| 초록 |
Nanoengineered polypeptides can be synthesized by N-heterocyclic carbene catalyzed ring-opening polymerization of α-amino acid N-carboxyanhydrides (NCAs). Linear, hinged, star polypeptide can be easily accessible simply by changing the type of amine initiators. Copolypeptide is also prepared by tuning the type of NCAs. The degree of polymerization was measured by infrared spectroscopy and the structure of polypeptide was confirmed by nuclear magenetic resonance. Since hexavalent chromium is negatively charged, it can be adsorbed by polypeptides with positive end groups like Lysine or Histidine. Hexavalent chromium is detected by using Ultraviolet-Visible Spectroscopy at 540 nm. |
