Crown ether compounds, process for the preparation of the crown ether complex forming agents and ion-selective membrane electrodes containing the same
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United States of America Patent
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Jul 23, 1985
Grant Date -
N/A
app pub date -
Mar 7, 1983
filing date -
Jul 9, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
New crown ether derivatives of formula (I) ##STR1## wherein R stands for hydrogen or C.sub.1-4 alkyl n stands for 1,2, X stands for oxygen, sulphur or a NH-group Y represents hydrogen or nitro Z represents a chemical bond, --CH.sub.2 --, --(CH.sub.2).sub.2-4 --, --CH.sub.2 OCH.sub.2 --, --CH.sub.2 SCH.sub.2 --, ##STR2## or a group of the formula ##STR3## suitable for forming cation complexes, process for the preparation thereof and alkali or alkali earth metal ion-selective membrane electrodes containing said compounds are described.
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