Poly silastyrene

The.unusual ability of poly(silanes) to absorb UV light led to the demonstration that Asp5-doped poly(silastyrene) is a semiconductor. The band gap in common silane polymers is about 4eV in contrast to a value of almost 8eV for carbon chains. Conducting and photoconducting properties have been studied. Only holes were found mobile (mobilities of 10 cm V s at 20°C) and it appears hole transport occurs via the a electronic states of the silicon backbone rather than hopping between chain substituents. 

Poly(phenylmethylsilylene) [-SiPhMe-] and Poly(silastyrene) [-SiPhH-SiH2-]... 

MM calculations with full geometry optimization have been carried out to calculate the molecular structure and conformational energies od, ..modeJ -.cpmpounds for poly (phenylmethylsilylene) [-SiPhMe-] and poly(silastyrene) [-SiPhH-SiH2-]. In each case the calculations considered both the isotactic and syndiotactic stereochemical isomeric forms of the model compounds. The structures considered are illustrated in Figures 6 and 7. 

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