No abstract

No abstract

Diverse functional potential of heterometallic systems based on octacyanidometallates places them at the forefront of research into modern molecule-based materials.

No abstract

The aim and the scope of this review is to show the results of ten years of research following the first reports on magnetic and photomagnetic assemblies constructed from. It is illustrated on the basis of our own work as well as a wide range of studies carried out in numerous laboratories around the world. The diversity and evolution of topological and structural patterns is discussed alongside synthetic strategies, which led to the establishment of regular magnetostructural correlations in selected 3D systems. Different types of functionality observed in solid phases are presented with special attention devoted to tuning of magnetic

The design and construction of switchable materials attracts tremendous interest owing to the potential in information storing and processing or molecular sensing. [1][2][3][4] The archetypal examples involve a diversity of Fe II -, [5,6] Fe III - [7] or Co IIbased [8][9][10] spin-crossover (SCO) compounds, Co III/II -catecholate/semiquinone systems, [1,11] as well as d-d bimetallic and sd-d trimetallic cyanide-bridged systems revealing chargetransfer-induced spin transitions (CTIST). [12][13][14][15][16][17][18] Some of these compounds, for example Prussian blue analogues, are particularly promising from the point of view of photoswitching between nonmagnetic and magnetized (that is, T B , T C ) states, owing to magnetic coupling through molecular bridges in discrete species [14,15] and extended networks. [17,18] Such bistability also emerged in the magnetochemistry of octacyanidometalates, exploiting metal-to-metal electron transfer in HS Co II L[W V (CN) 8 ] 3À (L = pyrimidine, 4-methylpyridine) [19,20] or canonical SCO in Fe II L[Nb IV (CN) 8 ] 4À extended networks [21] (L = 4-pyridinealdoxime). A magnetic hysteresis loop with a coercivity of 1-3 T were observed in an optically excited low-temperature metastable phase.

A bimetallic pentadecanuclear cyanido-bridged {Fe9[W(CN)8]6 (MeOH)24}·xMeOH cluster of an Fe(II/III)-W(IV/V) mixed valence nature, reveals a reversible single-crystal-to-single-crystal transformation, concomitant with metal-to-metal charge transfer between Fe and W ions. The dominance of (HS)Fe(II)-NC-W(V) units at a high temperature, and (HS)Fe(III)-NC-W(IV) units at a low temperature, leads to an unprecedented reversed thermal hysteresis loop in magnetic measurements.

No abstract