Investigation into [4+6] porous organic cages and their use in porous liquids



Kearsey, Rachel
(2020) Investigation into [4+6] porous organic cages and their use in porous liquids. PhD thesis, University of Liverpool.

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Abstract

The field of porous liquids is relatively new compared to other porous materials but is rapidly developing and gaining interest. There is a diverse range of strategies in the literature to achieve porosity in the liquid state, including using porous organic cages as either soluble pores or neat liquid hosts. However, there are not enough examples to draw a comparison, so little is known about the design and limitations associated with these systems. In this thesis, we show how high-throughput automation can be applied to streamline discovery and expand the area of porous liquids with two different approaches. Firstly, the focus was on improving current systems and finding highly soluble porous organic cages in cavity-excluded solvents. This resulted in a library of porous liquids with increased cavity concentrations that allowed the exploration into how changing the solvent and cage components effects overall properties, such as gas uptake and viscosity. One problem associated with these soluble cages was the use of solvents with associated vapour pressure, which limits their study using gas sorption methods. Therefore, a second strategy was devised to explore low melting cage salts with large cavity-excluded anions. A high-throughput screen was developed that generated a small cage salt library with varying cages and counterions. The thermal behaviour of these systems was studied to determine the effect of changing these components on melting. Overall, the work carried out in this thesis developed high-throughput workflows that can be applied to larger screens and presented a series of design considerations for future systems.

Item Type: Thesis (PhD)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 29 Mar 2021 10:53
Last Modified: 18 Jan 2023 23:00
DOI: 10.17638/03115599
Supervisors:
  • Cooper, Andrew
  • Greenaway, Rebecca
URI: https://livrepository.liverpool.ac.uk/id/eprint/3115599