Aggregation of iron-containing fullerenols in aqueous solutions
| Autor: | A. A. Szhogina, V. T. Lebedev, V. P. Sedov, Yu. V. Kulvelis |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Gadolinium-Chelate
Aqueous solution Chemistry General Chemical Engineering Inorganic chemistry chemistry.chemical_element Viscometer 02 engineering and technology General Chemistry Neutron scattering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Evaporation (deposition) 0104 chemical sciences Electrode Molecule 0210 nano-technology Carbon |
| Zdroj: | Russian Journal of Applied Chemistry. 88:2009-2014 |
| ISSN: | 1608-3296 1070-4272 |
| Popis: | Endometallofullerenols Fe@C60(OH)30 were synthesized by a new procedure using a special molecular precursor in the course of electric arc evaporation of a composite carbon electrode. Aqueous solutions of fullerenols Fe@C60(OH)30 were studied by small-angle neutron scattering (SANS) and viscometry under the conditions of transition from dilute to concentrated systems in two media: acidic (pH 3.7) and weakly alkaline (pH 7.8). In a weakly alkaline medium, fullerenols form relatively dense clusters (correlation radius R C ~ 17 nm), and in acidic medium, less dense structures of size R C ~ 18 nm in the concentration interval с = 0.5–1.4 wt %. The mechanisms of aggregation of fullerenol molecules in aqueous solutions are discussed. The water-soluble derivatives Fe@C60(OH)30 obtained show promise for biomedical applications in magnetic resonance imaging as contrasting agents that are potentially less toxic than presently used contrasts based on gadolinium chelate complexes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink