101
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Nemec I, Herchel R, Trávníček Z. The relationship between the strength of hydrogen bonding and spin crossover behaviour in a series of iron(III) Schiff base complexes. Dalton Trans 2015; 44:4474-84. [PMID: 25645590 DOI: 10.1039/c4dt03400g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray crystal structures and magnetic properties of an isostructural series of iron(III) Schiff base complexes with the general formula [Fe(L(5))(NCX)]·Solv (where H2L(5) = N,N'-bis(2-hydroxy-naphthylidene)-1,6-diamino-4-azahexane, X = S, Solv = tetrahydrofuran, 1a; X = S, Solv = methanol and 0.5 pyrazine, 1b; X = S, Solv = butanone, 1c; Solv = N,N'-dimethylformamide, X = S (1d) or X = Se (1d'); X = S, Solv = dimethyl sulfoxide, 1e) are reported. In the crystals, the individual [Fe(L(5))(NCX)] molecules are connected through weak C-H···O, C-H···π or C-H···S non-covalent contacts into 2D supramolecular networks, while the guest-solvent (Solv) molecules are trapped in the cavities between two adjacent layers, which are furthermore stabilized by N-H···O hydrogen bonds connecting the Solv oxygen atom with the amine group of the [Fe(L(5))(NCX)] molecule, with the N···O distances varying from 2.921(6) Å (in 1d') to 3.295(2) Å (in 1a). The magnetic properties of the complexes were tuned by the different Solv molecules and as a result of this, four new spin crossover (SCO) compounds with cooperative spin transitions are reported, which are accompanied by thermal hysteresis in two cases (1d and 1e): , T1/2 = 84 K; 1d, T1/2↓ = 232 K, T1/2↑ = 235 K and 1e, T1/2↓ = 127 K, T1/2↑ = 138 K. The role of the N-H···O hydrogen bonding in the occurrence and tuning of SCO was also computationally studied using a topological analysis, and also by evaluation of non-covalent interaction (NCI) indexes. Both theoretical approaches showed a clear relationship between the strength of the N-H···O hydrogen bonds and T1/2, as already inferred from X-ray structural and magnetic data.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacký University, Tř. 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
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102
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Krüger C, Augustín P, Dlháň L, Pavlik J, Moncol’ J, Nemec I, Boča R, Renz F. Iron(III) complexes with pentadentate Schiff-base ligands: Influence of crystal packing change and pseudohalido coligand variations on spin crossover. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.11.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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103
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Vieira BJC, Dias JC, Santos IC, Pereira LCJ, da Gama V, Waerenborgh JC. Thermal Hysteresis in a Spin-Crossover FeIII Quinolylsalicylaldimine Complex, FeIII(5-Br-qsal)2Ni(dmit)2·solv: Solvent Effects. Inorg Chem 2015; 54:1354-62. [DOI: 10.1021/ic502278d] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bruno J. C. Vieira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - João C. Dias
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Isabel C. Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Laura C. J. Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Vasco da Gama
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - João C. Waerenborgh
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
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104
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Scott HS, Ross TM, Phonsri W, Moubaraki B, Chastanet G, Létard J, Batten SR, Murray KS. Discrete Fe
II
Spin‐Crossover Complexes of 2,2′‐Dipyridylamino‐Substituted
s
‐Triazine Ligands with Phenoxo, Cyanophenoxo and Dibenzylamino Functionalities. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201402972] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hayley S. Scott
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Tamsyn M. Ross
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Wasinee Phonsri
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Boujemaa Moubaraki
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
| | - Guillaume Chastanet
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 Pessac, France
| | - Jean‐François Létard
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 Pessac, France
| | - Stuart R. Batten
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Keith S. Murray
- School of Chemistry, Building 23, Monash University, Clayton, Victoria 3800, Australia, http://monash.edu/science/about/schools/chemistry/staff/murray.html
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105
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Iasco O, Rivière E, Guillot R, Buron-Le Cointe M, Meunier JF, Bousseksou A, Boillot ML. FeII(pap-5NO2)2 and FeII(qsal-5NO2)2 Schiff-Base Spin-Crossover Complexes: A Rare Example with Photomagnetism and Room-Temperature Bistability. Inorg Chem 2015; 54:1791-9. [DOI: 10.1021/ic5027043] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Olga Iasco
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
| | - Eric Rivière
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
| | - Régis Guillot
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
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106
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Murashima Y, Karim MR, Saigo N, Takehira H, Ohtani R, Nakamura M, Koinuma M, Lindoy LF, Kuroiwa K, Hayami S. Graphene oxide and reduced graphene oxide hybrids with spin crossover iron(iii) complexes. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00097a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Graphene oxide and reduced graphene oxide hybrids with spin crossover complexes show the coexistence of electron conduction and unique magnetic behaviors.
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Affiliation(s)
- Yusuke Murashima
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Mohammad Razaul Karim
- Department of Chemistry
- School of Physical Sciences
- Shahjalal University of Science & Technology
- Sylhet-3114
- Bangladesh
| | - Naoto Saigo
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Hiroshi Takehira
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Ryo Ohtani
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Masaaki Nakamura
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Michio Koinuma
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | | | - Keita Kuroiwa
- Department of Nanoscience
- Faculty of Engineering
- Sojo University
- Kumamoto 860-0082
- Japan
| | - Shinya Hayami
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
- Institute of Pulsed Power Science (IPPS)
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107
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Qin LF, Pang CY, Han WK, Zhang FL, Tian L, Gu ZG, Ren X, Li Z. Optical recognition of alkyl nitrile by a homochiral iron(ii) spin crossover host. CrystEngComm 2015. [DOI: 10.1039/c5ce01617g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a chiral mononuclear spin crossover host1·MeCN was found to have the ability to optically recognize lactonitrile (LN) and methylglutaronitrile (MGN).
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Affiliation(s)
- Long-Fang Qin
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Chun-Yan Pang
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Wang-Kang Han
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Feng-Li Zhang
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Lei Tian
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Zhi-Guo Gu
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
| | - Xuehong Ren
- The Key Laboratory of Eco-textiles of Ministry of Education
- College of Textiles and Clothing
- Jiangnan University
- Wuxi 214122, China
| | - Zaijun Li
- The Key Laboratory of Food Colloids and Biotechnology Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122, China
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108
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Fitzpatrick AJ, O'Connor HM, Morgan GG. A room temperature spin crossover ionic liquid. Dalton Trans 2015; 44:20839-42. [DOI: 10.1039/c5dt04264j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new paramagnetic ionic liquids (ILs) comprising a mononuclear iron(iii) or manganese(iii) complex cation, charge balanced by a dicyanamide anion are reported which show a range of spin states including spin crossover.
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109
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Yang Q, Cheng X, Wang Y, Wang B, Wang Z, Gao S. Two-step magnetic switching in a mononuclear iron(ii) complex around room temperature. Dalton Trans 2015; 44:8938-41. [DOI: 10.1039/c5dt00585j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear Fe(ii) complex displays two-step SCO with Tc1↓ = 250 K, Tc1↑ = 260 K and Tc2 = 295 K.
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Affiliation(s)
- Qian Yang
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Xin Cheng
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - YeXin Wang
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - BingWu Wang
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - ZheMing Wang
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Song Gao
- Beijing National Laboratory of Molecular Science
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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110
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Vieira BJ, Coutinho JT, Dias JC, Nunes JC, Santos IC, Pereira LC, da Gama V, Waerenborgh JC. Crystal structure and spin crossover behavior of the [Fe(5-Cl-qsal)2][Ni(dmit)2]·2CH3CN complex. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.09.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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111
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Molecular motor-driven abrupt anisotropic shape change in a single crystal of a Ni complex. Nat Chem 2014; 6:1079-83. [PMID: 25411886 DOI: 10.1038/nchem.2092] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/19/2014] [Indexed: 11/08/2022]
Abstract
Many molecular machines with controllable molecular-scale motors have been developed. However, transmitting molecular movement to the macroscopic scale remains a formidable challenge. Here we report a single crystal of a Ni complex whose shape changes abruptly and reversibly in response to thermal changes at around room temperature. Variable-temperature single-crystal X-ray diffraction studies show that the crystalline shape change is induced by an unusual 90° rotation of uniaxially aligned oxalate molecules. The oxalate dianions behave as molecular-scale rotors, with their movement propagated through the entire crystalline material via intermolecular hydrogen bonding. Consequently, the subnanometre-scale changes in the oxalate molecules are instantly amplified to a micrometre-scale contraction or expansion of the crystal, accompanied by a thermal hysteresis loop. The shape change in the crystal was clearly detected under an optical microscope. The large directional deformation and prompt response suggest a role for this material in microscale or nanoscale thermal actuators.
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112
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113
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Nakaya M, Shimayama K, Takami K, Hirata K, Alao AS, Nakamura M, Lindoy LF, Hayami S. Spin-crossover and LIESST Effect for Iron(III) Complex Based on π–π Stacking by Coordination Programming. CHEM LETT 2014. [DOI: 10.1246/cl.140255] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Manabu Nakaya
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Kodai Shimayama
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Kohei Takami
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Kazuya Hirata
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Amolegbe Saliu Alao
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
- Department of Chemistry, College of Natural Science, Federal University of Agriculture
| | - Masaaki Nakamura
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | | | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
- JST, CREST
- Institute of Pulsed Power Science (IPPS), Kumamoto University
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114
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Structures and Magnetic Properties of Iron(III) Complexes with Long Alkyl Chains. CRYSTALS 2014. [DOI: 10.3390/cryst4020104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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115
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Middlemiss DS, Deeth RJ. First principles calculation of a large variation in dielectric tensor through the spin crossover in the CsFe[Cr(CN)6] Prussian blue analogue. J Chem Phys 2014; 140:144503. [DOI: 10.1063/1.4869864] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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116
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Fujinami T, Koike M, Matsumoto N, Sunatsuki Y, Okazawa A, Kojima N. Abrupt Spin Transition with Thermal Hysteresis of Iron(III) Complex [FeIII(Him)2(hapen)]AsF6 (Him = Imidazole, H2hapen = N,N′-Bis(2-hydroxyacetophenylidene)ethylenediamine). Inorg Chem 2014; 53:2254-9. [DOI: 10.1021/ic402947u] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeshi Fujinami
- Department
of Chemistry, Faculty of Science, Kumamoto University, Kurokami
2-39-1, Kumamoto 860-8555, Japan
| | - Masataka Koike
- Department
of Chemistry, Faculty of Science, Kumamoto University, Kurokami
2-39-1, Kumamoto 860-8555, Japan
| | - Naohide Matsumoto
- Department
of Chemistry, Faculty of Science, Kumamoto University, Kurokami
2-39-1, Kumamoto 860-8555, Japan
| | - Yukinari Sunatsuki
- Department of Chemistry, Faculty of Science, Okayama University, Tsushima-naka 1-1, Okayama 700-8530, Japan
| | - Atsushi Okazawa
- Department of Basic
Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan
| | - Norimichi Kojima
- Department of Basic
Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan
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117
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Sertphon D, Harding DJ, Harding P, Murray KS, Moubaraki B, Adams H. Steric Trapping of the High Spin State in FeIII Quinolylsalicylaldimine Complexes. Aust J Chem 2014. [DOI: 10.1071/ch14177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new sterically bulky Schiff base ligand, N-(8-quinolyl)-5-tert-butylsalicylaldimine (Hqsal-5-tBu) has been prepared and a series of FeIII complexes, [Fe(qsal-5-tBu)2]Y (Y = Cl 1, ClO4 2, NO3 3, BF4 4) utilising this ligand are reported and fully characterised. UV-vis spectroscopic and electrochemical studies indicate that 1–4 are high spin (HS) in solution at room temperature and further suggest that the tBu group only slightly alters the electronic properties of 1–4 compared with related [Fe(qsal-5-X)2]+ systems. The structures of [Fe(qsal-5-tBu)2]Cl·4MeOH·H2O 1, [Fe(qsal-5-tBu)2]ClO4·MeOH 2, and [Fe(qsal-5-tBu)2]NO3 3 determined at 100 K reveal HS FeIII centres in all cases. Four-fold parallel aryl embraces and π–π interactions serve to link the cations forming 2D sheets mirroring the motifs found in other [Fe(qsal-5-X)2]+ complexes. Despite this the tBu group causes strong distortions at the Fe centre which as magnetic studies reveal prevent spin crossover trapping 1–4 in the HS state.
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118
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Phonsri W, Harding DJ, Harding P, Murray KS, Moubaraki B, Gass IA, Cashion JD, Jameson GNL, Adams H. Stepped spin crossover in Fe(iii) halogen substituted quinolylsalicylaldimine complexes. Dalton Trans 2014; 43:17509-18. [DOI: 10.1039/c4dt01701c] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four iron(iii) spin crossover complexes with halogen substituted ligands are reported. The halogen is correlated with T1/2 and controls the degree of spin crossover while extensive C–H⋯X and X⋯π interactions increase cooperativity.
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Affiliation(s)
- Wasinee Phonsri
- Molecular Technology Research Unit Cell
- School of Science
- Walailak University
- Thasala, Thailand
- School of Chemistry
| | - David J. Harding
- Molecular Technology Research Unit Cell
- School of Science
- Walailak University
- Thasala, Thailand
| | - Phimphaka Harding
- Molecular Technology Research Unit Cell
- School of Science
- Walailak University
- Thasala, Thailand
| | - Keith S. Murray
- School of Chemistry
- Monash University
- Clayton, Melbourne, Australia
| | | | - Ian A. Gass
- School of Chemistry
- Monash University
- Clayton, Melbourne, Australia
- Now at the School of Pharmacy and Biomolecular Sciences
- University of Brighton
| | - John D. Cashion
- School of Physics
- Monash University
- Clayton, Melbourne, Australia
| | - Guy N. L. Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054, New Zealand
| | - Harry Adams
- Department of Chemistry
- University of Sheffield
- Sheffield, UK
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119
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Bushuev MB, Daletsky VA, Pishchur DP, Gatilov YV, Korolkov IV, Nikolaenkova EB, Krivopalov VP. Unprecedented bistability domain and interplay between spin crossover and polymorphism in a mononuclear iron(ii) complex. Dalton Trans 2014; 43:3906-10. [DOI: 10.1039/c3dt53440e] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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120
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Togo T, Amolegbe SA, Yamaguchi R, Kuroda-Sowa T, Nakaya M, Shimayama K, Nakamura M, Hayami S. Crystal Structure and Spin-crossover Behavior of Iron(III) Complex with Nitroprusside. CHEM LETT 2013. [DOI: 10.1246/cl.130759] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takahiro Togo
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Saliu Alao Amolegbe
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
- Department of Chemistry, College of Natural Science, Federal University of Agriculture
| | | | | | - Manabu Nakaya
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Kodai Shimayama
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Masaaki Nakamura
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
| | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University
- Institute of Pulsed Power Science (IPPS), Kumamoto University
- CREST, JST
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121
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Yoshida K, Akahoshi D, Kawasaki T, Saito T, Kitazawa T. Guest-dependent spin crossover in a Hofmann-type coordination polymer Fe(4,4′-bipyridyl)[Au(CN)2]2·nGuest. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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122
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Tissot A, Fertey P, Guillot R, Briois V, Boillot M. Structural, Magnetic, and Vibrational Investigations of Fe
III
Spin‐Crossover Compounds [Fe(4‐MeO–SalEen)
2
]X with X = NO
3
–
and PF
6
–. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300960] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Antoine Tissot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
| | - Pierre Fertey
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, 91192 Gif sur Yvette, France
| | - Régis Guillot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
| | - Valérie Briois
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, 91192 Gif sur Yvette, France
| | - Marie‐Laure Boillot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
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123
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Ostrovsky SM, Reu OS, Palii AV, Clemente-León M, Coronado E, Waerenborgh JC, Klokishner SI. Modeling the Magnetic Properties and Mössbauer Spectra of Multifunctional Magnetic Materials Obtained by Insertion of a Spin-Crossover Fe(III) Complex into Bimetallic Oxalate-Based Ferromagnets. Inorg Chem 2013; 52:13536-45. [DOI: 10.1021/ic401997w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. M. Ostrovsky
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy Street 5, Kishinev, MD-2028, Moldova
| | - O. S. Reu
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy Street 5, Kishinev, MD-2028, Moldova
| | - A. V. Palii
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy Street 5, Kishinev, MD-2028, Moldova
| | - M. Clemente-León
- Instituto
de Ciencia Molecular (ICMol), Universitat de Valencia, Catedrático
José Beltrán 2 46980 Paterna, Spain
| | - E. Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat de Valencia, Catedrático
José Beltrán 2 46980 Paterna, Spain
| | - J. C. Waerenborgh
- IST/ITN, Instituto
Superior Técnico, Universidade Técnica de Lisboa, CFMC-UL 2686-953 Sacavém, Portugal
| | - S. I. Klokishner
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy Street 5, Kishinev, MD-2028, Moldova
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124
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Wang YT, Li ST, Wu SQ, Cui AL, Shen DZ, Kou HZ. Spin Transitions in Fe(II) Metallogrids Modulated by Substituents, Counteranions, and Solvents. J Am Chem Soc 2013; 135:5942-5. [DOI: 10.1021/ja312622c] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi-Tong Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Shu-Tao Li
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Shu-Qi Wu
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Ai-Li Cui
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - De-Zhong Shen
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Hui-Zhong Kou
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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125
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Duan HB, Chen XR, Yang H, Ren XM, Xuan F, Zhou SM. Disorder-order transformation and significant dislocation motion cooperating with a surprisingly large hysteretic magnetic transition in a nickel-bisdithiolene spin system. Inorg Chem 2013; 52:3870-7. [PMID: 23517030 DOI: 10.1021/ic302571p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The compound [4'-CF3bzPy][Ni(mnt)2] (1) (where 4'-CF3bzPy = 1-(4'-(trifluoromethyl)benzyl)pyridinium and mnt(2-) = maleonitriledithiolate) was synthesized and displays a magnetic bistability with a surprisingly large thermal hysteresis loop (~49 K). X-ray crystallographic studies reveal that in the high-temperature (HT) phase the anions and cations form mixed stacks, with alternating anion dimers (AA) and cation dimers (CC) in an ...AACCAACC... fashion along the crystallographic a + b direction, and disordered CF3 groups in the cations are aligned into a molecular layer parallel to the crystallographic (001) plane. However, in the low-temperature (LT) phase, the c-axis length of the unit cell is roughly doubled, and the asymmetric unit switches from one [4'-CF3bzPy][Ni(mnt)2] pair in the HT phase to two [4'-CF3bzPy][Ni(mnt)2] pairs. Most interestingly, the CF3 group in the cations becomes ordered, and the conformation of one of two crystallographically different cations changes significantly. A dislocation motion between the neighboring molecular layers emerges as well. The analyses of the magnetic susceptibilities and the density functional theory calculations suggest that the antiferromagnetic exchange interaction within one of two types of [Ni(mnt)2]2(2-) dimers in the LT phase is much stronger than that within the [Ni(mnt)2]2(2-) dimer in the HT phase. The lattice reorganization during this phase transition is proposed to be responsible for the wide thermal hysteresis loop.
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Affiliation(s)
- Hai-Bao Duan
- State Key Laboratory of Materials-Oriented Chemical Engineering and College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China
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126
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127
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Cook C, Habib F, Aharen T, Clérac R, Hu A, Murugesu M. High-temperature spin crossover behavior in a nitrogen-rich Fe(III)-based system. Inorg Chem 2013; 52:1825-31. [PMID: 23387958 DOI: 10.1021/ic301864d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A nitrogen-rich ligand bis(1H-tetrazol-5-yl)amine (H(3)bta) was employed to isolate a new Fe(III) complex, Na(2)NH(4)[Fe(III)(Hbta)(3)]·3DMF·2H(2)O (1). Single crystal X-ray diffraction revealed that complex 1 consists of Fe(III) ions in an octahedral environment where each metal ion is coordinated by three Hbta(2-) ligands forming the [Fe(III)(Hbta)(3)](3-) core. Each unit is linked to two one-dimensional (1-D) Na(+)/solvent chains creating a two-dimensional (2-D) network. In addition, the presence of multiple hydrogen bonds in all directions between ammonium cation and ligands of different [Fe(III)(Hbta)(3)](3-) units generates a three-dimensional (3-D) network. Magnetic measurements confirmed that the Fe(III) center undergoes a Spin Crossover (SCO) at high temperature (T(1/2) = 460(10) K).
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Affiliation(s)
- Cyril Cook
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N6N5, Canada
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128
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Faulmann C, Chahine J, Valade L, Chastanet G, Létard JF, de Caro D. Photomagnetic Studies of Spin-Crossover- and Photochromic-Based Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201328] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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129
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Nishi K, Kondo H, Fujinami T, Matsumoto N, Iijima S, Halcrow MA, Sunatsuki Y, Kojima M. Stepwise Spin Transition and Hysteresis of a Tetrameric Iron(II) Complex,fac-[Tris(2-methylimidazol-4-ylmethylidene-n-hexylamine)]iron(II) Chloride Hexafluorophosphate, Assembled by Imidazole···Chloride Hydrogen Bonds. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201298] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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130
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Hayami S, Karim MR, Lee YH. Magnetic Behavior and Liquid-Crystal Properties in Spin-Crossover Cobalt(II) Compounds with Long Alkyl Chains. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201107] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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131
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Harding DJ, Phonsri W, Harding P, Gass IA, Murray KS, Moubaraki B, Cashion JD, Liu L, Telfer SG. Abrupt spin crossover in an iron(iii) quinolylsalicylaldimine complex: structural insights and solvent effects. Chem Commun (Camb) 2013; 49:6340-2. [DOI: 10.1039/c3cc42125b] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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132
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Djukic B, Jenkins HA, Seda T, Lemaire MT. Structural and magnetic properties of homoleptic iron(III) complexes containing N-(8-quinolyl)-salicylaldimine [Fe(Qsal)2]+X− {X = I or (Qsal)FeCl3}. TRANSIT METAL CHEM 2012. [DOI: 10.1007/s11243-012-9679-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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133
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Krüger C, Augustín P, Nemec I, Trávníček Z, Oshio H, Boča R, Renz F. Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201201038] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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134
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Sertphon D, Harding DJ, Harding P, Murray KS, Moubaraki B, Cashion JD, Adams H. Anionic Tuning of Spin Crossover in Fe
III
–Quinolylsalicylaldiminate Complexes. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201201066] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Darunee Sertphon
- Molecular Technology Research Unit Cell, Walailak University, Thasala, Nakhon Si Thammarat 80161, Thailand, Fax: +66‐75‐672004, http://https://sites.google.com/site/moleculardesignwu/
| | - David J. Harding
- Molecular Technology Research Unit Cell, Walailak University, Thasala, Nakhon Si Thammarat 80161, Thailand, Fax: +66‐75‐672004, http://https://sites.google.com/site/moleculardesignwu/
| | - Phimphaka Harding
- Molecular Technology Research Unit Cell, Walailak University, Thasala, Nakhon Si Thammarat 80161, Thailand, Fax: +66‐75‐672004, http://https://sites.google.com/site/moleculardesignwu/
| | - Keith S. Murray
- Department of Chemistry, Monash University, Melbourne, Victoria 3800, Australia
| | - Boujemaa Moubaraki
- Department of Chemistry, Monash University, Melbourne, Victoria 3800, Australia
| | - John D. Cashion
- Department of Physics, Monash University, Melbourne, Victoria 3800, Australia
| | - Harry Adams
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, UK
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135
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Harding DJ, Sertphon D, Harding P, Murray KS, Moubaraki B, Cashion JD, Adams H. FeIIIQuinolylsalicylaldimine Complexes: A Rare Mixed-Spin-State Complex and Abrupt Spin Crossover. Chemistry 2012. [DOI: 10.1002/chem.201202053] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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136
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Martinho PN, Gildea B, Harris MM, Lemma T, Naik AD, Müller-Bunz H, Keyes TE, Garcia Y, Morgan GG. Cooperative Spin Transition in a Mononuclear Manganese(III) Complex. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205573] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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137
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Martinho PN, Gildea B, Harris MM, Lemma T, Naik AD, Müller-Bunz H, Keyes TE, Garcia Y, Morgan GG. Cooperative Spin Transition in a Mononuclear Manganese(III) Complex. Angew Chem Int Ed Engl 2012; 51:12597-601. [PMID: 23129209 DOI: 10.1002/anie.201205573] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 08/28/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Paulo N Martinho
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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138
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Synthesis, structures, and magnetic properties of iron(II) complexes, [FeII(HLMe)2](ClO4)2 and its ethanol adduct [FeII(HLMe)2](ClO4)2·EtOH (HLMe=2-methylimidazol-4-yl-methylideneamino-2-ethylpyridine): Their structural distortion and spin states. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.09.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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139
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Ishikawa R, Breedlove BK, Yamashita M. Crystal Structure and Magnetic Properties of a Dinuclear High-Spin Iron(III) Complex with Face-to-Face Bis(Salen)-Type Ligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200914] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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140
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Lin JB, Xue W, Wang BY, Tao J, Zhang WX, Zhang JP, Chen XM. Chemical/Physical Pressure Tunable Spin-Transition Temperature and Hysteresis in a Two-Step Spin Crossover Porous Coordination Framework. Inorg Chem 2012; 51:9423-30. [DOI: 10.1021/ic301237p] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian-Bin Lin
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Wei Xue
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Bao-Ying Wang
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jun Tao
- State Key Laboratory of Physical
Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Wei-Xiong Zhang
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jie-Peng Zhang
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiao-Ming Chen
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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141
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Shongwe MS, Al-Zaabi UA, Al-Mjeni F, Eribal CS, Sinn E, Al-Omari IA, Hamdeh HH, Matoga D, Adams H, Morris MJ, Rheingold AL, Bill E, Sellmyer DJ. Accessibility and selective stabilization of the principal spin states of iron by pyridyl versus phenolic ketimines: modulation of the 6A1 ↔ 2T2 ground-state transformation of the [FeN4O2]+ chromophore. Inorg Chem 2012; 51:8241-53. [PMID: 22808945 DOI: 10.1021/ic300732r] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several potentially tridentate pyridyl and phenolic Schiff bases (apRen and HhapRen, respectively) were derived from the condensation reactions of 2-acetylpyridine (ap) and 2'-hydroxyacetophenone (Hhap), respectively, with N-R-ethylenediamine (RNHCH(2)CH(2)NH(2), Ren; R = H, Me or Et) and complexed in situ with iron(II) or iron(III), as dictated by the nature of the ligand donor set, to generate the six-coordinate iron compounds [Fe(II)(apRen)(2)]X(2) (R = H, Me; X(-) = ClO(4)(-), BPh(4)(-), PF(6)(-)) and [Fe(III)(hapRen)(2)]X (R = Me, Et; X(-) = ClO(4)(-), BPh(4)(-)). Single-crystal X-ray analyses of [Fe(II)(apRen)(2)](ClO(4))(2) (R = H, Me) revealed a pseudo-octahedral geometry about the ferrous ion with the Fe(II)-N bond distances (1.896-2.041 Å) pointing to the (1)A(1) (d(π)(6)) ground state; the existence of this spin state was corroborated by magnetic susceptibility measurements and Mössbauer spectroscopy. In contrast, the X-ray structure of the phenolate complex [Fe(III)(hapMen)(2)]ClO(4), determined at 100 K, demonstrated stabilization of the ferric state; the compression of the coordinate bonds at the metal center is in accord with the (2)T(2) (d(π)(5)) ground state. Magnetic susceptibility measurements along with EPR and Mössbauer spectroscopic techniques have shown that the iron(III) complexes are spin-crossover (SCO) materials. The spin transition within the [Fe(III)N(4)O(2)](+) chromophore was modulated with alkyl substituents to afford two-step and one-step (6)A(1) ↔ (2)T(2) transformations in [Fe(III)(hapMen)(2)]ClO(4) and [Fe(III)(hapEen)(2)]ClO(4), respectively. Previously, none of the X-salRen- and X-sal(2)trien-based ferric spin-crossover compounds exhibited a stepwise transition. The optical spectra of the LS iron(II) and SCO iron(III) complexes display intense d(π) → p(π)* and p(π) → d(π) CT visible absorptions, respectively, which account for the spectacular color differences. All the complexes are redox-active; as expected, the one-electron oxidative process in the divalent compounds occurs at higher redox potentials than does the reverse process in the trivalent compounds. The cyclic voltammograms of the latter compounds reveal irreversible electrochemical generation of the phenoxyl radical. Finally, the H(2)salen-type quadridentate ketimine H(2)hapen complexed with an equivalent amount of iron(III) to afford the μ-oxo-monobridged dinuclear complex [{Fe(III)(hapen)}(2)(μ-O)] exhibiting a distorted square-pyramidal geometry at the metal centers and considerable antiferromagnetic coupling of spins (J ≈ -99 cm(-1)).
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Affiliation(s)
- Musa S Shongwe
- Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al-Khod 123, Muscat, Sultanate of Oman.
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142
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Cavallini M. Status and perspectives in thin films and patterning of spin crossover compounds. Phys Chem Chem Phys 2012; 14:11867-76. [PMID: 22678094 DOI: 10.1039/c2cp40879a] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin crossover compounds are a class of functional materials able to switch their spin state upon external stimuli. They were proposed as potential candidates for several technological applications that require highly controlled thin films and patterns. Here we present a critical overview of the most important approaches for thin film growth and patterning of spin-crossover compounds, giving special attention to Fe(II) based molecules, which are the most studied materials. We present both conventional approaches to thin film growth (Langmuir-Blodgett, constructive chemical approach, spin coating, drop casting and vacuum sublimation) and patterning (combined top-down/bottom-up method, soft and unconventional lithography). We critically discuss the application of thin film growth and fabrication techniques highlighting the most critical aspects and the perspectives opened by the recent progress.
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Affiliation(s)
- Massimiliano Cavallini
- CNR-Istituto per lo Studio dei Materiali Nanostrutturati, Via P. Gobetti 101, 40121 Bologna, Italy.
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143
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144
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Gandolfi C, Morgan GG, Albrecht M. A magnetic iron(iii) switch with controlled and adjustable thermal response for solution processing. Dalton Trans 2012; 41:3726-30. [DOI: 10.1039/c2dt12037b] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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145
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Roberts TD, Tuna F, Malkin TL, Kilner CA, Halcrow MA. An iron(ii) complex exhibiting five anhydrous phases, two of which interconvert by spin-crossover with wide hysteresis. Chem Sci 2012. [DOI: 10.1039/c1sc00584g] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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146
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Sato O. Switchable molecular magnets. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2012; 88:213-225. [PMID: 22728438 PMCID: PMC3410140 DOI: 10.2183/pjab.88.213] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 03/16/2012] [Indexed: 06/01/2023]
Abstract
Various molecular magnetic compounds whose magnetic properties can be controlled by external stimuli have been developed, including electrochemically, photochemically, and chemically tunable bulk magnets as well as a phototunable antiferromagnetic phase of single chain magnet. In addition, we present tunable paramagnetic mononuclear complexes ranging from spin crossover complexes and valence tautomeric complexes to Co complexes in which orbital angular momentum can be switched. Furthermore, we recently developed several switchable clusters and one-dimensional coordination polymers. The switching of magnetic properties can be achieved by modulating metals, ligands, and molecules/ions in the second sphere of the complexes.
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Affiliation(s)
- Osamu Sato
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, Japan.
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147
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Bao X, Guo PH, Liu W, Tucek J, Zhang WX, Leng JD, Chen XM, Gural'skiy I, Salmon L, Bousseksou A, Tong ML. Remarkably high-temperature spin transition exhibited by new 2D metal–organic frameworks. Chem Sci 2012. [DOI: 10.1039/c2sc00924b] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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148
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Shongwe MS, Al-Rahbi SH, Al-Azani MA, Al-Muharbi AA, Al-Mjeni F, Matoga D, Gismelseed A, Al-Omari IA, Yousif A, Adams H, Morris MJ, Mikuriya M. Coordination versatility of tridentate pyridyl aroylhydrazones towards iron: tracking down the elusive aroylhydrazono-based ferric spin-crossover molecular materials. Dalton Trans 2012; 41:2500-14. [DOI: 10.1039/c1dt11407g] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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149
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Fujinami T, Nishi K, Matsumoto N, Iijima S, Halcrow MA, Sunatsuki Y, Kojima M. 1D and 2D assembly structures by imidazole···chloride hydrogen bonds of iron(II) complexes [Fe(II)(HL(n-Pr))3]Cl·Y (HL(n-Pr) = 2-methylimidazol-4-yl-methylideneamino-n-propyl; Y = AsF6, BF4) and their spin states. Dalton Trans 2011; 40:12301-9. [PMID: 21989504 DOI: 10.1039/c1dt11063b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two Fe(II) complexes fac-[Fe(II)(HL(n-Pr))(3)]Cl·Y (Y = AsF(6) (1) and BF(4) (2)) were synthesized, where HL(n-Pr) is 2-methylimidazole-4-yl-methylideneamino-n-propyl. Each complex-cation has the same octahedral N(6) geometry coordinated by three bidentate ligands and assumes facial-isomerism, fac-[Fe(II)(HL(n-Pr))(3)](2+) with Δ- and Λ-enantiomorphs. Three imidazole groups per Δ- or Λ-fac-[Fe(II)(HL(n-Pr))(3)](2+) are hydrogen-bonded to three Cl(-) ions or, from the viewpoint of the Cl(-) ion, one Cl(-) ion is hydrogen-bonded to three neighbouring fac-[Fe(II)(HL(n-Pr))(3)](2+) cations. The 3 : 3 NH···Cl(-) hydrogen bonds between Δ- or Λ-fac-[Fe(II)(HL(n-Pr))(3)](2+) and Cl(-) generate two kinds of assembly structures. The directions of the 3 : 3 NH···Cl(-) hydrogen bonds and hence the resulting assembly structures are determined by the size of the anion Y, though Y is not involved into the network structure and just accommodated in the cavity. Compound 1 has a 1D ladder structure giving a larger cavity, in which the Δ- and Λ-fac-[Fe(II)(HL(n-Pr))(3)](2+) enantiomorphs are bridged by two NH···Cl(-) hydrogen bonds. Compound 2 has a 2D network structure with a net unit of a cyclic trimer of {fac-[Fe(II)(HL(n-Pr))(3)](2+)···Cl(-)}(3) giving a smaller cavity, in which Δ- or Λ-fac-[Fe(II)(HL(n-Pr))(3)](2+) species with the same chirality are linked by NH···Cl(-) hydrogen bonds to give a homochiral 2D network structure. Magnetic susceptibility and Mössbauer spectral measurements demonstrated that compound 1 showed an abrupt one-step spin crossover with 4.0 K thermal hysteresis of T(c↓) = 125.5 K and T(c↑) = 129.5 K and compound 2 showed no spin transition and stayed in the high-spin state over the 5-300 K temperature range.
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Affiliation(s)
- Takeshi Fujinami
- Department of Chemistry, Faculty of Science, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
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150
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Yoshida K, Kosone T, Kanadani C, Saito T, Kitazawa T. Crystal structure and magnetic property of spin crossover complex FeII(3-phenylpyridine)2[AuI(CN)2]2. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.02.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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