Роль гуминовых веществ в формировании наноразмерных частиц продуктов коррозии металлического железа. Панкратов Д.А., Анучина М.М. //Журнал физической химии. 2017. Т.91. №2. С.234-240.
Изучены процессы, сопровождающие коррозию металлического железа в водных растворах гуминовых веществ в условиях ограниченного доступа воздуха. Показано, что гуминовые вещества в подобных условиях выступают в роли многофункционального кислотно-основного, окислительно-восстановительного, хелаторного и поверхностно-активного реагента. При этом сами гуминовые вещества претерпевают превращения, в частности, частично восстанавливаются, и в конечном итоге адсорбируются на поверхности основного продукта коррозии железа – наночастицах Fe3O4.
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Mono- and binuclear chloridecomplexes of bismuth (III) with 2-aminopyrimidine cations depending on specific synthetic route. Trofimova T., Orlova M., Tafeenko V., Proshin A., Glazkova I., Pankratov D. //Mendeleev Communications. 2020. V.30. №2. P.202-204.
Complexes of BiIII with 2-aminopyrimidine cations with metal-to-ligand ratios of 1:3 or 2:4 (depending on reaction conditions) were synthesized and characterized by elemental analysis, 1H NMR spectroscopy, and single crystal X-ray crystallography. The possibility of conversion of the latter complex into the former one was demonstrated. The determined cytotoxicity depended on the structure of these complexes.
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Eco-Friendly Iron-Humic Nanofertilizers Synthesis for the Prevention of Iron Chlorosis in Soybean (Glycine max) Grown in Calcareous Soil. Cieschi M.T., Polyakov A.Y., Lebedev V.A., Volkov D.S., Pankratov D.A., Veligzhanin A.A., Perminova I.V., Lucena J.J. //Frontiers in Plant Science. 2019. V.10. P.413.
Iron deficiency is a frequent problem for many crops, particularly in calcareous soils and iron humates are commonly applied in the Mediterranean basin in spite of their lesser efficiency than iron synthetic chelates. Development and application of new fertilizers using nanotechnology are one of the potentially effective options of enhancing the iron humates, according to the sustainable agriculture. Particle size, pH, and kinetics constrain the iron humate efficiency. Thus, it is relevant to understand the iron humate mechanism in the plant-soil system linking their particle size, characterization and iron distribution in plant and soil using 57Fe as a tracer tool. Three hybrid nanomaterials (F, S, and M) were synthesized as iron-humic nanofertilizers (57Fe-NFs) from leonardite potassium humate and 57Fe used in the form of 57Fe(NO3)3 or 57Fe2(SO4)3. They were characterized using Mossbauer spectroscopy, X-ray diffraction (XRD), extended X-ray absorption fine structure spectroscopy (EXAFS), transmission electron microscopy (TEM) and tested for iron availability in a calcareous soil pot experiment carried out under growth chamber conditions. Three doses (35, 75, and 150 mu mol pot-1) of each iron-humic material were applied to soybean iron deficient plants and their iron nutrition contributions were compared to 57FeEDDHA and leonardite potassium humate as control treatments. Ferrihydrite was detected as the main structure of all three 57Fe-NFs and the plants tested with iron-humic compounds exhibited continuous long-term statistically reproducible iron uptake and showed high shoot fresh weight. Moreover, the 57Fe from the humic nanofertilizers remained available in soil and was detected in soybean pods. The Fe-NFs offers a natural, low cost and environmental option to the traditional iron fertilization in calcareous soils.
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