Radiation damage as a source of information

The structural strain induced by temperature (`phonon pressure') and radiation damage (`defect pressure') is not necessarily correlated because of different underlying structural mechanisms. Here synchrotron experiments may provide new and yet unexplored opportunities. A recent publication by McMonagle et al. [(2024), Acta Cryst. B80, 13–18] is an excellent illustration of this.

High-throughput nanoscale crystallization of di­hydro­pyridine active pharmaceutical ingredients

The use of encapsulated nanodroplet crystallization, for high-throughput screening of a selection of di­hydro­pyridine active pharmaceutical ingredients, resulted in access to single component crystalline forms for all examples as well as the discovery of two novel solvates.

Lattice response to the radiation damage of molecular crystals: radiation-induced versus thermal expansivity

The interaction of intense synchrotron radiation with molecular crystals frequently modifies the crystal structure by inducing disorder. A second-rank tensor of radiation-induced lattice strain is proposed to characterize lattice susceptibility to the radiation.

Tailoring the dimensionality of metal complexes via ligand modifications

Lowering the flexibility of a dipodal N-donor ligand containing a benzene ring as a spacer, by increasing the number of methyl substituents, promotes the syn conformation of the ligand, which is required to obtain dinuclear, cyclic metal complexes.

Concomitant polymorphs of 2-imino-2H-chromene-3-carb­oxy­lic acid amide: experimental and quantum chemical study

Two concomitant polymorphs of 2-imino­coumarin-3-carboxamide were crystallized and studied. They have different crystal structures from the energetic viewpoint and proved to be stable to the external factors.

Zharchikhite, AlF(OH)₂: a novel structure type related to α-PbO₂

The crystal structure of zharchikhite, AlF(OH)₂, is solved here. Zharchikhite exhibits a novel structure type roughly related to α-PbO₂ structure type.

1D and 2D coordination polymers with a new rigid chelating linker: di­acetylenedisalicylic acid

An important direction of modern chemistry is the use of di­carb­oxy­lic organic acids with a rigid backbone as linker molecules for the synthesis of coordination polymers. As linker molecules, the derivatives of salicylic acid would have an advantage due to the undoubtedly stronger bonding with the metal cation due to formation of chelate complexes.