Abstract
Four calix[4]arene benzo-crown-6 ethers functionalized with primary amine groups in various positions have been synthesized. The cesium extraction behavior under alkaline and acidic conditions has been measured for these compounds and compared with that of non-amine containing analogs. Extraction strength when the amine group is neutral is not affected by the amino substituent, but protonation causes a marked decrease in extraction strength, permitting pH-switched back-extraction.
| Original language | English |
|---|---|
| Pages (from-to) | 5397-5401 |
| Number of pages | 5 |
| Journal | Tetrahedron Letters |
| Volume | 44 |
| Issue number | 29 |
| DOIs | |
| State | Published - Jul 14 2003 |
Funding
This research was sponsored by the Environmental Management Science Program of the Offices of Science and Environmental Management, US Department of Energy, under contract number DE-AC05-0096OR22725 with Oak Ridge National Laboratory, managed by UT-Battelle, LLC. The participation of M.G.G. was made possible by an appointment to the Oak Ridge National Laboratory Postgraduate Program administered by the Oak Ridge Associated Universities.
| Funders | Funder number |
|---|---|
| US Department of Energy | DE-AC05-0096OR22725 |
| UT-Battelle | |
| Oak Ridge National Laboratory |