SPECTROSCOPY AND COORDINATION CHEMISTRY OF COBALT IN MOLECULAR-SIEVES

The catalytic potential of Go-containing molecular sieves has stimulat ed zeolite scientists to study the spectroscopy and siting of Co2+ ion s. In this review, a critical overview is given of the spectroscopic t ools used: (1) to decide about the cation sites of Co2+ and their occu pancy; (2) to determine the spectroscopic signatures of framework and extraframework cobalt; (3) to determine the amount of Co incorporated into the framework of molecular sieves; and (4) to discuss local disto rtions of framework cobalt. (C) 1998 Elsevier Science B.V. All rights reserved.