetomo T, Ishida T, Ghosh A. A series of CuII–LnIII complexes of an N2O3 donor asymmetric ligand and a possible CuII–TbIII SMM candidate in no bias field. NEW J CHEM 2019. [DOI: 10.1039/c8nj03512a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Among four isostructural heterometallic CuII–LnIII complexes (Ln = Tb, Dy, Ho or Er) of an N2O3 donor asymmetric ligand, only the CuII–TbIII complex shows SMM behavior at zero bias field but at applied bias field both the CuII–TbIII and CuII–DyIII complexes show SMM behavior.
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Affiliation(s)
- Prithwish Mahapatra
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700009
- India
| | - Naoki Koizumi
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Takuya Kanetomo
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Takayuki Ishida
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Ashutosh Ghosh
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700009
- India
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21
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Bazhina ES, Aleksandrov GG, Kiskin MA, Korlyukov AA, Efimov NN, Bogomyakov AS, Starikova AA, Mironov VS, Ugolkova EA, Minin VV, Sidorov AA, Eremenko IL. The First Series of Heterometallic Ln
III
‐V
IV
Complexes Based on Substituted Malonic Acid Anions: Synthesis, Structure and Magnetic Properties. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Evgeniya S. Bazhina
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Grigory G. Aleksandrov
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Mikhail A. Kiskin
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Alexander A. Korlyukov
- A.N. Nesmeyanov Institute of Organoelement Compounds the Russian Academy of Sciences Vavilova St. 28 119991 Moscow Russian Federation
| | - Nikolay N. Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center Siberian Branch of the Russian Academy of Sciences Institutskaya St. 3a 630090 Novosibirsk Russian Federation
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry Southern Federal University Stachka Ave. 194/2 344090 Rostov‐on‐Don Russian Federation
| | - Vladimir S. Mironov
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” the Russian Academy of Sciences Leninsky Ave. 59 119333 Moscow Russian Federation
| | - Elena A. Ugolkova
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Vadim V. Minin
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Alexey A. Sidorov
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
| | - Igor L. Eremenko
- N.S. Kurnakov Institute of General and Inorganic Chemistry the Russian Academy of Sciences Leninsky Ave. 31 119991 Moscow Russian Federation
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22
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Family of [Ln4Mn8] (Ln = Gd, Tb, Dy, Ho) and Y4Mn8 single-molecule magnets from the use of 2-(pyridine-2-yl)propan-2-ol. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Vignesh KR, Langley SK, Moubaraki B, Murray KS, Rajaraman G. Understanding the Mechanism of Magnetic Relaxation in Pentanuclear {Mn IVMn III2Ln III2} Single-Molecule Magnets. Inorg Chem 2018; 57:1158-1170. [PMID: 29308893 DOI: 10.1021/acs.inorgchem.7b02608] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A new family of heterometallic pentanuclear complexes of formulas [MnIVMnIII2LnIII2O2(benz)4(mdea)3(NO3)2(MeOH)] (Ln = Dy (1-Dy), Tb (2-Tb), Gd (3-Gd), Eu (4-Eu), Sm (5-Sm), Nd (6-Nd), Pr (7-Pr); benz(H) = benzoic acid; mdeaH2= N-methyldiethanolamine) and [MnIVMnIII2LnIII2O2(o-tol)4(mdea)3(NO3)2(MeOH)] (Ln = Gd (8-Gd), Eu (9-Eu); o-tol(H) = o-toluic acid) have been isolated and structurally, magnetically, and theoretically characterized. dc magnetic susceptibility measurements reveal dominant antiferromagnetic magnetic interactions for each complex, except for 2-Tb and 3-Gd, which reveal an upturn in the χMT product at low temperatures. The magnetic interactions between the spin centers in the Gd derivatives, 3-Gd and 8-Gd, which display markedly different χMT vs T profiles, were found to be due to the interactions of the GdIII-GdIII ions which change from ferromagnetic (3-Gd) to antiferromagnetic (8-Gd) due to structural differences. ac magnetic susceptibility measurements reveal a nonzero out-of-phase component for 1-Dy and 7-Pr, but no maxima were observed above 2 K (Hdc = 0 Oe), which suggests single-molecule magnet (SMM) behavior. Out-of-phase signals were observed for complexes 2-Tb, 4-Eu, 8-Gd, and 9-Eu, in the presence of a static dc field (Hdc = 2000, 3000 Oe). The anisotropic nature of the lanthanide ions in the benzoate series (1-Dy, 2-Tb, 5-Sm, 6-Nd, and 7-Pr) were thoroughly investigated using ab initio methods. CASSCF calculations predict that the origin of SMM behavior in 1-Dy and 7-Pr and the applied field SMM behavior in 2-Tb does not solely originate from the single-ion anisotropy of the lanthanide ions. To fully understand the relaxation mechanism, we have employed the Lines model to fit the susceptibility data using the POLY_ANISO program, which suggests that the zero-field SMM behavior observed in complexes 1-Dy and 7-Pr is due to weak MnIII/IV-LnIII and LnIII-LnIII couplings and an unfavorable LnIII/MnIII/MnIV anisotropy. In complexes 4-Eu, 8-Gd, and 9-Eu ab initio calculations indicate that the anisotropy of the MnIII ions solely gives rise to the possibility of SMM behavior. Complex 7-Pr is a Pr(III)-containing complex that displays zero-field SMM behavior, which is rare, and our study suggests the possibility of coupling weak SOC lanthanide metal ions to anisotropic transition-metal ions to derive SMM characteristics; however, enhancing the exchange coupling in {3d-4f} complexes is still a stubborn hurdle in harnessing new generation {3d-4f} SMMs.
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Affiliation(s)
| | - Stuart K Langley
- School of Science and the Environment, Division of Chemistry, Manchester Metropolitan University , Manchester, U.K
| | - Boujemaa Moubaraki
- School of Chemistry, 17 Rainforest Walk, Monash University , Clayton, Victoria 3800, Australia
| | - Keith S Murray
- School of Chemistry, 17 Rainforest Walk, Monash University , Clayton, Victoria 3800, Australia
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24
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Ke H, Wei W, Zhang YQ, Zhang J, Xie G, Chen S. Influence of alcoholic solvent and acetate anion coordination mode variations on structures and magnetic properties of heterometallic Zn2Dy2 tetranuclear clusters. Dalton Trans 2018; 47:16616-16626. [DOI: 10.1039/c8dt03983f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We clarify that slight modifications of the synthetic conditions generate two Zn2Dy2 clusters with acetate anion coordination mode variation and different magnetic behaviors.
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Affiliation(s)
- Hongshan Ke
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- P. R. China
| | - Wen Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Jun Zhang
- School of Materials and Chemical Engineering
- Anhui Jianzhu University
- Hefei
- P. R. China
| | - Gang Xie
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- P. R. China
| | - Sanping Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- P. R. China
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25
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Sikdar Y, Goswami R, Modak R, Basak M, Heras Ojea MJ, Murrie M, Goswami S. Diazine based ligand supported CoII3 and CoII4 coordination complexes: role of anions. NEW J CHEM 2018. [DOI: 10.1039/c8nj02955e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Synthesis of triple helical CoII4 and double helical CoII3 from diazine-based ligands and their magnetic behavior rationalized by susceptibility measurements.
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Affiliation(s)
- Yeasin Sikdar
- Department of Chemistry
- University of Calcutta
- 92, A.P.C. Road
- Kolkata
- India
| | - Ranadip Goswami
- Department of Chemistry
- University of Calcutta
- 92, A.P.C. Road
- Kolkata
- India
| | - Ritwik Modak
- Department of Chemistry
- University of Calcutta
- 92, A.P.C. Road
- Kolkata
- India
| | - Megha Basak
- Department of Chemistry
- University of Calcutta
- 92, A.P.C. Road
- Kolkata
- India
| | | | - Mark Murrie
- WestCHEM, School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
| | - Sanchita Goswami
- Department of Chemistry
- University of Calcutta
- 92, A.P.C. Road
- Kolkata
- India
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26
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Chakraborty A, Goura J, Kalita P, Swain A, Rajaraman G, Chandrasekhar V. Heterometallic 3d–4f single molecule magnets containing diamagnetic metal ions. Dalton Trans 2018; 47:8841-8864. [DOI: 10.1039/c8dt01883a] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This perspective deals with the synthesis and study of SMM properties of heterometallic 3d–4f complexes containing diamagnetic 3d metal ions.
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Affiliation(s)
- Amit Chakraborty
- School of Chemical Sciences
- National Institute of Science Education and Research Bhubaneswar
- Khurda – 752050
- India
- Department of Chemistry
| | - Joydeb Goura
- School of Chemical Sciences
- National Institute of Science Education and Research Bhubaneswar
- Khurda – 752050
- India
- Department of Chemistry
| | - Pankaj Kalita
- School of Chemical Sciences
- National Institute of Science Education and Research Bhubaneswar
- Khurda – 752050
- India
| | - Abinash Swain
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400 076
- India
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400 076
- India
| | - Vadapalli Chandrasekhar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
- Tata Institute of Fundamental Research Hyderabad
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27
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Georgopoulou AN, Al-Ameed K, Boudalis AK, Anagnostopoulos DF, Psycharis V, McGrady JE, Sanakis Y, Raptopoulou CP. Site preferences in hetero-metallic [Fe 9-xNi x] clusters: a combined crystallographic, spectroscopic and theoretical analysis. Dalton Trans 2017; 46:12835-12844. [PMID: 28920627 DOI: 10.1039/c7dt02930f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of mixtures of Fe(O2CMe)2·2H2O and Ni(O2CMe)2·4H2O of various compositions with di-2-pyridyl ketone (py2CO, dpk) in MeCN under an inert atmosphere afforded a family of hetero-metallic enneanuclear clusters with general formula [Fe9-xNix(μ4-OH)2(O2CMe)8(py2CO2)4] (2, x = 1.00; 3: x = 6.02; 4, x = 7.46; 5, x = 7.81). Clusters 2-5 are isomorphous to the homo-metallic [Fe9] cluster (1) previously reported by some of us, and also isostructural to the known homo-metallic [Ni9] cluster. All four clusters contain a central MII ion in an unusual 8-coordinate site and eight peripheral MII ions in distorted octahedral environments. The distribution of FeII and NiII ions over these two distinct coordination sites in 2-5 can be established through a combination of X-ray fluorescence and Mössbauer spectroscopies, which show that FeII preferentially occupies the unique 8-coordinate metal site while NiII accumulates in the octahedral holes. Density functional theory indicates that the distribution of ions across the two sites arises not from any intrinsic preference of the FeII ions for the 8-coordinate sites, but rather because of the large ligand field stabilization energy available to NiII in octahedral coordination.
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Affiliation(s)
- Anastasia N Georgopoulou
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 15310 Aghia Paraskevi, Athens, Greece.
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28
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Li C, Li H, Xie J, Yang M, Wang X, Li L. {[Ln(hfac)3]2[Cu(hfac)2]3(NIT-Pyrim)2(H2O)2} (LnIII= Gd, Ho, Er): Unique Nitronyl Nitroxide Bridged 3d-4f Heterometallic Clusters. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700576] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cun Li
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
| | - Hongdao Li
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
| | - Jing Xie
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
| | - Meng Yang
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
| | - Xiufeng Wang
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
| | - Licun Li
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry; College of Chemistry; Nankai University; 300071 Tianjin China
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29
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Savva M, Skordi K, Fournet AD, Thuijs AE, Christou G, Perlepes SP, Papatriantafyllopoulou C, Tasiopoulos AJ. Heterometallic MnIII4Ln2 (Ln = Dy, Gd, Tb) Cross-Shaped Clusters and Their Homometallic MnIII4MnII2 Analogues. Inorg Chem 2017; 56:5657-5668. [DOI: 10.1021/acs.inorgchem.7b00191] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Maria Savva
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus
| | - Katerina Skordi
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus
| | - Adeline D. Fournet
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Annaliese E. Thuijs
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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30
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31
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Wen HR, Dong PP, Liu SJ, Liao JS, Liang FY, Liu CM. 3d–4f heterometallic trinuclear complexes derived from amine-phenol tripodal ligands exhibiting magnetic and luminescent properties. Dalton Trans 2017; 46:1153-1162. [DOI: 10.1039/c6dt04027f] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses, crystal structures, and magnetic properties of a family of new 3d–4f heterometallic trinuclear complexes were investigated. Slow magnetic relaxation was observed for the Zn–Dy–Zn complex besides stronger fluorescent emissions.
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Affiliation(s)
- He-Rui Wen
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P.R. China
| | - Piao-Ping Dong
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P.R. China
| | - Sui-Jun Liu
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P.R. China
| | - Jin-Sheng Liao
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P.R. China
| | - Fu-Yong Liang
- School of Metallurgical 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 100190
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32
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Family of MnIII4LnIII2 (LnIII= SmIII, GdIII, DyIII) coordination clusters: Experimental and theoretical investigations. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Li YM, Kuang WW, Zhu LL, Xu Y, Yang PP. Two Discrete Ln12
Shelf-Shaped Clusters: Magnetic Studies Reveal a Significant Cryogenic Magnetocaloric Effect and Slow Magnetic Relaxation. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600556] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yi-Ming Li
- College of Chemistry and Materials Science; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
| | - Wei-Wei Kuang
- College of Chemistry and Materials Science; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
| | - Li-Li Zhu
- College of Chemistry and Materials Science; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
| | - Yun Xu
- College of Chemistry and Materials Science; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
| | - Pei-Pei Yang
- College of Chemistry and Materials Science; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
- Anhui Key Laboratory of Energetic Materials; Huaibei Normal University; 100 Dongshan Road 235000 Huaibei People's Republic of China
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34
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Chakov NE, Thuijs AE, Wernsdorfer W, Rheingold AL, Abboud KA, Christou G. Unusual Mn(III/IV)4 Cubane and Mn(III)16M4 (M = Ca, Sr) Looplike Clusters from the Use of Dimethylarsinic Acid. Inorg Chem 2016; 55:8468-77. [PMID: 27504743 DOI: 10.1021/acs.inorgchem.6b01077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three complexes are reported from the initial use of dimethylarsinic acid (Me2AsO2H) in Mn(III/IV) cluster chemistry, [Mn4O4(O2AsMe2)6] (3; 2Mn(III), 2Mn(IV)), and [Mn16X4O8(O2CPh)16(Me2AsO2)24] (X = Ca(2+) (4) or Sr(2+) (5); 16Mn(III)). They were obtained from reactions with [Mn12O12(O2CR)16(H2O)4] (R = Me, Ph) either without (3) or with (4 and 5) the addition of X(2+) salts. Complex 3 contains a [Mn4O4](6+) cubane, whereas isostructural 4 and 5 contain a planar loop structure comprising four Mn4 asymmetric "butterfly" units linked by alternating anti,anti μ-O2AsMe2 and {X2(O2AsMe2)(O2CPh)2} units. Variable-temperature magnetic susceptibility (χM) data were collected on dried microcrystalline samples of 3-5 in the 5.0-300 K range in a 0.1 T (1000 G) direct-current (dc) magnetic field. Data for 3 were fit to the appropriate Van Vleck equation (using the [Formula: see text] = -2JŜi·Ŝj convention) for a cubane of virtual C2v symmetry, giving J33 = 0.0(1) cm(-1), J34 = -3.4(4) cm(-1), J44 = -9.8(2) cm(-1), and g = 1.99(1), where the Jij subscripts refer to the oxidation states of the interacting Mn atoms. The ground state thus consists of two coupled Mn(IV) and two essentially noninteracting Mn(III). For 4 and 5, low-lying excited states from the high nuclearity and weak couplings prevent fits of dc magnetization data, but in-phase alternating current susceptibility χ'MT data down to 1.8 K indicate them to possess S = 4 ground states, if considered single Mn16 units. If instead they are treated as tetramers of weakly coupled Mn4 units, then each of the latter has an S = 2 ground state. Complexes 4 and 5 also exhibit very weak out-of-phase χ″M signals characteristic of slow relaxation, and magnetization versus dc field scans on a single crystal of 4·15MeCN at T ≥ 0.04 K showed hysteresis loops but with unusual features suggesting the magnetization relaxation barrier consists of more than one contribution.
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Affiliation(s)
- Nicole E Chakov
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
| | - Annaliese E Thuijs
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
| | | | - Arnold L Rheingold
- Department of Chemistry, University of California at San Diego , La Jolla, California 92093-0358, United States
| | - Khalil A Abboud
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
| | - George Christou
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
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35
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Zaltariov MF, Cazacu M, Sacarescu L, Vlad A, Novitchi G, Train C, Shova S, Arion VB. Oxime-Bridged Mn6 Clusters Inserted in One-Dimensional Coordination Polymer. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01149] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Maria Cazacu
- “Petru
Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Liviu Sacarescu
- “Petru
Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Angelica Vlad
- “Petru
Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Ghenadie Novitchi
- Laboratoire National des Champs Magnétiques Intenses, CNRSUPR 3228, Univ. Grenoble-Alpes, 25 Rue
des Martyrs, 38042 Grenoble, France
| | - Cyrille Train
- Laboratoire National des Champs Magnétiques Intenses, CNRSUPR 3228, Univ. Grenoble-Alpes, 25 Rue
des Martyrs, 38042 Grenoble, France
| | - Sergiu Shova
- “Petru
Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Vladimir B. Arion
- Institute of Inorganic Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
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Papatriantafyllopoulou C, Moushi EE, Christou G, Tasiopoulos AJ. Filling the gap between the quantum and classical worlds of nanoscale magnetism: giant molecular aggregates based on paramagnetic 3d metal ions. Chem Soc Rev 2016; 45:1597-628. [PMID: 26767319 DOI: 10.1039/c5cs00590f] [Citation(s) in RCA: 169] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this review, aspects of the syntheses, structures and magnetic properties of giant 3d and 3d/4f paramagnetic metal clusters in moderate oxidation states are discussed. The term "giant clusters" is used herein to denote metal clusters with nuclearity of 30 or greater. Many synthetic strategies towards such species have been developed and are discussed in this paper. Attempts are made to categorize some of the most successful methods to giant clusters, but it will be pointed out that the characteristics of the crystal structures of such compounds including nuclearity, shape, architecture, etc. are unpredictable depending on the specific structural features of the included organic ligands, reaction conditions and other factors. The majority of the described compounds in this review are of special interest not only for their fascinating nanosized structures but also because they sometimes display interesting magnetic phenomena, such as ferromagnetic exchange interactions, large ground state spin values, single-molecule magnetism behaviour or impressively large magnetocaloric effects. In addition, they often possess the properties of both the quantum and the classical world, and thus their systematic study offers the potential for the discovery of new physical phenomena, as well as a better understanding of the existing ones. The research field of giant clusters is under continuous evolution and their intriguing structural characteristics and magnetism properties that attract the interest of synthetic Inorganic Chemists promise a brilliant future for this class of compounds.
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Affiliation(s)
| | - Eleni E Moushi
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus.
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA.
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Costes JP, Titos-Padilla S, Oyarzabal I, Gupta T, Duhayon C, Rajaraman G, Colacio E. Effect of Ligand Substitution around the DyIII on the SMM Properties of Dual-Luminescent Zn–Dy and Zn–Dy–Zn Complexes with Large Anisotropy Energy Barriers: A Combined Theoretical and Experimental Magnetostructural Study. Inorg Chem 2016; 55:4428-40. [DOI: 10.1021/acs.inorgchem.6b00228] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jean Pierre Costes
- Laboratoire de Chimie de Coordination, 205, route de Narbonne, Toulouse, 31077, France
| | - Silvia Titos-Padilla
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada (Spain)
| | - Itziar Oyarzabal
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco, UPV/EHU, Paseo Manuel Lardizabal, No. 3, 20018, Donostia-San Sebastián, Spain
| | - Tulika Gupta
- Department of Chemistry, Indian Institute of Technology—Bombay, Powai, Mumbai−400076, India
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination, 205, route de Narbonne, Toulouse, 31077, France
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology—Bombay, Powai, Mumbai−400076, India
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada (Spain)
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38
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Chorazy S, Stanek JJ, Nogaś W, Majcher AM, Rams M, Kozieł M, Juszyńska-Gałązka E, Nakabayashi K, Ohkoshi SI, Sieklucka B, Podgajny R. Tuning of Charge Transfer Assisted Phase Transition and Slow Magnetic Relaxation Functionalities in {Fe(9-x)Co(x)[W(CN)8]6} (x = 0-9) Molecular Solid Solution. J Am Chem Soc 2016; 138:1635-46. [PMID: 26761594 DOI: 10.1021/jacs.5b11924] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Precisely controlled stoichiometric mixtures of Co(2+) and Fe(2+) metal ions were combined with the [W(V)(CN)8](3-) metalloligand in a methanolic solution to produce a series of trimetallic cyanido-bridged {Fe(9-x)Co(x)[W(CN)8]6(MeOH)24}·12MeOH (x = 0, 1, ..., 8, 9; compounds 0, 1, ..., 8, 9) clusters. All the compounds, 0-9, are isostructural, and consist of pentadecanuclear clusters of a six-capped body-centered cube topology, capped by methanol molecules which are coordinated to 3d metal centers. Thus, they can be considered as a unique type of a cluster-based molecular solid solution in which different Co/Fe metal ratios can be introduced while preserving the coordination skeleton and the overall molecular architecture. Depending on the Co/Fe ratio, 0-9 exhibit an unprecedented tuning of magnetic functionalities which relate to charge transfer assisted phase transition effects and slow magnetic relaxation effects. The iron rich 0-5 phases exhibit thermally induced reversible structural phase transitions in the 180-220 K range with the critical temperatures being linearly dependent on the value of x. The phase transition in 0 is accompanied by (HS)Fe(II) W(V) ↔ (HS)Fe(III) W(IV) charge transfer (CT) and the additional minor contribution of a Fe-based spin crossover (SCO) effect. The Co-containing 1-5 phases reveal two simultaneous electron transfer processes which explore (HS)Fe(II) W(V) ↔ (HS)Fe(III) W(IV) CT and the more complex (HS)Co(II) W(V) ↔ (LS)Co(III) W(IV) charge transfer induced spin transition (CTIST). Detailed structural, spectroscopic, and magnetic studies help explain the specific role of both types of CN(-)-bridged moieties: the Fe-NC-W linkages activate the molecular network toward a phase transition, while the subsequent Co-W CTIST enhances structural changes and enlarges thermal hysteresis of the magnetic susceptibility. On the second side of the 0-9 series, the vanishing phase transition in the cobalt rich 6-9 phases results in the high-spin ground state, and in the occurrence of a slow magnetic relaxation process at low temperatures. The energy barrier of the magnetic relaxation gradually increases with the increasing value of x, reaching up to ΔE/kB = 22.3(3) K for compound 9.
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Affiliation(s)
- Szymon Chorazy
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland.,Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Jan J Stanek
- Institute of Physics, Jagiellonian University , Łojasiewicza 11, 30-348 Kraków, Poland
| | - Wojciech Nogaś
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Anna M Majcher
- Institute of Physics, Jagiellonian University , Łojasiewicza 11, 30-348 Kraków, Poland
| | - Michał Rams
- Institute of Physics, Jagiellonian University , Łojasiewicza 11, 30-348 Kraków, Poland
| | - Marcin Kozieł
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Ewa Juszyńska-Gałązka
- H. Niewodniczański Insitute of Nuclear Physics PAN , Radzikowskiego 152, 31-342 Kraków, Poland
| | - Koji Nakabayashi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shin-ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Robert Podgajny
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
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39
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Stavgianoudaki N, Siczek M, Lis T, Inglis R, Milios CJ. A triacontanuclear [Zn12Dy18] cluster: a ring of [Dy4] cubes. Chem Commun (Camb) 2016; 52:343-5. [PMID: 26514878 DOI: 10.1039/c5cc07243c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction between Dy(NO3)3·6H2O, Zn(OAc)2·4H2O, salicylaldehyde and 2-amino-isobutyric acid, in MeOH in the presence of NEt3 under solvothermal conditions, led to the isolation of the triacontanuclear mixed-metal cluster [Zn(II)12Dy(III)18(OH)30(L)12(sal)6(OAc)6(NO3)3(H2O)6](NO3)3·12MeOH·5H2O (1·12MeOH·5H2O), which displays frequency- and temperature-dependent out-of-phase magnetic susceptibility signals.
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40
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Yao MX, Zhu ZX, Lu XY, Deng XW, Jing S. Rare single-molecule magnets with six-coordinate LnIII ions exhibiting a trigonal antiprism configuration. Dalton Trans 2016; 45:10689-95. [DOI: 10.1039/c6dt01606e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four Ni–Ln–Ni heterometallic complexes containing seven- and six-coordinate LnIII ions have been obtained and structurally characterized. Magnetic studies show that Dy derivatives are rare single-molecule magnets containing six-coordinate LnIII ions.
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Affiliation(s)
- Min-Xia Yao
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Zhao-Xia Zhu
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Xing-Yun Lu
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Xiao-Wei Deng
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Su Jing
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
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41
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Thuijs AE, Marton A, Stamatatos TC, Abboud KA, Christou G. High nuclearity cerium–manganese clusters and their structural and magnetic properties: CeIV3MnIII7 and CeIV5MnIII11. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Wang HS, Yang FJ, Long QQ, Huang ZY, Chen W, Pan ZQ, Song Y. Two unprecedented decanuclear heterometallic [MnII2MnIII6LnIII2] (Ln = Dy, Tb) complexes displaying relaxation of magnetization. Dalton Trans 2016; 45:18221-18228. [DOI: 10.1039/c6dt02945k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and magnetic properties of two novel [Mn8Ln2] complexes containing the gem-diol form of di-2-pyridyl ketone and triethanolamine were investigated.
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Affiliation(s)
- Hui-Sheng Wang
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - Feng-Jun Yang
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - Qiao-Qiao Long
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - Zhi-Yong Huang
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - Wei Chen
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - Zhi-Quan Pan
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Key Laboratory for Green Chemical Process of Ministry of Education
- Wuhan 430074
- P. R. China
| | - You Song
- State Key Laboratory of Coordinate Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
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43
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Goura J, Brambleby J, Topping CV, Goddard PA, Suriya Narayanan R, Bar AK, Chandrasekhar V. Heterometallic trinuclear {CoIII2LnIII} (Ln = Gd, Tb, Ho and Er) complexes in a bent geometry. Field-induced single-ion magnetic behavior of the ErIII and TbIII analogues. Dalton Trans 2016; 45:9235-49. [DOI: 10.1039/c5dt03871e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this paper we report the synthesis, structures and detailed magnetic properties of heterometallic trinuclear CoIIILnIII complexes.
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Affiliation(s)
- Joydeb Goura
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | | | - Craig V. Topping
- Department of Physics
- Clarendon Laboratory
- University of Oxford
- Oxford
- UK
| | | | | | - Arun Kumar Bar
- National Institute of Science Education and Research Bhubaneswar
- P.O. Jatni
- India
| | - Vadapalli Chandrasekhar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
- National Institute of Science Education and Research Bhubaneswar
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44
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Oyarzabal I, Artetxe B, Rodríguez-Diéguez A, García JÁ, Seco JM, Colacio E. A family of acetato-diphenoxo triply bridged dimetallic ZnIILnIII complexes: SMM behavior and luminescent properties. Dalton Trans 2016; 45:9712-26. [DOI: 10.1039/c6dt01327a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of Zn–Ln complexes that show interesting magnetic (SIM) and luminescent properties has been synthesized and characterized.
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Affiliation(s)
- Itziar Oyarzabal
- Departamento de Química Aplicada
- Facultad de Química
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 20018 Donostia-San Sebastián
- Spain
| | - Beñat Artetxe
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco UPV/EHU
- 48080 Bilbao
- Spain
| | | | - José Ángel García
- Dpto. de Física Aplicada II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco UPV/EHU
- 48080 Bilbao
- Spain
| | - José Manuel Seco
- Departamento de Química Aplicada
- Facultad de Química
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 20018 Donostia-San Sebastián
- Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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45
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Sun L, Chen H, Ma C, Chen C. Dodenuclear [Mn(III)(8)Ln(III)(4)] clusters with 2-(hydroxymethyl)pyridine: syntheses, structures, and magnetic properties. Dalton Trans 2015; 44:20964-71. [PMID: 26581752 DOI: 10.1039/c5dt03130c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of isostructural Mn/Ln dodenuclear clusters: [Mn8Ln4(O)8(hmp)4(O2CPh)12(NO3)4(PhCO2H)(C2H5OH)] [Ln = La (1), Pr (2), Nd (3), Gd (4), Dy(5), hmpH = 2-(hydroxymethyl)pyridine] have been synthesized by the reaction of Mn(NO3)2 and Ln(NO3)3·6H2O with hmpH and benzoic acid as co-ligands. Compounds 1-5 possess a spindle-shaped core of [MnLn(μ4-O)4(μ3-O)4(μ3-OR)2(μ2-OR)8](10+), which is composed of six face-sharing defected cubane units and two square-pyramidal units. The compounds represent the highest nuclearity Mn/Ln clusters with the use of hmpH to date. That the ferromagnetic interactions dominated within complexes 1-4 were suggested by solid-state dc magnetic susceptibility analyses. Compound 4 displays a magnetic-caloric effect (MCE) with 13.94 J kg(-1) K(-1) as the entropy change at 6 K for ΔH = 8 T. Compounds 1 and 5 exhibit an out-of-phase χ''M peak maximum above 2.0 K. Fitting of the ac susceptibility data to an Arrhenius law gives an energy barrier Ueff = 6.88/7.44 K for compounds 1 and 5 respectively.
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Affiliation(s)
- Lei Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
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46
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Singh SK, Beg MF, Rajaraman G. Role of Magnetic Exchange Interactions in the Magnetization Relaxation of {3d-4f} Single-Molecule Magnets: A Theoretical Perspective. Chemistry 2015; 22:672-80. [DOI: 10.1002/chem.201503102] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 11/08/2022]
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47
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Zangana KH, Pineda EM, Vitorica-Yrezabal IJ, McInnes EJL, Winpenny REP. Linking Cr₃ triangles through phosphonates and lanthanides: synthetic, structural, magnetic and EPR studies. Dalton Trans 2015; 43:13242-9. [PMID: 25072781 DOI: 10.1039/c4dt01264j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation and structural characterisation of five 3d-4f mixed metal phosphonate cages with general formula [Cr(III)6Ln(III)2(μ3-O)2(H2O)2(O3P(t)Bu)4(O2C(t)Bu)12(HO(i)Bu)2((i)PrNH2)2] where Ln(III) = La, 1; Tb, 3; Dy, 4; Ho, 5 and [Cr(III)6Gd(III)2(μ3-O)2(H2O)2(O3P(t)Bu)4(O2C(t)Bu)12(HO(i)Bu)4] (2) are reported. The structure contains two oxo-centred {Cr3} triangles, bridged by phosphonates and lanthanides. The magnetic behaviour of 1 has been modelled as two non-interacting isosceles triangles, involving two antiferromagnetic interactions (J1 = -8.8 cm(-1)) with a smaller ferromagnetic interaction for the unique edge of the triangle (J2 = +1.3 cm(-1)) giving an isolated S = 3/2 ground state per triangle. The quartet ground state has been proven through simulation of electron paramagnetic resonance (EPR) spectra obtained at the X- and Q-band. EPR simulations have also resulted in the introduction of small single-ion Zero Field Splitting (ZFS) parameters D = ±0.19 cm(-1) and rhombic term E = ±0.02 cm(-1), which are consistent with strong exchange limit calculations for an isolated S = 3/2 (D = ±0.22 and E = ±0.018 cm(-1)).
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Affiliation(s)
- Karzan H Zangana
- School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
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48
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Li XL, Min FY, Wang C, Lin SY, Liu Z, Tang J. Utilizing 3d–4f Magnetic Interaction to Slow the Magnetic Relaxation of Heterometallic Complexes. Inorg Chem 2015; 54:4337-44. [DOI: 10.1021/acs.inorgchem.5b00019] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao-Lei Li
- State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Fan-Yong Min
- State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
| | - Chao Wang
- State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Shuang-Yan Lin
- State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Zhiliang Liu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
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49
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Toward heterometallic single-molecule magnets: Synthetic strategy, structures and properties of 3d–4f discrete complexes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.10.004] [Citation(s) in RCA: 402] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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50
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Goura J, Brambleby J, Goddard P, Chandrasekhar V. A Single-Ion Magnet Based on a Heterometallic CoIII2DyIIIComplex. Chemistry 2015; 21:4926-30. [DOI: 10.1002/chem.201406021] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 11/11/2022]
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