Calixarene tubes as cation receptors
US6326394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jun 30, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A cyclic compound of formula (I) ##STR1## wherein R.sup.x groups which may be the same or different are selected from --O--(CH.sub.2).sub.n --O-- where n is an integer of from 2-6; R.sup.y and R.sup.z groups which may be the same or different are independently selected from hydrogen, halogen or a hydrocarbyl group; R.sup.a together with R.sup.b of the adjacent phenyl ring and R.sup.c together with R.sup.d of the adjacent phenyl ring form a group of formula --(CH.sub.2).sub.m -- or --(CH.sub.2).sub.p --O-- where m and p are integers of from 1-5, and each group R.sup.a -R.sup.b and R.sup.c -R.sup.d may be the same or different; and x is an integer of 2 or more, such as 4. Compounds of formula (I) display particular selectivity for specific ions such as potassium ions. They are useful inter alia in reactions where scavenging of a specific cation is required or as ion specific electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.