Quantitation of Iron(III) Ions Complexed by Tetraphenylporphyrin and Its Effect on the Structure of Ultrafine Poly(3-Hydroxybutyrate) Fibers
| Autor: | Vasily Ovchinnikov, A. V. Lobanov, A. G. Filatova, V. S. Markin, A. L. Iordanskii, A. V. Bychkova, A. A. Ol’khov, R. Yu. Kosenko |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science General Engineering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electrospinning Amorphous solid law.invention chemistry.chemical_compound Crystallinity Ultraviolet visible spectroscopy chemistry law 0103 physical sciences Tetraphenylporphyrin Molecule General Materials Science Crystallite 0210 nano-technology Electron paramagnetic resonance Nuclear chemistry |
| Zdroj: | Inorganic Materials: Applied Research. 11:886-892 |
| ISSN: | 2075-115X 2075-1133 |
| Popis: | We demonstrate a methodical approach to quantitation of iron ions on the surface and in bulk of ultrafine fibrous materials of poly(3-hydroxybutyrate) (P3HB), taking the tetraphenylporphyrin iron(III) chloride (FeClTPP) complex as an example. Ultrafine fibers based on the P3HB biopolymer and containing 1–5 wt % of FeClTPP are fabricated by electrospinning. As analytical techniques, UV spectroscopy and electron paramagnetic resonance (EPR) are successfully used for quantitation of iron(III) species. We identify the effect of the complex on the crystalline phase and segmental mobility of P3HB molecules in amorphous domains of the ultrafine fibers. Adding small amounts of FeClTPP (up to 5%) leads to a marked increase in the crystallite size and the degree of P3HB crystallinity and to densification of the amorphous regions. Our findings suggest that UV spectroscopy and EPR are promising analytical techniques for quantitation of iron ions in nonwoven fibrous sorbents designed for removal of oil products and heavy metals from waste waters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink