East Carolina University Issued U.S. Patents
Chemical Formulations

U.S. Patent No. 6,441,164
Wurster's crown ligands
Inventor(s): John W. Sibert
Issued: August 27, 2002
Abstract: Wurster's crown ligands comprise a macrocyclic ligand such as a crown ether in which a hetero atom is substituted with a 1,4-phenylenediamine group. The phenylenediamine group is covalently bound to the macrocyclic ligand by one or both of the amine nitrogens, the amine nitrogen thereby substituting for the hetero atom of the macrocyclic ligand. The resulting compounds are redox active. Methods of making and using the compounds are also disclosed.

U.S. Patent No. 6,262,258
Wurster's crown ligands
Inventor(s): John W. Sibert
Issued: July 17, 2001
Abstract: Wurster's crown ligands comprise a macrocyclic ligand such as a crown ether in which a hetero atom is substituted with a 1,4-phenylenediamine group. The phenylenediamine group is covalently bound to the macrocyclic ligand by one or both of the amine nitrogens, the amine nitrogen thereby substituting for the hetero atom of the macrocyclic ligand. The resulting compounds are redox active. Methods of making and using the compounds are also disclosed.

U.S. Patent No. 7,078,528

Biimidazole diamide anion binding agents

Inventor(s): William Allen, Corey Causey

Issued: July 18, 2006

Abstract: Biimidazole diamide compounds that are useful for binding anions such as sulfate are described, along with the use thereof for purposes such as extracting anions from a waste stream and/or detecting anions.