Spectroscopic Characterization of Cobalt (II) Complexes with Reduced Low-Molar Dextran Derivatives
| Autor: | Stevo Najman, Goran M. Nikolić, Žarko Mitić, Milorad D. Cakić, Sanja Mitić, Goran Nikolić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Molar
010405 organic chemistry business.industry lcsh:R chemistry.chemical_element lcsh:Medicine UV-Vis General Medicine 010402 general chemistry 01 natural sciences AAS 0104 chemical sciences Characterization (materials science) chemistry FTIR Co(II)-dextran Medicine Dextran Derivatives business Cobalt Nuclear chemistry |
| Zdroj: | Acta Facultatis Medicae Naissensis, Vol 35, Iss 1, Pp 37-48 (2018) Acta Facultatis Medicae Naissensis (2018) 35(1):37-48 |
| ISSN: | 2217-2521 0351-6083 |
| Popis: | Summary The formation of Co(II) ion complexes with reduced low-molar dextran (RLMD, Mw 5000 g/mol) was studied at the pH range from 7.0 to 13.5. The cobalt content in synthesized Co(II)-RLMD complexes was ~3–12% (AAS) and it generally increases with pH. Co(II)-RLMD complexes were characterized by UV-Vis spectrophotometry and FTIR spectroscopy. UV-Vis data for synthesized complexes indicate tetragonally distorted Oh coordination of Co(II) ions with O atoms from ligand. The presence of IR bands at 765 cm−1 and 910 cm−1 in Co(II)-RLMD complexes indicates the existence of α-(1→6)O-glycosidic bonds. The similarities in the γ(C–H) range of the IR spectra indicate that there is no difference in the conformation of the glucopyranose units in RLMD and Co(II)-RLMD complexes. The occurrence of water molecules in Co(II)-RLMD complexes was confirmed by FTIR spectroscopy of deuterated samples. |
| Databáze: | OpenAIRE |
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