Effect of ionic strength on the thermodynamic characteristics of complexation between Fe(III) ion and nicotinamide in water-ethanol and water-dimethyl sulfoxide mixtures

被引：6

作者：

Gamov, G. A. ^{[1
]}

Grazhdan, K. V. ^{[1
]}

Gavrilova, M. A. ^{[1
]}

Dushina, S. V. ^{[1
]}

Sharnin, V. A. ^{[1
]}

Baranski, A. ^{[2
]}

机构：

[1] Ivanovo State Univ Chem & Technol, Res Inst Thermodynam & Kinet Chem Proc, Ivanovo 153000, Russia

[2] Cracow Univ Technol, PL-31155 Krakow, Poland

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2013年 / 87卷 / 06期

关键词：

iron(III); nicotinamide; perchlorate; IR spectroscopy; potentiometry; calorimetry; ionic strength; ethanol; dimethyl sulfoxide; stability constant; enthalpy; DEPENDENCE; HYDROLYSIS; IRON(III); YTTRIUM;

D O I：

10.1134/S0036024413060101

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solutions of iron(III) perchlorate in water, water-ethanol, and water-dimethyl sulfoxide solvents ( = 0.7 and 0.25 mole fractions) at ionic strength values I = 0.1, 0.25, and 0.5 are studied by IR spectroscopy. Analysis of the absorption bands of perchlorate ion shows that it does not participate in association processes. It is demonstrated that in the range of ionic strength values between 0 and 0.5 (NaClO4), it affects neither the results from potentiometric titration to determine the stability constants of the iron(III)-nicotinamide complex nor the thermal effects of complexation determined via direct calorimetry in a binary solvent containing 0.3 mole fractions (m.f.) of a non-aqueous component.

引用

页码：967 / 972

页数：6

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