Synthesis and Physical Properties of Poly(ethynylmethylsilane) Derivatives

抄録

Polysilanes having some kinds of 2-substituted ethynyl group directly connected to the polymer backbone were synthesized. The effects of π-conjugation system in the side chain on the optical properties of the polysilanes were studied. The polysilanes having ethynyl moiety showed no typical absorption peak arising from polysilane backbone. It was suggested that polysilanes having ethynyl moiety were random coil forms because of sterically unoccupied silicon atom. Polysilane having o-tolylethynyl group, which would show the most steric hindrance in this study, exhibited the longest wavelength of absorption peak (292 nm). We attempted to stabilize polysilane by means of assist from the π-conjugation system, which was extended by curing the cast film of the polysilane at 300°C for 20 min considering UV-Vis absorption spectra, although the chemical structure was not reveal in detail.