Main-chain chirality global conformation

Figure 2 shows the UV absorption spectra of four optically active poly (dialkylsilane)s bearing different chiral side groups in THF at 30 °C [45]. It is evident that as the value of a increases from 0.59 to 1.25, the UV absorption intensity increases, whereas the full width at half maximum (fwhm) decreases. These results led to the finding of the semi-empirical relationship between the main chain absorption characteristics and the global conformation of various polysilanes in solution. 

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