Spectrophotometric study of uranyl-oxalate complexation in
solution

J 2002

Spectrophotometric study of uranyl-oxalate complexation in solution

HAVEL, Josef; Julio Arturo SOTO-GUERRERO a Přemysl LUBAL

Základní údaje

Originální název

Spectrophotometric study of uranyl-oxalate complexation in solution

Autoři

HAVEL, Josef; Julio Arturo SOTO-GUERRERO a Přemysl LUBAL

Vydání

POLYHEDRON, OXFORD, PERGAMON-ELSEVIER SCIENCE LTD, 2002, 0277-5387

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10406 Analytical chemistry

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.414

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/02:00008618

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000176723200016

Klíčová slova anglicky

Spectrophotometric study; uranyl-oxalate; complexation in solution

Štítky

complexation in solution, Spectrophotometric study, uranyl-oxalate

Změněno: 11. 3. 2003 08:48, prof. RNDr. Josef Havel, DrSc.

Anotace

V originále

Uranyl-oxalate complex equilibrium in aqueous solution was studied by UV-Vis spectrophotometry. Due to high spectra correlation, derivative spectrophotometry was also applied during the search for the best chemical model. The absorption spectra of all the complexes were calculated and found in a good agreement with theoretical considerations. 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 K-1 = 3.83 +/- 0.01; log K-2 = 4.92 +/- 0.01. Stability constants determined for the [(UO2),(C2O4)(q)](2p-2q) species were: log beta(11) = 6.31 +/- 0.02, 109 +/- 12 = 11.21 +/- 0.07, log beta(13) = 13.8 +/- 0.04, log beta(23) = 18.5 +/- 0.2, log beta(25) = 28.5 +/- 0.1 (I = 3.0 M NaClO4; 25 degreesC). The equilibrium constants were extrapolated to infinite dilution by applying specific ion interaction theory (SIT) and are the following: log beta(11)(0) = 7.41 +/- 0.01, log beta(12)(0) = 11.80 +/- 0.02, log beta(13)(0) = 13.96 +/- 0.07. Formation of polynuclear [(UO2)(2)(C2O4)(3)](2-) and [(Uo(2))(2)(C2O4)(5)](6-) Species was proved and confirmed independently by conductometry and vapor pressure osmometry. (C) 2002 Published by Elsevier Science Ltd.

Návaznosti

MSM 143100011, záměr

Název: Struktura a vazebné poměry, vlastnosti a analýza syntetických a přírodních molekulových ansamblů

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Struktura a vazebné poměry, vlastnosti a analýza syntetických a přírodních molekulových ansamblů

Citovat

HAVEL, Josef; Julio Arturo SOTO-GUERRERO a Přemysl LUBAL. Spectrophotometric study of uranyl-oxalate complexation in solution. POLYHEDRON. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD, 2002, roč. 21, 14-15, s. 1411-1420. ISSN 0277-5387.

@article{485231,
   author = {Havel, Josef and SotoandGuerrero, Julio Arturo and Lubal, Přemysl},
   article_location = {OXFORD},
   article_number = {14-15},
   keywords = {Spectrophotometric study; uranyl-oxalate; complexation in solution},
   language = {eng},
   issn = {0277-5387},
   journal = {POLYHEDRON},
   title = {Spectrophotometric study of uranyl-oxalate complexation in solution},
   volume = {21},
   year = {2002}
}

TY  - JOUR
ID  - 485231
AU  - Havel, Josef - Soto-Guerrero, Julio Arturo - Lubal, Přemysl
PY  - 2002
TI  - Spectrophotometric study of uranyl-oxalate complexation in solution
JF  - POLYHEDRON
VL  - 21
IS  - 14-15
SP  - 1411-1420
EP  - 1411-1420
PB  - PERGAMON-ELSEVIER SCIENCE LTD
SN  - 02775387
KW  - Spectrophotometric study
KW  - uranyl-oxalate
KW  - complexation in solution
N2  - Uranyl-oxalate complex equilibrium in aqueous solution was studied by UV-Vis spectrophotometry. Due to high spectra correlation, derivative spectrophotometry was also applied during the search for the best chemical model. The absorption spectra of all the complexes were calculated and found in a good agreement with theoretical considerations. 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 K-1 = 3.83 +/- 0.01; log K-2 = 4.92 +/- 0.01. Stability constants determined for the [(UO2),(C2O4)(q)](2p-2q) species were: log beta(11) = 6.31 +/- 0.02, 109 +/- 12 = 11.21 +/- 0.07, log beta(13) = 13.8 +/- 0.04, log beta(23) = 18.5 +/- 0.2, log beta(25) = 28.5 +/- 0.1 (I = 3.0 M NaClO4; 25 degreesC). The equilibrium constants were extrapolated to infinite dilution by applying specific ion interaction theory (SIT) and are the following: log beta(11)(0) = 7.41 +/- 0.01, log beta(12)(0) = 11.80 +/- 0.02, log beta(13)(0) = 13.96 +/- 0.07. Formation of polynuclear [(UO2)(2)(C2O4)(3)](2-) and [(Uo(2))(2)(C2O4)(5)](6-) Species was proved and confirmed independently by conductometry and vapor pressure osmometry. (C) 2002 Published by Elsevier Science Ltd.
ER  -

HAVEL, Josef; Julio Arturo SOTO-GUERRERO a Přemysl LUBAL. Spectrophotometric study of uranyl-oxalate complexation in solution. \textit{POLYHEDRON}. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD, 2002, roč.~21, 14-15, s.~1411-1420. ISSN~0277-5387.

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