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Guest Encapsulation within Surface‐Adsorbed Self‐Assembled Cages
Author(s) -
Ryan Hugh P.,
Haynes Cally J. E.,
Smith Alyssa,
Grommet Angela B.,
Nitschke Jonathan R.
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202004192
Subject(s) - adsorption , materials science , reagent , nanotechnology , molecule , catalysis , solid surface , self assembly , solid state , encapsulation (networking) , cage , chemical engineering , combinatorial chemistry , chemical physics , organic chemistry , chemistry , computer science , computer network , engineering , mathematics , combinatorics
Abstract Coordination cages encapsulate a wide variety of guests in the solution state. This ability renders them useful for applications such as catalysis and the sequestration of precious materials. A simple and general method for the immobilization of coordination cages on alumina is reported. Cage loadings are quantified via adsorption isotherms and guest displacement assays demonstrate that the adsorbed cages retain the ability to encapsulate and separate guest and non‐guest molecules. Finally, a system of two cages, adsorbed on to different regions of alumina, stabilizes and separates a pair of Diels–Alder reagents. The addition of a single competitive guest results in the controlled release of the reagents, thus triggering their reaction. This method of coordination cage immobilization on solid phases is envisaged to be applicable to the extensive library of reported cages, enabling new applications based upon selective solid‐phase molecular encapsulation.