Structural Investigation of the Photoinduced Spin Transition in the [Fe(PM-BiA)₂(NCS)₂] Compound

Single-Laser-Shot-Induced Complete Bidirectional Spin Transition at Room Temperature in Single Crystals of (FeII(pyrazine)(Pt(CN)4))

“…It should be noted that such a simple mean-field model is useful to understand the different experimental observations, but it cannot be expected to reproduce quantitatively the photoinduced effects for various reasons. Notably, the material is regarded homogeneous in the frame of our theoretical approach, whereas PIPT should involve both nucleation and growth of many domains. – …”

Guest Tunable Structure and Spin Crossover Properties in a Nanoporous Coordination Framework Material

“…The development of functional materials with physical properties that can be controlled on the molecular level is an important goal for the realization of nanoscale devices. , To this end, spin crossover (SCO) materials, which show dramatic switching responses (including with bistability) to external perturbations (e.g., temperature, pressure, magnetic field, light, and guest/chemical environment), have been actively investigated. − While the SCO phenomenon itself has been known for more than 70 years and extensive understandings of the process developed, rational materials design in this area remains elusive due to the myriad solid state effects that influence SCO behavior. In an attempt to deconvolute these effects, extensive efforts have been devoted toward exploring the local influence of anion species, ligand functionality, and included guest molecules on SCO. ,− While some useful structure−property correlations have emerged, this approach has largely been frustrated by difficulties associated with preparing a broad series of analogous materials in which the crystal packing is not significantly altered. ,, The recent development of nanoporous spin crossover frameworks (SCOFs) provides a novel route to circumvent this problem, since the structural geometries of these materials are often only weakly perturbed by extra-framework species, which, in the case of neutral guests, may be conveniently exchanged in situ through desorption/sorption. − …”

Analysis of the Photomagnetic Properties of Cyano-Bridged Heterobimetallic Complexes by X-Ray Diffraction

“…Photomagnetic measurements show an increase in magnetization of the excited state of 1 of up to 3%, which is much diminished compared with previously published values of 45%. Furthermore, they show that the isostructural complex [La(DMF) 4 both showing an enhancement in the magnetic susceptibility upon visible and UV light illumination, respectively. 25,26 In an attempt to increase the excitation rate, new photocrystallographic experiments using synchrotron radiation have been performed for NdFeDMF (1) and six isostructural compounds.…”

“…Photocrystallography offers a new and unique insight into the three-dimensional structure of excited state crystal structures of solid state materials and by now has become an evolving branch of modern crystallography. − Many different types of photoswitchable effects such as ligand isomerizations − and spin transitions ,,,− have been investigated using this technique without any need for time-resolution. Other photoexcited processes require time-resolved studies, and excited state crystal structures with lifetimes in the micro- and picosecond range have also been investigated using photocrystallography. − …”