Structural transformations and stability of benzo[a]pyrene under high pressure

This study explores the high-pressure behavior of benzo[a]pyrene, revealing two previously unknown polymorphs at 4.8 and 7.1 GPa. These findings enhance our understanding of the structural dynamics and stability of polycyclic aromatic hydrocarbons under extreme conditions.

Tracking anharmonic oscillations in the structure of β-1,3-di­acetylpyrene

A recently discovered β polymorph of 1,3-diacetylpyrene has turned out to be a prominent negative thermal expansion material. Its unique properties can be linked to anharmonic oscillations in the crystal structure. The onset and development of anharmonic behavior have been successfully tracked over a wide temperature range by single-crystal X-ray diffraction experiments. Sufficient diffraction data quality combined with modern quantum crystallography tools allowed a thorough analysis of the elusive anharmonic effects for a moderate-scattering purely organic compound.

Exploiting fourth-generation synchrotron radiation for enzyme and photoreceptor characterization

(Time-resolved) macromolecular crystallography at the new ID29 beamline at the ESRF is described.

Structure of an ex vivo Drosophila TOM complex determined by single-particle cryoEM

A 3.3 Å resolution map and structural model of the TOM complex from Drosophila melanogaster were determined by single-particle cryoEM. The complex was extracted from native membranes of the fly retina following targeted expression of a Tom40 transgene.

Incommensurately modulated structure of Zn₄Si₂O₇(OH)₂·H₂O at high pressure

Refinement of the hemimorphite crystal structure using single-crystal synchrotron X-ray diffraction data collected at high pressure revealed a structural phase transition into an incommensurately modulated structure, accompanied by the appearance of satellite reflections.