Spectrophotometric Study of Uranyl-Oxalate System : Are there polynuclear species formed in solution ?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F01%3A00008552" target="_blank" >RIV/00216224:14310/01:00008552 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Spectrophotometric Study of Uranyl-Oxalate System : Are there polynuclear species formed in solution ?

Original language description

Uranyl-oxalate complex equilibria in aqueous solution were studied by UV-Vis spectrophotometry. Due to high spectra correlation, derivative spectrophotometry was also applied during the search for the best chemical model. Absorption spectra of all the complexes were calculated and found in a good agreement with theoretical considertions. Overall protonation constants of oxalate, necessary for accurate calculation of uranyl-oxalate formation constants, were also determined under the same conditions and the following values were obtained log K1 = 3.83 +/- 0.01; log K2 = 4.92 +/- 0.01. Stability constants determined for the (UO2)p(C2O4)q 2p-2q species were: log Beta11 = 6.31 +/- 0.02, log Beta12 = 11.21 +/- 0.07, log Beta13 = 13.8 +/- 0.04, log Beta23 = 18.5 +/- 0.2, log Beta25 = 28.5 +/- 0.1 (I = 3.0 M NaClO4; 298.2 K). The equilibrium constants were extrapolated to infinite dilution by applying Specific ion Interaction Theory (SIT) and are the following: log Beta11 = 7.41 +/- 0.01, log

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2001

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Polyhedron

ISSN

0277-5387

e-ISSN

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Volume of the periodical

21

Issue of the periodical within the volume

14-15

Country of publishing house

IT - ITALY

Number of pages

10

Pages from-to

1411-1420

UT code for WoS article

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EID of the result in the Scopus database

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