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.
Tratar Pirc
Elizabeta
E
Faculty of Chemistry and Chemical Technology, Askerceva 5, SI-1000 Ljubljana, Slovenia. tratar@uni-lj.si
Arcon
Iztok
I
Kodre
Alojz
A
Bukovec
Peter
P
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