- Title
- Synthesis and evaluation of PGM-selective ligands
- Creator
- Gxoyiya, Babalwa Siliziwe Blossom
- Subject
- Platinum group
- Subject
- Ligands
- Subject
- Ligands -- Evaluation
- Date
- 2013-05-28
- Type
- Thesis
- Type
- Masters
- Type
- MSc
- Identifier
- vital:4450
- Identifier
- http://hdl.handle.net/10962/d1007849
- Identifier
- Platinum group
- Identifier
- Ligands
- Identifier
- Ligands -- Evaluation
- Description
- A series of polydentate POM-selective, sulfur-containing amide ligands have been synthesized from ro-dibromoalkanes and mercaptoacetanilide, The resulting 3,6- dithiaoctanediamides and 3,7-dithianonanediamides, some of which contain a polymerisable group, were all characterized by high-resolution MS, IR, I Hand I3C NMR spectroscopic methods. Various approaches to the polymerisable ligands were explored, the most efficient proving to be the incorporation of an allyl ether moiety in the mercaptoacetanilide. The corresponding Pd(U) and Pt(II) complexes were also prepared from the metal chloride salts and characterized by elemental analysis and spectroscopic methods. The NMR data indicates that both the cis- and transcomplexes were formed, while the IR data indicates cis- coordination of the chlorine . ligands. Molecularly imprinted polymers (MIP's), prepared using platinum(II) mercaptoacetanilide and 3,6-dithiadiamide complexes, showed high selectivity for , , palladium(II) [in the presence of Pt(II), CoCII), Cu(II) and Ni(II)] as determined by . ICP-MS analysis. The more kinetically inert Pt(II) ions however, slowly displaced Pd(II), confirming the Pt(II) selectivity of the MIP's. Solvent extraction studies were conducted to explore the selectivity of the 3,6- dithiaoctanediamides and 3,7-dithianonanediamides for Pd(U) over CoCII), Cu(U) and Ni(II). The ICP-MS data indicate that, in general, equilibration was achieved within ten minutes and that the longer-chain amides were less selective than the shorter-chain analogues.
- Description
- KMBT_363
- Description
- Adobe Acrobat 9.54 Paper Capture Plug-in
- Format
- 119 p.
- Format
- Publisher
- Rhodes University
- Publisher
- Faculty of Science, Chemistry
- Language
- English
- Rights
- Gxoyiya, Babalwa Siliziwe Blossom
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