Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1080/00958972.2016.1270450

Ключевые слова: Succinic acid, capillary electrophoresis, stability constant, Cu(II) complexes, charge of complex

Аннотация: The advantage of capillary electrophoresis was demonstrated for studying a complicated system owing to the dependence of direction and velocity of the electrophoretic movement on the charge of complex species. The stability constants of copper(II) complexes with ions of succinic acid were determined by capillary electrophoresis, including the 1 : 2 metal to ligand complexes which are rarely mentioned. The measurements were carried out at 25 C-omicron and ionic strength of 0.1, obtained by mixing the solutions of succinic acid and lithium hydroxide up to pH 4.2-6.2. It was shown that while pH was more than 4.5 the zone of copper(II) complexes with succinate moves as an anion. It is impossible to treat this fact using only the complexes with a metal-ligand ratio of 1 : 1 (CuL0, CuHL+). The following values of stability constants were obtained: log beta(CuL) = 2.89 +/- 0.02, log beta(CuHL+) = 5.4 +/- 0.5, log beta(CuL22-) = 3.88 +/- 0.05, log beta(CuHL2-) = 7.2 +/- 0.3.

Журнал: JOURNAL OF COORDINATION CHEMISTRY

Выпуск журнала: Vol. 70, Is. 3

Номера страниц: 431-440

ISSN журнала: 00958972

Место издания: ABINGDON

Издатель: TAYLOR & FRANCIS LTD

• Sursyakova Viktoria V. (Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Lab Mol Spectroscopy & Anal, Krasnoyarsk, Russia)
• Burmakina Galina V. (Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Lab Mol Spectroscopy & Anal, Krasnoyarsk, Russia; Siberian Fed Univ, Sch Nonferrous Met & Mat Sci, Krasnoyarsk, Russia)
• Rubaylo Anatoly I. (Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Lab Mol Spectroscopy & Anal, Krasnoyarsk, Russia; Siberian Fed Univ, Sch Nonferrous Met & Mat Sci, Krasnoyarsk, Russia; Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk, Russia)

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