KFU. Card publication. New Aspects of Complex Formation in the Gadolinium(III)

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FEDERAL UNIVERSITY

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NEW ASPECTS OF COMPLEX FORMATION IN THE GADOLINIUM(III)&NDASH;CITRIC ACID SYSTEM IN AQUEOUS SOLUTION

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Ivanova Valentina Yurevna, author

Chevela Vladimir Vsevolodovich, author

Bibliographic description in the original language

Ivanova, V.Y. New Aspects of Complex Formation in the Gadolinium(III)–Citric Acid System in Aqueous Solution // V.Y. Ivanova, I.D. Shurygin, V.V. Chevela, O.P. Ajsuvakova, V.E. Semenov, S.G. Bezryadin / Comments on Inorganic Chemistry. - 2021. - Opublikovano onlayn: 12 oktyabrya 2021 g

Annotation

Comments on Inorganic Chemistry

Keywords

citric acid, complex formation, complexes stability, gadolinium(III), polynuclear complexation

The name of the journal

Comments on Inorganic Chemistry

URL

https://www.tandfonline.com/doi/full/10.1080/02603594.2021.1976759

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=257870&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ivanova Valentina Yurevna	ru_RU
dc.contributor.author	Chevela Vladimir Vsevolodovich	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Ivanova, V.Y. New Aspects of Complex Formation in the Gadolinium(III)–Citric Acid System in Aqueous Solution // V.Y. Ivanova, I.D. Shurygin, V.V. Chevela, O.P. Ajsuvakova, V.E. Semenov, S.G. Bezryadin / Comments on Inorganic Chemistry. - 2021. - �� : 12 �� 2021 �	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=257870&p_lang=2	ru_RU
dc.description.abstract	Comments on Inorganic Chemistry	ru_RU
dc.description.abstract	The complexation of gadolinium(III) with citric acid in aqueous solutions was studied by pH-metric titration, proton magnetic relaxation, and mathematic simulation in the pH range 2.0–10 at [Gd3+]: [H4Cit] = 1:1, 1:2, 1:3 ([Gd3+] = 1.3, 2.6, 5.0, 10.0, and 20.0 mmol L−1). In the process of simulation, the equilibrium composition, a model obtained from previously known works and including mono- and bis-citrate complexes of gadolinium(III) was taken as a basis. In this work, it is shown that a satisfactory description of the experimental data set of two independent physico-chemical methods is achieved only with the additional inclusion of citrate complexes of gadolinium(III) with higher degree of protonation and some new polynuclear complexes. The complex [GdH4Cit]3+ with the molecular form of the citrate ligand, and the polynuclear complexes [Gd2(HCit)2]?, [Gd2Cit2]2-, [Gd6(OH)2Cit6]8-, [Gd6(OH)3Cit6]9- were first detected at the molar ratio of 1:1. At two- and three-fold excess of citric acid, mononuclear bis- and tris-citrate complexes with different degrees of protonation were found, and binuclear tetrakis- and hexakis-citrate complexes [Gd2(HCit)Cit3]9-and [Gd2(HCit)4Cit2]14- at the pH > 7.5. On the example of this manuscript, the importance of applying the NMR relaxation method for identifying polynuclear complexation in systems containing paramagnetic ions is shown.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	citric acid	ru_RU
dc.subject	complex formation	ru_RU
dc.subject	complexes stability	ru_RU
dc.subject	gadolinium(III)	ru_RU
dc.subject	polynuclear complexation	ru_RU
dc.title	New Aspects of Complex Formation in the Gadolinium(III)–Citric Acid System in Aqueous Solution	ru_RU
dc.type	Articles in international journals and collections	ru_RU