Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance

Technical Report · Sun Jun 01 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/834754· OSTI ID:834754

Bowman-James, Kristin; Wilson, George S

The original funded project (1996) had as its major goal the design and synthesis of polyammonium macrocyclic receptors for oxoanions of environmental importance, particularly those found in high level waste tanks. Nitrate was a major ion of focus. The project evolved over the last six years to target important and timely problems of critical interest to the EMSP mission. Emphasis was shifted from polyammonium receptors to lipophilic amide-based receptors more amenable for both separations and sensing applications in the last renewal, and significant effort was directed toward selective recognition of sulfate because of its detrimental role in the vitrification process. The last three years have been focused on the basic chemical aspects of anion receptor design of functional pH independent systems, with the ultimate goal of targeting the selective binding of sulfate, as well as design of separations strategies for selective and efficient removal of targeted anions. Key findings during these years include: (1) among the first synthetic sulfate-selective anion-binding agents; (2) simple, structure-based methods for modifying the intrinsic anion selectivity of a given class of anion receptors; and (3) two new classes of macrocyclic ligands, mixed amide/quaternary amine, thioamide-based macrocycles and cryptands.

• Research Organization: Oak Ridge National Lab., Oak Ridge, TN (US)
• Sponsoring Organization: US Department of Energy; USDOE Office of Science (SC) (US)
• OSTI ID: 834754
• Report Number(s): EMSP-74019-2003
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
ANIONS
CHEMISTRY
DESIGN
FUNCTIONALS
NITRATES
REMOVAL
SULFATES
SYNTHESIS
TANKS
TARGETS
VITRIFICATION
WASTES