| Форма представления | Статьи в зарубежных журналах и сборниках |
| Год публикации | 2021 |
| Язык | русский |
|
Иванова Валентина Юрьевна, автор
Чевела Владимир Всеволодович, автор
|
| Библиографическое описание на языке оригинала |
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. - Опубликовано онлайн: 12 октября 2021 г |
| Аннотация |
Comments on Inorganic Chemistry |
| Ключевые слова |
citric acid, complex formation, complexes stability, gadolinium(III), polynuclear complexation |
| Название журнала |
Comments on Inorganic Chemistry
|
| URL |
https://www.tandfonline.com/doi/full/10.1080/02603594.2021.1976759 |
| Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на эту карточку |
https://repository.kpfu.ru/?p_id=257870 |
Полная запись метаданных  |
| Поле DC |
Значение |
Язык |
| dc.contributor.author |
Иванова Валентина Юрьевна |
ru_RU |
| dc.contributor.author |
Чевела Владимир Всеволодович |
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. - Опубликовано онлайн: 12 октября 2021 г |
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/?p_id=257870 |
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 |
Статьи в зарубежных журналах и сборниках |
ru_RU |
|
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