PREPARATION AND SPECTROSCOPIES OF LAYERED ZIRCONIUM ORGANOPHOSPHONATES CONTAINING PYRIDINIUM AND ITS DERIVATIVE CATIONS

摘要

Zirconium organophosphonates containing the pyridinium, 3-cyanopyridinium, 4-cyanopyridinium and isoquinolinium cation moieties and bromide ion as the counter anion with layered structures were synthesized. The bromide ion can be exchanged by chloride and iodide ions without leaching of these cation sites from the interlayer space. Their electronic reflectance spectra exhibit charge transfer bands between the halide ions and these pyridinium sites in the solid state. [References: 20]