Materials Chemistry

Shining a Light on Photoresponsive Type III Porous Liquids



Porous materials are the subject of extensive research because of potential applications in areas such as gas adsorption and molecular separations. Until recently, most porous materials were solids, but there is now an emerging class of materials known as porous liquids. The incorporation of intrinsic porosity or cavities in a liquid can result in free-flowing materials that are capable of gas uptakes that are significantly higher than conventional non-porous liquids. A handful of porous liquids have also been investigated for gas separations. Until now, the release of gas from porous liquids has relied on molecular displacement (e.g., by adding small solvent molecules), pressure or temperature swings, or sonication. Here, we explore a new method of gas release that involves photoisomerisable porous liquids comprising a photoresponsive MOF dispersed in an ionic liquid. This results in the selective uptake of CO2 over CH4, and allows gas release to be controlled by using UV light.


Thumbnail image of Brand et al - Photoresponsive Type III Porous Liquids - Non-templated Manuscript.pdf

Supplementary material

Thumbnail image of Brand et al - Photoresponsive Type III Porous Liquids - ESI.pdf
Supporting Information
Contains synthesis and characterisation, and details of the gas adsorption setup and studies.

Supplementary weblinks

Design files for sorption photoreactor
3D printable files of sorption photoreactor - compatible with 9 mm sorption tubes