THERMODYNAMIC AND KINETIC STUDIES OF LANTHANIDE(III) COMPLEXES WITH H5do3ap (1,4,7,10-TETRAAZACYCLODODECANE-1,4,7-TRIACETIC-10-(METHYLPHOSPHONIC ACID)), A MONOPHOSPHONATE ANALOGUE OF H4dota
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F05%3A00012955" target="_blank" >RIV/00216224:14310/05:00012955 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/05:00007748 RIV/00216208:11310/05:7748
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
THERMODYNAMIC AND KINETIC STUDIES OF LANTHANIDE(III) COMPLEXES WITH H5do3ap (1,4,7,10-TETRAAZACYCLODODECANE-1,4,7-TRIACETIC-10-(METHYLPHOSPHONIC ACID)), A MONOPHOSPHONATE ANALOGUE OF H4dota
Original language description
Solution properties of complexes of a new H4dota-like ligand containing three acetate and one methylphosphonate pendant arms (H5do3ap, H5L) were studied. The ligand exhibits a high last dissociation constant (pKA = 13.83) as a consequence of the presenceof phosphonate moiety. In solution, successive attachment of protons leads to several reorganizations of protonation sites and the neutral zwitterionic species H5do3ap has the same solution structure as in the solid state where the nitrogen atom bindingmethylphosphonate and the opposite nitrogen atoms are protonated. Stability constants with Na+ and trivalent lanthanide ions (La3+, Ce3+, Eu3+, Gd3+, Lu3+) and Y3+ were determined. The constants are comparable or higher than those of H4dota due to the higher overall basicity of H5do3ap. Formation of the stable protonated complexes as well as complexes with the L:M = 1:2 stoichiometry was proved. Formation and decomplexation kinetics of the Ce3+ and Gd3+ complexes were investigated. The
Czech name
Termodynamická a kinetická studie komplexů lanthanoidů(III) s H5do3ap (1,4,7,10-tetraazacyklododekan-1,4,7-triaceto-10-(methylfosfonová kyselina)), monofosfonátovým analogem H4dota
Czech description
V předložené práci byly studovány vlastnosti komplexů kovů s ligandem, který je analogem H4dota obsahujícím tři acetátové a jedno methylfosfonové pendantní rameno. Bylo prokázáno, že poslední disociační konstanta je velmi vysoká (pKa=13,83)jako důsledekpřítomnosti fosfonátového řetězce.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CB - Analytical chemistry, separation
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Collection of Czechoslovak Chemical Communications
ISSN
0010-0765
e-ISSN
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Volume of the periodical
70
Issue of the periodical within the volume
11
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
34
Pages from-to
1909-1942
UT code for WoS article
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EID of the result in the Scopus database
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