We report the preparation of chiral silica using a linear polysiloxane main chain with a preferred-handed helical structure as the template. Poly(methylvinyl siloxane) (PMVS) with a cysteine derivative side chain designated as PMVS-Cys was prepared using anionic polymerization and an ene-thiol reaction. PMVS-Cys forms a helical conformation in both solution and film via hydrogen bonding between amide groups at side chains. The helical structure remains during the calcination process, resulting in silica with helical structure. The silica with a helical structure shows optical activity.

中文翻译：

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具有优先手性螺旋构象的线性聚硅氧烷的手性转移


我们报道了使用具有优先手螺旋结构的线性聚硅氧烷主链作为模板制备手性二氧化硅。使用阴离子聚合和烯-硫醇反应制备了具有半胱氨酸衍生物侧链（称为 PMVS-Cys）的聚（甲基乙烯基硅氧烷）（PMVS）。 PMVS-Cys 通过侧链酰胺基之间的氢键在溶液和薄膜中形成螺旋构象。在煅烧过程中螺旋结构保留下来，形成具有螺旋结构的二氧化硅。具有螺旋结构的二氧化硅显示出光学活性。