(b. 1950), B.S.(1974, Waseda), M.Engr.(1976, Waseda), Ph.D.(1979, Waseda), British Counsil Scholarship (1980-1981, Univ. Aberdeen), Assistant Prof.(1982, Waseda), Associate Prof. (1984, Waseda), Prof. (1989, Waseda).
The Award of Synthetic Chemistry of Catalysts (1994), The Clay Science Society of Japan Award (1996).

keywords

Inorganic Synthetic Chemistry / Intercalation Chemistry / Silicate Chemistry / Porous Materials / Clay Chemistry / Inorganic Polymers

Room 65-405
3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan

Tel: +81-3-5286-3199

Fax: +81-3-5286-3199

E-mail: kuroda@waseda.jp

Research Interests

Inorganic synthetic and materials chemistry is the main field of our research interests. Structural control of inorganic materials at nano- and meso-scales (Nanotectonics) is currently investigated. It is quite important to design and control inorganic structures with novel functions.

1. Design of nanomaterials utilizing layered materials.
Layered materials can be regarded as inorganic polymers with sheet structures. Various molecules and ions are intercalated into the interlayer spaces to form intercalation compounds.

1) Exfoliated nanosheets are unique components in nanochemistry. We have succeeded in synthesizing extraordinarily large K₄Nb₆O₁₇ nanosheets by exfoliation of K₄Nb₆O₁₇ single crystals.

2) Interlayer surface hydroxyl groups of layered aluminosilicate kaolinite can be modified with alcohols to form new hybrid materials with unique interlayer environments surrounded by both organic moieties and silicate surfaces.

3) A bottom-up approach to construct novel silicate framework can be realized by interlayer surface silylation of layered octosilicate by alkoxychlorosilanes. Newly formed SiO₄ tetrahedra are fixed and arranged in a regular manner, leading to the formation of silica-based nanomaterials.

2.. Synthesis and structural control of mesostructured materials.

1) Mesoporous materials have attracted keen interests because of its wide range of potential applications including adsorbents and catalysts. Synthesis of mesoporous silica was firstly derived from layered silicates. Mesoporous silicas with well controlled structures have been prepared by several methods. Preparation of mesoporous metals and mesoporous silica films with uniaxially oriented mesochannels is also currently investigated.

2) Organotrialkoxysilanes with longchain alkyl groups can be converted to silica-based hybrid nanostructured materials with ordered structures. By designing starting organosilanes we can tailor hybrid materials with various nanostructures and morphologies.

3) Chlorophyllous pigments are successfully introduced intomesostructured and mesoporous materials with controlled structures as immobilizing media. The photochemical investigation clearly showed an idealized arrangement of the pigments, leading construction of artificial photosynthetic models.

Representative Publications

1. "Formation of Layered Silica-Alcohol Nanostructured Materials from Alkoxytrichlorosilanes", Chem. Mater., 15, 4768-4774 (2003).

2. "Direct Formation of Mesostructured Silica-Based Hybrids from Novel Siloxane Oligomers with Long Alkyl Chains", Angew. Chem. Int. Ed., 42, 4057-4060 (2003).

3. "Synthesis of Interlamellar Silylated Derivatives of Magadiite and the Adsorption Behavior for Aliphatic Alcohols", Chem. Mater., 15, 3134-3141 (2003).

4. "Unidirectional Orientation of Methylene Blue Intercalated in K4Nb6O17 Single Crystal", J. Phys. Chem. B, 107, 4043-4047 (2003).

5. "Alignment Control of a Cyanine Dye Using a Mesoporous Silica Film with Uniaxially Aligned Mesochannels", Chem. Commun., 2003, 284-285.

6. "Structural Control of Multilayered Inorganic-Organic Hybrids Derived from Mixtures of Alkyltriethoxysilane and Tetraethoxysilane", Langmuir, 18, 1144-1149 (2002).

7. "Transformation of Layered Docosyltrimethyl- and Docosyltriethylammonium Silicates Derived from Kanemite into Precursors for Ordered Mesoporous Silicas", Langmuir, 18, 9574-9577 (2002).

8. "Direct Silylation of a Mesostructured Precursor for Novel Mesoporous Silica KSW-2", Langmuir, 18, 8102-8107 (2002).

9. "Formation of a New Crystalline Silicate Structure by Grafting Dialkoxysilyl Groups on Layered Octosilicate", J. Am. Chem. Soc., 124, 12082-12083 (2002).

10. "Uni-Directional Orientation of Cyanine Dye Aggregates on a K4Nb6O17 Single Crystal: toward Novel Supramolecular Assemblies with Three-Dimensional Anisotropy" J. Am. Chem. Soc., 123, 6949-6950 (2001).

11. "Formation of Novel Ordered Mesoporous Silicas with Square Channels and the Direct TEM Observation" Angew. Chem. Int. Ed., 39, 3855-3859 (2000).

12. "Preferred Alignment of Mesochannels in a Mesoporous Silica Film Grown on a Silicon (110) Surface" J. Am. Chem. Soc., 121, 7618-7624 (1999).

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