1H and 13C NMR relaxation times (T1) of ethoxycarbonylmethyl derivatives of p-t-butylcalix[n]arenes have been determined at 90 MHz and 36 °C in [2H8]THF. It was found that these calixarenes feature a 'seesaw motion' around the ArCH2Ar linkage as a central support and that this molecular motion is largely suppressed through complexation with Na+.
|Number of pages||5|
|Journal||Journal of the Chemical Society, Perkin Transactions 2|
|Publication status||Published - Dec 1 1991|
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