2022
DOI: 10.1039/d2tc01103d
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Electrically responsive structural transformations triggered by vapour and temperature in a series of pleochroic bis(oxalato)chromium(iii) complex salts

Abstract: Stimuli-responsive structural transformations of metal-organic materials are attracting considerable attention due to their potential use in functional switchable devices. In this study, we describe the successful demonstration of a reversible...

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Cited by 6 publications
(9 citation statements)
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“…A similar effect is observed in recently reported bis(oxalato)chromium( iii ) complex salts, where crystals change the colour from purplish red to orange. 45…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…A similar effect is observed in recently reported bis(oxalato)chromium( iii ) complex salts, where crystals change the colour from purplish red to orange. 45…”
Section: Resultsmentioning
confidence: 99%
“…Such soft materials, whose properties and sensing are based on external triggers and environments, are attracting more attention recently. [43][44][45]…”
Section: Electrical Propertiesmentioning
confidence: 99%
“…[11][12][13] The flexibility of structures containing naturally occurring carboxylic acids, such as L-tartaric acid, has been demonstrated in several transition metal complexes that undergo reversible solid-state transformation upon exposure to moisture. [14][15][16][17][18][19] L-Tartaric acid serves several purposes as a ligand in coordination chemistry: it coordinates, chelates or bridges the metal centres, can be pH-adjusted to form different ionic species (−4 ≤ ionic charge ≤ 0) and contains sufficient functional groups to participate in non-covalent interactions that stabilize the structure. In most of the struc-tures found in the Cambridge Structural Database (CSD), 20 the L-tartrate ligand bridges the transition metal centres, leading either to extended polymeric structures, as in a series of isomorphous compounds {[M(NN)(L-tart-H 2 )]•xH 2 O} n (M 2+ = Mn, Co, Cu, and Zn; NN = 2,2′-bipyridine, 1,10-phenanthroline; L-tart-H 2 = dianion of L-tartaric acid; x = 5, 6), [21][22][23][24][25][26] or to isolated dinuclear complexes of the formula [{M(NN)} 2 (L-tart-H 2 )] (M 2+ = Pd and Pt).…”
Section: Introductionmentioning
confidence: 99%
“…The incorporation of multidentate ligands into the coordination sphere of metals is a well-known strategy for producing highly stable and structurally tunable supramolecular assemblies achieved through various noncovalent interactions between the desired molecular building blocks, inorganic anions, and other constituent units. , The use of naturally occurring substances in crystal engineering is a very convenient way to introduce flexibility into these crystalline solid-state products . However, the aforementioned flexibility in structure is in some cases the limiting factor when it comes to the stability of such compounds, i.e., they undergo various chemical or structural transformations depending on the environmental conditions and external stimuli, even if these stimuli mean only a slight change in temperature or humidity. On the other hand, from an application point of view, stimuli-responsiveness can be a very valuable property for the development of new devices and technologies. , In this sense, it is very important to optimize and test the conditions under which a particular structural transformation occurs and to establish the correct structure–property correlation. Since metal–organic compounds are usually produced under milder conditions compared to metal oxides, i.e., less energy is consumed, the mass fraction of metals, which are often expensive and scarce, is much lower, and they can be more easily recovered or recycled, and they could be considered in the coming years as an environmentally friendly and sustainable alternative to the materials currently used in devices.…”
Section: Introductionmentioning
confidence: 99%