Pressure-induced liquid-liquid transition in a family of ionic materials

Liquid−liquid transition (LLT) between two disordered phases of single-component material remains one of the most intriguing physical phenomena. Here, we report a first-order LLT in a series of ionic liquids containing trihexyl(tetradecyl)phosphonium cation [P666,14]+ and anions of different sizes and shapes, providing an insight into the structure-property relationships governing LLT. In addition to calorimetric proof of LLT, we report that ion dynamics exhibit anomalous behavior during the LLT, i.e., the conductivity relaxation times (τσ) are dramatically elongated, and their distribution becomes broader. This peculiar behavior is induced by isobaric cooling and isothermal compression, with the τσ(TLL,PLL) constant for a given system. The latter observation proves that LLT, in analogy to liquid-glass transition, has an isochronal character. Finally, the magnitude of discontinuity in a specific volume at LLT was estimated using the Clausius-Clapeyron equation

Glycerol Carbonate

Datasets from SANDALS, RB1610258 Abstract: Glycerol carbonate has potential to become one of the most important sustainable chemical intermediates of the future. It has imprtant uses as a solvent, as a chemical, and as a route to enhancing the value of glycerol waste co-produced with biodiesel from vegetable oils. This experiment aims to determine the liquid structure and hydrogen-bonding present in liquid glycerol carbonate in order to understanding it's utility as a non-aqueous solvent. Public release date: 14 March 2019 Principal Investigator: Professor John Holbrey Experimenter: Dr Fergal Coleman Experimenter: Mr Yoan Delavoux Local Contact: Dr Sam Callear Experimenter: Dr Gosia Swadzba-Kwasny Experimenter: Professor Martin Atkins Experimenter: Mr Mark Gilmore DOI: 10.5286/ISIS.E.73948104 Parent DOI: 10.5286/ISIS.E.RB1610258 ISIS Experiment Number: RB1610258 Part Number: 1 download the dataset download the dataset Date of Experiment: 10 March 2016 Publisher: STFC ISIS Neutron and Muon Source Data format: RAW/Nexus Select the data format above to find out more about it. Data Citation The recommended format for citing this dataset in a research publication is as: [author], [date], [title], [publisher], [doi] For Example: Professor John Holbrey et al; (2016): Glycerol Carbonate, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.7394810

The synthesis of deuteriated tri-tert-butyl phosphine

The synthesis of deuteriated tri‐tert‐butyl phosphine is reported. This synthesis is an adaptation of the known procedure for tri‐tert‐butyl phosphine via a Grignard intermediate