[FT-IR study on the solid-state reaction of bilirubin on BaF2].
Bilirubinate complexes are the main component of pigment gallstones and the recent researches suggested that bilirubin free radical plays a role in some biological processes. In this paper the solid-state reaction of bilirubin on BaF2 was examined by FT-IR. The solid-state reaction was produced by grinding the crystalline bilirubin and single crystals BaF2 together in an agate mortar. From the results the free radical mechanism is suggested in the solid-state reaction of bilirubin on BaF2. The replacement of H on NH of pyrrole by Ba2+ was prior to that of H on COOH. The structure of the resultant complex from the solid-state reaction is different compared with that from the liquid-state reaction.
Yang
Z
Z
College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing.
Weng
S
S
Wu
J
J
D017609:Barium Compounds / Q000737:chemistry*; D001663:Bilirubin / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
D017609:Barium Compounds; D005609:Free Radicals; C055150:barium fluoride; D005459:Fluorides; D001663:Bilirubin