Crown ether compounds, process for the preparation of the crown ether complex forming agents and ion-selective membrane electrodes containing the same
US4531007A · kind A · utility
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Key dates
| Filing date | Mar 7, 1983 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Mar 7, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3335
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
New crown ether derivatives of formula (I) ##STR1## wherein R stands for hydrogen or C.sub.1-4 alkyl PA1 n stands for 1,2, PA1 X stands for oxygen, sulphur or a NH-group PA1 Y represents hydrogen or nitro PA1 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.