Metal-ion environment in solid Mn(II), Co(II) and Ni(II) hyaluronates.
Amorphous powders and films of some metal hyaluronate complexes of general composition (C14H20O11N)2 x xH2O (M = Mn2+, Ni2+ and Co2+) have been prepared at pH 5.5-6.0. The coordination geometry around the metal ions has been analyzed by EXAFS (extended X-ray absorption fine structure) and FTIR spectroscopy. Mn2+, Ni2+, and Co2+ ions are coordinated to carboxylate oxygen atoms and water molecules. The process of local geometry formation round the metal ions is sensitive to sample preparation.
Faculty of Chemistry and Chemical Technology, Askerceva 5, SI-1000 Ljubljana, Slovenia. tratar@uni-lj.si
Elizabeta
E
Tratar Pirc
Iztok
I
Arcon
Alojz
A
Kodre
Peter
P
Bukovec
D003035:Cobalt / Q000737:chemistry; D006820:Hyaluronic Acid / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry; D019216:Metals, Heavy / Q000737:chemistry*; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013057:Spectrum Analysis; D014965:X-Rays
D019216:Metals, Heavy; D009942:Organometallic Compounds; D003035:Cobalt; D008345:Manganese; D009532:Nickel; D006820:Hyaluronic Acid