STABILITY-CONSTANTS OF THE 0-TETRAAZACYCLODODECANE-N,N',N'',N'''-TETRAACETATE COMPLEXES

Authors
TOTH E BRUCHER E
Citation
E. Toth et E. Brucher, STABILITY-CONSTANTS OF THE 0-TETRAAZACYCLODODECANE-N,N',N'',N'''-TETRAACETATE COMPLEXES, Inorganica Chimica Acta, 221(1-2), 1994, pp. 165-167
Citations number
12
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Inorganica Chimica Acta → ACNP
ISSN journal
00201693
Volume
221
Issue
1-2
Year of publication
1994
Pages
165 - 167
Database
ISI
SICI code
0020-1693(1994)221:1-2<165:SOT0>2.0.ZU;2-4
Abstract
The stability constants of the LnDOTA- complexes have been determined by spectrophotometry at 37-degrees-C in 1.0 M NaCl. The log K values o f CeDOTA- and EuDOTA- were obtained by a direct method using the UV ab sorption of Ce3+ and Eu3+. For the other lanthanides log K values were obtained from the study of the competition reaction between the Ln3ion and the Ce3+ or Eu3+ ion for DOTA. The stability constants increas e with the decrease in the ionic size between La3+ and Eu3+, while for the heavier lanthanides the log K values are practically constant.