Solvent-responsive cavitand lanthanum complex
Name
C9DT03199E.pdf
Description
Accepted version
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726.23 KB
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Checksum (MD5)
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Author(s)
Guagnini, Francesca
Pedrini, Alessandro
Swager, Timothy M
Massera, Chiara
Dalcanale, Enrico
Date Issued
2019
Journal
Dalton Transactions
Publisher
Royal Society of Chemistry (RSC)
Version
Author's final manuscript
Abstract
© 2019 The Royal Society of Chemistry. Stimuli-responsive supramolecular assemblies are dynamic systems that can reversibly switch between different states upon external stimuli. In this context, metal coordination offers a reliable strategy for the preparation of stimuli responsive supramolecular architectures. Herein we report the preparation of a solvent-responsive cavitand-lanthanum coordination complex. A tetra-phosphonate cavitand has been functionalized with four hydroxyl moieties at the upper rim to form a pre-organized octadentate ligand capable of binding lanthanum salts. Exploiting the orthogonal recognition sites, two different complex architectures are formed in acetonitrile and acetone, respectively. The complexes have been characterized in solution by NMR spectroscopy, ITC experiments, while at the solid state, the single crystal structure of the acetonitrile derivative has been determined. Furthermore, as observed by DOSY-NMR spectroscopy, small quantities of acetone in acetonitrile are sufficient to trigger assembly interconversion.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1039/C9DT03199E
