Pressure-Tuning of Magnetism and Linkage Isomerism in Iron(II) Hexacyanochromate

Coronado, Eugenio; Giménez-López, M. Carmen; Levchenko, G. G.; Romero, Francisco M.; García-Baonza, Valentín; Milner, and Alla; Paz-Pasternak§, Moshe

doi:10.1021/ja043166z

Cited by 187 publications

(119 citation statements)

References 16 publications

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“…In addition, the MeOH molecules that complete the coordination sphere in 1 are displaced during the sorption process. The resultant hydrogen-bonded salt comprises distorted tetrahedral [CuCl 4 ] 2 − anions and (H 2 pyimH) 2 + cations that form a 2D network of (6,3) topology in which each cation interacts with three anions via two N-H···Cl-Cu hydrogen bonds (H···Cl 2.162 and 2.184 Å) and one asymmetrically bifurcated N-H···Cl 2 Cu hydrogen bond (H···Cl 2.383 and 2.798 Å) (Fig. 1).…”

Section: Synthesis and Structure Of Non-porous Coordination Polymermentioning

confidence: 99%

“…In this area, coordination chemistry is having a key role by providing remarkable examples of molecule-based materials in which magnetic properties can be reversibly tuned at low temperatures through a physical stimulus, such as light 1,2 or pressure 3,4 . With the recent explosion in research on metal organic frameworks (MOFs) [5][6][7][8][9][10] , the use of a chemical stimulus such as gas sorption to affect the magnetic properties of a porous coordination polymer has also been explored 11 .…”

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confidence: 99%

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Tuning the magneto-structural properties of non-porous coordination polymers by HCl chemisorption

et al. 2012

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Responsive materials for which physical or chemical properties can be tuned by applying an external stimulus are attracting considerable interest in view of their potential applications as chemical switches or molecular sensors. A potential source of such materials is metalorganic frameworks. These porous coordination polymers permit the physisorption of guest molecules that can provoke subtle changes in their porous structure, thus affecting their physical properties. Here we show that the chemisorption of gaseous HCl molecules by a nonporous one-dimensional coordination polymer instigates drastic modifications in the magnetic properties of the material. These changes result from profound structural changes, involving cleavage and formation of covalent bonds, but with no disruption of crystallinity.

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Section: Synthesis and Structure Of Non-porous Coordination Polymermentioning

confidence: 99%

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confidence: 99%

Tuning the magneto-structural properties of non-porous coordination polymers by HCl chemisorption

et al. 2012

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“…However, by increasing the temperature, a drop in the magnetization is observed at temperatures where the thermal energy is enough to allow for a relaxation to the stable LS state [24]. Apart from temperature and light, chemical [25], electrical [26], or pressure [27] stimuli have also been used to induce a spin crossover. Several stimuli have been used to trigger magnetic properties changes [3] in three main areas: (i) changing the spin state of a transition metal in spin crossover (SCO) systems [4][5][6][7][8][9][10][11]; (ii) switching the exchange interaction between different spin carriers [12,13]; and (iii) switching single-molecule magnet (SMM) properties [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…However, by increasing the temperature, a drop in the magnetization is observed at temperatures where the thermal energy is enough to allow for a relaxation to the stable LS state [24]. Apart from temperature and light, chemical [25], electrical [26], or pressure [27] stimuli have also been used to induce a spin crossover. Multi-metallic complexes such as Prussian-blue analogues have also attracted a wide interest as switchable systems due to the ability to switch the exchange interaction between different spin carriers connected by a bridging cyanide ligand.…”

Section: Introductionmentioning

confidence: 99%

Switching Magnetic Properties by a Mechanical Motion

et al. 2018

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Switching magnetic properties have attracted a wide interest from inorganic chemist for the objectives of information storage and quantum computing at the molecular level. This review is focused on magnetic switches based on a mechanical motion, which is an innovative approach. Three main strategies to control magnetic properties by a mechanical motion have been developed in the literature and will be described. The first one (ligand-induced spin change) consists in modulating the ligand field strength by a configuration change of the ligand in spin-crossover complexes. The second one (coordination-induced spin-state switching) is based on a change in the coordination number of a metallic center that is triggered by the motion of one ligand. The third one uses the modulation of the exchange interaction between two spin-centers by a mechanical motion.

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“…12,13 Stimuli-responsive electrical materials, mainly centred on organic conductive polymers, 14 are currently of high interest. A recent example of a thin-film device based on the porous coordination polymer Cu 3 (BTC) 2 (BTC = benzene-1,3,5-tricarboxylic acid) has shown an electrical response to 7,7,8,8-tetracyanoquinododimethane (TCNQ) guest molecules.…”

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Reversible stimulus-responsive Cu(i) iodide pyridine coordination polymer

et al. 2015

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We present a structurally flexible copper-iodide-pyridine-based coordination polymer showing drastic variations in its electrical conductivity driven by temperature and sorption of acetic acid molecules. The dramatic effect on the electrical conductivity enables the fabrication of a simple and robust device for gas detection. X-ray diffraction studies and DFT calculations allow the rationalisation of these observations.In recent years, coordination polymers (CPs) have gained increasing attention due to their wide structural variety and interesting physico-chemical properties. 1 They are a potential source of multifunctional materials that can bring remarkable physical properties such as luminescence, 2 non-linear optics, 3 magnetism 4 and electrical conductivity. 5 CPs have the ability to produce dynamic structures due to the structural flexibility of the ligands and/or the ability of the coordination sites to exchange, release and/or re-accommodate molecules, rendering CPs as a source of stimuli-responsive materials. 6 These dynamic materials show potential applications as chemical switches, memories or molecular sensors.A limited number of CPs have shown spin-crossover transitions modulated or induced by a chemical stimulus such as gas or solvent sorption in the pores 7-11 and magnetic, physically-driven solid-state transformation. 12,13 Stimuli-responsive electrical materials, mainly centred on organic conductive polymers, 14 are currently of high interest. A recent example of a thin-film device based on the porous coordination polymer Cu 3 (BTC) 2 (BTC = benzene-1,3,5-tricarboxylic acid) has shown an electrical response to 7,7,8,8-tetracyanoquinododimethane (TCNQ) guest molecules. 15 Quasi-linear physical properties have also been reported for MX and MMX chains (M = transition metal, X = halide), some of them showing thermal Peierls transitions that affect their magnetic properties 16 and/or their electrical conductivity. 17 Additionally, we have reported that some double-stranded Cu-halide stairs present interesting physical properties. 18 Here we disclose two 1D-CP polymorphs of Cu(I) with iodide as bridging ligands and 2-amino-5-nitropyridine (C 5 H 5 N 3 O 2 , ANP) as terminal ligands. These polymorphs show very flexible structures that enable a reversible physically-driven electrical conductive transition with electrical bi-stability close to room temperature and a chemicallydriven transition that induces a dramatic enhancement of the electrical conductivity, allowing the fabrication of a simple and robust gas-detection device.The direct reactions carried out between CuI and ANP at 25 1C or under solvothermal conditions lead to the isolation of [Cu(C 5 H 5 N 3 O 2 )I] n (1) and its polymorph 1a, respectively. 1a is isostructural to the Br derivative, also prepared under solvothermal conditions. 19 Both polymorphs show a double-stranded stair motif in which the Cu(I) centres are bridged by m 3 -I. Since the electrical properties (see below) of compound 1 indicate a phase transition at ca. 267-282 K, we h...

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Pressure-Tuning of Magnetism and Linkage Isomerism in Iron(II) Hexacyanochromate

Cited by 187 publications

References 16 publications

Tuning the magneto-structural properties of non-porous coordination polymers by HCl chemisorption

Tuning the magneto-structural properties of non-porous coordination polymers by HCl chemisorption

Switching Magnetic Properties by a Mechanical Motion

Reversible stimulus-responsive Cu(i) iodide pyridine coordination polymer

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