Extraction and theoretical study on the complexation of the strontium cation with beauvericin
From extraction experiments and γ -activity measurements, the extraction constant corresponding to the equilibrium Sr 2+ (aq) + 2A − (aq) + 1 (nb) ⇔ 1 ·Sr 2+ (nb) + 2A − (nb) taking place in the two-phase water–nitrobenzene system (A − = picrate, 1 = beauvericin; aq = aqueous phase, nb = nitrobenz...
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Published in | Journal of radioanalytical and nuclear chemistry Vol. 295; no. 2; pp. 1119 - 1122 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.02.2013
Springer |
Subjects | |
Online Access | Get full text |
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Summary: | From extraction experiments and
γ
-activity measurements, the extraction constant corresponding to the equilibrium Sr
2+
(aq) + 2A
−
(aq) +
1
(nb) ⇔
1
·Sr
2+
(nb) + 2A
−
(nb) taking place in the two-phase water–nitrobenzene system (A
−
= picrate,
1
= beauvericin; aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log
K
ex
(
1
·Sr
2+
,2A
−
) = −0.6 ± 0.1. Further, the stability constant of the
1
·Sr
2+
complex in nitrobenzene saturated with water was calculated for a temperature of 25 °C: log
β
nb
(
1
·Sr
2+
) = 8.5 ± 0.1. Finally, by using quantum-mechanical DFT calculations, the most probable structure of the resulting cationic complex
1
·Sr
2+
was derived. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0236-5731 1588-2780 |
DOI: | 10.1007/s10967-012-1886-8 |