Host-guest reactions of nanospace materials (zeolites, mesoporous materials, layered materials) have been investigated from a wide range of scientific and practical interests. Here, the spatial distribution (location, density and orientation) of organic functional units (guest species) in nanospaces (one-dimensional cylindrical pore of mesoporous silicas and two dimensional expandable interlayer space of layered solids) is discussed to highlight the present status of the host-guest chemistry of nanospace materials as advanced functional materials.1,2 As a result of controlled spatial distribution of functional units in two-dimensional nanospace as well as at the external surface of platy particles of layered solids (hosts; layered silicates and transition metal oxides), one can achieve improved efficiency of photo-induced events (photoluminescence and photoinduced electron/energy transfer as a primary reaction of artificial photosyntheses), molecular sieving (adsorption) and both substrate and product selective catalytic reactions (artificial enzyme).1 In addition to the interlayer nanostructure design, hybrids with hierarchically designed nanostructures are topic of current interests. Spatial distribution of functional units in/on the mesoporous solid have also been designed to generate the novel function as well as modified properties.2 Taking advantages of the rapid progresses of nanochemistry and morphosyntheses of inorganic solids with nanospaces, as well as organic and polymer synthetic materials chemistry, the design will be more and more artistic and we can enjoy the materials chemistry further as a promising strategy of biomimetic materials chemistry. Along this line, we have been interested in morphosyntheses of layered solids (layered double hydroxides3,4 and transition metal oxides5,6) as well as mesoporous silicas7. References 1. Ogawa M., Saito K. and Sohmiya M. Eur. J. Inorg. Chem., 1126 (2015). 2. Ogawa M., Saito K. and Sohmiya M. Dalton Trans., 43, 10340 (2014). 3. Ogawa, M. and Hiramine, M. Cryst. Growth Des., 14, 1516 (2014). 4. Naito S., Nitoh K., Ayral A. and Ogawa M. Ind. Eng. Chem. Res., 51, 14414 (2012) 5. Ogawa M., Morita M., Igarashi S. and Sato S. J. Solid State Chem., 206, 9 (2013). 6. Igarashi S., Sato S., Takashima T. and Ogawa M. Ind. Eng. Chem. Res., 52, 3329 (2013). 7. Shiba K., Shimura N. and Ogawa M. J. Nanosci. Nanotech., 13, 2483 (2013).

Spatial distribution of guest in low-dimensional nanospace materials

251st National Meeting (2016)

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