The effect of phosphonic acid substituents on europium(III) complex stability in acidic solutions

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6179264

Nash, K L

The thermodynamics of protonation and europium(III) complex formation with substituted methane diphosphonic acids have been reported recently. These ligands form strong complexes with europium in moderately acidic solutions ((H{sup +}) {ge} 0.1 M), conditions not conducive to complexation by most carboxylate and aminopolycarboxylate ligands. A correlation of log {beta} vs pK{sub a} values for phosphonate and carboxylate ligands is used to explore the effect of ligand structure on complex stability. 5 refs., 1 fig.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6179264
• Report Number(s): CONF-9009296-2; ON: DE91006566
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AFFINITY
BARYONS
CARBOXYLIC ACID SALTS
CHELATES
COMPLEXES
CORRELATIONS
DISPERSIONS
ELEMENTARY PARTICLES
EUROPIUM COMPLEXES
FERMIONS
HADRONS
MIXTURES
NUCLEONS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PH VALUE
PHOSPHONATES
PHOSPHONIC ACIDS
PROTONS
RARE EARTH COMPLEXES
SOLUTIONS
STABILITY