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Maryunina K, Nigomedyanova D, Morozov V, Smirnova K, Letyagin G, Romanenko G, Efimov N, Bogomyakov A, Ovcharenko V. Ferrocenyl-substituted nitronyl nitroxide in the design of one-dimensional magnets. Dalton Trans 2024; 53:1714-1721. [PMID: 38167942 DOI: 10.1039/d3dt03858k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
By the reaction of M(hfac)2 (M = Mn(II), Co(II), Cu(II), and Zn(II); hfac is the hexafluoroacetylacetonate anion) and ferrocenyl-substituted nitronyl nitroxide (L), we succeeded in the synthesis of stable heterospin complexes: mononuclear [Zn(hfac)2L], trinuclear {[Cu(hfac)2]3L2} and chain polymer [Mn(hfac)2L]n and [Co(hfac)2L]n. The specific steric bulkiness of the ferrocenyl substituent leads to the formation of trans-type coordination polyhedra in the [Mn(hfac)2L]n and [Co(hfac)2L]n chains. The introduction of the ferrocene substituent leads to an effective weakening of intermolecular or interchain magnetic exchange coupling. Ferrimagnetic ordering was observed for one-dimensional complexes [M(hfac)2L]n (M = Mn(II), Co(II)). [Co(hfac)2L]n exhibits features of single-chain magnet behaviour: slow relaxation of magnetization below 13 K is associated with a high coercive field (54 kOe at 2 K).
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Affiliation(s)
- Kseniya Maryunina
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
- Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation
| | - Daria Nigomedyanova
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
- Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation
| | - Vitaly Morozov
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
| | - Kristina Smirnova
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
- Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation
| | - Gleb Letyagin
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
- Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation
| | - Galina Romanenko
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
| | - Nikolay Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, RAS, Leninskii Prospekt, 31, 119991 Moscow, Russia
| | - Artem Bogomyakov
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
- Novosibirsk State University, Pirogova Str., 1, 630090 Novosibirsk, Russian Federation
| | - Victor Ovcharenko
- International Tomography Center, SB RAS, Institutskaya Str., 3A, 630090 Novosibirsk, Russian Federation.
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Qasem KMA, Khan S, Fitta M, Akhtar MN, AlDamen MA, Shahid M, Saleh HAM, Ahmad M. A new {Cu3-Gd2} cluster as two-in-one functional material with unique topology acting as a refrigerant as well as adsorbent for cationic dye. CrystEngComm 2022. [DOI: 10.1039/d2ce00795a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new heterometallic cluster system, [Cu3Gd2(H3btp)2(OAc)6]3H2O {Cu3-Gd2} is designed by employing 1,3-Bis(tris(hydroxymethyl)methylamino)propane (H6btp) as a ligand. The cluster is characterized by FTIR, TGA, PXRD, SCXRD and topological analyses. The crystallography...
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Li H, Jing P, Lu J, Xi L, Wang Q, Ding L, Wang WM, Song Z. Multifunctional properties of {CuLn} systems involving nitrogen-rich nitronyl nitroxide: single-molecule magnet behavior, luminescence, magnetocaloric effects and heat capacity. Dalton Trans 2021; 50:2854-2863. [PMID: 33538274 DOI: 10.1039/d0dt04344c] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A series of nitrogen-rich nitronyl nitroxide radical PPNIT (1)-based (PPNIT = 2-(1-(pyrazin-2-yl)-1H-pyrazole)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) 3d-4f ring-shaped tetranuclear clusters [Ln2Cu2(hfac)10(PPNIT)2(H2O)2]·CHCl3 (LnIII = Gd 2, Tb 3, Dy 4; hfac = hexafiuoroacetylacetonate) with multifunctional properties were isolated. The magnetic behavior, luminescence and heat capacity of the 3d-4f complexes were investigated, displaying interesting multiple properties of the molecular materials. The Gd derivative shows a magnetocaloric effect with the maximum entropy change (-ΔSm) of 15.3 J kg-1 K-1 at 2 K for ΔH = 70 kOe. The Tb cluster exhibits spin glass behavior and the characteristic fluorescence emission of the TbIII ion, while the Dy cluster exhibits SMM behaviour, and the heat capacity has been investigated. Notably, in nitronyl nitroxide radical-metal systems, the investigation of diverse properties is still scarce so far. This work can pave the way towards the synthesis of multifunctional materials that combine SMM behavior, and optical or/and thermodynamic properties.
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Affiliation(s)
- Hongdao Li
- Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China. and Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Pei Jing
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Jiao Lu
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Lu Xi
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Qi Wang
- Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China.
| | - Lifeng Ding
- Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China.
| | - Wen-Min Wang
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Zhenjun Song
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China. and School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, China
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5
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Vaz MG, Andruh M. Molecule-based magnetic materials constructed from paramagnetic organic ligands and two different metal ions. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213611] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Miao H, Li HQ, Shen FX, Wei HY, Wang BL, Wang XY. A family of lanthanide complexes with a bis-tridentate nitronyl nitroxide radical: syntheses, structures and magnetic properties. Dalton Trans 2019; 48:10337-10345. [PMID: 31211300 DOI: 10.1039/c9dt01397k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eleven new lanthanide complexes based on a bis-tridentate nitronyl nitroxide radical NIT-Pm2Py (2-(4,6-di(pyridin-2-yl)pyrimidin-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy-3-oxide), namely (NIT-Pm2Py)Ln(hfac)3 (Ln = Gd (1Gd), Tb (2Tb), Dy (3Dy), Ho (4Ho), Er (5Er), Yb (6Yb)), [(NIT-Pm2Py)Ln2(hfac)6]·xH2O (Ln = Gd (7Gd), Tb (8Tb), Ho (10Ho), x = 0.5 for 7Gd and 1 for 8Tb and 10Ho) and (NIT-Pm2Py)Ln2(hfac)6 (Ln = Dy (9Dy), Er (11Er)) were prepared and characterized. These complexes can be selectively prepared by controlling the reaction ratio of Ln(hfac)3·2H2O to the radical ligand NIT-Pm2Py. Single crystal X-ray crystallographic analyses confirmed that 1Gd-6Yb are isostructural 2p-4f LnIII-radical complexes, in which the NIT-Pm2Py radical acts as a terminal tridentate ligand chelating to one LnIII ion. On the other hand, 7Gd-11Er are isostructural 4f-2p-4f LnIII-radical-LnIII complexes with the NIT-Pm2Py acting as a bridging ligand between two LnIII ions. 7Gd-11Er represent a rare family of complexes showing the NIT bridged 4f-2p-4f three-spin motif. Alternating-current (ac) magnetic susceptibility investigations revealed that complex 6Yb exhibits field-induced frequency dependence, suggesting a possible field-induced single-molecule magnet behavior. Ab initio calculations were performed on all these complexes. The fitting of the magnetic susceptibilities of these complexes indicates weak antiferromagnetic coupling between the LnIII and NIT radical.
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Affiliation(s)
- Hao Miao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
| | - Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China.
| | - Bao-Lin Wang
- 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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Shi JY, Chen PY, Wu MZ, Tian L, Liu ZY. Synthesis of a series of hetero-multi-spin Ln 2Cu 3 complexes based on a methyl-pyrazole nitronyl nitroxide radical with slow magnetic relaxation behaviors. Dalton Trans 2019; 48:9187-9193. [PMID: 31150027 DOI: 10.1039/c9dt00981g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multinuclear hetero-tri-spin complexes based on a methyl-pyrazole nitronyl nitroxide radical, namely, [Ln2Cu3(hfac)12(4-NIT-MePyz)4] (Ln = Gd(1), Tb(2), Dy(3); hfac = hexafluoroacetylacetone; 4-NIT-MePyz = 2-{4-(1-methyl)-pyrazolyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been successfully obtained through a one-pot reaction of the radical ligand (4-NIT-MePyz) with Cu(hfac)2 and Ln(hfac)3. These 2p-3d-4f complexes exhibit five-nuclear structures with the sequence [Cu-Rad-Ln-Rad-Cu-Rad-Ln-Rad-Cu], in which each 4-NIT-MePyz radical acting as a bidentate bridging ligand is coordinated to one Ln(hfac)3 unit through one oxygen atom of the NO groups and to one Cu(hfac)2 unit with one nitrogen atom from the pyrazole ring. For complex 1, based on the spin Hamiltonian calculations and MAGPACK program, it is concluded that there exist ferromagnetic couplings between GdIII and NIT radicals, as well as between CuII and free radicals with J1 = 6.8(1) and J3 = 1.3(2) cm-1, respectively, and antiferromagnetic interactions between radical and radical with J2 = -2.8(5) cm-1. Complex 2 shows frequency-dependent out-of-phase signals under a zero or 2000 Oe dc field indicating single-molecule magnetic behavior.
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Affiliation(s)
- Jian Yun Shi
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China.
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de Souza MS, Briganti M, Reis SG, Stinghen D, Bortolot CS, Cassaro RAA, Guedes GP, da Silva FC, Ferreira VF, Novak MA, Soriano S, Totti F, Vaz MGF. Magnetic Cationic Copper(II) Chains and a Mononuclear Cobalt(II) Complex Containing [Ln(hfac) 4] - Blocks as Counterions. Inorg Chem 2019; 58:1976-1987. [PMID: 30644737 DOI: 10.1021/acs.inorgchem.8b02929] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four new heterospin compounds with molecular formula {[Cu2(hfac)3(TlTrzNIT)2][Ln(hfac)4]} n·C7H16 (LnIII = Gd (1), Tb (2), or Dy (3)) and [Co(hfac)(TlTrzNIT)2][Dy(hfac)4] (4), where hfac is hexafluoroacetylacetonato and TlTrzNIT is the nitronylnitroxide radical 1-( m-tolyl)-1 H-1,2,3-triazole-4-(4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), were obtained. All structures were determined by single-crystal X-ray diffraction. In compounds 1-3, the TlTrzNIT radical is bridge-coordinated to copper(II) ions, leading to positively charged copper(II)-radical chains containing [Ln(hfac)4]- as counterions. In compound 4, the cobalt(II) ion is coordinated to two TlTrzNIT radicals and one hfac ligand in bidentate mode leading to a mononuclear cationic complex that contains [Dy(hfac)4]- as counterion. Magnetic measurements of all complexes were performed. Magnetic data were fit considering the contributions of the copper(II)-radical chain and a paramagnetic gadolinium(III) ion for 1. The sign and magnitude of the magnetic coupling constants extracted from the fit were confirmed by density functional theory calculations. The obtained spin topology shows an alternated ferro-antiferromagnetic chain. Field-induced single molecule magnet behavior was observed for the Dy derivatives 3 and 4, in agreement with CASSCF calculations performed for the latter system.
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Affiliation(s)
- Mateus S de Souza
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Matteo Briganti
- Department of Chemistry "Ugo Schiff" and INSTM RU University of Florence , 50019 Sesto Fiorentino , Italy
| | - Samira G Reis
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Danilo Stinghen
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Carolina S Bortolot
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Rafael A A Cassaro
- Instituto de Química , Universidade Federal do Rio de Janeiro , Rio de Janeiro , 21941-909 , Brazil
| | - Guilherme P Guedes
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Fernando C da Silva
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Vitor F Ferreira
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Miguel A Novak
- Instituto de Física , Universidade Federal do Rio de Janeiro , Rio de Janeiro , 21941-972 , Brazil
| | - Stéphane Soriano
- Instituto de Física , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-140 , Brazil
| | - Federico Totti
- Department of Chemistry "Ugo Schiff" and INSTM RU University of Florence , 50019 Sesto Fiorentino , Italy
| | - Maria G F Vaz
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
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9
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Meng X, Shi W, Cheng P. Magnetism in one-dimensional metal–nitronyl nitroxide radical system. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.02.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Sun J, Xi L, Xie J, Wang K, Li L, Sutter JP. A loop chain and a three-dimensional network assembled from a multi-dentate nitronyl nitroxide radical and M(hfac) 2 (M = Co II, Cu II). Dalton Trans 2018; 47:14630-14635. [PMID: 30276396 DOI: 10.1039/c8dt03222j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multi-dentate nitronyl nitroxide radical Nit-Ph-3,5-bIm (Nit-Ph-3,5-bIm = 2-[3,5-bis(1-imidazole)-phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) reacted with Co(hfac)2·2H2O or Cu(hfac)2 to yield two novel 3d-radical complexes {[Co(hfac)2]2(Nit-Ph-3,5-bIm)}n1 and {[Cu(hfac)2]7(Nit-Ph-3,5-bIm)3}n2 (hfac- = hexafluoroacetylacetonate). In both compounds, the Nit-Ph-3,5-bIm radical ligand behaves as a tetradentate ligand to link four M(hfac)2 units in a μ4-η1:η1:η1:η1-coordination mode via its two NO groups and two N atoms of imidazole, generating a unique loop chain for 1 and a three-dimensional framework for 2. The magnetic studies revealed a strong antiferromagnetic Co-ON exchange interaction in 1 while a ferromagnetic Cu-ON interaction is observed in 2. The dc magnetic behaviors of two complexes are analyzed by means of appropriate magnetic models. Furthermore, ac magnetic susceptibilities of the Co complex reveal slow relaxation of magnetization.
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Affiliation(s)
- Juan Sun
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry College of Chemistry, Nankai University, Tianjin 300071, China.
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Abstract
Achieving control over coordination geometries in lanthanide complexes remains a challenge to the coordination chemist. This is particularly the case in the field of molecule-based magnetism, where barriers for magnetic relaxation processes as well as tunneling pathways are strongly influenced by the lanthanide coordination geometry. Addressing the challenge of design of 4f-element coordination environments, the ubiquitous Ln(hfac)3 moieties have been shown to be applicable as Lewis acids coordinating transition metal acetylacetonates facially leading to simple, chiral lanthanide–transition metal heterodinuclear complexes. The broad scope of this approach is illustrated by the synthesis of a range of such complexes LnM: LnM(hfac)3(μ2-acac-O,O,O′)3 (Ln = La, Pr, Gd; M = Cr, Fe, Ga), with approximate three-fold symmetry. The complexes have been crystallographically characterized and exhibit polymorphism for some combinations of 4f and 3d metal centers. However, an isostructural set of systems spanning several lanthanides which exhibit spontaneous resolution in the orthorhombic Sohncke space group P212121 is presented here. The electronic structure and ensuing magnetic properties have been studied by EPR spectroscopy and magnetometry. The GdFe, PrFe, and PrCr complexes exhibit ferromagnetic coupling, while GdCr exhibits antiferromagnetic coupling. GdGa exhibits slow relaxation of the magnetization in applied static fields.
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Zhu M, Lou D, Deng X, Zhang L, Zhang W, Lü Y. A functional nitroxide ligand builds up two 2p–3d complexes with different spin ground states and a 2p–3d–4f chain of rings. CrystEngComm 2018. [DOI: 10.1039/c8ce00178b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Three new 2p–3d and 2p–3d–4f complexes derived from a functional nitroxide radical with different spin ground states and spin topologies have been synthesized.
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Affiliation(s)
- Mei Zhu
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Dingshuo Lou
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Xiaochun Deng
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Li Zhang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Wei Zhang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yaohong Lü
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
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Zhu M, Jia L, Li Y, Li Y, Zhang L, Zhang W, Lü Y. Nitronyl nitroxide bridged 3d–4f hetero-tri-spin chains: synthesis strategy, crystal structure and magnetic properties. CrystEngComm 2018. [DOI: 10.1039/c7ce01962a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three series of 2p–3d–4f one-dimensional chains based on different substituted nitronyl nitroxide ligands have been synthesized with two kinds of crystal structures.
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Affiliation(s)
- Mei Zhu
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Lingjie Jia
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yang Li
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yungai Li
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry
- Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Li Zhang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Wei Zhang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yaohong Lü
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
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14
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Yang M, Xie J, Sun Z, Li L, Sutter JP. Slow Magnetic Relaxation in Ladder-Type and Single-Strand 2p-3d-4f Heterotrispin Chains. Inorg Chem 2017; 56:13482-13490. [PMID: 28990764 DOI: 10.1021/acs.inorgchem.7b02204] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ladder-type and chain 2p-3d-4f complexes based on a bridging nitronyl nitroxide radical, namely, [LnCu(hfac)5(NIT-Ph-p-OCH2trz)]·0.5C6H14 [Ln = Y (1a), Dy (1b)] and [LnCu(hfac)5(NIT-Ph-p-OCH2trz)] [Ln = Y (2a), Dy (2b); NIT-Ph-p-OCH2trz = 2-[4-[(1H-1,2,4-triazol-1-yl)methoxy]phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate) have been successfully achieved through a one-pot reaction of the NIT-Ph-p-OCH2trz radical with Cu(hfac)2 and Ln(hfac)3·2H2O. Complexes 1a and 1b feature a ladder-like structure, where the rails are made of Ln(III) and Cu(II) ions alternatively bridged by nitronyl nitroxide and the triazole units while the NIT-Ph-p-OCH2trz moieties act as the rungs of the ladder. Complexes 2a and 2b consist of one-dimensional nitronyl nitroxide bridged Ln coordination polymers with dangly Cu(II) units connected to the triazole moieties. All of compounds exhibit ferromagnetic NIT-Dy and/or NIT-Cu interactions. Both Dy derivatives (1b and 2b) show frequency-dependent out-of-phase magnetic susceptibility signals in a zero field indicating slow magnetic relaxation behavior.
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Affiliation(s)
- Meng Yang
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
| | - Jing Xie
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
| | - Zan Sun
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
| | - Licun Li
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination (LCC), CNRS , 205 Route de Narbonne, F-31077 Toulouse, France.,LCC, Université de Toulouse, UPS, INPT , F-31077 Toulouse, France
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Wang J, Miao H, Xiao ZX, Zhou Y, Deng LD, Zhang YQ, Wang XY. Syntheses, structures and magnetic properties of the lanthanide complexes of the pyrimidyl-substituted nitronyl nitroxide radical. Dalton Trans 2017; 46:10452-10461. [PMID: 28748976 DOI: 10.1039/c7dt01037k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four 2p-4f LnIII-radical complexes, [(NIT-2-Pm)Ln(hfac)3]·0.5C7H16 (NIT-2-Pm = 2-pyrimidyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy-3-oxide, hfac = hexafluoroacetylacetonato, Ln = Tb (1), Dy (2), Ho (3) and Er (4)), and four 4f-2p-4f LnIII-radical-LnIII complexes, [(μ-NIT-2-Pm)Ln2(hfac)6(H2O)2]·0.5C7H16 (Ln = Tb (5), Dy (6), Ho (7) and Er (8)) have been synthesized and characterized structurally and magnetically. These compounds can be selectively obtained by controlling the reaction ratio of Ln(hfac)3·2H2O to the radical ligand NIT-2-Pm. The crystal structures show that in the former four complexes 1-4, the NIT-2-Pm radical acts as a terminal bidentate ligand chelating to one LnIII ion, while in 5-8, the NIT-2-Pm acts as a bridging ligand linking two LnIII ions to form a binuclear three-spin system. Magnetic studies revealed that complexes 1-4 and 6 show frequency-dependent ac magnetic susceptibilities, suggesting a possible single-molecule magnet behavior. To the best of our knowledge, complexes 3 and 4 are the first Ho-NIT and Er-NIT compounds showing slow magnetic relaxation. Compounds 5-8 represent a rare family of compounds showing the NIT bridged 4f-2p-4f three-spin motif, while complex 6 is a rare NIT bridged multinuclear lanthanide compound possessing SMM-like behaviour. Ab initio calculations were performed on all these complexes. The fitting of the magnetic susceptibilities of these compounds suggests weak antiferromagnetic coupling between the LnIII and NIT radical in 1-8 and weak ferromagnetic LnIII-LnIII interactions in 5-8.
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Affiliation(s)
- Jian 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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Li ZY, Zhang C, Zhai B, Han JC, Pei MC, Zhang JJ, Zhang FL, Li SZ, Cao GX. Linking heterometallic Cu–Ln chain units with a 2-methylenesuccinate bridge to form a 2D network exhibiting a large magnetocaloric effect. CrystEngComm 2017. [DOI: 10.1039/c7ce00356k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhang S, Cheng P. Coordination-Cluster-Based Molecular Magnetic Refrigerants. CHEM REC 2016; 16:2077-126. [PMID: 27381662 DOI: 10.1002/tcr.201600038] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Indexed: 02/03/2023]
Abstract
Coordination polymers serving as molecular magnetic refrigerants have been attracting great interest. In particular, coordination cluster compounds that demonstrate their apparent advantages on cryogenic magnetic refrigerants have attracted more attention in the last five years. Herein, we mainly focus on depicting aspects of syntheses, structures, and magnetothermal properties of coordination clusters that serve as magnetic refrigerants on account of the magnetocaloric effect. The documented molecular magnetic refrigerants are classified into two primary categories according to the types of metal centers, namely, homo- and heterometallic clusters. Every section is further divided into several subgroups based on the metal nuclearity and their dimensionalities, including discrete molecular clusters and those with extended structures constructed from molecular clusters. The objective is to present a rough overview of recent progress in coordination-cluster-based molecular magnetic refrigerants and provide a tutorial for researchers who are interested in the field.
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Affiliation(s)
- Shaowei Zhang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of the Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, P.R. China.,Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University, Tianjin, 300071, P.R. China
| | - Peng Cheng
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University, Tianjin, 300071, P.R. China.,Collaborative Innovation Center of Chemical Science and Engineering Nankai University, Tianjin, 300071, P.R. China
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Zhu M, Yang M, Wang J, Li H, Li L. Structural and Magnetic Properties of 2p-3d-4f Hetero-Tri-Spin Chains Comprising [{Cu(hfac)2-Radical}2] Dimers and Ln(hfac)3(hfac=hexafluoroacetylacetonate). Chem Asian J 2016; 11:1900-5. [DOI: 10.1002/asia.201600383] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Mei Zhu
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry; Nankai University; Tianjin 300071 China
| | - Meng Yang
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry; Nankai University; Tianjin 300071 China
| | - Juanjuan Wang
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry; Nankai University; Tianjin 300071 China
| | - Hongdao Li
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry; Nankai University; Tianjin 300071 China
| | - Licun Li
- Department of Chemistry; Key Laboratory of Advanced Energy Materials Chemistry; Nankai University; Tianjin 300071 China
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Abstract
The most up-to-date advances in the design and synthesis of molecular magnetic materials by means of a 2p–3d–4f strategy are reviewed.
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Affiliation(s)
- Mei Zhu
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry Nankai University
- Tianjin 300071
- China
- Department of Chemistry
| | - Licun Li
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry Nankai University
- Tianjin 300071
- China
| | - Jean-Pascal Sutter
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse
- France
- Université de Toulouse
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Yang M, Sun J, Guo J, Sun G, Li L. Cu–Ln compounds based on nitronyl nitroxide radicals: synthesis, structure, and magnetic and fluorescence properties. CrystEngComm 2016. [DOI: 10.1039/c6ce02049f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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