Access in Nanoporous Materials Mesostructures A New Family of Mesoporous Molecular Sieves Recent Advances in Synthesis and Catalytic Applications of Mesoporous Molecular Sieves Synthesis of Surfactant Templated Mesoporous Materials from Homogeneous Solutions Carbon and Layered Materials New Directions with Carbogenic Molecular Sieve Materials Layer Rigidity in Intercalation Compounds Pillared Clays and Ion Exchanged Pillared Clays as Gas Adsorbents and as Catalysts for Selective Catalytic Reduction of No Applications of Electrochemistry to the Study of Transport Phenomena in Layered Clays New Materials Construction of Microporous Materials from Molecular Building Blocks Sol Gel Processing of Amorphous Nanoporous Silicas: Thin Films and Bulk Chemical and Electrochemical Reactions in Porous Sol Gel Materials Structure and Reversible Anion Exchange in Copper Hydroxy Double Salts Characterization of Zeolites and Related Media Structure Related Diffusion in Nanoporous Materials Recent Progress in the Study of Intracrystalline Diffusion in Zeolites by Chromatographic and ZLC Techniques Structural Effects on the Adsorptive Properties of Molecular Sieves for Air Separation Critical Appraisal of the Pore Structure of MCM 41 Computer Modelling of Sorption in Zeolites Characterization of Nanoporous Materials Electronic Structure Theory for Zeolites Transport Processes Pore Size Permeability and Electrokinetic Phenomena A Molecular Simulation Approach to Studying Mass Transfer Across Surface Barriers Dynamics of Liquid Crystals Confined in Random Porous Matrices Nano and Micro Structured Materials:The Role of the Interfaces in Tailoring Transport Diffusion and Magnetic Relaxation in Computer Generated Model Porous Media Quasielastic and Inelastic Neutron Scattering Studies of Layered Silicates Ionic and Electronic Transport Properties of Layered Transition Metal Oxide Conductive Polymer Nanocomposites. This series of books which is published at the rate of about one per year addresses fundamental problems in materials science. The contents cover a broad range of topics from small clusters of atoms to engineering materials and involve chemistry physics and engineering with length scales ranging from Ångstromsup to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area ofcurrent interest and brings together leading experts to give an up to date discussion of their work and the work ofothers. Each article contains enough references that the interested reader can accesstherelevant literature. Thanks aregiven to the Center forFundamental Materials Research atMichigan State University forsupportingthis series. M.F. Thorpe Series Editor E mail: thorpe@pa.msu.edu EastLansing Michigan September 1995 PREFACE This book records selected papers given at an interdisciplinary Symposium on Access in Nanoporous Materials held in Lansing Michigan on June 7 9 1995. Broad interest in the synthesis of ordered materials with pore sizes in the 1.0 10 nm range was clearly manifested in the 64 invited and contributed papers presented by workers in the formal fields of chemistry physics and engineering. The intent of the symposium was to bring together a small number ofleading researchers within complementary disciplines to share in the diversity of approaches to nanoporous materials synthesis and characterization.