Detail of "32545-72-5"

Reference

Stability constants of europium complexes with a nitrogen heterocycle substituted methane-1,1-diphosphonic acid

Stability constants of europium complexes with a nitrogen heterocycle substituted methane-1,1-diphosphonic acid. Jensen, M. P.; Rickert, P. G.; Schmidt, M. A.; Nash, K. L. (Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, USA). Journal of Alloys and Compounds, 249(1-2), 86-90 (English) 1997 Elsevier. CODEN: JALCEU. ISSN: 0925-8388. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Even in moderately acidic solns. ([H+] > 0.01 M), N-piperidinomethane-1,1-diphosphonic acid (H4PMDPA) is a strong complexant of trivalent lanthanide ions that shows enhanced complex soly. over previously studied 1,1-diphosphonic acids. The protonation consts. of PMDPA in 2.0 M H/NaClO4 were detd. by potentiometric and NMR titrns., and the stability consts. for the formation of complexes with Eu3+ were detd. by solvent extn. The difference in protonation equil. induced by the addn. of the nitrogen heterocycle results in an increase in the complexation strength of PMDPA. 32545-72-5 is the cas registry number of certain chemical which is used as reagents here. In solns. contg. 0.1 M H+ and ligand concns. greater than 0.02 M, PMDPA is the most effective 1,1-diphosphonic acid for europium complexation studied thus far. .