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Coordination cages selectively transport molecular cargoes across liquid membranes

DOI: 10.1021/jacs.1c04799 DOI Help

Authors: Bao-Nguyen T. Nguyen (University of Leeds) , John D. Thoburn (Randolph-Macon College) , Angela B. Grommet (University of Cambridge) , Duncan J. Howe (University of Cambridge) , Tanya K. Ronson (University of Cambridge) , Hugh P. Ryan (University of Cambridge) , Jeanne L. Bolliger (University of Cambridge) , Jonathan R. Nitschke (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: August 2021
Diamond Proposal Number(s): 21497

Open Access Open Access

Abstract: Chemical purifications are critical processes across many industries, requiring 10–15% of humanity’s global energy budget. Coordination cages are able to catch and release guest molecules based upon their size and shape, providing a new technological basis for achieving chemical separation. Here, we show that aqueous solutions of FeII4L6 and CoII4L4 cages can be used as liquid membranes. Selective transport of complex hydrocarbons across these membranes enabled the separation of target compounds from mixtures under ambient conditions. The kinetics of cage-mediated cargo transport are governed by guest binding affinity. Using sequential transport across two consecutive membranes, target compounds were isolated from a mixture in a size-selective fashion. The selectivities of both cages thus enabled a two-stage separation process to isolate a single compound from a mixture of physicochemically similar molecules.

Journal Keywords: Hydrocarbons; Liquids; Layers Membranes; Aromatic compounds

Subject Areas: Chemistry, Materials

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 09/08/2021 10:41


Discipline Tags:

Chemistry Materials Science Organic Chemistry Metallurgy Organometallic Chemistry

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD)