【摘要】 用钠缩合法合成了 (甲基 ) (对甲氧基苯基 )二氯硅烷均聚及分别与二甲基二氯硅烷、甲基苯基二氯硅烷、二苯基二氯硅烷共聚的四种聚硅烷 .用IR、H1 NMR、GPC作了结构表征 .从组成、链长和分子链对称性等方面讨论了其荧光性质有较大差异的原因 .结果表明 ,苯基对位甲氧基的给电子效应使最大荧光发射波长λmax略有红移 ,但影响并不显著 ;聚硅烷链长和分子链对称性对荧光强度的影响比较显著 ,Si—Si链较长或分子链对称性较好的聚硅烷荧光强度较大 .更多还原

【Abstract】 Poly（p-methoxyphenylmethylsilane）, poly（dimethylsilane-co-p-methoxyphenylmethylsilane）, poly（methylphenylsilane-co-p-methoxyphenylmethylsilane） and poly （diphenylsilane-co-p-methoxyphenylmethylsilane） were synthesized by the condensation reaction of their corresponding dichlorosilanes with sodium. The structures of the Polysilanes were characterized by means of IR, H¹NMR, and GPC. The obvious difference of their fluorescence properties was discussed in the view of their composition, chain length and symmetry of the Polysilanes. The results showed that the donating para-methoxy group on phenyl caused λ_max, the maximum emitting wave length, of a Polysilane a little Einstein shift, but not notable. The chain length and symmetry of a Polysilane have a remarkable effect on their fluorescence strength, a Polysilane with a longer Si—Si chain or better symmetry has a stronger fluorescence.更多还原