The Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance
Work at carried out at ORNL since the inception of the project has served to demonstrate that the calix[4]pyrroles from the co-P.I.'s laboratory at the Univ. of Texas strongly enhance the extraction of sulfate by tricaprylmethylammonium nitrate or chloride in the presence of excess nitrate and chloride. Similar results were found in the case of the tetraamide macrocycles synthesized in the Bowman-James laboratory (Univ. of Kansas). Effort at the Univ. of Texas thus focused on generating new pyrrole-amide macrocycles that might combine the most favorable aspects of the calixpyrroles and the tetraamides. This culminated in the synthesis of several new receptors, which provided a ''matched set'' from whence insights into anion recognition could be inferred. As can be inferred from the data summarized in Table 1, small adjustments in the structure allow for a fine-tuning of the anion binding properties in favor of sulfate recognition, or in the case of injudicious modifications, selectivities that favor completely different classes of anionic substrates.
- Research Organization:
- University of Texas, Austin, TX
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-04ER63741
- OSTI ID:
- 884859
- Report Number(s):
- EMSP-90301-2005; R&D Project: EMSP 90301; TRN: US200616%%387
- Country of Publication:
- United States
- Language:
- English
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