Potentiometric Determination of the Stability Constants of Lanthanide Complexes with Iminodiacetic Acid in Water and Dioxane-Water Mixtures

Sevgi ARZIK; Ebru MAVİOĞLU AYAN and A. Sedat ÇELEBİ

Article Details

Potentiometric Determination of the Stability Constants of Lanthanide Complexes with Iminodiacetic Acid in Water and Dioxane-Water Mixtures

Authors:

Sevgi ARZIK | Ebru MAVİOĞLU AYAN and A. Sedat ÇELEBİ

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2008 Vol.32 Issue 6, pp.721-729

Document Type:

Article

Publication Date:

5/2008

Document Language:

Turkish

Document ID (Org No.):

2000728406

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

The protonation constants of iminodiacetic acid (H2 ida)  and the stability constants of its complexes with Nd(III), Sm(III),  Gd(III), Dy(III), and Er(III) ions at metal/ligand mole ratios of 1:1,  1:2, and 1:3 at 25 °C and 0.1 M ionic strength in aqueous medium and  20%, 45%, and 70% w/w dioxane-water mixtures were determined by the  potentiometric method using the BEST computer program.  The stability  constants of the complexes that formed increased as the dioxane  content increased.  The stability of all the analogues' complexes,  both in aqueous medium and in dioxane-water mixtures, were in the  order of Nd(III) < Sm(III) < Gd(III) < Dy(III) < Er(III).

 

The protonation constants of iminodiacetic acid (H2 ida)  and the stability constants of its complexes with Nd(III), Sm(III),  Gd(III), Dy(III), and Er(III) ions at metal/ligand mole ratios of 1:1,  1:2, and 1:3 at 25 °C and 0.1 M ionic strength in aqueous medium and  20%, 45%, and 70% w/w dioxane-water mixtures were determined by the  potentiometric method using the BEST computer program.  The stability  constants of the complexes that formed increased as the dioxane  content increased.  The stability of all the analogues' complexes,  both in aqueous medium and in dioxane-water mixtures, were in the  order of Nd(III) < Sm(III) < Gd(III) < Dy(III) < Er(III).

Article Details

Potentiometric Determination of the Stability Constants of Lanthanide Complexes with Iminodiacetic Acid in Water and Dioxane-Water Mixtures

Authors: Sevgi ARZIK | Ebru MAVİOĞLU AYAN and A. Sedat ÇELEBİ

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 2008 Vol.32 Issue 6, pp.721-729

Document Type: Article

Publication Date: 5/2008

Document Language: Turkish

Document ID (Org No.): 2000728406

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Sevgi ARZIK | Ebru MAVİOĞLU AYAN and A. Sedat ÇELEBİ

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2008 Vol.32 Issue 6, pp.721-729

Document Type:

Article

Publication Date:

5/2008

Document Language:

Turkish

Document ID (Org No.):

2000728406

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527