1
|
Zhang Y, Liu ZY, Tang HM, Ding B, Liu ZY, Wang XG, Zhao XJ, Yang EC. Weak interchain interaction-dominated magnetic responses in water-extended cobalt( ii)-chains: from magnetic ordering to single-chain magnet. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01214f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Weak intermolecular interaction-dominated interchain magnetic couplings in water-extended cobalt(ii)-chains are found to be highly responsible for the magnetic evolution from magnetic ordering to single-chain magnet behavior.
Collapse
Affiliation(s)
- Yu Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Zhong-Yi Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Hui-Min Tang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Bo Ding
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Zheng-Yu Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Xiu-Guang Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Xiao-Jun Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
- Synergetic Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, P. R. China
| | - En-Cui Yang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| |
Collapse
|
2
|
Georgiev M, Chamati H. Molecular magnetism in the multi-configurational self-consistent field method. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:075803. [PMID: 33152727 DOI: 10.1088/1361-648x/abc802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We develop a structured theoretical framework used in our recent articles (2019 Eur. Phys. J. B 92 93 and 2020 Phys. Rev. B 101 094427) to characterize the unusual behavior of the magnetic spectrum, magnetization and magnetic susceptibility of the molecular magnet Ni4Mo12. The theoretical background is based on the molecular orbital theory in conjunction with the multi-configurational self-consistent field method and results in a post-Hartree-Fock scheme for constructing the corresponding energy spectrum. Furthermore, we construct a bilinear spin-like Hamiltonian involving discrete coupling parameters accounting for the relevant spectroscopic magnetic excitations, magnetization and magnetic susceptibility. The explicit expressions of the eigenenergies of the ensuing Hamiltonian are determined and the physical origin of broadening and splitting of experimentally observed peaks in the magnetic spectra is discussed. To demonstrate the efficiency of our method we compute the spectral properties of a spin-one magnetic dimer. The present approach may be applied to a variety of magnetic units based on transition metals and rare Earth elements.
Collapse
Affiliation(s)
- M Georgiev
- Institute of Solid State Physics, Bulgarian Academy of Sciences, Tsarigradsko Chaussée 72, 1784 Sofia, Bulgaria
| | - H Chamati
- Institute of Solid State Physics, Bulgarian Academy of Sciences, Tsarigradsko Chaussée 72, 1784 Sofia, Bulgaria
| |
Collapse
|
3
|
Affiliation(s)
- Yifan Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou Jiangsu 215123 China
| | - Kejian Chang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou Jiangsu 215123 China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou Jiangsu 215123 China
| |
Collapse
|
4
|
Shi L, Shao D, Wei X, Dunbar KR, Wang X. Enhanced Single‐Chain Magnet Behavior via Anisotropic Exchange in a Cyano‐Bridged Mo
III
–Mn
II
Chain. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001706] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Le Shi
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Xiao‐Qin Wei
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Kim R. Dunbar
- Department of Chemistry Texas A & M University College Station TX 77840 USA
| | - Xin‐Yi Wang
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| |
Collapse
|
5
|
Shi L, Shao D, Wei X, Dunbar KR, Wang X. Enhanced Single‐Chain Magnet Behavior via Anisotropic Exchange in a Cyano‐Bridged Mo
III
–Mn
II
Chain. Angew Chem Int Ed Engl 2020; 59:10379-10384. [DOI: 10.1002/anie.202001706] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/22/2020] [Indexed: 11/05/2022]
Affiliation(s)
- Le Shi
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Xiao‐Qin Wei
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Kim R. Dunbar
- Department of Chemistry Texas A & M University College Station TX 77840 USA
| | - Xin‐Yi Wang
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| |
Collapse
|
6
|
Zhang SL, Li SS, Li XC, Hou XH, Wang ZC, Ji XY, Chen L. An aromatic selenite bridged Mn( iii) chain compound showing the coexistence of single chain magnet and metamagnet behaviour. NEW J CHEM 2020. [DOI: 10.1039/d0nj04763e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new chain compound consisting of Mn2(salen)2 building blocks bridged by aromatic selenite was synthesized and characterized.
Collapse
Affiliation(s)
- Shao-Liang Zhang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Shan-Shan Li
- School of Environment and Planning
- Liaocheng University
- Liaocheng
- China
| | - Xin-Chao Li
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Xian-Hui Hou
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Zhi-Cheng Wang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Xiao-Ying Ji
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- China
| |
Collapse
|
7
|
Ma XF, Wang HL, Zhu ZH, Zou HH, Liu B, Wang Z, Ouyang ZW, Liang FP. Solvent-Induced Structural Diversity and Magnetic Research of Two Cobalt(II) Complexes. ACS OMEGA 2019; 4:20905-20910. [PMID: 31867480 PMCID: PMC6921263 DOI: 10.1021/acsomega.9b01781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
The solvent-induced topological and structural diversities of two Co(II) complexes, namely, [Co(L)2(SCN)2] (Co1) and [Co2(L)2(SCN)(OAc)3] (Co2) (L = 8-methoxyquinoline), were comparatively analyzed. Certain proportions of L, Co(OAc)2·4H2O, and NaSCN were mixed and dissolved in CH3OH at 60 °C to obtain complex Co1. Complex Co2, an asymmetric dinuclear compound, was obtained by simply replacing CH3OH with CH3CN as the solvent. The Co(II) ion in complex Co1 was coordinated by the N4O2 mode provided by two L ligands and two SCN- anions. The two Co(II) ions in Co2 were in the N2O4 and NO5 coordination environment and were linked by two μ2-OAc- bridges and one rare μ3-OAc- bridge. Weak interaction analysis revealed that complexes Co1 and Co2 exhibited 6-connected shp and 14-connected fcu nets, respectively. Magnetic studies showed that Co1 demonstrated single-ion magnet behavior under 2000 Oe. These behaviors are indicative of clearly field-induced single-ion magnetic behavior with U eff = 34.7(2) K and τ0 = 2.7(2) × 10-7 s under 2000 Oe dc field, respectively. By contrast, Co2 lacked frequency dependence under zero-field conditions. Electrospray ionization mass spectrometry indicated that two complexes were stable in N,N-dimethylformamide.
Collapse
Affiliation(s)
- Xiong-Feng Ma
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Hai-Ling Wang
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, P. R. China
| | - Zhong-Hong Zhu
- State
Key Laboratory for Chemistry and Molecular Engineering of Medicinal
Resources, School of Chemistry & Pharmacy
of Guangxi Normal University, Guilin 541004, 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 541004, P. R. China
| | - Bin Liu
- Hubei
Collaborative Innovation Center for Advanced Organic Chemical Materials,
Ministry of Education Key Laboratory for the Synthesis and Application
of Organic Functional Molecules, College of Chemistry and Chemical
Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Zhenxing Wang
- Wuhan
National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Zhong-Wen Ouyang
- Wuhan
National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan 430074, 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 541004, P. R. China
- Guangxi
Key Laboratory of Electrochemical and Magnetochemical Functional Materials,
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| |
Collapse
|
8
|
Yang J, Huang Y, Fang T, Qian K, Chen WB, Yu XF, Ai YC, Ye JL, Li XY. Synthesis, crystal structure, and magnetic properties of a multicage compound: [(Me)2EtNH][Mn(N3)3] with a perovskite-related structure. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2018-0183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A new multicage compound [(Me)2EtNH][Mn(N3)3] (Me = methyl, Et = ethyl) with a perovskite-related structure has been synthesized. The manganese(II) cations are bridged by end-to-end (EE) azide anions to form three-dimensional cages with the N,N-dimethylethylammonium cations residing in the cavities of the [Mn(N3)3]
n
n
− cages. The compound has been characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, second-harmonic generation, and magnetic measurements. The second-harmonic generation results support its noncentrosymmetric polar crystal structure. Magnetic susceptibility measurements show antiferromagnetic interactions among the MnII ions.
Collapse
Affiliation(s)
- Jie Yang
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Yuan Huang
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Ting Fang
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Kun Qian
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Wen-Bin Chen
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Xiu-Feng Yu
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Yi-Chun Ai
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Jia-Li Ye
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| | - Xiang-Yun Li
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , P.R. China
| |
Collapse
|
9
|
Kawamura A, Filatov AS, Anderson JS, Jeon IR. Slow Magnetic Relaxation of Co(II) Single Chains Embedded within Metal–Organic Superstructures. Inorg Chem 2019; 58:3764-3773. [DOI: 10.1021/acs.inorgchem.8b03347] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Airi Kawamura
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Alexander S. Filatov
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - John S. Anderson
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ie-Rang Jeon
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| |
Collapse
|
10
|
Kong JJ, Shao D, Zhang JC, Jiang YX, Ji CL, Huang XC. From mononuclear to two-dimensional cobalt(ii) complexes based on a mixed benzimidazole–dicarboxylate strategy: syntheses, structures, and magnetic properties. CrystEngComm 2019. [DOI: 10.1039/c8ce01931b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three cobalt(ii) complexes with diverse structure dimensions based on a mixed benzimidazole–dicarboxylate strategy have been synthesized hydrothermally and characterized structurally and magnetically.
Collapse
Affiliation(s)
- Jiao-Jiao Kong
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Dong Shao
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
| | - Jia-Chen Zhang
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Yu-Xuan Jiang
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Cheng-Long Ji
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Xing-Cai Huang
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| |
Collapse
|
11
|
Wei XQ, Wang KJ, Wu DQ, Shao D, Shi L, Shen FX, Wei HY, Wang XY. Two three-dimensional [Mo III(CN) 7] 4−-based magnets showing new topologies and ferrimagnetic ordering below 80 K. Dalton Trans 2019; 48:8843-8852. [DOI: 10.1039/c9dt01290g] [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
Two 3D [MoIII(CN)7]4−-based magnets with new topologies and ferrimagnetic ordering below 80 K have been prepared using different amides as auxiliary ligands.
Collapse
Affiliation(s)
- Xiao-Qin Wei
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Kang-Jie Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong-Qing Wu
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Le Shi
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| |
Collapse
|
12
|
Gao W, Liu F, Zhang XM, Liu JP, Gao QY. Slow relaxation and magnetic coupling of magnetization in 3D CoII2-xZnIIx chain-based coordination frameworks with mixed double azide-tetrazolate bridges. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.08.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
13
|
Vráblová A, Černák J, Rajnák C, Dlháň Ľ, Tomás M, Falvello LR, Boča R. Exceptionally slow magnetic relaxation in cobalt(ii) benzoate trihydrate. Dalton Trans 2018; 47:15523-15529. [PMID: 30338326 DOI: 10.1039/c8dt03610a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt(ii) benzoate trihydrate prepared by the reaction of CoCO3 with benzoic acid (HBz) in boiling water followed by crystallization has been structurally characterized as a chain-like system with the formula unit [Co(Bz)(H2O)2]Bz·H2O where the Co(ii) atoms are triply linked by one bridging syn-syn benzoato (Bz) and two aqua ligands; additional benzoate counter ions and solvate water molecules are present in the crystal structure. DC magnetic measurements reveal a sizable exchange coupling of a ferromagnetic nature between the Co(ii) atoms. At TN = 5.5 K the paramagnetic phase switches to the antiferromagnetic phase. Though the remnant magnetization is zero, the magnetization curve shows two lobes of a hysteresis loop and the DC relaxation experiments confirm a long relaxation time at T = 2.0 K. AC susceptibility data confirm a slow relaxation of magnetization even in the antiferromagnetic phase. In the absence of the magnetic field, two relaxation channels exist. The relaxation time for the low frequency channel is as slow as τLF > 1.6 s and data fitting yields τLF (2.1 K) = 14 s. The high-frequency relaxation time obeys the Orbach process at a higher temperature whereas the Raman process dominates the low-temperature region. Three slow relaxation channels are evidenced at the applied magnetic field BDC = 0.1 T.
Collapse
Affiliation(s)
- Anna Vráblová
- Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, 041 54 Košice, Slovakia. and Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Inorgánica, University of Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Juraj Černák
- Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, 041 54 Košice, Slovakia.
| | - Cyril Rajnák
- Department of Chemistry, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 91701 Trnava, Slovakia
| | - Ľubor Dlháň
- Institute of Inorganic Chemistry, FCHPT, Slovak University of Technology, 812 37 Bratislava, Slovakia
| | - Milagros Tomás
- Instituto de Síntesis Quimica y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, University of Zaragoza-CSIC, E-50009 Zaragoza, Spain.
| | - Larry R Falvello
- Instituto de Ciencia de Materiales de Aragón (ICMA), Departamento de Química Inorgánica, University of Zaragoza-CSIC, E-50009 Zaragoza, Spain
| | - Roman Boča
- Department of Chemistry, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 91701 Trnava, Slovakia
| |
Collapse
|
14
|
Rajnák C, Dlháň Ľ, Moncol J, Titiš J, Boča R. Slow magnetic relaxation in a μ 1,1'-azido cobalt(ii) methylquinoline chain complex. Dalton Trans 2018; 47:15745-15750. [PMID: 30346456 DOI: 10.1039/c8dt03351j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A [Co(N3)2(mqu)] complex with a 1D chain architecture (mqu - 4-methylquinoline) displays the paramagnetic behaviour with a slight exchange interaction of antiferromagnetic nature among Co(ii) centres. It shows slow magnetic relaxation with three distinct modes. The relaxation time strongly depends upon the applied external field. The slowest relaxation time refers to the low-frequency mode τLF = 1.6(2) s at BDC = 0.8 T and T = 1.9 K.
Collapse
Affiliation(s)
- Cyril Rajnák
- Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 91701 Trnava, Slovakia.
| | | | | | | | | |
Collapse
|
15
|
Nie MX, Wu QL, Zhao JP, Gao SH, Liu FC. Slow magnetic relaxations in azide or formate bridged chains based on dicubane-like 3d-4f clusters. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.06.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
16
|
Savard JM, Brunet G, Srinivasan A, Murugesu M, Brusso JL. Ferromagnetically coupled dinuclear M II complexes based on a boratriazine ligand framework. Dalton Trans 2018; 47:14875-14879. [PMID: 30280175 DOI: 10.1039/c8dt03145b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A boratriazine ligand, which incorporates attractive features from both bodipy and terpy, has been used to synthesize [Fe2II(μ1,1-N3)2(Py2F2BTA)2(N3)2] (1) and [Co2II(μ1,1-N3)2(Py2F2BTA)2(N3)2] (2). Both 1 and 2 feature a double end-on azido bridging motif, which promotes ferromagnetic interactions between the metal centres. Indeed, 1 represents the first report of a dinuclear FeII complex with this bridging mode exhibiting J = 5.7(9) cm-1 and D = -6.0(4) cm-1, while the isostructural Co analogue shows J = 7.1(9) cm-1 and D = 17.3(9) cm-1.
Collapse
Affiliation(s)
- Jamie M Savard
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
| | | | | | | | | |
Collapse
|
17
|
Drahoš B, Herchel R, Trávníček Z. Single-Chain Magnet Based on 1D Polymeric Azido-Bridged Seven-Coordinate Fe(II) Complex with a Pyridine-Based Macrocyclic Ligand. Inorg Chem 2018; 57:12718-12726. [DOI: 10.1021/acs.inorgchem.8b01798] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bohuslav Drahoš
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
| | - Radovan Herchel
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
| |
Collapse
|
18
|
Ma X, Liu Y, Song W, Wang Z, Liu X, Xie G, Chen S, Gao S. A difunctional azido-cobalt(ii) coordination polymer exhibiting slow magnetic relaxation behaviour and high-energy characteristics with good thermostability and insensitivity. Dalton Trans 2018; 47:12092-12104. [PMID: 30059100 DOI: 10.1039/c8dt02335b] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel one-dimensional azido-cobalt(ii) compound, [Co2(1-mbt)2(N3)4]n (1) (1-mbt = 1-((2-propyl-imidazol-1-yl)methyl)-benzo[1,2,3]triazole), was solvothermally synthesized. X-ray crystal structure analysis demonstrates that two crystallographically independent Co(ii) atoms in the asymmetrical unit of compound 1 exhibit a rectangular pyramid geometry. The 3D supermolecular network of 1 consists of well-isolated 1D metal chains in which the azido bridging ligands assume an unusual pattern of combination with the Co(ii) centre as the sign of [-EE-EO-EO-EO-]n. The various coordination modes of the azido anion are responsible for different magnetic exchanges between the adjacent Co(ii) ions. The end-to-end (EE) mode mediates the antiferromagnetic coupling, whereas the end-on (EO) manner contributes to the ferromagnetic interaction. Magneto-structural relationships are discussed with the aid of theoretical calculations which are employed to find the potential single-ion magnetic anisotropy and reproduce the observed magnetic coupling properly. Alternating current magnetic susceptibility measurements reveal that 1 features a typical behaviour of field-induced slow magnetic relaxation. Energetic characterization evidences that the resulting compound possesses satisfactory detonation properties, superior lack of sensitivity and thermostability owing to the high nitrogen content (N% = 40.10%) and a coherent intrachain configuration. The kinetic parameters of the exothermic processes for 1 are investigated by the Kissinger method and the Ozawa method. We note that 1 has potential application prospects as a new generation of environmentally friendly high-energy materials based on this nitrogen-rich and oxygen-free system. In addition, the compound is developed as a practical additive to promote the thermal decomposition of ammonium perchlorate (AP) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). The finding in this work highlights an example of effective development of advanced magneto-energetic materials.
Collapse
Affiliation(s)
- Xiaohui Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Wu Q, Meng YS, Jiang WJ, Jiao CQ, Liu Q, Zhu HL, Liu T. Syntheses, structures and magnetic properties of cyano-bridged Fe III 2 M II (M = Mn, Co and Ni) one-dimensional chains. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.05.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
20
|
Wang YQ, Wang K, Gao EQ. Mixed metal CoII1−xZnIIx–organic frameworks based on chains with mixed carboxylate and azide bridges: magnetic coupling and slow relaxation. RSC Adv 2018; 8:22046-22052. [PMID: 35541715 PMCID: PMC9081085 DOI: 10.1039/c8ra03273d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/03/2018] [Indexed: 11/25/2022] Open
Abstract
A series of isomorphous three-dimensional metal–organic frameworks [CoII1−xZnIIx(L)(N3)]·H2O (x = 0.26, 0.56 and 0.85) based on bimetallic CoII1−xZnIIx (x = 0.26, 0.56 and 0.85) chains with random metal sites have been synthesized and magnetically characterized. The CoII1−xZnIIx series, which intrinsically feature random anisotropic/diamagnetic sites, shows complex magnetic interactions. By gradually introducing the diamagnetic ZnII ions into the pure anisotropic CoII single-chain magnets system, the ferromagnetic interactions between CoII ions are gradually diluted. Moreover, the slow magnetic relaxation behaviour of the mixed metal CoII1−xZnIIx systems also changes. In this bimetallic series CoII1−xZnIIx, the Co-rich materials exhibit slow relaxation processes that may arise from SCM mechanism, while the ZnII-rich materials show significantly low slow magnetic relaxation. A general trend is that the activation energy and the blocking temperature decrease with the increase in diamagnetic ZnII content, emphasizing the importance of anisotropy for slow relaxation of magnetization. A series of mixed-metal systems consisting of CoII1−xZnIIx chains with (μ-COO)2(μ-EO-N3) bridges were prepared, exhibiting interesting magnetic coupling and slow magnetic relaxation.![]()
Collapse
Affiliation(s)
- Yan-Qin Wang
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Huhhot
- China
| | - Kun Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - En-Qing Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| |
Collapse
|
21
|
Lim KS, Song JH, Kang DW, Kang M, Eom S, Koh EK, Hong CS. Reversible crystal-to-amorphous structural transformations and magnetic variations in single end-on azide-bridged MII (M = Mn, Ni) coordination polymers. Dalton Trans 2018; 47:845-851. [DOI: 10.1039/c7dt03886k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Azide-bridged coordination polymers undergo reversible crystal-to-amorphous phase transformations during the hydration–dehydration process.
Collapse
Affiliation(s)
- Kwang Soo Lim
- Department of Chemistry
- Korea University
- Seoul 136-713
- Korea
| | - Jeong Hwa Song
- Department of Chemistry
- Korea University
- Seoul 136-713
- Korea
| | - Dong Won Kang
- Department of Chemistry
- Korea University
- Seoul 136-713
- Korea
| | - Minjung Kang
- Department of Chemistry
- Korea University
- Seoul 136-713
- Korea
| | - Sunhwi Eom
- Department of Chemistry
- Korea University
- Seoul 136-713
- Korea
| | - Eui Kwan Koh
- Nano-Bio System Research Team
- Korea Basic Science Institute
- Seoul 136-713
- Korea
| | | |
Collapse
|