1H and 13C nuclear magnetic resonance relaxation-time studies of ionophoric calixarene esters

Akio Yamada, Tatsuya Murase, Kiyoshi Kikukawa, Takashi Arimura, Seiji Shinkai

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Abstract

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+.

Original languageEnglish
Pages (from-to)793-797
Number of pages5
JournalJournal of the Chemical Society, Perkin Transactions 2
Issue number5
Publication statusPublished - Dec 1 1991

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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