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Synthesis of Upper Rim Covalently Linked Double Calix[6]arenes by Arturo Arduini; Riccardo Ferdani; Andrea Pochini; Andrea Secchi is a Chemistry article available to read on EtoBox.

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AbstractÐA series of new double calix [6]arenes obtained through the 1,3,5-upper rim linkage of two calix[6]arene units with imino or 1,4phenylendiimino bridges has been synthesised. These compounds were conceived as hosts for selected organic cations but since they are molecular cages with different grades of accessibility of the internal cavity, they gave some insight on the way 1,3,5-trimethoxycalix[6]arenes interact with guests and, in particular on the pathway guests choose to access the cavity. 1 H NMR studies showed that the distance between the two calixarene caps and the dimension of the equatorial portals are the key control elements on the ef®ciency and selectivity of binding. It was thus hypothesised that the entrance of the guests into the cage takes place exclusively from the equatorial portals and, in general, from the upper rim of the calix[6]arene.

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Author

Arturo Arduini; Riccardo Ferdani; Andrea Pochini; Andrea Secchi

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4020)

Published

2000

Language

EN

Field

Chemistry (Physical Sciences)