AI Article Synopsis
- Nitroxide free radicals can be effectively used to study cucurbit[n]uril (CB[n]) assemblies in aqueous environments using EPR spectroscopy.
- CB[7] and CB[8] exhibit significant aggregation both in solution and solid form, as shown by X-ray crystallography revealing supramolecular structures.
- The nitroxides embedded within these CB[n] structures are notably resistant to biological reduction due to the protective 'carcerand effect' provided by CB[7] and CB[8].
Article Abstract
Nitroxide free radicals are demonstrated to be useful guests for probing cucurbit[n]uril (CB[n]) assemblies in water by EPR spectroscopy. CB[7] and CB[8] significantly aggregate either in solution or in the solid state (as evidenced by a single-crystal X-ray structure in which CB[8] forms supramolecular triangles with 4-methoxy-TEMPO). The included nitroxides show a striking resistance to biologically relevant reduction, benefiting from the carcerand effect of CB[7] and CB[8] solutions.
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| http://dx.doi.org/10.1021/ja900306m | DOI Listing |
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