CONCERNING BAY SALT AND PERI CHELATE FORMATION OF HYDROXYPHENANTHROPERYLENE QUINONES (FRINGELITES)

The bathochromic shifts in the diffuse reflectance UV/Vis spectra of c ertain fringelite containing fossil species and the exceptional chemic al stability of the fringelites and their resistance against leaching on a geological time scale can be understood from the unique complexat ion behavior of the fringelites with transition metal ions. According to an absorption spectroscopic study of the model system fringelite D- alkaline earth metal and transition metal ions, the fringelites are ab le to form peri chelate complexes. In addition, fringelites bearing ba y hydroxyl groups are able to form polymeric phenolates with transitio n metal ions as well as with alkaline earth metal ions. This behavior leads to a complex network lattice consisting of these polymeric chain s crosslinked via chelate coordination at the peri regions to transiti on metal ions Like iron.