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the chapters contained in this volume. Chapters dealing with pillared clays char acterization and testing have been included to illustrate the importance of mod em characterization techniques and of test reactions in understanding the prop erties of these materials. A special acknowledgment is made of the generous financial contribution from industrial sponsors, to the many colleagues who acted as referees and to the authors for the time and effort they gave to presenting their research at the symposium and in preparing the camera ready manuscripts. We would also like to thank Professors A. Clearfield, T. J. Pinnavaia, Z. Gabelica, H. Kessler, S. Yamanaka, and to Doctors G. W. Skeel and D. E. W. Vaughan for helping to chair the symposium. Mario L. Occelli Yorba Linda, CA Harry E. Robson Baton Rouge, LA Expanded Clays and Other Microporous Solids 1 APPROACHES TO THE SYNTHESIS OF SUPER GALLERY PILLARED CLAYS Thomas J. Pinnavaia, Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824 Recent advances in the design of microporous pillared solids with "supergallery" structures are discussed. Supergallery derivatives are defined as intercalates in which the interlayer thickness is substantially larger than the thickness of the host layer. Three general classes of hosts are considered, namely, 2:1 smectite clays,layered double hydroxides (LDHs) , and layered silicic acids.
List of contents
1 Approaches to the Synthesis of Supergallery Pillared Clays.- 2 Ga13, GaA112 , and A113 Polyoxocations and Pillared Clays.- 3 Optimization of the Pillaring of a Saponite.- 4 Preparation and Properties of Pillared Synthetic Boron-Containing Saponite.- 5 Surface and Cracking Properties of Expanded Clays Dried with a Supercritical Fluid.- 6 TEM Characterization of Pillared Rectorites.- 7 Anionic Clays: Trends in Pillaring Chemistry.- 8 Preparation and Characterization of Borate Pillared Anionic Clay.- 9 Layered Silicates: The Protonation Behavior of KHSi2O5.- 10 Synthesis of Dioctahedral 2:1 Layered Silicates in an Acid and Fluoride Medium.- 11 Direct Synthesis of Novel Intercalated Layer Silicates of the Metal Silicate Type.- 12 Pillaring of Layered Inorganic Compounds: Fundamentals.- 13 Intercalation Properties of Layered Metal (IV) Phosphates Towards Organic Bases, Metal Complexes and Metal Oxides.- 14 Microporous Pillared Mica with Cation-Incorporated Silicate Surfaces.- 15 Oxygen Adsorption Properties of Microporous Silica Derived from Layered Siloxene by Oxidation.- 16 Design and Synthesis of Carbon Molecular Sieves for Separation and Catalysis.- 17 Hydrothermal Synthesis of Manganese Oxides with Tunnel Structures.- 18 Molecular Chemical Aspects of Silica Gel Formation.
