Synthesis of proton-ionizable lariat ethers
| dc.creator | Hu, Hui | |
| dc.date.accessioned | 2016-11-14T23:11:10Z | |
| dc.date.available | 2011-02-19T00:56:23Z | |
| dc.date.available | 2016-11-14T23:11:10Z | |
| dc.date.issued | 2001-08 | |
| dc.degree.department | Chemistry | en_US |
| dc.description.abstract | Proton-ionizable lariat ethers are used for solvent extraction by binding metal cations within their central cavities and by their side arms. In this research, three species of proton-ionizable lariat ethers have been prepared to study the effects of structural modifications upon the selectivity and efficiency of metal ion separations. The first series is a group of N-(trifluoromethyl) ulfonyl sym-(l-alkynyl)dibenzol6-crown-5-oxyacetamides and their carboxylic acid precursors with geminal 1-alkynyl groups of differing lengths for the solvent extraction of alkali metal cations and their transport across polymeric inclusion membranes. The second series is a family of lariat ether carboxylic acids and N-(X)sulfonyl carboxamides with X = methyl and trifluoromethyl and differing ring sizes for use in the separation of Co(II) and Zn(II) by metal ion flotation. The crown ether ring sizes vary from 13-crown-4 to 19-crown-6. The third series is a group of new lipophilic proton-ionizable lariat ethers with differing ring sizes for the solvent extraction of alkali metal cations. The lipophilic lariat ethers have crown ether rings of sizes varying from 12-crown-4 to 18-crown-6. The lariat ether NT(X)-sulfonyl carboxamides contain four different X groups to "tune" the acidity of the pendant acidic function. | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/2346/22369 | en_US |
| dc.language.iso | eng | |
| dc.publisher | Texas Tech University | en_US |
| dc.rights.availability | Unrestricted. | |
| dc.subject | Lariat ethers | en_US |
| dc.subject | Organic compounds | en_US |
| dc.title | Synthesis of proton-ionizable lariat ethers | |
| dc.type | Thesis |