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Li G, Stefanczyk O, Jia F, Nagashima S, Kumar K, Imoto K, Tokoro H, Ohkoshi SI. Mechanical Exfoliation of Multilayer Pseudohalogen-Bridged Nanosheets. J Phys Chem Lett 2023; 14:10420-10426. [PMID: 37955968 DOI: 10.1021/acs.jpclett.3c02257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
The development of nanolayered materials is one of the greatest challenges in nanoscience. Until now, pseudohalogen-bridged nanosheets using the mechanical exfoliation method have not been reported. A state-of-the-art material, {[FeII(3-acetylpyridine)2][HgII(μ-SCN)4]}n (1), has been developed to achieve the goal. The compound forms a two-dimensional (2D) coordination polymer with weak out-of-plane van der Waals interactions and has an intrinsic tendency to form shear planes perpendicular to the crystallographic c-direction. These structural features predispose 1 to mechanical exfoliation realized by employing the "Scotch-tape method". As a result, nanosheets were fabricated and characterized by digital optical microscopy, scanning electron microscopy, and atomic force microscopy. The nanosheets were found to have a minimum thickness of ∼15 nm and a lateral size of several micrometers. As the first example of thiocyanato-bridged coordination nanosheets, these materials extend the scope of 2D materials and potentially pave the way toward developing nanolayered materials.
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Affiliation(s)
- Guanping Li
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Olaf Stefanczyk
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Fangda Jia
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shuntaro Nagashima
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Kunal Kumar
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenta Imoto
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroko Tokoro
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Jose R, Pal S, Rajaraman G. Unraveling the origin of the cooperative adsorption of carbon monoxide in an Fe(II) metal-organic framework. Chem Commun (Camb) 2023; 59:10315-10318. [PMID: 37548232 DOI: 10.1039/d3cc01185b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Using periodic DFT calculations, we have established the mechanism of the unusual cooperative adsorption of CO gas in an Fe-bistriazolate MOF observed previously. The binding of one CO molecule to FeII triggers structural alteration of the neighbouring Fe centres, reducing the steric energy penalty and aiding cooperative adsorption. This is similar to the entatic state concept proposed for metalloenzymes, and offers novel strategies for selective gas adsorption.
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Affiliation(s)
- Reshma Jose
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Sourav Pal
- Department of Chemistry, Ashoka University, Sonipat, Haryana, 131029, India.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
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3
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Li G, Stefanczyk O, Kumar K, Nakabayashi K, Ohkoshi SI. Nonlinear Optical and Magnetic Properties of Fe II-SCN-Hg II Isomers: Centrosymmetric Layers and Chiral Networks. Inorg Chem 2023; 62:3278-3287. [PMID: 36734995 DOI: 10.1021/acs.inorgchem.2c04382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Research on isomers is highly desirable due to their prospective role in better understanding of physicochemical properties of similar systems and further development of multifunctional molecular materials. Iron(II) and tetra(thiocyanato)mercury(II) ions self-assembled in the presence of 2-acetylpyridine (2-acpy) excess to form two {[Fe(2-acpy)][Hg(μ-SCN)4]}n isomers: two-dimensional (2D) centrosymmetric layers with folded ring structural motifs (1) and three-dimensional (3D) chiral networks with right- or left-handed {···Fe-NCS-Hg-SCN···}∞ helixes (2). New methods of designing and synthesizing functional thiocyanate-bridged materials have been proposed. In addition, the similarity between 1 and 2 allowed for the description of subtle changes in IR and UV-visible spectra. Moreover, 2 shows spontaneous resolution, and it crystallizes in the noncentrosymmetric space group P21, leading to the occurrence of nonlinear optical activity in circular dichroism studies and second harmonic generation (SHG). At room temperature, the SH susceptibility for powder sample 2 reached 6.0 × 10-11 esu. Ab initio calculations indicated the electric polarization vector and the crystallographic twofold screw axis pass through the aromatic ring. Magnetic studies for 1 and 2 revealed high-spin iron(II) with zero-field splitting at low temperatures. Analysis of magnetic data gave |D| = 37.45 cm-1, |E/D| = 5.59 cm-1, and ⟨g⟩ = 2.15 for 1, |D| = 36.78 cm-1, |E/D| = 4.92 cm-1, and ⟨g⟩ = 2.18 for 2, and information about the orientation of magnetic anisotropy vectors for both compounds.
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Affiliation(s)
- Guanping Li
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Olaf Stefanczyk
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Kunal Kumar
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Koji Nakabayashi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
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4
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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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Xie KP, Wu SG, Wang LF, Huang GZ, Ni ZP, Tong ML. A spin-crossover phenomenon in a 2D heterometallic coordination polymer with [Pd(SCN) 4] 2- building blocks. Dalton Trans 2021; 50:4152-4158. [PMID: 33688869 DOI: 10.1039/d1dt00244a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new two-dimensional (2D) coordination polymers, [FeII(L)2{PdII(SCN)4}] (L1 = 3-(9-anthracenyl)-pyridine (1) and L2 = 4-(9-anthracenyl)-pyridine (2)), were constructed by employing square-planar [Pd(SCN)4]2- building blocks. Compound 1 exhibits a complete spin-crossover (SCO) behaviour under normal atmospheric pressure, and represents the first SCO example in a 2D system containing [Pd(SCN)4]2- units. In contrast, compound 2 only shows paramagnetic behaviour at measured temperatures. It is clear that the fine-tuning of the monodentate ligand can modulate the ligand field and packing fashions, which sheds light on developing new SCO materials.
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Affiliation(s)
- Kai-Ping Xie
- 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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López-Moreno A, del Carmen Giménez-López M. Metallic-based magnetic switches under confinement. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2021. [DOI: 10.1016/bs.adomc.2021.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Tabe H, Matsushima M, Tanaka R, Yamada Y. Creation and stabilisation of tuneable open metal sites in thiocyanato-bridged heterometallic coordination polymers to be used as heterogeneous catalysts. Dalton Trans 2019; 48:17063-17069. [PMID: 31697295 DOI: 10.1039/c9dt03679b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of thiocyanato-bridged heterometallic coordination polymers with a 3D reticular network have been synthesised by the reaction of [PtIV(SCN)6]2- with MII ions to form {MII[PtIV(SCN)6]}n and {[MII(CH3OH)2][PtIV(SCN)6]}n (MII = MnII, FeII, CoII, NiII or CuII) in water and methanol, respectively. Single-crystal X-ray analyses revealed the absence of open metal sites in {MII[PtIV(SCN)6]}ns and the formation of potential open metal sites at the MII ions of {[MII(CH3OH)2][PtIV(SCN)6]}ns by the coordination of methanol. One of the two coordinating methanol molecules in {[CoII(CH3OH)2][PtIV(SCN)6]}n was replaced with pyridine to stabilise the open metal sites, because the methanol molecules are too labile to maintain open metal sites in water. The heterogeneous catalysis of coordination polymers with and without open metal sites was examined for organophosphate hydrolysis and photocatalytic water oxidation to clarify the requisites for heterogeneous catalysts.
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Affiliation(s)
- Hiroyasu Tabe
- Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan. and The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Masaaki Matsushima
- Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Rika Tanaka
- Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan. and Analytical Centre of Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Yusuke Yamada
- Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
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9
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Zhang D, Valverde-Muñoz FJ, Bartual-Murgui C, Piñeiro-López L, Muñoz MC, Real JA. {[Hg(SCN)3]2(μ-L)}2–: An Efficient Secondary Building Unit for the Synthesis of 2D Iron(II) Spin-Crossover Coordination Polymers. Inorg Chem 2018; 57:1562-1571. [DOI: 10.1021/acs.inorgchem.7b02906] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Daopeng Zhang
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
- College
of Chemical Engineering, Shandong University of Technology, Zibo 255049, People’s Republic of China
| | - Francisco Javier Valverde-Muñoz
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
| | - Carlos Bartual-Murgui
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
| | - Lucía Piñeiro-López
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, 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, E-46022 Valencia, Spain
| | - José Antonio Real
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
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10
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Sciortino NF, Ragon F, Zenere KA, Southon PD, Halder GJ, Chapman KW, Piñeiro-López L, Real JA, Kepert CJ, Neville SM. Exploiting Pressure To Induce a "Guest-Blocked" Spin Transition in a Framework Material. Inorg Chem 2016; 55:10490-10498. [PMID: 27709915 DOI: 10.1021/acs.inorgchem.6b01686] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new functionalized 1,2,4-triazole ligand, 4-[(E)-2-(5-methyl-2-thienyl)vinyl]-1,2,4-triazole (thiome), was prepared to assess the broad applicability of strategically producing multistep spin transitions in two-dimensional Hofmann-type materials of the type [FeIIPd(CN)4(R-1,2,4-trz)2]·nH2O (R-1,2,4-trz = a 4-functionalized 1,2,4-triazole ligand). A variety of structural and magnetic investigations on the resultant framework material [FeIIPd(CN)4(thiome)2]·2H2O (A·2H2O) reveal that a high-spin (HS) to low-spin (LS) transition is inhibited in A·2H2O due to a combination of guest and ligand steric bulk effects. The water molecules can be reversibly removed with retention of the porous host framework and result in the emergence of an abrupt and hysteretic one-step spin transition due to the removal of guest internal pressure. A spin transition can, furthermore, be induced in A·2H2O (0-0.68 GPa) under hydrostatic pressure, as evidenced by variable-pressure structure and magnetic studies, resulting in a two-step spin transition at ambient temperatures at 0.68 GPa. The presence of a two-step spin crossover (SCO) in A·2H2O under hydrostatic pressure compared to a one-step SCO in A at ambient pressure is discussed in terms of the relative ability of each phase to accommodate mixed HS/LS states according to differing lattice flexibilities.
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Affiliation(s)
- Natasha F Sciortino
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Florence Ragon
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Katrina A Zenere
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Peter D Southon
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Gregory J Halder
- X-ray Science Division, Advanced Photon Source (APS), Argonne National Laboratory , Lemont, Illinois 60439, United States
| | - Karena W Chapman
- X-ray Science Division, Advanced Photon Source (APS), Argonne National Laboratory , Lemont, Illinois 60439, United States
| | - Lucía Piñeiro-López
- Institut the Ciencia Molecular, Universitat de València , 46980 Paterna, València, Spain
| | - José A Real
- Institut the Ciencia Molecular, Universitat de València , 46980 Paterna, València, Spain
| | - Cameron J Kepert
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Suzanne M Neville
- School of Chemistry, The University of Sydney , Sydney, New South Wales 2006, Australia
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11
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Milin E, Belaïd S, Patinec V, Triki S, Chastanet G, Marchivie M. Dinuclear Spin-Crossover Complexes Based on Tetradentate and Bridging Cyanocarbanion Ligands. Inorg Chem 2016; 55:9038-46. [PMID: 27526047 DOI: 10.1021/acs.inorgchem.6b01542] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spin-crossover (SCO) Fe(II) dinuclear complexes of formula [Fe2(tmpa)2(μ2-tcpd)2]·0.8(CH3OH) (1·MeOH) and [Fe2(andmpa)2(μ2-tcpd)2]·2CH3OH (2·MeOH) (tmpa = tris(2-pyridylmethyl)amine, andmpa = bis(2-pyridylmethyl)aminomethyl)aniline, (tcpd)(2-) = 2-dicyanomethylene-1,1,3,3-tetracyanopropanediide) have been synthesized and characterized by infrared spectroscopy, X-ray diffraction, and magnetic measurements. The crystal structure determinations of the two complexes (1·MeOH and 2·MeOH) and the desolvated complex 1 (from 1·MeOH) revealed a neutral centrosymmetrical dinuclear structure in which the (tcpd)(2-) cyanocarbanion acts as a double μ2-bridging ligand between two [FeL](2+) (L = tmpa (1), andmpa (2)) units involving two free coordination sites in the cis configuration. Examination of the shortest intermolecular contacts in 1·MeOH and 1 reveals no significant hydrogen bonding between the dinuclear units, while in 2·MeOH these units are held together by significant hydrogen bonds between one of the uncoordinated nitrile groups and the anilate function, giving rise to 1D supramolecular structure. The three dinuclear complexes 1, 2·MeOH, and 2 exhibit SCO behaviors which have been evidenced by the thermal evolutions of the χmT product and by the average values of the six Fe-N distances for 1 and 2·MeOH, that reveal a gradual conversion with transition temperatures (T1/2) at ca. 352 K (1), 196 K (2), and 180 K (2·MeOH). For the solvated 1·MeOH, the sharp SCO transition observed around 365 K was induced by the desolvatation process above 330 K during the magnetic measurements.
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Affiliation(s)
- Eric Milin
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale , 6 Avenue V. Le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Sabrina Belaïd
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale , 6 Avenue V. Le Gorgeu, CS 93837, 29238 Brest Cedex 3, France.,Laboratoire de Physico-Chimie des Matériaux et Catalyse, Université de Béjaia , Béjaia, Algeria
| | - Véronique Patinec
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale , 6 Avenue V. Le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Smail Triki
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale , 6 Avenue V. Le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Guillaume Chastanet
- CNRS, Université Bordeaux, ICMCB , 87 Av. Doc. A. Schweitzer, F-33608 Pessac, France
| | - Mathieu Marchivie
- CNRS, Université Bordeaux, ICMCB , 87 Av. Doc. A. Schweitzer, F-33608 Pessac, France
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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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13
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Rodríguez-Velamazán JA, Fabelo O, Beavers CM, Natividad E, Evangelisti M, Roubeau O. A multifunctional magnetic material under pressure. Chemistry 2014; 20:7956-61. [PMID: 24807735 DOI: 10.1002/chem.201402046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Indexed: 11/10/2022]
Abstract
Fe(II)(Metz)6](Fe(III)Br4)2 (Metz = 1-methyltetrazole) is one of the rare systems combining spin-crossover and long-range magnetic ordering. A joint neutron and X-ray diffraction and magnetometry study allows determining its collinear antiferromagnetic structure, and shows an increase of the Néel temperature from 2.4 K at ambient pressure, to 3.9 K at 0.95 GPa. Applied pressure also enables a full high-spin to low-spin switch at ambient temperature.
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Affiliation(s)
- J Alberto Rodríguez-Velamazán
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC and Universidad de Zaragoza, Plaza San Francisco, 50009, Zaragoza, Spain; Institut Laue-Langevin, 38042 Grenoble Cedex, France.
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14
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Rodríguez-Velamazán JA, Cañadillas-Delgado L, Castro M, McIntyre GJ, Real JA. Temperature- and pressure-dependent structural study of {Fe(pmd)2[Ag(CN)2]2}n spin-crossover compound by neutron Laue diffraction. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2014; 70:436-43. [PMID: 24892590 DOI: 10.1107/s2052520614003023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/10/2014] [Indexed: 11/11/2022]
Abstract
The effect of pressure (up to 0.17 GPa) on the spin-crossover compound {Fe(pmd)2[Ag(CN)2]2}n [orthorhombic isomer (II), pmd = pyrimidine] has been investigated by temperature- and pressure-dependent neutron Laue diffraction and magnetometry. The cooperative high-spin ↔ low-spin transition, centred at ca 180 K at ambient pressure, is shifted to higher temperatures as pressure is applied, showing a moderate sensitivity of the compound to pressure, since the spin transition is displaced by ca 140 K GPa(-1). The space-group symmetry (orthorhombic Pccn) remains unchanged over the pressure-temperature (P-T) range studied. The main structural consequence of the high-spin to low-spin transition is the contraction of the distorted octahedral [FeN6] chromophores, being more marked in the axial positions (occupied by the pmd units), than in the equatorial positions (occupied by four [Ag(CN)2](-) bridging ligands).
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Affiliation(s)
| | - Laura Cañadillas-Delgado
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Miguel Castro
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Garry J McIntyre
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble, France
| | - José Antonio Real
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, E-46980 Valencia, Spain
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Hazari A, Das LK, Bauzá A, Frontera A, Ghosh A. The influence of H-bonding on the ‘ambidentate’ coordination behaviour of the thiocyanate ion to Cd(ii): a combined experimental and theoretical study. Dalton Trans 2014; 43:8007-15. [DOI: 10.1039/c3dt53318b] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The importance of H-bonding in stabilizing the unusual S-coordination of the thiocyanate ion to Cd(ii) in hetero-metallic Cu2Cd compounds has been established by structural analyses and DFT studies.
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Affiliation(s)
- Alokesh Hazari
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata-700 009, India
| | - Lakshmi Kanta Das
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata-700 009, India
| | - Antonio Bauzá
- Department of Chemistry
- Universitat de les Illes Balears
- 07122 Palma de Mallorca, Spain
| | - Antonio Frontera
- Department of Chemistry
- Universitat de les Illes Balears
- 07122 Palma de Mallorca, Spain
| | - Ashutosh Ghosh
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata-700 009, India
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Setifi F, Milin E, Charles C, Thétiot F, Triki S, Gómez-García CJ. Spin crossover iron(II) coordination polymer chains: syntheses, structures, and magnetic characterizations of [Fe(aqin)2(μ2-M(CN)4)] (M = Ni(II), Pt(II), aqin = quinolin-8-amine). Inorg Chem 2013; 53:97-104. [PMID: 24358979 DOI: 10.1021/ic401721x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New Fe(II) coordination polymeric neutral chains of formula [Fe(aqin)2(μ2-M(CN)4)] (M = Ni(II) (1) and Pt(II) (2)) (aqin = Quinolin-8-amine) have been synthesized and characterized by infrared spectroscopy, X-ray diffraction, and magnetic measurements. The crystal structure determinations of 1-2 reveal in both cases a one-dimensional structure in which the planar [M(CN)4](2-) (M = Ni(II) (1) and Pt(II) (2)) anion acts as a μ2-bridging ligand, and the two aqin molecules as chelating coligands. Examination of the intermolecular contacts in the two compounds reveals that the main contacts are ascribed to hydrogen bonding interactions involving the amine groups of the aqin chelating ligands and the nitrogen atoms of the two non bridging CN groups of the [M(CN)4](2-) (M = Ni(II) (1) and Pt(II) (2)) anion. The average values of the six Fe-N distances observed respectively at room temperature (293 K) and low temperature (120 K), that is, 2.142(3) and 2.035(2) Å for 1, and 2.178(3) and 1.990(2) Å for 2, and the thermal variation of the cell parameters (performed on 2) are indicative of the presence of an abrupt HS-LS spin crossover (SCO) transition in both compounds. The thermal dependence of the product of the molar magnetic susceptibility times the temperature (χmT), in cooling and warming modes, confirms the SCO behavior at about 145 and 133 K in 1 and 2, respectively, and reveals the presence of a small thermal hysteresis of about 2 K for each compound.
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Affiliation(s)
- Fatima Setifi
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale , BP 809, 29285 Brest Cedex, France
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17
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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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18
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Ababei R, Pichon C, Roubeau O, Li YG, Bréfuel N, Buisson L, Guionneau P, Mathonière C, Clérac R. Rational Design of a Photomagnetic Chain: Bridging Single-Molecule Magnets with a Spin-Crossover Complex. J Am Chem Soc 2013; 135:14840-53. [DOI: 10.1021/ja407570n] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rodica Ababei
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
- CNRS, ICMCB, UPR 9048, F-33600 Pessac, France
- Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France
| | - Céline Pichon
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Olivier Roubeau
- Instituto de Ciencia
de Materiales de Aragón (ICMA), CSIC and Universidad de Zaragoza, Plaza San
Francisco s/n, 50009 Zaragoza, Spain
| | - Yang-Guang Li
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Nicolas Bréfuel
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Lionel Buisson
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Philippe Guionneau
- CNRS, ICMCB, UPR 9048, F-33600 Pessac, France
- Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France
| | - Corine Mathonière
- CNRS, ICMCB, UPR 9048, F-33600 Pessac, France
- Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France
| | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
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Setifi F, Charles C, Houille S, Thétiot F, Triki S, Gómez-García CJ, Pillet S. Spin crossover (SCO) iron(II) coordination polymer chain: Synthesis, structural and magnetic characterizations of [Fe(abpt)2(μ-M(CN)4)] (M=PtII and NiII). Polyhedron 2013. [DOI: 10.1016/j.poly.2013.06.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chiruta D, Linares J, Garcia Y, Dahoo PR, Dimian M. Analysis of the Hysteretic Behaviour of 3D Spin Crossover Compounds by Using an Ising-Like Model. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300412] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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