Factors Affecting Bubble Size in Ionic Liquids

This study reports on understanding the formation of bubbles in ionic liquids (ILs), with a view to utilising ILs more efficiently in gas capture processes. In particular, the impact of the IL structure on the bubble sizes obtained has been determined in order to obtain design principles for the ionic liquids utilised. 11 ILs were used in this study with a range of physico-chemical properties in order to determine parametrically the impact on bubble size due to the liquid properties and chemical moieties present. The results suggest the bubble size observed is dictated by the strength of interaction between the cation and anion of the IL and, therefore, the mass transport within the system. This bubble size – ILs structure–physical property relationship has been illustrated using a series of QSPR correlations. A predictive model based only on the sigma profiles of the anions and cations has been developed which shows the best correlation without the need to incorporate the physico-chemical properties of the liquids. Depending on the IL, selected mean bubble sizes observed were between 56.1 and 766.9 μm demonstrating that microbubbles can be produced in the IL allowing the potential for enhanced mass transport and absorption kinetics in these systems

A qualitative investigation of the impact of peer to peer online support for women living with Polycystic Ovary Syndrome

Background: Polycystic Ovary Syndrome is a common, chronic condition which affects women living with the condition both physically and psychologically. Social support may be beneficial to sufferers in coping with chronic conditions and the Internet is becoming a common place for accessing social support and information. The aim of this study was to consider the experiences of women living with Polycystic Ovary Syndrome who access and participate in an online support group discussion forum dedicated to issues surrounding this condition. Methods: Fifty participants responded to a series of open-ended questions via an online survey. Results: Thematic analysis revealed a number of empowering and disempowering experiences associated with online support group participation. The empowering processes reported by members of the group included: Connecting with others who understand; Access to information and advice; Interaction with healthcare professionals; Treatment-related decision making; Improved adjustment and management. In terms disempowering processes, only two were described by group participants: Reading about the negative experiences of others and Feeling like an outsider. Conclusions: For women living with Polycystic Ovary Syndrome, participation within an online support group may help to empower them in a range of important ways however, there may be some disempowering consequences

Understanding the effect of pressure on ionic liquid structure

Neutron datasets from ISIS, RB111008

Investigating Cation-Solute Hydrogen Bonding in Ionic Liquids

Neutron datasets from ISIS, RB 1320528 Investigating Cation-Solute Hydrogen Bonding in Ionic Liquids image of ISIS instrument Data collected on the NIMROD instrument at the ISIS facility Abstract: This proposal aims to extend the understanding of uracil-ionic liquid interactions, in particular the C¿H2¿¿¿O=C interaction postulated to exist in a recently published study. The work will extend our understanding of cooperative cation/anion effects in the solubilisation process, and is complementary to our previous studies involving glucose dissolution in ionic liquids. Uracil is one of the four nucleobases of RNA and has uses in drug delivery, as well as being a precursor to various pharmaceuticals itself. As such, its solvation structure in ionic liquids (which are also being considered as potential reaction or solvation media for pharmaceuticals) is of particular interest. We intend to resolve the local structure of the mixture around the cation, anion, and solute, but with particular focus on the ring hydrogens of the ionic liquid cation in order to probe possible H-bonding motifs. Public release date: 31 March 2017 Principal Investigator: Dr Tristan Youngs Experimenter: Mr Adam Turner Experimenter: Professor John Holbrey Experimenter: Dr Fergal Coleman Experimenter: Dr Sarah Norman Experimenter: Ms Jade McCune Experimenter: Dr Gosia Swadzba-Kwasny Experimenter: Ms Caithlin White DOI: 10.5286/ISIS.E.44928045 ISIS Experiment Number: RB1320528 Part Number: 1 download the dataset download the dataset Date of Experiment: 28 March 2014 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: Dr Tristan Youngs et al; (2014): Investigating Cation-Solute Hydrogen Bonding in Ionic Liquids, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.4492804

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

Liquid structure of ionic liquids with [NTf₂]⁻ anions, derived from neutron scattering

The liquid structure of three common ionic liquids (ILs) was investigated by neutron scattering for the first time. The ILs were based on the bis(trifluoromethanesulfonyl)imide anion, abbreviated in the literature as [NTf2]− or [TFSI]−, and on the following cations: 1-ethyl-3-methylimidazolium, [C2mim]+; 1-decyl-3-methylimidazolium, [C10mim]+; and trihexyl(tetradecyl)phosphonium, [P666,14]+. Comparative analysis of the three ILs confirmed increased size of nonpolar nanodomains with increasing bulk of alkyl chains. It also sheds light on the cation–anion interactions, providing experimental insight into strength, directionality, and angle of hydrogen bonds between protons on the imidazolium ring, as well as H–C–P protons in [P666,14]+, to oxygen and nitrogen atoms in the [NTf2]−. The new Dissolve data analysis package enabled, for the first time, the analysis of neutron scattering data of ILs with long alkyl chains, in particular, of [P666,14][NTf2]. Results generated with Dissolve were validated by comparing outputs from three different models, starting from three different sets of cation charges, for each of the three ILs, which gave convergent outcomes. Finally, a modified method for the synthesis of perdeuterated [P666,14][NTf2] has been reported, with the aim of reporting a complete set of synthetic and data processing approaches, laying robust foundations that enable the study of the phosphonium ILs family by neutron scattering.<br/