A spectrophotometric investigation of the complex between titanyl oxalate and 3-hydroxyflavone in water ethanolic mixtures

被引：5

作者：

Aleksic, M ^{[1
]}

Blagojevic, S ^{[1
]}

Malesev, D ^{[1
]}

Radovic, Z ^{[1
]}

机构：

[1] Univ Belgrade, Fac Pharm, YU-11000 Belgrade, Yugoslavia

来源：

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY | 2000年 / 65卷 / 09期

关键词：

complex; 3-hydroxyflavone (3HF); titanyl oxalate; spectrophotometric methods;

D O I：

10.2298/JSC0009631A

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

It has been established, by the application or suitable spectrophotometric methods and pH-metric measurements, that titanyl oxalate anion and 3-hydroxyflavone (3HF) form a [TiO(C2O4)(2)(C15H9O3)(2)](4-) complex. The investigation of the composition and thr concentration stability constant of the complex were carried out in a 50% aqueous ethanol solution at room temperature (20 degrees C), in the pH range from 1.9 to 9.0, The concentration stability constant of the complex, log beta(2) ranged from 16.65 at pH 5.0 to 13.96 at pH 7.0. The conditions for the spectrophotometric determination of 3HF by means of the complex formation were investigated in the concnetration range From 2.5 x 10(-5) to 3.0 x 10(-4) mol dm(-3) 3HF.

引用

页码：631 / 638

页数：8

共 6 条

[1] INVESTIGATION OF THE MOLYBDATE(II)-3-HYDROXYFLAVONE COMPLEX
MALESEV, D
RADOVIC, Z
JELIKICSTANKOV, M
MONATSHEFTE FUR CHEMIE, 1991, 122 (6-7): : 429 - 434
[2] INVESTIGATION OF THE URANIL(II) 3-HYDROXYFLAVONE COMPLEX
MALESEV, D
RADOVIC, Z
JELIKICSTANKOV, M
MONATSHEFTE FUR CHEMIE, 1990, 121 (6-7): : 455 - 460
[3] INVESTIGATION OF EUROPIUM(III)-RUTIN COMPLEX IN WATER-ETHANOLIC SOLUTION
MALESEV, D
RADOVIC, Z
JELIKICSTANKOV, M
SPECTROSCOPY LETTERS, 1993, 26 (10) : 1985 - 1995
[4] Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol Water Mixtures
Hakimi, Mohammad
Nezhadali, Azizollah
Naemi, Asghar
E-JOURNAL OF CHEMISTRY, 2008, 5 (03) : 551 - 556
[5] Complex Formation of Crown Ethers with Cations in Water–Organic Solvent Mixtures. III. Thermodynamics of Interaction Between Na+ Ion with 15-Crown-5 Ether in Water–Acetonitrile Mixtures at 25°C
Małgorzata Jóźwiak
Journal of Solution Chemistry, 2002, 31 : 589 - 599
[6] Thermodynamic study of complex formation between Cu(II) and 4-amino-6-methyl-1,2,4-triazin-3-thione-5-one in binary ethanol/water mixtures using conductometric method
Nezhadali, Azizollah
Hakimi, Mohammad
Naemi, Asghar
ASIAN JOURNAL OF CHEMISTRY, 2008, 20 (02) : 1451 - 1456

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