The effects of extreme conditions on molecular solids
Welcome to this themed issue of CrystEngComm entitled: ‘The effects of extreme conditions on molecular solids’.
A structural exploration of anisole accessed through extreme crystallisation conditions
A novel high pressure polymorph of anisole has been discovered and investigated with respect to the known low temperature form.
Dielectric properties and the role of grain boundaries in polycrystalline tetracene at high pressures
Dielectric properties and the role of grain boundaries in polycrystalline tetracene under pressure were investigated using impedance and computational methods.
Structural investigation and compression of a co-crystal of indomethacin and saccharin
Indomethacin : saccharin cocrystal has been studied under high pressure conditions and the amide interactions compared with previous high pressure studies.
Paper
The high-pressure and low-temperature structural behaviour of 2,2,2-trifluoroethanol
Polymorphic crystal structures have been determined for 2,2,2-trifluoroethanol by using the in situ crystallography techniques of high pressure and cryo-cooling.
Effect of pressure on slit channels in guanine sodium salt hydrate: a link to nucleobase intermolecular interactions
The crystal structure of a hydrate of the sodium salt of guanine (2Na+·C5H3N5O2−·7H2O) was studied at high pressure by single-crystal X-ray diffraction and Raman spectroscopy.
Paper
High-pressure polymorphism in L-threonine between ambient pressure and 22 GPa
The amino acid L-threonine undergoes three phase transitions between ambient pressure and 22.3 GPa which modify both hydrogen bonding and the molecular conformation.
Antisolvent addition at extreme conditions
Antisolvent addition at high pressure (0.8 GPa) allows crystallization and recovery to ambient pressures of metastable form II paracetamol.
High-pressure crystallisation studies of biodiesel and methyl stearate
The widespread use of biodiesel as a renewable fuel offers many potential advantages, but at the same time presents challenges for modern internal combustion engines, particularly for those that involve high-pressure injection of fuel into the combustion chamber.
Molybdenum and rhenium disulfide synthesis via high-pressure carbonate melt
A new method is shown for the crystallisation of molybdenum and rhenium disulfide from high pressure liquid carbonate flux. Crystal size ranges from 10s to 100s of micrometres.
Structure and reactivity of 2,4,6-tricyano-1,3,5-triazine under high-pressure conditions
2,4,6-Tricyano-1,3,5-triazine is an attractive precursor for the synthesis of extended layered and nanoporous carbon nitrides.
Effects of pressure on the structure and lattice dynamics of α-glycine: a combined experimental and theoretical study
This concomitant experimental and theoretical study provides a definitive EOS for α-glycine up to the record pressure of 50 GPa.
Structural behaviour of OP-ROY at extreme conditions
A highly-flexible organic molecule, with numerous polymorphs at ambient conditions, shows remarkable metastability, resisting the effects of extreme pressure and temperature.
About this collection
This themed issue on ‘The effects of extreme conditions on molecular solids’ delves into the realm of high pressure and celebrates the advances that have been made over the past few years. The breadth of systems investigated in this issue demonstrate an increase in complexity as well as the advancements in techniques that have enabled this to occur.
Iain D. H. Oswald and Christine M. Beavers (Guest Editors)