NANOSPACE ENGINEERING IN METHYLVIOLOGEN MODIFIED HECTORITE-LIKE LAYERED SILICATES WITH VARIED LAYERED CHARGE DENSITY FOR THE ADSORBENT DESIGN

摘要

Controlling spatial distribution (homogeneous distribution or clustering) of organic species in a confined nanospace is an important subject to bring out novel functions of the adsorbed molecules and to produce a specific reaction container with nanometer-scale. Smectites are useful scaffolds to create nanospace by the intercalation of organic species into the two-dimensional expandable interlayer spaces as so-called "pillar".12 Selecting pillaring agents with different molecular structure and smectites with different cation exchange capacity (CEC) results in the controlled molecular sieving functions for nonionic organic compounds1,3 and photofunctions derived from molecular distribution of photoactive molecules.4 However, some characteristics, which depend on the origin of smectites, as position of isomorphous substitution and particle size make it difficult to discuss the effects of CEC on the physicochemical properties of smectites and their intercalation compounds. Therefore, there is a need to prepare smectites with a series of CEC.