101
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Wang JL, Liu Q, Lv XJ, Duan CY, Liu T. Thermal and light induced spin crossover in a mononuclear iron(II) complex. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.05.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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102
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Magott M, Stefańczyk O, Sieklucka B, Pinkowicz D. Octacyanidotungstate(IV) Coordination Chains Demonstrate a Light-Induced Excited Spin State Trapping Behavior and Magnetic Exchange Photoswitching. Angew Chem Int Ed Engl 2017; 56:13283-13287. [PMID: 28770580 DOI: 10.1002/anie.201703934] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 07/09/2017] [Indexed: 11/07/2022]
Abstract
A huge increase in the magnetization of two coordination chains based on tetravalent octacyanidometalates (WIV and MoIV ) is observed on irradiation with 436 nm light, while no such behavior is observed for the NbIV analogue. A photomagnetic response based solely on [WIV (CN)8 ]4- is demonstrated for the first time. The observed behavior is attributed to the light-induced excited spin state trapping (LIESST) effect at the octacyanidometalate, and to the resulting magnetic exchange ON/OFF photoswitching between the MnII center and the photoinduced high-spin (S=1) WIV or MoIV centers.
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Affiliation(s)
- Michał Magott
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Olaf Stefańczyk
- 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, Gronostajowa 2, 30-387 Kraków, Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
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103
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Magott M, Stefańczyk O, Sieklucka B, Pinkowicz D. Octacyanidotungstate(IV) Coordination Chains Demonstrate a Light-Induced Excited Spin State Trapping Behavior and Magnetic Exchange Photoswitching. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703934] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michał Magott
- Faculty of Chemistry; Jagiellonian University; Gronostajowa 2 30-387 Kraków Poland
| | - Olaf Stefańczyk
- 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; Gronostajowa 2 30-387 Kraków Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry; Jagiellonian University; Gronostajowa 2 30-387 Kraków Poland
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104
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Shao D, Deng L, Shi L, Wu D, Wei X, Yang S, Wang X. Slow Magnetic Relaxation and Spin‐Crossover Behavior in a Bicomponent Ion‐Pair Cobalt(II) Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700719] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Shao
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Lin‐Dan Deng
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Le Shi
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Dong‐Qing Wu
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Xiao‐Qin Wei
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Si‐Run Yang
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Xin‐Yi Wang
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
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105
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Wang JL, Liu Q, Meng YS, Zheng H, Zhu HL, Shi Q, Liu T. Synergic on/off Photoswitching Spin State and Magnetic Coupling between Spin Crossover Centers. Inorg Chem 2017; 56:10674-10680. [PMID: 28812903 DOI: 10.1021/acs.inorgchem.7b01633] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jun-Li Wang
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, 2 Linggong
Rd., 116024 Dalian, China
| | - Qiang Liu
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, 2 Linggong
Rd., 116024 Dalian, China
| | - Yin-Shan Meng
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, 2 Linggong
Rd., 116024 Dalian, China
| | - Hui Zheng
- Thermochemistry Laboratory, Liaoning Province
Key Laboratory of Thermochemistry for Energy and Materials, Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Hai-Lang Zhu
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, 2 Linggong
Rd., 116024 Dalian, China
| | - Quan Shi
- Thermochemistry Laboratory, Liaoning Province
Key Laboratory of Thermochemistry for Energy and Materials, Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Tao Liu
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, 2 Linggong
Rd., 116024 Dalian, China
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106
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Mondal AK, Jover J, Ruiz E, Konar S. Quantitative Estimation of Ising-Type Magnetic Anisotropy in a Family ofC3-Symmetric CoIIComplexes. Chemistry 2017; 23:12550-12558. [DOI: 10.1002/chem.201702108] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Amit Kumar Mondal
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri Bhopal 462066, MP India
| | - Jesús Jover
- Departament de Química Inorgànica I Orgànica; Secció de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional; Universitat de Barcelona; Diagonal 645 08028 Barcelona Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica I Orgànica; Secció de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional; Universitat de Barcelona; Diagonal 645 08028 Barcelona Spain
| | - 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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107
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Li GL, Wu SQ, Zhang LF, Wang Z, Ouyang ZW, Ni ZH, Su SQ, Yao ZS, Li JQ, Sato O. Field-Induced Slow Magnetic Relaxation in an Octacoordinated Fe(II) Complex with Pseudo-D2d Symmetry: Magnetic, HF-EPR, and Theoretical Investigations. Inorg Chem 2017; 56:8018-8025. [DOI: 10.1021/acs.inorgchem.7b00765] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guo-Ling Li
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
| | - Li-Fang Zhang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China
| | - Zhenxing Wang
- Wuhan National High Magnetic
Field Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic
Field Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Zhong-Hai Ni
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China
| | - Sheng-Qun Su
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
| | - Zi-Shuo Yao
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
| | - Jun-Qiu Li
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka Nishi-ku, 819-0395 Fukuoka, Japan
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108
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Mondal AK, Goswami T, Misra A, Konar S. Probing the Effects of Ligand Field and Coordination Geometry on Magnetic Anisotropy of Pentacoordinate Cobalt(II) Single-Ion Magnets. Inorg Chem 2017; 56:6870-6878. [PMID: 28561569 DOI: 10.1021/acs.inorgchem.7b00233] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this work, the effects of ligand field strength as well as the metal coordination geometry on magnetic anisotropy of pentacoordinated CoII complexes have been investigated using a combined experimental and theoretical approach. For that, a strategic design and synthesis of three pentacoordinate CoII complexes [Co(bbp)Cl2]·(MeOH) (1), [Co(bbp)Br2]·(MeOH) (2), and [Co(bbp)(NCS)2] (3) has been achieved by using the tridentate coordination environment of the ligand in conjunction with the accommodating terminal ligands (i.e., chloride, bromide, and thiocyanate). Detailed magnetic studies disclose the occurrence of slow magnetic relaxation behavior of CoII centers with an easy-plane magnetic anisotropy. A quantitative estimation of ZFS parameters has been successfully performed by density functional theory (DFT) calculations. Both the sign and magnitude of ZFS parameters are prophesied well by this DFT method. The theoretical results also reveal that the α → β (SOMO-SOMO) excitation contributes almost entirely to the total ZFS values for all complexes. It is worth noting that the excitation pertaining to the most positive contribution to the ZFS parameter is the dxy → dx2-y2 excitation for complexes 1 and 2, whereas for complex 3 it is the dz2 → dx2-y2 excitation.
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Affiliation(s)
- Amit Kumar Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India
| | - Tamal Goswami
- Department of Chemistry, University of North Bengal , Siliguri, Darjeeling 734013, West Bengal, India
| | - Anirban Misra
- Department of Chemistry, University of North Bengal , Siliguri, Darjeeling 734013, West Bengal, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India
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109
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Hu JX, Luo L, Lv XJ, Liu L, Liu Q, Yang YK, Duan CY, Luo Y, Liu T. Light-Induced Bidirectional Metal-to-Metal Charge Transfer in a Linear Fe2
Co Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703768] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ji-Xiang Hu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Lun Luo
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research; Chemistry Teaching and Research Section; School of Pharmacy; Hubei University of Medicine; 30 South Renmin Road 442000 Shiyan, Hubei China
| | - Xiao-Jin Lv
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Lei Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Yi-Kai Yang
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Chun-Ying Duan
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
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110
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Hu JX, Luo L, Lv XJ, Liu L, Liu Q, Yang YK, Duan CY, Luo Y, Liu T. Light-Induced Bidirectional Metal-to-Metal Charge Transfer in a Linear Fe2
Co Complex. Angew Chem Int Ed Engl 2017; 56:7663-7668. [DOI: 10.1002/anie.201703768] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/05/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Ji-Xiang Hu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Lun Luo
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research; Chemistry Teaching and Research Section; School of Pharmacy; Hubei University of Medicine; 30 South Renmin Road 442000 Shiyan, Hubei China
| | - Xiao-Jin Lv
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Lei Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Yi-Kai Yang
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Chun-Ying Duan
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Rd. 116024 Dalian China
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111
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Peng Y, Mereacre V, Anson CE, Zhang Y, Bodenstein T, Fink K, Powell AK. Field-Induced Co(II) Single-Ion Magnets with mer-Directing Ligands but Ambiguous Coordination Geometry. Inorg Chem 2017; 56:6056-6066. [PMID: 28485955 DOI: 10.1021/acs.inorgchem.6b02743] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three air-stable Co(II) mononuclear complexes with different aromatic substituents have been prepared and structurally characterized by single-crystal X-ray diffraction. The mononuclear complexes [Co(H2L1)2]·2THF (1), [Co(HL2)2] (2), and [Co(H2L3)2]·CH2Cl2 (3) (where H3L1, H2L2, and H3L3 represent 3-hydroxy-naphthalene-2-carboxylic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, nicotinic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, and 2-hydroxy-benzoic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, respectively) feature a distorted mer octahedral coordination geometry. Detailed magnetic studies of 1-3 have been conducted using direct and alternating current magnetic susceptibility data. Field-induced slow magnetic relaxation was observed for these three complexes. There are few examples of such behavior in (distorted) octahedral coordination geometry (OC) Co(II) mononuclear complexes with uniaxial anisotropy. Analysis of the six-coordinate Co(II) mononuclear single-ion magnets (SIMs) in the literature using the SHAPE program revealed that they all show what is best described as distorted trigonal prismatic (TRP) coordination geometry, and in general, these show negative D zero-field splitting (ZFS) values. On the other hand, all the Co(II) mononuclear complexes displaying what is best approximated as distorted octahedral (OC) coordination geometry show positive D values. In the new Co(II) mononuclear complexes we describe here, there is an ambiguity, since the rigid tridentate ligands confer what is best described for an octahedral complex as a mer coordination geometry, but the actual shape of the first coordination sphere is between octahedral and trigonal prismatic. The negative D values observed experimentally and supported by high-level electronic structure calculations are thus in line with a trigonal prismatic geometry. However, a consideration of the rhombicity as indicated by the E value of the ZFS in conjunction with the SHAPE analysis shows that in this case it is difficult to distinguish between the OC and TRP descriptions.
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology , Engesserstrasse 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology , Postfach 3640, 76021 Karlsruhe, Germany
| | - Valeriu Mereacre
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Yiquan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University , 210023 Nanjing, China
| | - Tilmann Bodenstein
- qLEAP Center fpr Theoretical Chemistry, Department of Chemistry, Aarhus University , Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology , Postfach 3640, 76021 Karlsruhe, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology , Engesserstrasse 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology , Postfach 3640, 76021 Karlsruhe, Germany
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112
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Molecular magnetism, quo vadis? A historical perspective from a coordination chemist viewpoint☆. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.004] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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113
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Bar AK, Gogoi N, Pichon C, Goli VMLDP, Thlijeni M, Duhayon C, Suaud N, Guihéry N, Barra AL, Ramasesha S, Sutter JP. Pentagonal Bipyramid Fe II Complexes: Robust Ising-Spin Units towards Heteropolynuclear Nanomagnets. Chemistry 2017; 23:4380-4396. [PMID: 28118518 DOI: 10.1002/chem.201605549] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Indexed: 11/07/2022]
Abstract
Pentagonal bipyramid FeII complexes have been investigated to evaluate their potential as Ising-spin building units for the preparation of heteropolynuclear complexes that are likely to behave as single-molecule magnets (SMMs). The considered monometallic complexes were prepared from the association of a divalent metal ion with pentadentate ligands that have a 2,6-diacetylpyridine bis(hydrazone) core (H2 LN3O2R ). Their magnetic anisotropy was established by magnetometry to reveal their zero-field splitting (ZFS) parameter D, which ranged between -4 and -13 cm-1 and was found to be modulated by the apical ligands (ROH versus Cl). The alteration of the D value by N-bound axial CN ligands, upon association with cyanometallates, was also assessed for heptacoordinated FeII as well as for related NiII and CoII derivatives. In all cases, N-coordinated cyanide ligands led to large magnetic anisotropy (i.e., -8 to -18 cm-1 for Fe and Ni, +33 cm-1 for Co). Ab initio calculations were performed on three FeII complexes, which enabled one to rationalize the role of the ligand on the nature and magnitude of the magnetic anisotropy. Starting from the pre-existing heptacoordinated complexes, a series of pentanuclear compounds were obtained by reactions with paramagnetic [W(CN)8 ]3- . Magnetic studies revealed the occurrence of ferromagnetic interactions between the spin carriers in all the heterometallic systems. Field-induced slow magnetic relaxation was observed for mononuclear FeII complexes (Ueff /kB up to 53 K (37 cm-1 ), τ0 =5×10-9 s), and SMM behavior was evidenced for a heteronuclear [Fe3 W2 ] derivative (Ueff /kB =35 K and τ0 =4.6 10-10 s), which confirmed that the parent complexes were robust Ising-type building units. High-field EPR spectroscopic investigation of the ZFS parameters for a Ni derivative is also reported.
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Affiliation(s)
- Arun Kumar Bar
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Nayanmoni Gogoi
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Céline Pichon
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - V M L Durga Prasad Goli
- Indian Institute of Science, Bangalore, 560012, India.,Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Mehrez Thlijeni
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Carine Duhayon
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique Quantiques, UMR5626, IRSAMC, Université de Toulouse 3, Paul Sabatier, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique Quantiques, UMR5626, IRSAMC, Université de Toulouse 3, Paul Sabatier, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses, UPR CNRS 3228, Université Grenoble Alpes, 25, Avenue des Martyrs, B.P. 166, 38042, Grenoble Cedex 9, France
| | - S Ramasesha
- Indian Institute of Science, Bangalore, 560012, India
| | - Jean-Pascal Sutter
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France
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114
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Urtizberea A, Roubeau O. Switchable slow relaxation of magnetization in the native low temperature phase of a cooperative spin-crossover compound. Chem Sci 2017; 8:2290-2295. [PMID: 28451331 PMCID: PMC5363372 DOI: 10.1039/c6sc04737h] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/09/2016] [Indexed: 12/20/2022] Open
Abstract
The implementation of single-molecule magnet properties in spin crossover materials is sought as a unique source of magnetic multistability at the molecular level. Examples however remain extremely scarce, in part due to the diamagnetic state of most Fe(ii) spin crossover materials at low temperatures. We have studied the complex [Fe(mtz)6](CF3SO3)2 (mtz = 1-methyltetrazole) as a tantalizing candidate of such coexistence, due to its known partial spin crossover and therefore paramagnetic native low temperature phase. The single-crystal structures of [Fe(mtz)6](CF3SO3)2 reported here allow rationalizing its peculiar cooperative spin-crossover behavior. Importantly, the high-spin Fe crystallographic sites at low temperature exhibit a high symmetry with a local trigonal distortion, usually source of magnetic anisotropy. The analysis of equilibrium magnetic properties confirm the presence of a significant magnetic anisotropy at the Fe(ii) high spin sites in the high symmetry low temperature phase. This results in field-induced slow relaxation of their magnetization which is dominated at low temperature by tunneling and direct processes and is strongly enhanced above 3 K by Raman and Orbach processes. Unprecedentedly, these single-molecule magnet properties are observed in the native ground state of a spin crossover material and efficiently and reversibly switched OFF through visible light irradiation.
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Affiliation(s)
- A Urtizberea
- Instituto de Ciencia de Materiales de Aragón (ICMA) , CSIC and Universidad de Zaragoza , Plaza San Francisco s/n , 50009 Zaragoza , Spain .
| | - O Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA) , CSIC and Universidad de Zaragoza , Plaza San Francisco s/n , 50009 Zaragoza , Spain .
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115
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Liu YM, Liu ZY, Yang EC, Zhao XJ. Field-induced slow relaxation of a manganese(III)-based single-ion magnet. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.01.030] [Citation(s) in RCA: 4] [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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116
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Switchable Multiple Spin States in the Kondo description of Doped Molecular Magnets. Sci Rep 2017; 7:42255. [PMID: 28176869 PMCID: PMC5296747 DOI: 10.1038/srep42255] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/04/2017] [Indexed: 12/21/2022] Open
Abstract
We show that introducing electrons in magnetic clusters and molecular magnets lead to rich phase diagrams with a variety of low-spin and high-spin states allowing for multiple switchability. The analysis is carried out for a quantum spin-fermion model using the exact diagonalization, and the cluster mean-field approach. The model is relevant for a number of molecular magnets with triangular motifs consisting of transition metal ions such as Cr, Cu and V. Re-entrant spin-state behavior and chirality on-off transitions exist over a wide parameter regime. A subtle competition among geometrical frustration effects, electron itinerancy, and Kondo coupling at the molecular level is highlighted. Our results demonstrate that electron doping provides a viable mean to tame the magnetic properties of molecular magnets towards potential technological applications.
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117
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Ding ZY, Meng YS, Xiao Y, Zhang YQ, Zhu YY, Gao S. Probing the influence of molecular symmetry on the magnetic anisotropy of octahedral cobalt(ii) complexes. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00547d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of field-induced cobalt(ii) SIMs exhibit varying axial zero-field splitting parameter D values from positive to negative with the increased distortion of the octahedral geometry.
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Affiliation(s)
- Zhong-Yu Ding
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yin-Shan Meng
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Yi Xiao
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
- State Key Laboratory of Fine Chemicals
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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118
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Wang LF, Qiu JZ, Chen YC, Liu JL, Li QW, Jia JH, Tong ML. [2 + 2] Photochemical modulation of the Dy(iii) single-molecule magnet: opposite influence on the energy barrier and relaxation time. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00221a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photochemical [2 + 2] reaction on a mononuclear Dy(iii) single-molecule magnet leads to the higher energy barrier after UV irradiation, along with the shorter magnetic relaxation time that is due to the acceleration of Raman process at low temperatures.
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Affiliation(s)
- Long-Fei Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Jiang-Zhen Qiu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Quan-Wen Li
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Jian-Hua Jia
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 510275 P. R. China
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119
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Chen L, Cui HH, Stavretis SE, Hunter SC, Zhang YQ, Chen XT, Sun YC, Wang Z, Song Y, Podlesnyak AA, Ouyang ZW, Xue ZL. Slow Magnetic Relaxations in Cobalt(II) Tetranitrate Complexes. Studies of Magnetic Anisotropy by Inelastic Neutron Scattering and High-Frequency and High-Field EPR Spectroscopy. Inorg Chem 2016; 55:12603-12617. [PMID: 27989182 DOI: 10.1021/acs.inorgchem.6b01544] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three mononuclear cobalt(II) tetranitrate complexes (A)2[Co(NO3)4] with different countercations, Ph4P+ (1), MePh3P+ (2), and Ph4As+ (3), have been synthesized and studied by X-ray single-crystal diffraction, magnetic measurements, inelastic neutron scattering (INS), high-frequency and high-field EPR (HF-EPR) spectroscopy, and theoretical calculations. The X-ray diffraction studies reveal that the structure of the tetranitrate cobalt anion varies with the countercation. 1 and 2 exhibit highly irregular seven-coordinate geometries, while the central Co(II) ion of 3 is in a distorted-dodecahedral configuration. The sole magnetic transition observed in the INS spectroscopy of 1-3 corresponds to the zero-field splitting (2(D2 + 3E2)1/2) from 22.5(2) cm-1 in 1 to 26.6(3) cm-1 in 2 and 11.1(5) cm-1 in 3. The positive sign of the D value, and hence the easy-plane magnetic anisotropy, was demonstrated for 1 by INS studies under magnetic fields and HF-EPR spectroscopy. The combined analyses of INS and HF-EPR data yield the D values as +10.90(3), +12.74(3), and +4.50(3) cm-1 for 1-3, respectively. Frequency- and temperature-dependent alternating-current magnetic susceptibility measurements reveal the slow magnetization relaxation in 1 and 2 at an applied dc field of 600 Oe, which is a characteristic of field-induced single-molecule magnets (SMMs). The electronic structures and the origin of magnetic anisotropy of 1-3 were revealed by calculations at the CASPT2/NEVPT2 level.
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Affiliation(s)
- Lei Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Hui-Hui Cui
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Shelby E Stavretis
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Seth C Hunter
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Yi-Chen Sun
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, People's Republic of China
| | - Andrey A Podlesnyak
- Quantum Condensed Matter Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
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120
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Shao D, Zhang SL, Shi L, Zhang YQ, Wang XY. Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets. Inorg Chem 2016; 55:10859-10869. [DOI: 10.1021/acs.inorgchem.6b00854] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- 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
| | - Shao-Liang Zhang
- State
Key Laboratory of Coordination Chemistry, Collaborative Innovation
Center of Advanced Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210023, China
| | - 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
| | - Yi-Quan Zhang
- Jiangsu
Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, 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 210023, China
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121
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Selvanathan P, Huang G, Guizouarn T, Roisnel T, Fernandez-Garcia G, Totti F, Le Guennic B, Calvez G, Bernot K, Norel L, Rigaut S. Highly Axial Magnetic Anisotropy in a N3O5Dysprosium(III) Coordination Environment Generated by a Merocyanine Ligand. Chemistry 2016; 22:15222-15226. [DOI: 10.1002/chem.201603439] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Pramila Selvanathan
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
| | - Gang Huang
- INSA; Institut des Sciences Chimiques de Rennes UMR 6226; 35708 Rennes France
| | - Thierry Guizouarn
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
| | - Thierry Roisnel
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
| | - Guglielmo Fernandez-Garcia
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
- Department of Chemistry “Ugo Schiff” and INSTM RU; University of Florence; 50019 Sesto Fiorentino Italy
| | - Federico Totti
- Department of Chemistry “Ugo Schiff” and INSTM RU; University of Florence; 50019 Sesto Fiorentino Italy
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
| | - Guillaume Calvez
- INSA; Institut des Sciences Chimiques de Rennes UMR 6226; 35708 Rennes France
| | - Kévin Bernot
- INSA; Institut des Sciences Chimiques de Rennes UMR 6226; 35708 Rennes France
| | - Lucie Norel
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
| | - Stéphane Rigaut
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS; Université de Rennes 1; 263 Avenue du Général Leclerc 35042 Rennes Cedex France
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122
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Milin E, Patinec V, Triki S, Bendeif EE, Pillet S, Marchivie M, Chastanet G, Boukheddaden K. Elastic Frustration Triggering Photoinduced Hidden Hysteresis and Multistability in a Two-Dimensional Photoswitchable Hofmann-Like Spin-Crossover Metal–Organic Framework. Inorg Chem 2016; 55:11652-11661. [DOI: 10.1021/acs.inorgchem.6b01081] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric Milin
- Chimie,
Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, CS 93837, 29285 Brest Cedex 3, France
| | - Véronique Patinec
- Chimie,
Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, CS 93837, 29285 Brest Cedex 3, France
| | - Smail Triki
- Chimie,
Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, CS 93837, 29285 Brest Cedex 3, France
| | - El-Eulmi Bendeif
- Institut
Jean Barriol, Université de Lorraine, CRM2, UMR CNRS 7036, B.P. 70239, F-54506 Vandoeuvre-lès-Nancy, France
| | - Sébastien Pillet
- Institut
Jean Barriol, Université de Lorraine, CRM2, UMR CNRS 7036, B.P. 70239, F-54506 Vandoeuvre-lès-Nancy, France
| | - Mathieu Marchivie
- Institut
de Chimie de la Matière Condensée de Bordeaux, Université de Bordeaux, 87 Av. Doc.
A. Schweitzer, F-33608 Pessac, France
| | - Guillaume Chastanet
- Institut
de Chimie de la Matière Condensée de Bordeaux, Université de Bordeaux, 87 Av. Doc.
A. Schweitzer, F-33608 Pessac, France
| | - Kamel Boukheddaden
- GEMaC, Université Paris-Saclay, CNRS, Université de Versailles Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
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123
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Mondal AK, Khatua S, Tomar K, Konar S. Field-Induced Single-Ion-Magnetic Behavior of Octahedral CoIIin a Two-Dimensional Coordination Polymer. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600569] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Amit Kumar Mondal
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal by-pass road 462066, MP Bhauri Bhopal India
| | - Sajal Khatua
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal by-pass road 462066, MP Bhauri Bhopal India
| | - Kapil Tomar
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal by-pass road 462066, MP Bhauri Bhopal India
| | - Sanjit Konar
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal by-pass road 462066, MP Bhauri Bhopal India
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124
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Frost JM, Harriman KLM, Murugesu M. The rise of 3-d single-ion magnets in molecular magnetism: towards materials from molecules? Chem Sci 2016; 7:2470-2491. [PMID: 28660017 PMCID: PMC5477015 DOI: 10.1039/c5sc03224e] [Citation(s) in RCA: 421] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/22/2015] [Indexed: 12/22/2022] Open
Abstract
Single-molecule magnets (SMMs) that contain one spin centre (so-called single-ion magnets) theoretically represent the smallest possible unit for spin-based electronic devices. The realisation of this and related technologies, depends on first being able to design systems with sufficiently large energy barriers to magnetisation reversal, Ueff, and secondly, on being able to organise these molecules into addressable arrays. In recent years, significant progress has been made towards the former goal - principally as a result of efforts which have been directed towards studying complexes based on highly anisotropic lanthanide ions, such as Tb(iii) and Dy(iii). Since 2013 however, and the remarkable report by Long and co-workers of a linear Fe(i) system exhibiting Ueff = 325 K, single-ion systems of transition metals have undergone something of a renaissance in the literature. Not only do they have important lessons to teach us about anisotropy and relaxation dynamics in the quest to enhance Ueff, the ability to create strongly coupled spin systems potentially offers access to a whole of host of 1, 2 and 3-dimensional materials with interesting structural and physical properties. This perspective summarises recent progress in this rapidly expanding sub-genre of molecular magnetism from the viewpoint of the synthetic chemist, with a particular focus on the lessons that have so far been learned from single-ion magnets of the d-block, and, the future research directions which we feel are likely to emerge in the coming years.
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Affiliation(s)
- Jamie M Frost
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ontario , Canada K1N 6N5 . ; ; Tel: +1 613-562-5800 ext. 2733
| | - Katie L M Harriman
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ontario , Canada K1N 6N5 . ; ; Tel: +1 613-562-5800 ext. 2733
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ontario , Canada K1N 6N5 . ; ; Tel: +1 613-562-5800 ext. 2733
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125
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Ziegenbalg S, Hornig D, Görls H, Plass W. Cobalt(II)-Based Single-Ion Magnets with Distorted Pseudotetrahedral [N2O2] Coordination: Experimental and Theoretical Investigations. Inorg Chem 2016; 55:4047-58. [DOI: 10.1021/acs.inorgchem.6b00373] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sven Ziegenbalg
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
| | - David Hornig
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
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126
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Photo-activation of Single Molecule Magnet Behavior in a Manganese-based Complex. Sci Rep 2016; 6:23785. [PMID: 27026506 PMCID: PMC4824451 DOI: 10.1038/srep23785] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/25/2016] [Indexed: 11/20/2022] Open
Abstract
A major roadblock to fully realizing molecular electronic devices is the ability to control the properties of each molecule in the device. Herein we report the control of the magnetic properties of single-molecule magnets (SMMs), which can be used in memory devices, by using a photo-isomerizable diarthylenthene ligand. Photo-isomerization of the diarylethene ligand bridging two manganese salen complexes with visible light caused a significant change in the SMM behavior due to opening of the six-membered ring of diarylethene ligand, accompanied by reorganization of the entire molecule. The ring-opening activated the frequency-dependent magnetization of the complex. Our results are a major step towards the realization of molecular memory devices composed of SMMs because the SMM behaviour can be turned on and off simply by irradiating the molecule.
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127
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Magnetic anisotropy in two- to eight-coordinated transition–metal complexes: Recent developments in molecular magnetism. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.06.013] [Citation(s) in RCA: 304] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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128
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Świtlicka-Olszewska A, Palion-Gazda J, Klemens T, Machura B, Vallejo J, Cano J, Lloret F, Julve M. Single-ion magnet behaviour in mononuclear and two-dimensional dicyanamide-containing cobalt(ii) complexes. Dalton Trans 2016; 45:10181-93. [DOI: 10.1039/c6dt01160h] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magneto-structural features of one mononuclear and two layered Co(ii) complexes being new examples of Single-Ion Magnets (SIMs) are reported.
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Affiliation(s)
| | - Joanna Palion-Gazda
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Tomasz Klemens
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Barbara Machura
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Julia Vallejo
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- València
- Spain
| | - Joan Cano
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- València
- Spain
- Fundació General de la Universitat de València (FGUV)
| | - Francesc Lloret
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- València
- Spain
| | - Miguel Julve
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- València
- Spain
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129
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130
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Pinkowicz D, Southerland HI, Avendaño C, Prosvirin A, Sanders C, Wernsdorfer W, Pedersen KS, Dreiser J, Clérac R, Nehrkorn J, Simeoni GG, Schnegg A, Holldack K, Dunbar KR. Cyanide Single-Molecule Magnets Exhibiting Solvent Dependent Reversible "On" and "Off" Exchange Bias Behavior. J Am Chem Soc 2015; 137:14406-22. [PMID: 26542645 DOI: 10.1021/jacs.5b09378] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The syntheses, structures, and magnetic properties of four new complex salts, (PPN){[Mn(III)(salphen)(MeOH)]2[M(III)(CN)6]}·7MeOH (Mn2M·7MeOH) (M = Fe, Ru, Os and Co; PPN(+) = bis(triphenylphosphoranylidene)ammonium cation; H2salphen = N,N'-bis(salicylidene)-1,2-diaminobenzene), and a mixed metal Co/Os analogue (PPN){[Mn(III)(salphen)(MeOH)]2[Co(III)0.92Os(III)0.08(CN)6]}·7MeOH were undertaken. It was found that all compounds exhibit switchable single-molecule magnet (SMM) and exchange-bias behavior depending on the interstitial methanol content. The pristine (PPN){[Mn(salphen)(MeOH)]2[Os(CN)6]}·7MeOH (Mn2Os·7MeOH) behaves as an SMM with an effective barrier for the magnetization reversal, (Ueff/kB), of 17.1 K. Upon desolvation, Mn2Os exhibits an increase of Ueff/kB to 42.0 K and an opening of the hysteresis loop observable at 1.8 K. Mn2Os·7MeOH shows also exchange-bias behavior with magnetic hysteresis loops exhibiting a shift in the quantum tunneling to 0.25 T from zero-field. The Fe(III) and Ru(III) analogues were prepared as reference compounds for assessing the effect of the 5d versus 4d and 3d metal ions on the SMM properties. These compounds are also SMMs and exhibit similar effects but with lower energy barriers. These findings underscore the importance of introducing heavy transition elements into SMMs to improve their slow relaxation of the magnetization properties. The (PPN){[Mn(III)(salphen)(MeOH)]2[Co(III)(CN)6]}·7MeOH (Mn2Co·7MeOH) analogue with a diamagnetic Co(III) central atom and the mixed Co/Os (PPN){[Mn(III)(salphen)(MeOH)]2[Co(III)0.92Os(III)0.08(CN)6]}·7MeOH (Mn2Co/Os·7MeOH) "magnetically diluted" system with a 9:1 Co/Os metal ratio were prepared in order to further probe the nature of the energy barrier increase upon desolvation of Mn2Os. In addition, inelastic neutron scattering and frequency-domain Fourier-transform THz electron paramagnetic resonance spectra obtained on Mn2Os·7MeOH and Mn2Os in combination with the magnetic data revealed the presence of anisotropic exchange interactions between Mn(III) and Os(III) ions.
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Affiliation(s)
- Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Kraków, Poland
| | - Heather I Southerland
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Carolina Avendaño
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Andrey Prosvirin
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Codi Sanders
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Wolfgang Wernsdorfer
- Institute Néel , CNRS, BP 166, 25 Avenue de Martyrs, Grenoble, 38042 Cedex 9, France
| | - Kasper S Pedersen
- Department of Chemistry, University of Copenhagen , Universitetsparken 5, DK-2100 Copenhagen, Denmark.,CNRS, CRPP, UPR 8641, F-33600 Pessac, France.,Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Jan Dreiser
- Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland and Swiss Light Source, Paul Scherrer Insitut , CH-5232 Villigen PSI, Switzerland
| | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France.,Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Joscha Nehrkorn
- Institut Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekulestr. 5, D-12489 Berlin, Germany.,Berlin Joint EPR Laboratory, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekulestr. 5, D-12489 Berlin, Germany
| | - Giovanna G Simeoni
- Heinz Meier-Leibnitz Zentrum (MLZ) and Physics Department, Technical University of Munich , Lichtenbergstr. 1, 85748 Garching, Germany
| | - Alexander Schnegg
- Institut Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekulestr. 5, D-12489 Berlin, Germany.,Berlin Joint EPR Laboratory, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekulestr. 5, D-12489 Berlin, Germany
| | - Karsten Holldack
- Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
| | - Kim R Dunbar
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
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131
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Nemec I, Marx R, Herchel R, Neugebauer P, van Slageren J, Trávníček Z. Field-induced slow relaxation of magnetization in a pentacoordinate Co(II) compound [Co(phen)(DMSO)Cl2]. Dalton Trans 2015; 44:15014-21. [PMID: 26229042 DOI: 10.1039/c5dt02162f] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The static and dynamic magnetic properties of a pentacoordinate [Co(phen)(DMSO)Cl2] compound (phen = 1,10'-phenanthroline, DMSO = dimethyl sulfoxide) were thoroughly studied by experimental (SQUID magnetometry and HF-EPR spectroscopy) and theoretical methods (DFT and CASSCF calculations). It has been found from temperature/field-dependent magnetization measurements that the studied compound possesses a large and negative magnetic anisotropy (D = -17(1) cm(-1)) with large rhombicity (E/D = 0.24(5)), and these experimental results are in agreement with ab initio calculations (D = -17.7 cm(-1), E/D = 0.31). Interdoublet resonances were not observed in the HF-EPR measurements, but the large rhombicity was confirmed (DEPR = -17.7 cm(-1) (fixed from CASSCF calculations), E/DEPR = 0.33). A frequency dependent out-of-phase susceptibility signal was observed only in a non-zero static magnetic field (B = 0.1 T) and the following parameters of slow-relaxation of magnetisation were derived from the experimental data: either the energy of spin reversal barrier, Ueff = 10.4 K, and the relaxation time, τ0 = 5.69 × 10(-9) s using the Debye model, or Ueff = 21.4-40.3 K and τ0 = 0.248-58.3 × 10(-9) based on a simplified model.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic.
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132
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Pinkowicz D, Rams M, Mišek M, Kamenev KV, Tomkowiak H, Katrusiak A, Sieklucka B. Enforcing Multifunctionality: A Pressure-Induced Spin-Crossover Photomagnet. J Am Chem Soc 2015; 137:8795-802. [PMID: 26098129 DOI: 10.1021/jacs.5b04303] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Photomagnetic compounds are usually achieved by assembling preorganized individual molecules into rationally designed molecular architectures via the bottom-up approach. Here we show that a magnetic response to light can also be enforced in a nonphotomagnetic compound by applying mechanical stress. The nonphotomagnetic cyano-bridged Fe(II)-Nb(IV) coordination polymer {[Fe(II)(pyrazole)4]2[Nb(IV)(CN)8]·4H2O}n (FeNb) has been subjected to high-pressure structural, magnetic and photomagnetic studies at low temperature, which revealed a wide spectrum of pressure-related functionalities including the light-induced magnetization. The multifunctionality of FeNb is compared with a simple structural and magnetic pressure response of its analog {[Mn(II)(pyrazole)4]2[Nb(IV)(CN)8]·4H2O}n (MnNb). The FeNb coordination polymer is the first pressure-induced spin-crossover photomagnet.
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Affiliation(s)
- Dawid Pinkowicz
- †Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland
| | - Michał Rams
- ‡Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Martin Mišek
- §School of Physics and Astronomy, Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.,∥Institute of Physics ASCR, v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic
| | - Konstantin V Kamenev
- ⊥School of Engineering, Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - Hanna Tomkowiak
- #Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
| | - Andrzej Katrusiak
- #Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
| | - Barbara Sieklucka
- †Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland
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133
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Abstract
One of the determining factors in whether single-molecule magnets (SMMs) may be used as the smallest component of data storage, is the size of the barrier to reversal of the magnetisation, Ueff. This physical quantity depends on the magnitude of the magnetic anisotropy of a complex and the size of its spin ground state. In recent years, there has been a growing focus on maximising the anisotropy generated for a single 3d transition metal (TM) ion, by an appropriate ligand field, as a means of achieving higher barriers. Because the magnetic properties of these compounds arise from a single ion in a ligand field, they are often referred to as single-ion magnets (SIMs). Here, the synthetic chemist has a significant role to play, both in the design of ligands to enforce propitious splitting of the 3d orbitals and in the judicious choice of TM ion. Since the publication of the first 3d-based SIM, which was based on Fe(ii), many other contributions have been made to this field, using different first row TM ions, and exploring varied coordination environments for the paramagnetic ions.
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Affiliation(s)
- Gavin A Craig
- WestCHEM, School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK.
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134
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Carl E, Demeshko S, Meyer F, Stalke D. Triimidosulfonates as Acute Bite-Angle Chelates: Slow Relaxation of the Magnetization in Zero Field and Hysteresis Loop of a CoIIComplex. Chemistry 2015; 21:10109-15. [DOI: 10.1002/chem.201406083] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Indexed: 11/07/2022]
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135
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Zhu YY, Zhang YQ, Yin TT, Gao C, Wang BW, Gao S. A Family of CoIICoIII3 Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation. Inorg Chem 2015; 54:5475-86. [DOI: 10.1021/acs.inorgchem.5b00526] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuan-Yuan Zhu
- School
of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yi-Quan Zhang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
- Jiangsu
Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Ting-Ting Yin
- School
of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China
| | - Chen Gao
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Bing-Wu Wang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Song Gao
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
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136
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137
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Gómez-Coca S, Aravena D, Morales R, Ruiz E. Large magnetic anisotropy in mononuclear metal complexes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.01.021] [Citation(s) in RCA: 241] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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138
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Poneti G, Poggini L, Mannini M, Cortigiani B, Sorace L, Otero E, Sainctavit P, Magnani A, Sessoli R, Dei A. Thermal and optical control of electronic states in a single layer of switchable paramagnetic molecules. Chem Sci 2015; 6:2268-2274. [PMID: 29308140 PMCID: PMC5645729 DOI: 10.1039/c5sc00163c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/12/2015] [Indexed: 11/21/2022] Open
Abstract
The control of the charge distribution in a monolayer of switchable cobalt-dioxolene complexes undergoing Valence Tautomerism (VT) has been achieved by means of thermal and optical stimuli. Thiol-derivatised VT molecules have been grafted on polycrystalline gold surface as monolayers from solution. X-ray photoelectron spectroscopy and time-of-flight secondary ions mass spectrometry evidenced the formation of a covalent bond between intact VT molecules and the surface and excluded the presence of physisorbed molecules. X-ray absorption spectroscopy revealed that the temperature- and light-induced conversion profiles of the monolayer closely reproduce the ones found for the crystalline phase. This study demonstrates that a wet chemistry based approach allows to transfer switchable paramagnetic molecules at the nanoscale, widening the playground to develop new hybrid molecular based architectures for novel technologies.
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Affiliation(s)
- Giordano Poneti
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
- "Guglielmo Marconi" University , Department of Applied Science and Technology , via Plinio 44 , 00193 Roma , Italy
| | - Lorenzo Poggini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Matteo Mannini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Brunetto Cortigiani
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Lorenzo Sorace
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Edwige Otero
- Synchrotron SOLEIL , BP 48 91192 Gif-Sur-Yvette , France
| | - Philippe Sainctavit
- Institut de Minéralogie , de Physique des Matériaux et de Cosmochimie , UMR7590 CNRS , Université Pierre et Marie Curie (Paris 6) , 4 place Jussieu , 75252 Paris , France
| | - Agnese Magnani
- University of Siena , Department of Biotechnologies , Chemistry and Pharmacy , INSTM Research Unit of Siena , Via A. Moro 2 , 53100 Siena , Italy
| | - Roberta Sessoli
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Andrea Dei
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
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139
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Scott HS, Ross TM, Phonsri W, Moubaraki B, Chastanet G, Létard J, Batten SR, Murray KS. Discrete Fe
II
Spin‐Crossover Complexes of 2,2′‐Dipyridylamino‐Substituted
s
‐Triazine Ligands with Phenoxo, Cyanophenoxo and Dibenzylamino Functionalities. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201402972] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hayley S. Scott
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Tamsyn M. Ross
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Wasinee Phonsri
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Boujemaa Moubaraki
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Guillaume Chastanet
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 Pessac, France
| | - Jean‐François Létard
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 Pessac, France
| | - Stuart R. Batten
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Keith S. Murray
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
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140
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Zhu YY, Liu CW, Yin J, Meng ZS, Yang Q, Wang J, Liu T, Gao S. Structural phase transition in a multi-induced mononuclear FeII spin-crossover complex. Dalton Trans 2015; 44:20906-12. [DOI: 10.1039/c5dt03216d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One mononuclear FeII complex displays a structural phase transition and a multi-induced spin-crossover behavior mediated by heat, light, pressure and solvent.
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Affiliation(s)
- Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Chang-Wei Liu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Ji Yin
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Zhao-Sha Meng
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Qian Yang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Junhu Wang
- Mössbauer Effect Data Center & Laboratory of Catalysts and New Materials for Aerospace
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- China
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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141
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Cosquer G, Breedlove BK, Yamashita M. Remote control of SMM behaviour via DTE ligands. Dalton Trans 2015; 44:2936-42. [DOI: 10.1039/c4dt02618g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein the use of DTE ligands to remotely control the magnetic properties of single-molecule magnets is discussed.
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Affiliation(s)
- Goulven Cosquer
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Brian K. Breedlove
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Yamashita
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
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142
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Abstract
Molecular magnetism draws from the fundamental ideas of structural chemistry and combines them with experimental physics resulting in one of the highest profile current topics, namely molecular materials that exhibit multifunctionality. Recent advances in the design of new generations of multifunctional molecular magnets that retain the functions of the building blocks and exhibit non-trivial magnetic properties at higher temperatures provide promising evidence that they may be useful for the future construction of nanoscale devices. This article is not a complete review but is rather an introduction into thefascinating world of multifunctional solids with magnetism as the leitmotif. We provide a subjective selection and discussion of the most inspiring examples of multifunctional molecular magnets: magnetic sponges, guest-responsive magnets, molecular magnets with ionic conductivity, photomagnets and non-centrosymmetric and chiral magnets.
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143
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Cao DK, Wei RH, Li XX, Gu YW. Multifunctional mononuclear bisthienylethene-cobalt(ii) complexes: structures, slow magnetic relaxation and photochromic behavior. Dalton Trans 2015; 44:5755-62. [DOI: 10.1039/c4dt04035j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on bisthienylethene ligands BrLH and PLH, multifunctional mononuclear complexes Co(BrL)2·3CH3OH (1) and Co(PL)2·2CH3OH (2) were synthesized, and they exhibited field-induced slow magnetic relaxation behavior and photochromic properties in CH2Cl2–CH3CN solution.
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Affiliation(s)
- Deng-Ke Cao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Ruo-Hong Wei
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Xiao-Xiong Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Yan-Wei Gu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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144
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Nemec I, Herchel R, Svoboda I, Boča R, Trávníček Z. Large and negative magnetic anisotropy in pentacoordinate mononuclear Ni(ii) Schiff base complexes. Dalton Trans 2015; 44:9551-60. [DOI: 10.1039/c5dt00600g] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pentacoordinate Ni(ii) complexes with pentadentate Schiff base ligands possess large and negative values of axial magnetic anisotropy. The relationship between the shape of the coordination polyhedron and uniaxial anisotropy is outlined.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Ingrid Svoboda
- Materials Science
- Darmstadt University of Technology
- Darmstadt
- Germany
| | - Roman Boča
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- 91701 Trnava
- Slovakia
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
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145
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Chen L, Chen SY, Sun YC, Guo YM, Yu L, Chen XT, Wang Z, Ouyang ZW, Song Y, Xue ZL. Slow magnetic relaxation in mononuclear seven-coordinate cobalt(ii) complexes with easy plane anisotropy. Dalton Trans 2015; 44:11482-90. [DOI: 10.1039/c5dt00785b] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear pentagonal bipyramid cobalt(ii) complexes with positive zero-field splitting D values were demonstrated to exhibit field-induced slow relaxation behaviour.
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Affiliation(s)
- Lei Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Shu-Yang Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Yi-Chen Sun
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Yu-Mei Guo
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Lu Yu
- High Magnetic Field Laboratory
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Z. W. Ouyang
- Wuhan National High Magnetic Field Center
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Zi-Ling Xue
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
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146
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Cosquer G, Morimoto M, Irie M, Fetoh A, Breedlove BK, Yamashita M. Photo-control of the magnetic properties of Dy(iii) and Ho(iii) homometal coordination polymers bridged by a diarylethene ligand. Dalton Trans 2015; 44:5996-6002. [DOI: 10.1039/c4dt03093a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional Dy(iii) and Ho(iii) homometal coordination polymers containing the DTE ligand were obtained, and the magnetic properties of the open and closed forms were investigated.
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Affiliation(s)
- Goulven Cosquer
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masakazu Morimoto
- Department of Chemistry and Research Center for Smart Molecules
- Rikkyo University
- Tokyo
- Japan
| | - Masahiro Irie
- Department of Chemistry and Research Center for Smart Molecules
- Rikkyo University
- Tokyo
- Japan
| | - Ahmed Fetoh
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Brian K. Breedlove
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Yamashita
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
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147
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Craig GA, Marbey JJ, Hill S, Roubeau O, Parsons S, Murrie M. Field-induced slow relaxation in a monometallic manganese(III) single-molecule magnet. Inorg Chem 2014; 54:13-5. [PMID: 25495825 DOI: 10.1021/ic5024136] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-field electron paramagnetic resonance spectroscopy shows that the structurally distorted Mn(III) ion in Na5[Mn(L-tart)2]·12H2O (1; L-tart = L-tartrate) has a significant negative axial zero-field splitting and a small rhombic anisotropy (∼1% of D). Alternating-current magnetic susceptibility measurements demonstrate that 1, which contains isolated Mn(III) centers, displays slow relaxation of its magnetization under an applied direct-current magnetic field.
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Affiliation(s)
- Gavin A Craig
- WestCHEM, School of Chemistry, University of Glasgow , Glasgow G12 8QQ, United Kingdom
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148
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Chen L, Wang J, Liu YZ, Song Y, Chen XT, Zhang YQ, Xue ZL. Slow Magnetic Relaxation in Mononuclear Octahedral Manganese(III) Complexes with Dibenzoylmethanide Ligands. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402964] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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149
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Huang XC, Zhou C, Shao D, Wang XY. Field-Induced Slow Magnetic Relaxation in Cobalt(II) Compounds with Pentagonal Bipyramid Geometry. Inorg Chem 2014; 53:12671-3. [DOI: 10.1021/ic502006s] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Xing-Cai Huang
- State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Chun Zhou
- State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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150
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Chen L, Wang J, Wei JM, Wernsdorfer W, Chen XT, Zhang YQ, Song Y, Xue ZL. Slow magnetic relaxation in a mononuclear eight-coordinate cobalt(II) complex. J Am Chem Soc 2014; 136:12213-6. [PMID: 25119268 DOI: 10.1021/ja5051605] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The quest for the single-molecular magnets (SMMs) based on mononuclear transition-metal complexes is focused on the low-coordinate species. No transition-metal complex with a coordination number of eight has been shown to exhibit SMM properties. Here the magnetic studies have been carried out for a mononuclear, eight-coordinate cobalt(II)-12-crown-4 (12C4) complex [Co(II)(12C4)2](I3)2(12C4) (1) with a large axial zero-field splitting. Magnetic measurements show field-induced, slow magnetic relaxation under an applied field of 500 Oe at low temperature. The magnetic relaxation time τ was fitted by the Arrhenius model to afford an energy barrier of Ueff = 17.0 cm(-1) and a preexponential factor of τ0 = 1.5 × 10(-6) s. The work here presents the first example of the eight-coordinate, mononuclear, 3d metal complex exhibiting the slow magnetic relaxation.
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Affiliation(s)
- Lei Chen
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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