Themed collection Open Access in CrystEngComm

Replacing Ba²⁺ by Sr²⁺ stabilizes the high temperature phase and leads to zero or negative thermal expansion. Replacing Zn²⁺ by Mg²⁺ or Co²⁺, Ni²⁺, Mn²⁺, Cu²⁺ shifts the phase transition to higher temperatures and leads to high thermal expansion.

Despite recent advances, fundamental knowledge of the properties, thermodynamics and kinetics of mesoscale clusters, and their role in nucleation, is still limited.

Crystal structure of the homologues series of (InGaZnO₃)_m(ZnO)_n.

Platy particles of NaNbO₃ were successfully prepared by a solvothermal reaction using a methanol/ethanol mixed solvent, in contrast to the formation of cubic NaNbO₃ particles from methanol alone.

A method for routine molecular crystal structure determination on very small (typically <0.1 mg) amounts of crystalline material using powder X-ray diffraction data from a laboratory-based single-crystal diffractometer is reported.

The energy-efficient microwave-induced-metal-plasma (MIMP) approach leads to the sustainable synthesis of Mg₂Si and Mg₂Ge within 1 min from mixtures of the elemental powders.

Co-crystallization of PAHs with a polyhalogenated co-former afforded three novel co-crystals, which display remarkable features such as mechanochemical interconversion, photoreactivity, excimer fluorescence, and RTP phosphorescence in the solid state.

A pseudopolymorphism of two novel melamine – salicylic complexes and an example of a salt co-crystal structure.

For the first time mercaptopyridine co-crystals are reported as a result of the cross-crystallization of two mercaptopyridines with thiourea and trithiocyanuric acid. In one case, the co-crystal was needed to be obtained under dark room conditions.

Surface crystallisation yields an unknown polymorph of the phenoxazine molecule. Tuning the crystallisation conditions causes a defined crystal growth of either the thermodynamically stable phase or the kinetic phase observed exclusively within thin films.

The different macroscopic properties of closely related isoflavones were associated with the occurrence of intermolecular interactions and different torsion angles in the solid-state.

The degree of isostructurality of seven coordination polymers and the effect of metal ions on their properties were studied. Crystallographic, photoluminescence, NLO and thermoelectric analyses of the entire series were carried out.

Glasses from the system Na₂O–Y₂O₃–SiO₂ with different concentrations of ZrO₂ were studied concerning phase formation and crystallization behavior.

Fourth-order kinetics arises from the consecutive complexation leading to precipitation.

p-Sulfonatocalix[4]arene dimers encapsulate mono- and multicharged imidazolium guests within antiparallel bilayer arrays, in one case forming unusual hydrated nanoscale channels that span this common arrangement.

We demonstrate here using a disulfide system the first example of reversible, selective, and quantitative transformation between three crystalline polymorphs by ball mill grinding.

Nanowires and perovskite crystallites form in the initial stages of hydrothermal synthesis. In continuation, the perovskite dissolves at lower NaOH concentrations, whereas at the higher concentrations the perovskite transforms to the nanoplatelets.

A 2D halogen bonded network of calixarene macrocycles was obtained by co-crystallization of a 1,3-alternate calix[4]arene as a tetravalent XB donor with a bidentate XB acceptor.

The hexagonal motifs dictated by the {Cu₃} pyrazolate triangular units are joined together by the additional connectivity of the various alternating zinc (oxo)carboxylate units to form 2D/3D open structures (* relates the same example-structure).

The presence of non-innocent chromophore ligands in photoswitches can limit functionality. This photocrystallographic study shows how the negative impact of such ligands can be mitigated by control of excitation conditions, maximising photoswitching.