Formation of homo- and heteronuclear complexes of 1-hydroxyethylidene-1,1-diphosphonic acid with MnII and FeIII in aqueous solutions
- Authors: Devyatov F.V.1, Bogatyrev O.V.1, Ignat’eva K.A.1
- 
							Affiliations: 
							- Kazan (Volga region) Federal University
 
- Issue: Vol 67, No 8 (2018)
- Pages: 1369-1375
- Section: Article
- URL: https://journals.rcsi.science/1066-5285/article/view/242787
- DOI: https://doi.org/10.1007/s11172-018-2226-0
- ID: 242787
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Abstract
Systems based on 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), iron(iii)—HEDP and manganese(ii)—iron(iii)—HEDP, were studied by pH-potentiometry combined with mathematical modeling and NMR. Diverse and highly stable heteronuclear iron manganese complexes were found to exist in the heteronuclear system. The formation of the MnH3L23–, FeMnH3L20, Fe2MnHL33–, and MnL2– complexes was established. The relaxation efficiency coefficient REC2 (relaxivity) of these complexes was evaluated at ~2000 mol–1 s–1 L. Therefore, these systems hold promise as MRI contrast agents.
About the authors
F. V. Devyatov
Kazan (Volga region) Federal University
														Email: olbogatyrev@gmail.com
				                					                																			                												                	Russian Federation, 							18 ul. Kremlevskaya, Kazan, 420008						
O. V. Bogatyrev
Kazan (Volga region) Federal University
							Author for correspondence.
							Email: olbogatyrev@gmail.com
				                					                																			                												                	Russian Federation, 							18 ul. Kremlevskaya, Kazan, 420008						
K. A. Ignat’eva
Kazan (Volga region) Federal University
														Email: olbogatyrev@gmail.com
				                					                																			                												                	Russian Federation, 							18 ul. Kremlevskaya, Kazan, 420008						
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