A new halogen bonding 1,2-iodo-triazolium-triazole benzene motif for anion recognition
Date
2021
Authors
Bunchuay, Thanthapatra
Docker, Andrew
White, Nicholas
Beer, Paul D.
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Publisher
Pergamon-Elsevier Ltd
Abstract
The synthesis of a series of halogen bonding (XB) acyclic anion receptors based on a novel 1,2-iodo-triazolium-triazole benzene motif is reported. A combination of one- and two-dimensional 1H and 19F NMR spectroscopic techniques elucidate key conformational effects associated with the incorporation of ortho-substituted iodo-triazole based XB donors. 1H NMR anion titration experiments highlight the anion recognition potency of a mono-cationic XB iodo-triazolium-triazole benzene receptor, remarkably forming stronger halide complexes in comparison to a dicationic hydrogen bonding (HB) bis-proto-triazolium receptor analogue. X-ray crystal structure analysis provide insights into halide binding induced conformational changes and coordination modes, revealing the unique electronic and steric consequences associated with multidentate XB donor arrays.
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Keywords
Halogen Bonding, Anion Recognition, Sigma-Hole Interactions, Supramolecular, Host-Guest Chemistry
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Source
Polyhedron
Type
Journal article
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Restricted until
2099-12-31
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