官能基を有するケイ素オリゴマーおよびポリマーの特異な挙動
スポンサーリンク
概要
- 論文の詳細を見る
Synthesis, structure, and electronic properties of silicon chains functionalized with hypervalent silicon moieties, polar substituents, or transition metal clusters are reported. Absorption spectra of pentacoordinate silicon oligomers reveal that the introduction of pentacoordinate silicon moieties into oligosilanes leads to a drastic change of the σ<SUB>SiSi</SUB>-σ<SUP>*</SUP><SUB>SiSi</SUB> excitation energies. <SUP>29</SUP>Si NMR spectra have proved that the conformations of pentacoordinate oligosilanes are tightly locked even in room-temperature solution. UV-VIS spectra of polysilanes having polar substituents like (alkoxycarbonyl) methyl groups suggest that polar substituents effectively promote the σ-conjugation of the silicon backbones. Electron delocalization in (-Si-Ru-Ru-Si-C<SUB>6</SUB>H<SUB>4</SUB>4-) <SUB>n</SUB> polymers was demonstrated by the absorption spectra. Solvent-sensitive structural deformation of the Si-Ru-Ru-Si unit leads to change of the optical properties.
- 社団法人 有機合成化学協会の論文
- 2001-10-01