pH-dependent metal ion selectivity by a crown ether carboxylic acid

Journal Article · Wed Jan 29 04:00:00 EST 1986 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00223a037· OSTI ID:5890149

Chang, C A; Twu, J; Bartsch, R A

Formation constants are reported for complexes of sym-dibenzo-16-crown-5-oxyacetic acid in both its neutral and deprotonated forms with Na/sup +/, K/sup +/, and Ca/sup 2 +/. The formation constant is greater for complexes of Na/sup +/ than for K/sup +/ when the ligand is deprotonated. The study, therefore, demonstrates that attaching an ionizable pendent group to a crown ether permits ligand selectivity toward metal ion binding to be tuned by adjusting the pH of the medium. 13 references, 2 figures, 1 table.

• Research Organization: Univ. of Texas, El Paso
• OSTI ID: 5890149
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 25:3; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
ALKALI METAL COMPLEXES
ALKALINE EARTH METAL COMPLEXES
CALCIUM COMPLEXES
CARBOXYLIC ACIDS
CATIONS
CHARGE DENSITY
CHARGED PARTICLES
COMPLEXES
DATA
EXPERIMENTAL DATA
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
IONS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PH VALUE
PHYSICAL PROPERTIES
POLYETHYLENE GLYCOLS
POLYMERS
POTASSIUM COMPLEXES
POTENTIOMETRY
SODIUM COMPLEXES
THERMODYNAMIC PROPERTIES
TITRATION