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Metal-controlled aggregation-deaggregation in calix[4]arene-based self-assemblies

✍ Scribed by Pavel Lhotak; Seiji Shinkai


Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
190 KB
Volume
36
Category
Article
ISSN
0040-4039

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## Abstract In solvents such as chloroform or benzene, tetraurea calix[4]arenes **1** form dimeric capsules in which one solvent molecule is usually included as guest. To explore the structural requirements for the formation of such hydrogen‐bonded dimers we replaced one __p__‐tolylurea residue by

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A self-assembled fullerene receptor based on calix[5]arene has been developed. Silver cation complexation held together the two calix[5]arenes with bipyridine units providing a large enough cavity to take up C 60 or C 70 . The formation of the supramolecular complex with C 60 or C 70 was established

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Calix[4]arene derivatives with one adenine or thymine sidearm have been synthesized and their self-association characteristics which depend on solvent, temperature and concentrations are described. Mainly Watson-Crick A-T base pairing in these systems was detected using 1 H NMR and ESI-MS.