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Russian Chemical Bulletin

, Volume 66, Issue 11, pp 2090–2094 | Cite as

Heteronuclear complexation in the system 1-hydroxyethylidenediphosphonic acid—manganese(ii)—gadolinium(iii) in aqueous solution

  • F. V. Devyatov
  • O. V. Bogatyrev
  • G. I. Zaripova
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  • 13 Downloads

Abstract

pH-Potentiometric method in combination with mathematical modeling was used to study the system manganese(ii)—gadolinium(iii)—1-hydroxyethylidenediphosphonic acid (HEDP, H4L). When both cations simultaneously are present in the solution, the accumulation of heteronuclear forms with the ratio of Gd: Mn: HEDP equal to 1: 1: 1, 1: 1: 2, and 1: 1: 3 was observed already in the strongly acidic pH region, while from homonuclear forms only five complexes were detected in the solution, namely, MnL26–, GdH4L2, GdH2L+, KGd2HL2↓, and K3Gd2L2(OH)↓. It was concluded that heteronuclear complexes are much stronger and replace homonuclear forms in solution.

Key words

bisphosphonates 1-hydroxyethane-1,1-diphosphonic acid complexation contrast agents manganese(iigadolinium(iiimagnetic resonance imaging 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • F. V. Devyatov
    • 1
  • O. V. Bogatyrev
    • 1
  • G. I. Zaripova
    • 1
  1. 1.Kazan (Volga Region) Federal UniversityKazanRussian Federation

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