| Summary: | 碩士 === 國立彰化師範大學 === 化學系 === 104 === For the preparation of organic receptors for specific anions, especially sulfate and phosphate anions, we previously synthesized successfully three ligands (L5, L6 and L8) containing pyrrolyl and amino functionalities. In this report, further studies on these receptors are presented. The selective precipitation of sulfate anion by cation [HL6]+ is more efficient and specific than protonated L5. Receptor L6, purified with NMR and Mass characterization this time, can selective precipitate sulfate anions in the presence of protic solvent. This finding implies the strong affinity between [HL6]+ and sulfate ion. To minimize the cost for industrial application, the synthesized receptor must be easily recovered and re-used for the next round. These synthesized receptors (L5, L6 and L8) can be successfully recovered with high yield after precipitation procedure through neutralization and extraction.
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