Reversible Assembly of a Supramolecular Cage Linked by Boron–Nitrogen Dative Bonds |
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Authors: | M.Sc. Ayan Dhara Dr. Florian Beuerle |
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Affiliation: | Universit?t Würzburg, Institut für Organische Chemie and, Center for Nanosystems Chemistry (CNC), Am Hubland, 97074 Würzburg (Germany) |
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Abstract: | Boron–nitrogen dative bonds provide a suitable motif for reversible, yet strong and directed interactions, leading to the highly efficient self‐assembly of small organic building blocks into supramolecular cage structures. A bipyramidal [2+3] assembly, as the first example of a supramolecular cage mediated by B?N dative bonds that exists as a discrete species in solution, is quantitatively obtained from a tribenzotriquinacene‐based trisboronate ester and 1,4‐diazabicyclo[2.2.2]octane. Thermodynamic equilibria of cage formation are investigated by isothermal titration calorimetry and fully reversible cage opening can be observed at elevated temperatures. |
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Keywords: | boron– nitrogen dative bonds cage compounds self‐assembly supramolecular chemistry tribenzotriquinacenes |
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