1
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Chen FL, Sun YC, Liu XL, Li G, Zhang CC, Gao BH, Zhao Y, Wang XY. Spin Crossover in [Fe(qsal-5-Br q) 2] + Complexes with a Quinoline-Substituted Qsal Ligand. Inorg Chem 2024; 63:8750-8763. [PMID: 38693869 DOI: 10.1021/acs.inorgchem.4c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Using a quinoline substituted Qsal ligand, Hqsal-5-Brq (Hqsal-5-Brq = N-(5-bromo-8-quinolyl)salicylaldimine), four FeIII complexes, [Fe(qsal-5-Brq)2]A·CH3OH (Y = NO3- (1NO3), BF4- (2BF4), PF6- (3PF6), OTf- (4OTf), were prepared and characterized. Structure analysis revealed that complex 2BF4 contained two species (2BF4(P1̅) and 2BF4(C2/c)). In these compounds except 3PF6, the [Fe(qsal-5-Brq)2]+ cations form 1D chains through π-π interactions and other weak interactions. Adjacent chains are connected to form the 2D "Chain Layer" structures and 3D structures through various supramolecular interactions. For 3PF6, a "Dimer Chain" structure is formed from the loosely connected dimers. Magnetic studies revealed that compounds 1NO3 and 2BF4(P1̅) displayed abrupt hysteretic SCO with the transition temperature T1/2↓ = 235 K, T1/2↑ = 240 K for 1NO3 and T1/2↓ = 230 K, T1/2↑ = 235 K for 2BF4(P1̅), while compounds 3PF6 and 4OTf are in the HS state. Desolvation of the complexes significantly modifies their SCO properties: the desolvated 1NO3 and 2BF4 show a gradual SCO, desolvated 3PF6 undergoes a two-step SCO, and desolvated 4OTf exhibits a hysteretic transition. Overall, this work reported the FeIII-SCO complexes of the quinoline-substituted Hqsal ligand and highlighted the potential of these ligands for the development of interesting FeIII-SCO materials.
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Affiliation(s)
- Feng-Li Chen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Li Liu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Gang Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Cheng-Cheng Zhang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Bo-Hong Gao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing 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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2
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Jeong AR, Park SR, Shin JW, Kim J, Tokunaga R, Hayami S, Min KS. Mononuclear Fe(III) complexes with 2,4-dichloro-6-((quinoline-8-ylimino)methyl)phenolate: synthesis, structure, and magnetic behavior. Dalton Trans 2024; 53:6809-6817. [PMID: 38545959 DOI: 10.1039/d3dt04385a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Three Fe(III)-based coordination complexes [Fe(dqmp)2](NO3)·H2O (1), [Fe(dqmp)2](BF4)·2CH3COCH3 (2), and [Fe(dqmp)2](ClO4) (3) were synthesized from Fe(NO3)3·9H2O/Fe(ClO4)3·xH2O, NaBF4, and 2,4-dichloro-6-((quinoline-8-ylimino)methyl)phenol (Hdqmp) in methanol/acetone and characterized. The structures of complexes 1-3 were determined via single-crystal X-ray crystallography at 100 K and room temperature, and their magnetic properties in the solid and solution forms were investigated. All complexes showed meridional structures with two tridentate dqmp- ligands coordinated with Fe(III) cations. In the solid state, complex 1 showed an abrupt and complete spin crossover at 225 K, whereas complexes 2 and 3 exhibited an incomplete spin crossover at 135 and 150 K, respectively. In a dimethylformamide solution, the complexes showed counterion-dependent spin transitions. In contrast to the solid state, in solution, complex 1 did not exhibit complete spin crossover. However, complexes 2 and 3 showed more complete spin transitions in solutions than in the solid state. The relaxation times, T1 and T2, for 1 and 2 were determined and both increased with temperature from 220 to 380 K. The T1 of 1 was larger than that of 2 at 380 K, and the T1 values were larger than the T2 values.
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Affiliation(s)
- Ah Rim Jeong
- Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Si Ra Park
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jong Won Shin
- Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jihyun Kim
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Ryuya Tokunaga
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Shinya Hayami
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kil Sik Min
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
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3
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Wu YY, Li ZY, Peng S, Zhang ZY, Cheng HM, Su H, Hou WQ, Yang FL, Wu SQ, Sato O, Dai JW, Li W, Bu XH. Two-Dimensional Spin-Crossover Molecular Solid Solutions with Tunable Transition Temperatures across 90 K. J Am Chem Soc 2024; 146:8206-8215. [PMID: 38412246 DOI: 10.1021/jacs.3c12905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Spin-crossover (SCO) materials exhibit remarkable potential as bistable switches in molecular devices. However, the spin transition temperatures (Tc) of known compounds are unable to cover the entire ambient temperature spectrum, largely limiting their practical utility. This study reports an exemplary two-dimensional SCO solid solution system, [FeIII(H0.5LCl)2-2x(H0.5LF)2x]·H2O (H0.5LX = 5-X-2-hydroxybenzylidene-hydrazinecarbothioamide, X = F or Cl, x = 0 to 1), in which the adjacent layers are adhered via hydrogen bonding. Notably, the Tc of this system can be fine-tuned across 90 K (227-316 K) in a linear manner by modulating the fraction x of the LF ligand. Elevating x results in strengthened hydrogen bonding between adjacent layers, which leads to enhanced intermolecular interactions between adjacent SCO molecules. Single-crystal diffraction analysis and periodic density functional theory calculations revealed that such a special kind of alteration in interlayer interactions strengthens the FeIIIN2O2S2 ligand field and corresponding SCO energy barrier, consequently resulting in increased Tc. This work provides a new pathway for tuning the Tc of SCO materials through delicate manipulation of molecular interactions, which could expand the application of bistable molecular solids to a much wider temperature regime.
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Affiliation(s)
- Ying-Ying Wu
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Zhao-Yang Li
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Shuang Peng
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Zi-Yi Zhang
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Hao-Ming Cheng
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Hang Su
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Wen-Qi Hou
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Feng-Lei Yang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jing-Wei Dai
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Wei Li
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
| | - Xian-He Bu
- School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin 300350, China
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4
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Díaz-Torres R, Gómez-Coca S, Ruiz E, Harding P, Harding DJ. Improving spin crossover characteristics in heteroleptic [Fe III(qsal-5-I)(qsal-5-OMe)]A complexes. Dalton Trans 2023. [PMID: 37908189 DOI: 10.1039/d3dt02503a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
A family of heteroleptic spin crossover (SCO) [FeIII(qsal-5-I)(qsal-5-OMe)]A·sol (qsal-5-X = 5-X-2-[(8-quinolylimino)methyl]phenolate; A = NO3-1 sol = 2MeOH, NCS-2 sol = 0.75MeOH·1.3H2O, BF4-3 sol = MeOH, OTf-4, sol = MeOH) complexes have been synthesized. Most of the complexes exhibit gradual SCO, with the exception of NCS, which is principally high spin. In contrast, the OTf complex shows an abrupt hysteretic SCO (35 K) after solvent loss. The magnetic properties of this complex are significantly improved in comparison to the related homoleptics, [Fe(qsal-I)2]OTf 5 (hysteresis, 8 K) and [Fe(qsal-5-OMe)2]OTf·CH2Cl26 (gradual SCO). Structural studies reveal that slight changes in the crystal packing cause stronger interactions improving the cooperativity. These findings are supported by DFT calculations using the r2SCAN functional in which the calculated structures show that SCO from the LS to the HS state causes pronounced scissoring of the 1D π-π chains and substantial changes in their relative orientation following loss of MeOH.
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Affiliation(s)
- Raúl Díaz-Torres
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Phimphaka Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
| | - David J Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
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5
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Kanetomo T, Yokoyama K, Suzuki Y, Ida H, Okazawa A, Enomoto M. Investigation of the unique magnetic behaviours of isomers in a 1,2-dithiooxalato-bridged diiron(II) complex. Dalton Trans 2023; 52:12496-12503. [PMID: 37603426 DOI: 10.1039/d3dt01992f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
1,2-Dithiooxalate (dto) can be employed as a bridging ligand and it exhibits symmetric (O,S-chelation) or asymmetric (O,O- and S,S-chelation) coordination forms. In this study, we prepared a novel dto-bridged diiron(II) complex, [{Fe(TPA)}2(μ-dto)](ClO4)2 (1), where TPA is tris(2-pyridylmethyl)amine. Interestingly, the bridging dto ligand exhibited not only the asymmetric form but also a linkage isomer and a diastereomer within the same crystal. Notably, the three isomers of 1 exhibited different magnetic properties, resulting in a multi-step spin crossover behaviour.
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Affiliation(s)
- Takuya Kanetomo
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Koki Yokoyama
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Yudai Suzuki
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Hiromichi Ida
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Atsushi Okazawa
- Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masaya Enomoto
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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6
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Díaz-Torres R, Chastanet G, Collet E, Trzop E, Harding P, Harding DJ. Bidirectional photoswitchability in an iron(iii) spin crossover complex: symmetry-breaking and solvent effects. Chem Sci 2023; 14:7185-7191. [PMID: 37416698 PMCID: PMC10321481 DOI: 10.1039/d3sc01495a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/31/2023] [Indexed: 07/08/2023] Open
Abstract
The impact of solvent on spin crossover (SCO) behaviour is reported in two solvates [Fe(qsal-I)2]NO3·2ROH (qsal-I = 4-iodo-2-[(8-quinolylimino)methyl]phenolate; R = Me 1 or Et 2) which undergo abrupt and gradual SCO, respectively. A symmetry-breaking phase transition due to spin-state ordering from a [HS] to [HS-LS] state occurs at 210 K in 1, while T1/2 = 250 K for the EtOH solvate, where complete SCO occurs. The MeOH solvate exhibits LIESST and reverse-LIESST from the [HS-LS] state, revealing a hidden [LS] state. Moreover, photocrystallographic studies on 1 at 10 K reveal re-entrant photoinduced phase transitions to a high symmetry [HS] phase when irradiated at 980 nm or a high symmetry [LS] phase after irradiation at 660 nm. This study represents the first example of bidirectional photoswitchability and subsequent symmetry-breaking from a [HS-LS] state in an iron(iii) SCO material.
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Affiliation(s)
- Raúl Díaz-Torres
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University Pathum Thani 12121 Thailand
| | - Guillaume Chastanet
- Université de Bordeaux, ICMCB 87 Avenue du Dr A. Schweitzer Pessac F-33608 France
| | - Eric Collet
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 F-35000 Rennes France
| | - Elzbieta Trzop
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 F-35000 Rennes France
| | - Phimphaka Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand
| | - David J Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand
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7
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Powell RE, Lees MR, Tizzard GJ, Coles SJ, Yuan Q, van Koningsbruggen PJ. Fe III in the high-spin state in dimethylammonium bis[3-ethoxysalicylaldehyde thiosemicarbazonato(2-)-κ 3O 2,N 1,S]ferrate(III). Acta Crystallogr C Struct Chem 2023; 79:18-24. [PMID: 36602017 PMCID: PMC9813924 DOI: 10.1107/s2053229622011597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022] Open
Abstract
The synthesis and crystal structure (100 K) of the title compound, [(CH3)2NH2][Fe(C10H11O2N3S)2], are reported. The asymmetric unit consists of an octahedral [FeIII(L)2]- fragment, where L2- is 3-ethoxysalicylaldehyde thiosemicarbazonate(2-), and a dimethylammonium cation. Each L2- ligand binds with the thiolate S, the imine N and the phenolate O atoms as donors, resulting in an FeIIIS2N2O2 chromophore. The ligands are orientated in two perpendicular planes, with the O and S atoms in cis positions, and mutually trans N atoms. The FeIII ion is in the high-spin state at 100 K. The variable-temperature magnetic susceptibility measurements (5-320 K) are consistent with the presence of a high-spin FeIII ion with D = 0.83 (1) cm-1 and g = 2.
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Affiliation(s)
- Robyn E. Powell
- College of Engineering and Physical Sciences, School of Infrastructure and Sustainable Engineering, Department of Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham, West Midlands, B4 7ET, United Kingdom
| | - Martin R. Lees
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Graham J. Tizzard
- National Crystallography Service, Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Simon J. Coles
- National Crystallography Service, Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Qingchun Yuan
- Energy and Bioproducts Research Institute, College of Engineering and Physical Sciences, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Petra J. van Koningsbruggen
- College of Engineering and Physical Sciences, School of Infrastructure and Sustainable Engineering, Department of Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham, West Midlands, B4 7ET, United Kingdom,Correspondence e-mail:
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8
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Kumar B, Paul A, Mondal DJ, Paliwal P, Konar S. Spin-State Modulation in Fe II -Based Hofmann-Type Coordination Polymers: From Molecules to Materials. CHEM REC 2022; 22:e202200135. [PMID: 35815939 DOI: 10.1002/tcr.202200135] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/21/2022] [Indexed: 11/05/2022]
Abstract
Spin crossover complexes that reversibly interconvert between two stable states imitate a binary state of 0 and 1, delivering a promising possibility to address the data processing concept in smart materials. Thus, a comprehensive understanding of the modulation of magnetic transition between high spin and low spin and the factors responsible for stabilizing the spin states is an essential theme in modern materials design. In this context, the present review attempts to provide a concise outline of the design strategy employed at the molecular level for fine-tuning the spin-state switching in FeII -based Hofmann-type coordination polymers and their effects on the optical and magnetic response. In addition, development towards the nanoscale architectures of HCPs, i. e., in terms of nanoparticles and thin films, are emphasized to bridge the gap between the laboratory and reality.
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Affiliation(s)
- Bhart Kumar
- Molecular Magnetism Lab, Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh, 462066, India
| | - Abhik Paul
- Molecular Magnetism Lab, Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh, 462066, India
| | - Dibya Jyoti Mondal
- Molecular Magnetism Lab, Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh, 462066, India
| | - Piyush Paliwal
- Molecular Magnetism Lab, Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh, 462066, India
| | - Sanjit Konar
- Molecular Magnetism Lab, Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh, 462066, India
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9
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Zhao XH, Shao D, Chen JT, Gan DX, Yang J, Zhang YZ. A trinuclear {FeIII2FeII} complex involving both spin and non-spin transitions exhibits three-step and wide thermal hysteresis. Sci China Chem 2022. [DOI: 10.1007/s11426-021-1153-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Jia S, Fan L, Zheng CY, Jin S, Li D. Mixed-valence {FeII2FeIII4} hexanuclear complexes with thermally induced Fe(III) spin crossover behavior. Dalton Trans 2022; 51:12968-12974. [DOI: 10.1039/d2dt02041f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyano-bridged mixed-valence {Fe6} hexanuclear complexes {[Tp4-MeFeII(CN)3]2[FeIII(Tpa)]2[FeIII(OR)(Tpa)]2}·6ClO4·S {Tp4-Me = tri(4-methyl-pyrazol-1-yl)borate, Tpa = Tris(2-pyridylmethyl)amine; R = -CH3 S = 8MeOH 1, R = -C2H5 S = 6EtOH 2 } have been obtained...
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11
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Díaz-Torres R, Boonprab T, Gómez-Coca S, Ruiz E, Chastanet G, Harding P, Harding DJ. Structural and theoretical insights into solvent effects in an iron(III) SCO complex. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01159j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alcohol effects in a series of iron(III) spin crossover complexes [Fe(qsal-Cl)2]NO3·ROH (R = Me 1, Et 2, 1-Pr 3) are explored. Despite the solvents differing from each other by only...
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12
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Powell RE, Lees MR, Tizzard GJ, Koningsbruggen PJV. Fe III in a high-spin state in bis(5-bromosalicylaldehyde 4-ethylthiosemicarbazonato-κ 3O,N 1,S)ferrate(III) nitrate monohydrate, the first example of such a cationic Fe III complex unit. Acta Crystallogr C 2022; 78:63-69. [PMID: 34982050 DOI: 10.1107/s2053229621013462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/20/2021] [Indexed: 11/10/2022] Open
Abstract
The synthesis and crystal structure (100 K) of the title compound, [Fe(C10H11BrN3OS)2]NO3·H2O, is reported. The asymmetric unit consists of an octahedral [FeIII(HL)2]+ cation, where HL- is H-5-Br-thsa-Et or 5-bromosalicylaldehyde 4-ethylthiosemicarbazonate(1-) {systematic name: 4-bromo-2-[(4-ethylthiosemicarbazidoidene)methyl]phenolate}, a nitrate anion and a noncoordinated water molecule. Each HL- ligand binds via the thione S, the imine N and the phenolate O atom, resulting in an FeIIIS2N2O2 chromophore. The ligands are orientated in two perpendicular planes, with the O and S atoms in cis and the N atoms in trans positions. This [Fe(HL)2](anion)·H2O compound contains the first known cationic FeIII entity containing two salicylaldehyde thiosemicarbazone derivatives. The FeIII ion is in the high-spin state at 100 K. In addition, a comparative IR spectroscopic study of the free ligand and the ferric complex is presented, demonstrating that such an analysis provides a quick identification of the degree of deprotonation and the coordination mode of the ligand in this class of metal compounds. The variable-temperature magnetic susceptibility measurements (5-320 K) are consistent with the presence of a high-spin FeIII ion with a zero-field splitting D = 0.439 (1) cm-1.
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Affiliation(s)
- Robyn E Powell
- College of Engineering and Physical Sciences, School of Infrastructure and Sustainable Engineering, Department of Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham, West Midlands, B4 7ET, UK
| | - Martin R Lees
- Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
| | - Graham J Tizzard
- National Crystallography Service, Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Petra J van Koningsbruggen
- College of Engineering and Physical Sciences, School of Infrastructure and Sustainable Engineering, Department of Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham, West Midlands, B4 7ET, UK
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13
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Elastic Modeling of Two-Step Transitions in Sterically Frustrated 1D Binuclear Spin-Crossover Chains. Symmetry (Basel) 2021. [DOI: 10.3390/sym13101836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Among the large family of spin-crossover materials, binuclear systems play an important role due to their specific molecular configurations, allowing the presence of multi-step transitions and elastic frustration. Although this issue benefited from a significant number of spin-based theories, there is almost no elastic description of the spin transition phenomenon in binuclear systems. To overcome this deficiency, in this work we develop the first elastic modeling of thermal properties of binuclear spin-crossover solids. At this end, we investigated a finite spin-crossover open chain constituted of elastically coupled binuclear (A = B) blocks, ⋯A=B−A=B−A=B⋯, in which the considered equivalent A and B sites may occupy two configurations, namely low-spin (LS) and high-spin (HS) states. The sites of the binuclear unit interact via an intramolecular spring and couple to the neighboring binuclear units via other springs. The model also includes the change of length inside and between the binuclear units subsequent to the spin state changes. When injecting an elastic frustration inside the binuclear unit in the LS state, competing interactions between the intra- and the inter-binuclear couplings emerge. The latter shows that according to the intra- and inter-binuclear elastic constants and the strength of the frustration, multi-step transitions are derived, for which a specific self-organization of type (HS = HS)-(LS-LS)-(HS = HS)⋯ is revealed and discussed. Finally, we have also studied the relaxation of the metastable photoinduced HS states at low temperature, in which two relaxation regimes with transient self-organized states were identified when monitoring the elastic frustration rate or the ratio of intra- and intermolecular elastic interactions. These behaviors are reminiscent of the thermal dependence of the order parameters of the system. The present model opens several possibilities of extensions of elastic frustrations acting in polynuclear spin-crossover systems, which may lead to other types of spin-state self-organizations and relaxation dynamics.
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Berdiell IC, Kulmaczewski R, Shahid N, Cespedes O, Halcrow MA. The number and shape of lattice solvent molecules controls spin-crossover in an isomorphous series of crystalline solvate salts. Chem Commun (Camb) 2021; 57:6566-6569. [PMID: 34113938 DOI: 10.1039/d1cc02624k] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystals of [FeL2][BF4]2·nMeCN (L = N-(2,6-di{pyrazol-1-yl}pyrid-4-yl)acetamide; n = 1 or 2) and [FeL2][ClO4]2·MeCN are isomorphous. When n = 1 the compounds exhibit an abrupt, hysteretic spin-transition below 200 K, but when n = 2 the material remains high-spin on cooling. [FeL2]X2·EtCN (X- = BF4- or ClO4-) are isomorphous with the MeCN solvates and undergo their spin-transition at almost the same temperature. However this now occurs in two-steps via a re-entrant mixed-spin intermediate phase, which correlates with crystallographic ordering of the bent propionitrile molecule.
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Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK. and Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1527, Heraklion GR-711 10, Greece
| | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
| | - Namrah Shahid
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
| | - Oscar Cespedes
- School of Physics and Astronomy, University of Leeds, EC Stoner Building, Leeds LS2 9JT, UK
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
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15
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Ghosh S, Bagchi S, Kamilya S, Mondal A. Effect of ligand substituents and tuning the spin-state switching in manganese(iii) complexes. Dalton Trans 2021; 50:4634-4642. [PMID: 33720257 DOI: 10.1039/d1dt00284h] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Three mononuclear manganese(iii) complexes based on flexible hexadentate ligands obtained from the condensation of N,N'-bis(3-aminopropyl)ethylenediamine and salicylaldehyde or salicylaldehyde with substitutions at the 5 or 3,5 positions, namely [Mn(X-sal2-323)](BPh4) (X = 5 H, 1; X = 5 Br, 2, and X = 3,5 Br, 3) have been synthesized. The impact of ligand substituents has been studied by variable temperature single-crystal X-ray diffraction analyses, and magnetic, spectroscopic and electrochemical investigations. The complexes have an analogous monocationic MnN4O2 surrounding offered by the flexible hexadentate ligand in a distorted octahedral geometry. Complex 1 remains in the high spin state over the entire temperature range, while complex 2 shows a reversible and complete two-step thermo-induced spin-state switching. An incomplete spin-state switching from a high spin to an intermediate high-spin low-spin (1 : 1) state was observed for complex 3. Single-crystal X-ray structural studies show the presence of three different spin states in 2 during the occurrence of the spin-state switching process. Electrochemical investigations showed that the reduced state of manganese(iii) centers in 3 is easily accessible in comparison to complexes 1 and 2.
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Affiliation(s)
- Subrata Ghosh
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
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16
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Wang RG, Meng YS, Gao FF, Gao WQ, Liu CH, Li A, Liu T, Zhu YY. Ligand symmetry significantly affects spin crossover behaviour in isomeric [Fe(pybox) 2] 2+ complexes. Dalton Trans 2021; 50:3369-3378. [PMID: 33595584 DOI: 10.1039/d0dt03978k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The understanding of the correlation between the spin-state behaviour and the structural features in transition-metal complexes is of pronounced importance to the design of spin crossover compounds with high performance. However, the study of the influence of ligand symmetry on the spin crossover properties is still limited due to the shortage of suitable structural systems. Herein we report the magneto-structural correlations of three mononuclear Fe(ii) isomers with respect to their ligand symmetry. In this work, two phenyl-substituted meso and optically pure pybox ligands were employed to construct meso (1), optically pure (2), and racemic (3) ligand types of [Fe(pybox)2]2+ complexes. Their magnetic susceptibilities were measured via temperature-dependent paramagnetic 1H NMR spectroscopy. We fitted the midpoint temperatures of the transition (T1/2) of 260 K for 1(ClO4), 247 K for 2(ClO4), and 281 K for 3(ClO4). The influence of structural symmetry on spin crossover was rationalized through density functional theory calculations. The optimized structures of [Fe(pybox)2]2+ complex cations show that the geometric distortion of the central FeN6 coordination sphere is mainly caused by the steric congestions between adjacent phenyl substituents. In these compounds, there is a distinct correlation that more steric congestions produce larger coordination distortion and favor the electron configuration in the high-spin state, which reflects in the increase of T1/2. Additionally, the influence of the counter anion and lattice solvent on the meso series compounds was inspected. It is revealed that multiple factors dominate the spin-state behaviour in the solid state. This work provides deep insight into the effect of ligand symmetry on the spin transition behaviour in spin crossover compounds. It demonstrates that molecular symmetry should be considered in the design of spin crossover compounds.
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Affiliation(s)
- Run-Guo Wang
- School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, China.
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17
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Gebretsadik T, Yang Q, Wu J, Tang J. Hydrazone based spin crossover complexes: Behind the extra flexibility of the hydrazone moiety to switch the spin state. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213666] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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18
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Kulmaczewski R, Bamiduro F, Shahid N, Cespedes O, Halcrow MA. Structural Transformations and Spin-Crossover in [FeL 2 ] 2+ Salts (L=4-{tert-Butylsulfanyl}-2,6-di{pyrazol-1-yl}pyridine): The Influence of Bulky Ligand Substituents. Chemistry 2021; 27:2082-2092. [PMID: 33073890 DOI: 10.1002/chem.202004072] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/16/2020] [Indexed: 11/06/2022]
Abstract
4-(tert-Butylsulfanyl)-2,6-di(pyrazol-1-yl)pyridine (L) was obtained in low yield from a one-pot reaction of 2,4,6-trifluoropyridine with 2-methylpropane-2-thiolate and sodium pyrazolate in a 1:1:2 ratio. The materials [FeL2 ][BF4 ]2 ⋅solv (1[BF4 ]2 ⋅solv) and [FeL2 ][ClO4 ]2 ⋅solv (1[ClO4 ]2 ⋅solv; solv=MeNO2 , MeCN or Me2 CO) exhibit a variety of structures and spin-state behaviors including thermal spin-crossover (SCO). Solvent loss on heating 1[BF4 ]2 ⋅x MeNO2 (x≈2.3) occurs in two steps. The intermediate phase exhibits hysteretic SCO around 250 K, involving a "reverse-SCO" step in its warming cycle at a scan rate of 5 K min-1 . The reverse-SCO is not observed in a slower 1 K min-1 measurement, however, confirming its kinetic nature. The final product [FeL2 ][BF4 ]2 ⋅0.75 MeNO2 was crystallographically characterized, and shows abrupt but incomplete SCO at 172 K which correlates with disorder of an L ligand. The asymmetric unit of 1[BF4 ]2 ⋅y Me2 CO (y≈1.6) contains five unique complex molecules, four of which undergo gradual SCO in at least two discrete steps. Low-spin 1[ClO4 ]2 ⋅0.5 Me2 CO is not isostructural with its BF4 - congener, and undergoes single-crystal-to-single-crystal solvent loss with a tripling of the crystallographic unit cell volume, while retaining the P 1 ‾ space group. Three other solvate salts undergo gradual thermal SCO. Two of these are isomorphous at room temperature, but transform to different low-temperature phases when the materials are fully low-spin.
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Affiliation(s)
- Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Faith Bamiduro
- School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Namrah Shahid
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Oscar Cespedes
- School of Physics and Astronomy, University of Leeds, E. C. Stoner Building, Leeds, LS2 9JT, UK
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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19
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Jornet-Mollá V, Giménez-Saiz C, Cañadillas-Delgado L, Yufit DS, Howard JAK, Romero FM. Interplay between spin crossover and proton migration along short strong hydrogen bonds. Chem Sci 2020; 12:1038-1053. [PMID: 34163870 PMCID: PMC8179063 DOI: 10.1039/d0sc04918b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 11/16/2020] [Indexed: 12/19/2022] Open
Abstract
The iron(ii) salt [Fe(bpp)2](isonicNO)2·HisonicNO·5H2O (1) (bpp = 2,6-bis(pyrazol-3-yl)pyridine; isonicNO = isonicotinate N-oxide anion) undergoes a partial spin crossover (SCO) with symmetry breaking at T 1 = 167 K to a mixed-spin phase (50% high-spin (HS), 50% low-spin (LS)) that is metastable below T 2 = 116 K. Annealing the compound at lower temperatures results in a 100% LS phase that differs from the initial HS phase in the formation of a hydrogen bond (HB) between two water molecules (O4W and O5W) of crystallisation. Neutron crystallography experiments have also evidenced a proton displacement inside a short strong hydrogen bond (SSHB) between two isonicNO anions. Both phenomena can also be detected in the mixed-spin phase. 1 undergoes a light-induced excited-state spin trapping (LIESST) of the 100% HS phase, with breaking of the O4W⋯O5W HB and the onset of proton static disorder in the SSHB, indicating the presence of a light-induced activation energy barrier for proton motion. This excited state shows a stepped relaxation at T 1(LIESST) = 68 K and T 2(LIESST) = 76 K. Photocrystallography measurements after the first relaxation step reveal a single Fe site with an intermediate geometry, resulting from the random distribution of the HS and LS sites throughout the lattice.
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Affiliation(s)
- Verónica Jornet-Mollá
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
| | | | - Dmitry S Yufit
- Department of Chemistry, Durham University Durham DH1 3LE UK
| | | | - Francisco M Romero
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
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20
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Ghosh S, Bagchi S, Das M, Kamilya S, Mondal A. Stepwise spin-state switching in a manganese(III) complex. Dalton Trans 2020; 49:14776-14780. [PMID: 33078798 DOI: 10.1039/d0dt02746d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear manganese(iii) complex containing a flexible hexadentate chelating ligand has been prepared and characterized by performing, at various temperatures, single-crystal X-ray diffraction analyses and magnetic, spectroscopic, and electrochemical studies. The complex was shown to consist of an MnN4O2 octahedral coordination environment, and to exhibit reversible two-step thermally induced spin-state switching, a gradual one at 168 K and an abrupt one at 103 K. Structural analyses revealed the existence of three spin-states, namely high-spin, low-spin, and intermediate states, during the spin-state switching process. Electrochemistry studies showed the quasi-reversible reduction and oxidation of the manganese(iii) center with a comparatively easily accessible reduced state.
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Affiliation(s)
- Subrata Ghosh
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
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21
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Chen YC, Meng Y, Dong YJ, Song XW, Huang GZ, Zhang CL, Ni ZP, Navařík J, Malina O, Zbořil R, Tong ML. Light- and temperature-assisted spin state annealing: accessing the hidden multistability. Chem Sci 2020; 11:3281-3289. [PMID: 34122835 PMCID: PMC8156335 DOI: 10.1039/c9sc05971g] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Among responsive multistable materials, spin crossover (SCO) systems are of particular interest for stabilizing multiple spin states with various stimulus inputs and physical outputs. Here, in a 2D Hofmann-type coordination polymer, [Fe(isoq)2{Au(CN)2}2] (isoq = isoquinoline), a medium-temperature annealing process is introduced after light/temperature stimulation, which accesses the hidden multistability of the spin state. With the combined effort of magnetic, crystallographic and Mössbauer spectral investigation, these distinct spin states are identified and the light- and temperature-assisted transition pathways are clarified. Such excitation-relaxation and trapping-relaxation joint mechanisms, as ingenious interplays between the kinetic and thermodynamic effects, uncover hidden possibilities for the discovery of multistable materials and the development of multistate intelligent devices. Two new two-stage manipulation protocols, namely light- and temperature-assisted spin state annealing (LASSA/TASSA), are applied to a spin crossover coordination polymer, [Fe(isoq)2{Au(CN)2}2], revealing the hidden multistability of spin states.![]()
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Affiliation(s)
- 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
| | - Yan Meng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China .,Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes, Anqing Normal University Anqing 246011 P. R. China
| | - Yan-Jie Dong
- Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes, Anqing Normal University Anqing 246011 P. R. China
| | - Xiao-Wei Song
- Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes, Anqing Normal University Anqing 246011 P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Chuan-Lei Zhang
- Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes, Anqing Normal University Anqing 246011 P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Jakub Navařík
- Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc Šlechtitelů 27 783 71 Olomouc Czech Republic
| | - Ondřej Malina
- Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc Šlechtitelů 27 783 71 Olomouc Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc Šlechtitelů 27 783 71 Olomouc Czech Republic
| | - 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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22
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Cruddas J, Powell BJ. Structure–property relationships and the mechanisms of multistep transitions in spin crossover materials and frameworks. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00799d] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Structure–property relationships are identified and applied to explain multi-step transitions and the different antiferroelastic patterns found in spin crossover frameworks.
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Affiliation(s)
- Jace Cruddas
- School of Mathematics and Physics
- University of Queensland
- Australia
| | - Ben J. Powell
- School of Mathematics and Physics
- University of Queensland
- Australia
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23
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Zhang CJ, Lian KT, Wu SG, Liu Y, Huang GZ, Ni ZP, Tong ML. The substituent guest effect on four-step spin-crossover behavior. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01420a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The fluoro substituent strategy on the guest in a three-dimensional Hofmann-type metal–organic framework is explored for four-step spin-crossover properties.
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Affiliation(s)
- Cui-Juan Zhang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Kai-Ting Lian
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Yang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou
- 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
- P. R. China
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Iron(II) Spin Crossover Complex with the 1,2,3-Triazole-Containing Linear Pentadentate Schiff-Base Ligand and the MeCN Monodentate Ligand. CRYSTALS 2019. [DOI: 10.3390/cryst9060276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A mononuclear iron(II) complex bearing the linear pentadentate N5 Schiff-base ligand containing two 1,2,3-triazole moieties and the MeCN monodentate ligand, [FeIIMeCN(L3-Me-3Ph)](BPh4)2·MeCN·H2O (1), have been prepared (L3-Me-3Ph = bis(N,N′-1-Phenyl-1H-1,2,3-triazol-4-yl-methylideneaminopropyl)methylamine). Variable-temperature magnetic susceptibility measurements revealed an incomplete one-step spin crossover (SCO) from the room-temperature low-spin (LS, S = 0) state to a mixture of the LS and high-spin (HS, S = 2) species at the higher temperature of around 400 K upon first heating, which is irreversible on the consecutive cooling mode. The magnetic modulation at around 400 K was induced by the crystal-to-amorphous transformation accompanied by the loss of lattice MeCN solvent, which was evident from powder X-ray diffraction (PXRD) studies and themogravimetry. The single-crystal X-ray diffraction studies showed that the complex is in the LS state (S = 0) between 296 and 387 K. In the crystal lattice, the complex-cations and B(1)Ph4− ions are alternately connected by intermolecular CH···π interactions between the methyl group of the MeCN ligand and phenyl groups of B(1)Ph4− ions, forming a 1D chain structure. The 1D chains are further connected by P4AE (parallel fourfold aryl embrace) interactions between two neighboring complex-cations, constructing a 2D extended structure. B(2)Ph4− ions and MeCN lattice solvents exist in the spaces of the 2D layer. DFT calculations verified that the 1,2,3-triazole-containing ligand L3-Me-3Ph gives a stronger ligand field around the octahedral coordination environment of the iron(II) ion than the analogous imidazole-containing ligand H2L2Me (= bis(N,N′-2-methylimidazol-4-yl-methylideneaminopropyl)methylamine) of the known compound [FeIIMeCN(H2L2Me)](BPh4)1.5·Cl0.5·0.5MeCN (2) reported by Matsumoto et al. (Nishi, K.; Fujinami, T.; Kitabayashi, A.; Matsumoto, N. Tetrameric spin crossover iron(II) complex constructed by imidazole⋯chloride hydrogen bonds. Inorg. Chem. Commun. 2011, 14, 1073–1076), resulting in the much higher spin transition temperature of 1 than that of 2.
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25
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Arafath MA, Kwong HC, Adam F. ( E)-2-(2-Hy-droxy-3-methyl-benzyl-idene)- N-methyl-hydrazine-1-carbo-thio-amide: supra-molecular assemblies in two-dimensions mediated by N-H⋯S and C-H⋯π inter-actions. Acta Crystallogr E Crystallogr Commun 2019; 75:571-575. [PMID: 31110788 PMCID: PMC6505611 DOI: 10.1107/s2056989019004444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/01/2019] [Indexed: 11/10/2022]
Abstract
In the title compound, C10H13N3OS, the azomethine C=N double bond has an E configuration. The phenyl ring and methyl-hydrazine carbo-thio-amide moiety [maximum deviation = 0.008 (2) Å] are twisted slightly with a dihedral angle of 14.88 (10)°. In the crystal, mol-ecules are linked into sheets parallel to the ab plane via N-H⋯S hydrogen bonds and C-H⋯π inter-actions.
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Affiliation(s)
- Md. Azharul Arafath
- Department of Chemistry, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
| | - Huey Chong Kwong
- School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800 USM, Malaysia
| | - Farook Adam
- School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800 USM, Malaysia
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Zhang CJ, Lian KT, Huang GZ, Bala S, Ni ZP, Tong ML. Hysteretic four-step spin-crossover in a 3D Hofmann-type metal–organic framework with aromatic guest. Chem Commun (Camb) 2019; 55:11033-11036. [DOI: 10.1039/c9cc06017k] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hysteretic four-step spin crossover behaviour with the sequence of LS ↔ HS0.25LS0.75 ↔ HS0.5LS0.5 ↔ HS0.67LS0.33 ↔ HS is observed for the first time.
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Affiliation(s)
- Cui-Juan Zhang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Kai-Ting Lian
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Sukhen Bala
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University
- Guangzhou
- 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
- P. R. China
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Yuan J, Liu MJ, Wu SQ, Zhu X, Zhang N, Sato O, Kou HZ. Substituent effects on the fluorescent spin-crossover Fe(ii) complexes of rhodamine 6G hydrazones. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00111e] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The magnetic properties of Fe(ii) pyridine-2-carbaldehyde rhodamine 6G hydrazone complexes are modulated by the substituents. The desolvated complex displays the correlation between the spin crossover and the fluorescence.
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Affiliation(s)
- Juan Yuan
- School of Pharmacy
- Henan University of Chinese Medicine
- Zhengzhou 450046
- P. R. China
- Department of Chemistry
| | - Mei-Jiao Liu
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering
- Kyushu University
- 819-0395 Fukuoka
- Japan
| | - Xin Zhu
- School of Pharmacy
- Henan University of Chinese Medicine
- Zhengzhou 450046
- P. R. China
| | - Nan Zhang
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering
- Kyushu University
- 819-0395 Fukuoka
- Japan
| | - Hui-Zhong Kou
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
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28
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Chen XQ, Cai YD, Ye YS, Tong ML, Bao X. Investigation of SCO property–structural relationships in a family of mononuclear Fe(ii) complexes. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00577c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Six complexes with the formula [FeL(NCE)2] (E = S, Se, BH3) have been reported. A survey of the magneto-structural relationship has been conducted.
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Affiliation(s)
- Xiu-Qin Chen
- School of Chemical Engineering
- Nanjing University of Science and Technology
- 210094 Nanjing
- P. R. China
| | - You-De Cai
- School of Chemical Engineering
- Nanjing University of Science and Technology
- 210094 Nanjing
- P. R. China
| | - Yi-Shan Ye
- School of Chemical Engineering
- Nanjing University of Science and Technology
- 210094 Nanjing
- P. R. China
| | - Ming-Liang Tong
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Xin Bao
- School of Chemical Engineering
- Nanjing University of Science and Technology
- 210094 Nanjing
- P. R. China
- State Key Laboratory of Coordination Chemistry
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29
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Rodríguez‐Jiménez S, Bondì L, Yang M, Garden AL, Brooker S. Predictable Electronic Tuning By Choice of Azine Substituent in Five Iron(II) Triazoles: Redox Properties and DFT Calculations. Chem Asian J 2018; 14:1158-1166. [PMID: 30550630 DOI: 10.1002/asia.201801537] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/13/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Santiago Rodríguez‐Jiménez
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of Otago P.O. Box 56 Dunedin 9054 New Zealand
| | - Luca Bondì
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of Otago P.O. Box 56 Dunedin 9054 New Zealand
| | - Mingrui Yang
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of Otago P.O. Box 56 Dunedin 9054 New Zealand
| | - Anna L. Garden
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of Otago P.O. Box 56 Dunedin 9054 New Zealand
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of Otago P.O. Box 56 Dunedin 9054 New Zealand
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30
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31
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Synthesis, Structure, and Photomagnetic Properties of a Hydrogen-Bonded Lattice of [Fe(bpp)2]2+ Spin-Crossover Complexes and Nicotinate Anions. CRYSTALS 2018. [DOI: 10.3390/cryst8110439] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this paper, we report on the synthesis, crystal structure, and photomagnetic properties of the spin-crossover salt of formula [Fe(bpp)2](C6H4NO2)2·4H2O (1·4H2O) (bpp = 2,6-bis(pyrazol-3-yl)pyridine; C6H4NO2− = nicotinate anion). This compound exhibits a 3D supramolecular architecture built from hydrogen bonds between iron(II) complexes, nicotinate anions, and water molecules. As synthesized, the hydrated material is low-spin and desolvation triggers a low-spin (LS) to high-spin (HS) transformation. Anhydrous phase 1 undergoes a partial spin crossover (T1/2= 281 K) and a LS to HS photomagnetic conversion with a T(LIESST) value of 56 K.
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32
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Giménez-López MDC, Clemente-León M, Giménez-Saiz C. Unravelling the spin-state of solvated [Fe(bpp) 2] 2+ spin-crossover complexes: structure-function relationship. Dalton Trans 2018; 47:10453-10462. [PMID: 29789828 DOI: 10.1039/c8dt01269e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
This paper reports firstly the syntheses, crystal structures, and thermal and magnetic properties of spin crossover salts of formulae [Fe(bpp)2]3[Cr(CN)6]2·13H2O (1) and [Fe(bpp)2][N(CN)2]2·H2O (2) (bpp = 2,6-bis(pyrazol-3-yl)pyridine) exhibiting hydrogen-bonded networks of low-spin [Fe(bpp)2]2+ complexes and [Cr(CN)6]3- or [N(CN)2]- anions, with solvent molecules located in the voids. Desolvation of 1 is accompanied by a complete low-spin (LS) to a high-spin (HS) transformation that becomes reversible after rehydration by exposing the sample to the humidity of air. The influence of the lattice water on the magnetic properties of spin-crossover [Fe(bpp)2]X2 complex salts has been documented. In most cases, it stabilises the LS state over the HS one. In other cases, it is rather the contrary. The second part of this paper is devoted to unravelling the reasons why the lattice solvent stabilises one form over the other through magneto-structural correlations of [Fe(bpp)2]2+ salts bearing anions with different charge/size ratios (Xn-). The [Fe(bpp)2]2+ stacking explaining these two different behaviours is correlated here with the composition of the second coordination sphere of the Fe centers and the ability of these anions to form hydrogen bonds and/or π-π stacking interactions between them or the bpp ligand.
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Affiliation(s)
- Maria Del Carmen Giménez-López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular, Universidad de Valencia, P.O. Box 22085, 46071 Valencia, Spain
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular, Universidad de Valencia, P.O. Box 22085, 46071 Valencia, Spain
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33
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Yuan J, Pei LX, Song JY, Kou HZ. Pyrimidine-based iron(III) complexes of 2-(pyrimidin-2-ylhydrazonomethyl)-phenol: Synthesis, crystal structure and magnetic properties. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Liu FL, Li D, Su LJ, Tao J. Reversible three equal-step spin crossover in an iron(ii) Hofmann-type metal–organic framework. Dalton Trans 2018; 47:1407-1411. [DOI: 10.1039/c7dt04205a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel bent ligand-pillared 3D Hofmann-type MOF exhibited incomplete three-step spin-crossover behavior with a sequence of HS1.00 ↔ HS0.75LS0.25 ↔ HS0.5LS0.5 ↔ HS0.25LS0.75.
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Affiliation(s)
- Fu-Ling Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Dong Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Li-Jie Su
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Jun Tao
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
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35
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Boonprab T, Harding P, Murray KS, Phonsri W, Telfer SG, Alkaş A, Ketkaew R, Tantirungrotechai Y, Jameson GNL, Harding DJ. Solvatomorphism and anion effects in predominantly low spin iron(iii) Schiff base complexes. Dalton Trans 2018; 47:12449-12458. [DOI: 10.1039/c8dt02016g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The magnetic properties of a series of iron(iii) complexes [Fe(naphEen)2]halide·sol are reported.
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Affiliation(s)
- Theerapoom Boonprab
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
| | | | | | - Shane G. Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- Palmerston North
- New Zealand
| | - Adil Alkaş
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- Palmerston North
- New Zealand
| | - Rangsiman Ketkaew
- Computational Chemistry Research Unit
- Department of Chemistry
- Faculty of Science and Technology
- Thammasat University
- Pathum Thani
| | - Yuthana Tantirungrotechai
- Computational Chemistry Research Unit
- Department of Chemistry
- Faculty of Science and Technology
- Thammasat University
- Pathum Thani
| | - Guy N. L. Jameson
- School of Chemistry
- Bio21 Molecular Science and Biotechnology Institute
- 30 Flemington Road
- The University of Melbourne
- Parkville
| | - David J. Harding
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
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36
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Liu W, Peng YY, Wu SG, Chen YC, Hoque MN, Ni ZP, Chen XM, Tong ML. Guest-Switchable Multi-Step Spin Transitions in an Amine-Functionalized Metal-Organic Framework. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708973] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wei Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Yuan-Yuan Peng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Si-Guo Wu
- 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
| | - Md. Najbul Hoque
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Xiao-Ming Chen
- 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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37
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Liu W, Peng YY, Wu SG, Chen YC, Hoque MN, Ni ZP, Chen XM, Tong ML. Guest-Switchable Multi-Step Spin Transitions in an Amine-Functionalized Metal-Organic Framework. Angew Chem Int Ed Engl 2017; 56:14982-14986. [DOI: 10.1002/anie.201708973] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/02/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Yuan-Yuan Peng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Si-Guo Wu
- 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
| | - Md. Najbul Hoque
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Xiao-Ming Chen
- 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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38
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Jornet-Mollá V, Duan Y, Giménez-Saiz C, Tang YY, Li PF, Romero FM, Xiong RG. A Ferroelectric Iron(II) Spin Crossover Material. Angew Chem Int Ed Engl 2017; 56:14052-14056. [DOI: 10.1002/anie.201707401] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/28/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Verónica Jornet-Mollá
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Yan Duan
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Yuan-Yuan Tang
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
| | - Peng-Fei Li
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
| | - Francisco M. Romero
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Ren-Gen Xiong
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
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39
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Jornet-Mollá V, Duan Y, Giménez-Saiz C, Tang YY, Li PF, Romero FM, Xiong RG. A Ferroelectric Iron(II) Spin Crossover Material. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707401] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Verónica Jornet-Mollá
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Yan Duan
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Yuan-Yuan Tang
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
| | - Peng-Fei Li
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
| | - Francisco M. Romero
- Instituto de Ciencia Molecular; Universitat de València; P. O. Box 22085 46071 Valencia Spain
| | - Ren-Gen Xiong
- Ordered Matter Science Research Center; Southeast University; Nanjing 211189 P. R. China
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40
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Spin crossover in iron(II) complexes of 3,4,5-tri-substituted-1,2,4-triazole (Rdpt), 3,5-di-substituted-1,2,4-triazolate (dpt − ), and related ligands. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.10.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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41
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Meng Y, Sheng QQ, Hoque MN, Chen YC, Wu SG, Tucek J, Zboril R, Liu T, Ni ZP, Tong ML. Two-Step Spin-Crossover with Three Inequivalent FeII
Sites in a Two-Dimensional Hofmann-Type Coordination Polymer. Chemistry 2017; 23:10034-10037. [DOI: 10.1002/chem.201702356] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Yan Meng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry, Sun Yat-Sen University; Guangzhou 510275 P. R. China
- Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes; Anqing Normal University; Anqing 246011 P. R. China
| | - Qing-Qing Sheng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry, Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Md. Najbul Hoque
- 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
| | - Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; School of Chemistry, Sun Yat-Sen University; Guangzhou 510275 P. R. China
| | - Jiri Tucek
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science; Palacky University; Slechtitelu 27 783 71 Olomouc Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science; Palacky University; Slechtitelu 27 783 71 Olomouc Czech Republic
| | - Tao Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116024 P. R. China
| | - Zhao-Ping Ni
- 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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42
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Hu P, Yin L, Mao NN, Yu F, Li B, Wang ZX, Zhang T. A series of six-membered lanthanide rings based on 2,2-bis(hydroxymethyl)-2,2′,2″-nitrilotriethanol: synthesis, crystal structures and magnetic properties. CrystEngComm 2017. [DOI: 10.1039/c7ce01063j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A series of six-membered ring cyclic lanthanide(iii) clusters have been constructed by utilizing the pentol ligand.
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Affiliation(s)
- Peng Hu
- Key laboratory of Material Chemistry for Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- PR China
| | - Lei Yin
- Wuhan National High Magnetic Field Centre Huazhong University of Science and Technology
- Wuhan
- PR China
| | - Nan-nan Mao
- Key laboratory of Material Chemistry for Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- PR China
| | - Fan Yu
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education
- School of Chemical and Environmental Engineering Jianghan University
- Wuhan
- PR China
| | - Bao Li
- Key laboratory of Material Chemistry for Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- PR China
| | - Zhen-xing Wang
- Wuhan National High Magnetic Field Centre Huazhong University of Science and Technology
- Wuhan
- PR China
| | - Tianle Zhang
- Key laboratory of Material Chemistry for Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- PR China
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43
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Yan Z, Zhu LF, Zhu LW, Meng Y, Hoque MN, Liu JL, Chen YC, Ni ZP, Tong ML. A ladder-type iron(ii) coordination polymer with enhanced spin-crossover behavior. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00180k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A ladder-type 1D coordination polymer with enhanced spin-crossover behaviour is reported. It showed an abrupt spin transition above room temperature with a 3 K hysteresis (T1/2↓ = 335 K andT1/2↑ = 338 K).
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Affiliation(s)
- Zheng Yan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Long-Feng Zhu
- College of Biological
- Chemical Sciences and Engineering
- Jiaxing University
- Jiaxing 314001
- P. R. China
| | - Lian-Wen Zhu
- College of Biological
- Chemical Sciences and Engineering
- Jiaxing University
- Jiaxing 314001
- P. R. China
| | - Yan Meng
- Anhui Key Laboratory of Functional Coordination Compounds
- Anqing Normal University
- Anqing 246011
- China
| | - Md. Najbul Hoque
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the 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 the 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 the Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the 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 the Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
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44
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Phonsri W, Harding P, Murray KS, Moubaraki B, Harding DJ. Spin crossover in mixed ligand iron(iii) complexes. NEW J CHEM 2017. [DOI: 10.1039/c7nj03676k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of two subtly different ligands is used to explore their impact on spin crossover characteristics.
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Affiliation(s)
- Wasinee Phonsri
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech)
- Walailak University
- Thasala
- Thailand
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech)
- Walailak University
- Thasala
- Thailand
| | | | | | - David J. Harding
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech)
- Walailak University
- Thasala
- Thailand
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45
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Wang CF, Sun MJ, Guo QJ, Cao ZX, Zheng LS, Tao J. Multiple correlations between spin crossover and fluorescence in a dinuclear compound. Chem Commun (Camb) 2016; 52:14322-14325. [PMID: 27886303 DOI: 10.1039/c6cc07810a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiple correlations between spin crossover and fluorescence are established in a dinuclear compound with fluorescence from d(Fe) + π(SCN) to π*(ligand) charge transfer and correlation originated from ligand to Fe(ii) energy transfer.
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Affiliation(s)
- Chun-Feng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China. and Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Ming-Jun Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
| | - Qi-Jie Guo
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
| | - Ze-Xing Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
| | - Lan-Sun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
| | - Jun Tao
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China. and Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
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Trzop E, Zhang D, Piñeiro-Lopez L, Valverde-Muñoz FJ, Carmen Muñoz M, Palatinus L, Guerin L, Cailleau H, Real JA, Collet E. First Step Towards a Devil's Staircase in Spin-Crossover Materials. Angew Chem Int Ed Engl 2016; 55:8675-9. [PMID: 27193972 DOI: 10.1002/anie.201602441] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Indexed: 11/11/2022]
Abstract
The unprecedented bimetallic 2D coordination polymer {Fe[(Hg(SCN)3 )2 ](4,4'-bipy)2 }n exhibits a thermal high-spin (HS)↔low-spin (LS) staircase-like conversion characterized by a multi-step dependence of the HS molar fraction γHS . Between the fully HS (γHS =1) and LS (γHS =0) phases, two steps associated with different ordering appear in terms of spin-state concentration waves (SSCW). On the γHS ≈0.5 step, a periodic SSCW forms with a HS-LS-HS-LS sequence. On the γHS ≈0.34 step, the 4D superspace crystallography structural refinement reveals an aperiodic SSCW, with a HS-LS sequence incommensurate with the molecular lattice. The formation of these different long-range spatially ordered structures of LS and HS states during the multi-step spin-crossover is discussed within the framework of "Devil's staircase"-type transitions. Spatially modulated phases are known in various types of materials but are uniquely related to molecular HS/LS bistability in this case.
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Affiliation(s)
- Elzbieta Trzop
- Institut de Physique de Rennes, Université de Rennes 1, UMR UR1-CNRS 6251, 35000, Rennes, France
| | - Daopeng Zhang
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain.,College of Chemical Engineering, Shandong University of Technology, Zibo, 255049, China
| | - Lucia Piñeiro-Lopez
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain
| | - Francisco J Valverde-Muñoz
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain
| | - M Carmen Muñoz
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
| | - Lukas Palatinus
- Department of Structure Analysis, Institute of Physics of Academy of Sciences of Czech Republic, 18221, Prague, Czech Republic
| | - Laurent Guerin
- Institut de Physique de Rennes, Université de Rennes 1, UMR UR1-CNRS 6251, 35000, Rennes, France
| | - Hervé Cailleau
- Institut de Physique de Rennes, Université de Rennes 1, UMR UR1-CNRS 6251, 35000, Rennes, France
| | - Jose Antonio Real
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain.
| | - Eric Collet
- Institut de Physique de Rennes, Université de Rennes 1, UMR UR1-CNRS 6251, 35000, Rennes, France.
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47
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Trzop E, Zhang D, Piñeiro-Lopez L, Valverde-Muñoz FJ, Carmen Muñoz M, Palatinus L, Guerin L, Cailleau H, Real JA, Collet E. First Step Towards a Devil's Staircase in Spin-Crossover Materials. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602441] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Elzbieta Trzop
- Institut de Physique de Rennes; Université de Rennes 1, UMR UR1-CNRS 6251; 35000 Rennes France
| | - Daopeng Zhang
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/ Catedrático José Beltrán Martínez 2 46980 Paterna Valencia Spain
- College of Chemical Engineering; Shandong University of Technology; Zibo 255049 China
| | - Lucia Piñeiro-Lopez
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/ Catedrático José Beltrán Martínez 2 46980 Paterna Valencia Spain
| | - Francisco J. Valverde-Muñoz
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/ Catedrático José Beltrán Martínez 2 46980 Paterna Valencia Spain
| | - M. Carmen Muñoz
- Departamento de Física Aplicada; Universitat Politècnica de València; Camino de Vera s/n 46022 Valencia Spain
| | - Lukas Palatinus
- Department of Structure Analysis; Institute of Physics of Academy of Sciences of Czech Republic; 18221 Prague Czech Republic
| | - Laurent Guerin
- Institut de Physique de Rennes; Université de Rennes 1, UMR UR1-CNRS 6251; 35000 Rennes France
| | - Hervé Cailleau
- Institut de Physique de Rennes; Université de Rennes 1, UMR UR1-CNRS 6251; 35000 Rennes France
| | - Jose Antonio Real
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/ Catedrático José Beltrán Martínez 2 46980 Paterna Valencia Spain
| | - Eric Collet
- Institut de Physique de Rennes; Université de Rennes 1, UMR UR1-CNRS 6251; 35000 Rennes France
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Yan Z, Liu W, Peng YY, Chen YC, Li QW, Ni ZP, Tong ML. Spin-Crossover Phenomenon in a Pentanuclear Iron(II) Cluster Helicate. Inorg Chem 2016; 55:4891-6. [DOI: 10.1021/acs.inorgchem.6b00416] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Zheng Yan
- Key
Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of
Education, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
- College
of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, P. R. China
| | - Wei Liu
- Key
Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of
Education, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Yuan-Yuan Peng
- Key
Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of
Education, School of Chemistry and Chemical Engineering, 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 and Chemical Engineering, 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 and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Zhao-Ping Ni
- Key
Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of
Education, School of Chemistry and Chemical Engineering, 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 and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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49
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Wang JL, Liu Q, Lv XJ, Wang RL, Duan CY, Liu T. Magnetic fluorescent bifunctional spin-crossover complexes. Dalton Trans 2016; 45:18552-18558. [DOI: 10.1039/c6dt03714c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Bifunctional fluorescent spin crossover complexes exhibit thermally and light induced conversion from the low spin to the high spin state, as well as fluorescence emission.
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Affiliation(s)
- Jun-Li Wang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Xiao-Jin Lv
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Rui-Lin Wang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Chun-Ying Duan
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
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