| Autor: |
Gabryel-Skrodzka M; Faculty of Chemistry, Adam Mickiwicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznań, Poland., Nowak M; Faculty of Chemistry, Adam Mickiwicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznań, Poland., Teubert A; Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland., Jastrzab R; Faculty of Chemistry, Adam Mickiwicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznań, Poland. |
| Abstrakt: |
The activity of phosphate groups of phosphoethanolamine and pyrimidine nucleotides (thymidine 5-monophosphate, cytidine 5-monophosphate and uridine 5'monophosphate) in the process of complexation metal ions in aqueous solution was studied. Using the potentiometric method with computer calculation of the data and spectroscopic methods such as UV-Vis, EPR, 13 C and 31 P NMR as well as FT-IR, the overall stability constants of the complexes as well as coordination modes were obtained. At lower pH, copper(II) ions are complexed only by phosphate groups, whereas the endocyclic nitrogen atom of nucleotides has been identified as a negative center interacting with the -NH 3 + groups of phosphoethanolamine. |
