THE NEW MICROPOROUS COMPOUNDS AND THEIR DESIGN

After a historical description of the different families of porous com pounds and their synthesis pathways, the paper describes a particular system, the ULM series, and the correlation between the evolution of t he pertinent chemical parameters and the structure of the resulting ma terials. The hypothesis for a possible mechanism of formation of these porous solids is rested both by in situ experiments (NMR and synchrot ron radiation) in hydrothermal conditions and from the examination of its possible consequences, principally in the domain of magnet ic poro us compounds. The analysis of its limits leads to a new family of comp osite inorganic organic porous solids in which organic and inorganic p arts participate in the framework.