New trends in V-P-O solids

On the basis of the industrial interest of the oxovanadium phosphate cataly sts, current research effort in this field is focused mainly on the develop ment of synthetic strategies directed towards obtaining open-framework mate rials. There is a growing body of work describing preparations using hydrot hermal procedures under a diversity of conditions. A great number of new so lids, whose nets range from lamellar arrays to micro- and mesostructured or ganizations, has been prepared in last years. In this context, the applicab ility of concepts and procedures from the zeolites chemistry to systems inv olving transition elements is critically analyzed. (C) 1999 Elsevier Scienc e Ltd. All rights reserved.