New crown ether derivatives, process for the preparation thereof and ion-selective membrane electroes comprising the same
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United States of America Patent
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Apr 19, 1988
Issued Date -
N/A
app pub date -
Nov 1, 1984
filing date -
Jul 9, 1981
priority date (Note) -
Expired
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Abstract
The invention relates to new crown ether derivatives of the general Formula I ##STR1## and a process for the preparation thereof wherein Z.sup.1 is a group of the general Formula ##STR2## R.sub.a and R.sub.b may be the same or different and R.sub.a represents an alkyl group having 1-4 carbon atoms and R.sub.b is an alkyl group having 1-20 carbon atoms. The new crown ethers are useful in the preparation of ion-selective electrodes having a long lifetime.
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