The C2-, C3-, and C8-linked star-shaped isobutyl-substituted caged silsesquioxane derivatives (3a, 3b and 3c) were prepared by the hydrosilylation of mono-vinyl-, allyl- and octenylisobutyl-T8-silsesquioxane, respectively, along with the synthesis of octadimethylsiloxy-Q8-silsesquioxane. 3a and 3b formed optically transparent films. However, 3c formed an opaque white film. Wide-angle X-ray scattering measurements suggested that 3a and 3b formed more tightly packed structures after melting. However, 3c formed a less dense structure after melting. The refractive index of the film of 3a was lower than that of 3b.
- Yuta Yasumoto
- Takahiro Yamanaka
- Kensuke Naka
