ケイ素-π電子系交互ポリマーの合成と機能 [in Japanese] Synthesis and Functionalities of Silicon-π-Electron System Alternate Polymers [in Japanese]
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π電子系をケイ素基で置換すると, ケイ素σ結合とπ電子系との間の軌道間相互作用などによって, π電子系の電子状態・物性に種々の影響がでることは,よく知られている。ここでは,π電子系をケイ素基で架橋した新しいタイプのポリマーの合成と発光材料, キャリヤー輸送材料としての利用についての最近の例を紹介する。
Polymers composed of an alternate arrangement of anorganosilanylene and π-electron system have been extensively studied as novel functional materials. Enhanced conjugation by the interaction between siliconσ-andπ-orbitals has been often noted in these polymers. In addition, introduction of the silicon linkage is expected to give rise to the photoactivity of the polymers and improve their solubility. ln this review, recent progress concerning the synthesis and functionalities of the Si-πalternate polymers is introduced. Poly(silylenephenylene)s bearing fluorophores as the pendant groups were reported p toh oteoxluhmibiinte shceignhcley properties even in the solid state. Exposure of the films toward UV irradiation in air led to the rapid decrease of the PL intensity of the films, being applicable to patterning of the PL images. It has been demonstrated that efficient energy transfer as well as electron transfer between the π-electron system occurs in the photoexcited states of the Si-πpolymers, indicating the potential utility of the polymers as photo harvesting materials. These kinds of the polymers have been also examined as emissive as well as carrier transporting materials for the use in electroluminescence (EL) devices.
Kobunshi 57(3), 146-149, 2008-03-01
The Society of Polymer Science, Japan