Reversible ferromagnetic–antiferromagnetic transformation upon dehydration–hydration of the nanoporous coordination framework, [Co3(OH)2(C4O4)2]·3H2O

Kurmoo, Mohamedally; Kumagai, Hiroo; Chapman, Karena W.; Kepert, Cameron J.

doi:10.1039/b500614g

Cited by 196 publications

(114 citation statements)

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“…[20] More recently, some Prussian Blue analogues that exhibit both solvatomagnetic and solvatochromic effects upon a dehydration/hydration process have also been described by Ohkoshi, Hashimoto and coworkers. [21] In our group, we also reported a porous two-dimensional molecular coordination polymer, MOROF-1, which exhibits striking changes in its crystal structure, from an amorphous state when it is evacuated, to a crystalline state when it is selectively filled with ethanol or methanol solvent guest molecules.…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Modulation of a Purely Organic Open Framework by Selective Guest Inclusion

Maspoch

Domingo

Roques

et al. 2007

Chemistry A European J

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Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Modulation of a Purely Organic Open Framework by Selective Guest Inclusion

Maspoch

Domingo

Roques

et al. 2007

Chemistry A European J

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“…The high sensitivity of these materials is also evidenced by the modification of the transition temperature on oxidative addition reactions following gas sorption at metal sites that are far from the magnetic centres 18,19 . A different approach to tune the magnetic properties of porous solids consists of the modification of the magnetic ground state of the MOF, which can be achieved through gas sorption processes that subtly affect the geometry of either the bridge between metal centres 20 or the ligand substituents 21 . The change of the oxidation state of the metal centre 22 or the variation of the coordination number 23 on hydration/dehydration has also been used to modify the magnetic properties of porous materials.…”

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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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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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“…Here, we present a brief overview of the concept using examples from our work and the literature in which Guest@MOF results in novel electronic or optical properties. These include electrical conductivity, 6 enhanced energy transfer, 7 guest-tunable spin crossover, 8 reversible ferromagnetic-antiferromagnetic behavior, 9 resistance switching, 10 and thermoelectric behavior.…”

Section: Introductionmentioning

confidence: 99%

Guest molecules as a design element for metal–organic frameworks

2016

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The well-known synthetic versatility of metal-organic frameworks (MOFs) is rooted in the ability to predict the metal-ion coordination geometry and the vast possibilities to use organic chemistry to modify the linker groups. However, the use of molecules occupying the pores as a component of framework design has been largely ignored. Recent reports show that the presence of these so-called "guests" can have dramatic effects, even when they are a seemingly innocuous species such as water or polar solvents. We term these guests "noninnocent" when their presence alters the MOF in such a way as to create a new material with properties different from the MOF without the guests. Advantages of using guest molecules to impart new properties to MOFs include the relative ease of introducing new functionalities, the ability to modify the material properties at will by removing the guest or inserting different ones, and avoidance of the diffi culties associated with synthesizing new frameworks, which can be challenging even when the basic topology remains constant. In this article, we describe the "Guest@MOF" concept and provide examples illustrating its potential as a new MOF design element.

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Reversible ferromagnetic–antiferromagnetic transformation upon dehydration–hydration of the nanoporous coordination framework, [Co3(OH)2(C4O4)2]·3H2O

Abstract: Reversible crystal-to-crystal transformation accompanied by change from ferromagnetic to antiferromagnetic ground states at 8 K upon dehydration-rehydration of the nanoporous coordination framework [CoII3(OH)2(C4O4)2].3H2O.

Cited by 196 publications

References 30 publications

Structural and Magnetic Modulation of a Purely Organic Open Framework by Selective Guest Inclusion

Structural and Magnetic Modulation of a Purely Organic Open Framework by Selective Guest Inclusion

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

Guest molecules as a design element for metal–organic frameworks

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