A number of calix [6]arenes bearing ureas at the upper rim positions of alternate rings 1, 3 and 5 were prepared and studied in detail by NMR spectroscopy and gel permeation chromatography. N-Unsubstituted ureas were shown to dimerize through a cyclic array of hydrogen bonds to give cylindrical cavi
Stable Hydrogen-Bonded Spherical Capsules Formed from Self-Assembly of Pyrogallol[4]arenes
✍ Scribed by Qian-Feng Zhang; Richard D. Adams; Dieter Fenske
- Publisher
- Springer Netherlands
- Year
- 2005
- Tongue
- English
- Weight
- 404 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0923-0750
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📜 SIMILAR VOLUMES
The acid-catalyzed condensation of pyrogallol and aldehydes yields pyrogallol[4]arenes, which associate in the form of hexameric capsules of extraordinary stability due to the presence of 48 intermolecular hydrogen bonds seaming the individual pyrogallol[4]arenes together.
## Abstract The nanostructure of the fibrillar supramolecular aggregates generated in decane solutions of homoditopic heterocomplementary monomers forming sextuple hydrogen‐bond‐mediated self‐assemblies was investigated by small‐angle neutron scattering and cryogenic‐temperature transmission electr