Since optically active poly(methylpinanylsilane) synthesized by Na-mediated polycondensation of the corresponding dichlorosilane showed an Cotton effect at the UV region of Siσ-Siσ* transition of the main chain in the circular dichroism (CD) spectrum, the main chain was found to have a chirality. The Cotton bands in the presence of the (+)-isomer of a hydrophobic compound were different from those in the presence of the (−)-isomer. Therefore, this polymer was found to have an ability of the enantioselective recognition. On the other hand, a hydrophilic compound did not affect the CD band. These findings indicate that the recognition was caused mainly by hydrophobic diastereomeric interaction between the chiral compound and chiral main chain in this polymer.
通过 Na 介导缩聚相应的二氯硅烷合成的具有光学活性的聚甲基丙硅烷在圆二色性(CD)光谱中主链的 Siσ-Siσ* 转变的紫外区显示出棉带效应,因此发现主链具有手性。疏水化合物的 (+)- 异构体存在时的棉带与 (-)- 异构体存在时的棉带不同。因此,发现这种聚合物具有对映体选择性识别能力。另一方面,亲水性化合物并不影响 CD 带。这些发现表明,识别主要是由手性化合物与该聚合物中的手性主链之间的疏水非对映相互作用引起的。