New types of molecules, tetrasilylsilanes with the arms composed of oligothienylsilylvinyl units, were prepared by the platinum-catalyzed hydrosilation reactions. UV–Vis absorption and fluorescence properties of these molecules have been investigated. Polymer 9 showed good heat resistance against Td10 (10% weight loss temperature) at 402 °C even in air.
A series of thiophene-based homologues with a silicon core surrounded by mono-, bi-, terthiophene, and their derivatives with alkylsilyl linkages has been prepared using hydrosilylation and Stille coupling methods. (C) 2004 Elsevier Ltd. All rights reserved.
Bithienylsilanes: unexpected structure and reactivity
with chlorodimethylsilane, dichloromethylsilane and trichlorosilane. It was shown that 5-(2,2′-bithienyl)dimethylsilane possesses higher reactivity in the hydrosilylation reaction of monosubstitutedacetylenederivatives compared with (2-thienyl)dimethylsilane. The elongation of the π-conjugated chain leads to increasing selectivity of the hydrosilylation reaction. An unusual structure for bis[5-(2,