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Design and self-assembly of wide and robust coordination cages.

ABSTRACT: The self-assembly of a new class of coordination cages formed from two tetrapyridyl-substituted cavitands connected through four square-planar palladium or platinum complexes is reported. The shape of the internal cavity resembles an ellipsoid with a calculated volume of 840 A(3). The four lateral portals have a diameter of about 6 A, large enough to allow the fast entrance/egress of counterions in solution. The platinum cages 3a,e cannot be disassembled using triethylamine as competitive ligand and they are kinetically stable at room temperature, whereas the palladium cages 3b-d, 3f-h are disassembled and kinetically labile under the same conditions. The different solubility properties of the cage components have allowed the extension of this self-assembly protocol to the liquid-liquid interface.

SUBMITTER: Pirondini L

PROVIDER: S-EPMC122693 | biostudies-literature | 2002 Apr

REPOSITORIES: biostudies-literature

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Design and self-assembly of wide and robust coordination cages.

Pirondini Laura L Bertolini Francesca F Cantadori Barbara B Ugozzoli Franco F Massera Chiara C Dalcanale Enrico E

Proceedings of the National Academy of Sciences of the United States of America 20020409 8

The self-assembly of a new class of coordination cages formed from two tetrapyridyl-substituted cavitands connected through four square-planar palladium or platinum complexes is reported. The shape of the internal cavity resembles an ellipsoid with a calculated volume of 840 A(3). The four lateral portals have a diameter of about 6 A, large enough to allow the fast entrance/egress of counterions in solution. The platinum cages 3a,e cannot be disassembled using triethylamine as competitive ligand ...[more]

PMID: 11943856

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