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Polycaps: Reversibly formed polymeric capsules

1997; National Academy of Sciences; Volume: 94; Issue: 14 Linguagem: Inglês

10.1073/pnas.94.14.7132

1091-6490

Ronald K. Castellano, Dmitry M. Rudkevich, Julius Rebek,

Molecular Sensors and Ion Detection

Described are assemblies consisting of polymeric capsules, "polycaps," formed from two calix[4]arene tetraureas covalently connected at their lower rims. In these structures self-assembly leads to reversibly formed capsule sites along a chain, reminiscent of beads on a string. Their dynamic behavior is characterized by 1H NMR spectroscopy through encapsulation of guest species, reversible polymerization, and the formation of sharply defined hybrid capsules.