Masao Kaneko

Solar energy conversion by functional polymers

3 Photoindueed Charge Separation and Electron Relay in Molecular and Polymer Assemblies . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Conversion Systems on Molecular Assemblies . . . . . . . . . . . . 8 3.2 Polymer Systems in Solution . . . . . . . . . . . . . . . . . . . 14 3.3 Polymer Systems as Solid Phase . . . . . . . . . . . . . . . . . . 22 3.4 Polymer Supported Meta l Colloids as Catalyst . . . . . . . . . . . 26

Photoluminescence of polysiloxane containing mesogenic 4-cyanobiphenyl in solution

Photoluminescent characteristics of polysiloxane containing pendant mesogenic 4-cyanobiphenyl (CB) [Si(Me)(R)O] x [Si(Me)(R)O] y (R= (CH 2 ) 3 COOH, R= (CH 2 ) 3 COOPhPhCN) and its monomeric analogues were studied in THF solution. An excimer formation was observed, and the increase in CB content in polysiloxane induced the increase in the fluorescence intensity from the excimers. The fluorescence decays were analyzed by triexponential function. A high CB content induced small decay rates, indicating the decrease of nonradiational decay. Such suppression of the nonradiation decay in higher CB content was explained by a strong mesogenic interaction between CB groups in solution.

Polymer-Metal Complexes for Solar Energy Conversion

Solar energy conversion is an attractive and important research subject, which aims at the development of permanent and clean energy. Since solar irradiation is intermittant, it is desirable to store the converted energy as a form of fuel in order to use it efficiently. For this purpose, photochemical conversion is most suited to produce fuels directly from the irradiation. It is encouraging to know that photosynthesis in green plants, which actually supports all the life on the earth, is based on photochemical processes. In the solar energy conversion research field, utilization of polymers or molecular assemblies has begun to attract much attention.1–7

Oxidative Polymerizabilities of Substituted Aromatic Amines in Aqueous Solutions of Iron Chelates

酸素共存下,p-フェニレンジアミン(PD)とアニリソ(An)を銅ピリジン系で反応させると,ポリ(アゾフェニレン)の生成が抑制され,4,4-ジアミノアゾベンゼン(2量体)が生成してくる。2量体の収率は反応温度が高いほど大きく,触媒(銅ピリジン)濃度に逆比例するが,系のモル比[An]/[PD]=1.0において極大を示す。2量体生成に及ぼすアニリン以外のモノアミン添加効果は塩基度の順序(p-トルイジン>アニリン>p-ニトロアニリン)となる。