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酸化鉄光触媒はその豊富さと環境適合性のために広く研究されてきたが、光生成電荷が短寿命であるなどの要因で性能が悪い。TiO2などの従来の光触媒では実現できなかった、シクロヘキサンの工業用ナイロン前駆体への選択的酸化を含む反応などのため、これまでにない高い光触媒性能を示す酸化鉄を開発した。 多孔性シリカ内に分子状酸化鉄を安定化することに成功し、鉄が二量体を形成していることを明らかにした。

The electronic structure of trimethylenemethane (TMM) radical cation has been investigated by ESR spectroscopy and ab initio MO calculations. The 4.2 K ESR spectrum of TMM+ consists of a septet with isotropic 1H hf splittings of 0.93 mT (6 H) in a CF2ClCF2Cl matrix. The ESR lineshape did not change appreciably between 4 and 125 K. Ab initio MO calculations predict that TMM+ is a 2A2 state in a distorted C2v structure, in which the unpaired electron mainly resides in the pz orbitals of the two equivalent terminal carbons. The spectra were explained by intramolecular dynamics between the three energetically equivalent C2v structures to average the structural distortion giving an apparent D3h structure even at a low temperature of 4.2 K.

Our recent results on the synthesis and properties of a novel family of polysilsesquioxanes having oligothiophenes were reviewed. The polymers anchored on SiO2 or ITO substrates showed excellent mechanical hardness due to the formation of a three-dimensional siloxane network structure and chemical linkage between polymer and the surface of metal-oxide substrates. Optical, electrochemical, and electrical properties of polymers were also investigated.