Heat Engine Drives Transport of an FeII 4 L4 Cage and Cargo.


Type
Article
Change log
Authors
Nguyen, Bao-Nguyen T 
Grommet, Angela B 
Tron, Arnaud 
Georges, Maureen CA 
Nitschke, Jonathan R  ORCID logo  https://orcid.org/0000-0002-4060-5122
Abstract

The directed motion of species against a chemical potential gradient is a fundamental feature of living systems, underpinning processes that range from transport through cell membranes to neurotransmission. The development of artificial active cargo transport could enable new modes of chemical purification and pumping. Here, a heat engine is described that drives chemical cargo between liquid phases to generate a concentration gradient. The heat engine, composed of a functionalized FeII 4 L4 coordination cage, is grafted with oligoethylene glycol imidazolium chains. These chains undergo a conformational change upon heating, causing the cage and its cargo to reversibly transfer between aqueous and organic phases. Furthermore, sectional heating and cooling allow for the cage to traverse multiple phase boundaries, allowing for longer-distance transport than would be possible using a single pair of phases.

Description
Keywords
metal organic cages, molecular cargo transport, phase transfer, supramolecular chemistry, thermally responsive materials
Journal Title
Adv Mater
Conference Name
Journal ISSN
0935-9648
1521-4095
Volume Title
32
Publisher
Wiley
Sponsorship
European Research Council (695009)
Engineering and Physical Sciences Research Council (EP/P027067/1)