The transient absorption of radical cations of a variety of substituted polysilanes is discussed quantitatively in terms of the molar extinction coefficient and oscillator strength by nanosecond pulse radiolysis. Oxygen -saturated polysilane solutions in benzene exhibit a strong transient absorption band ascribed to the polysilane radical cation. The transient species react with N,N,N,N-tetramethyl-p-phenylenediamine (TMPD) to produce TMPD radical cations. On the basis of the molar extinction coefficient of the TMPD radical cation, the molar extinction coefficients for the radical cations of polysilanes are found to increase in the range 3.3 x 10(4) to 2.0 x 10(5) M(-1) cm(-1) with increasing polymer segment length. The stepwise increase in the total oscillator strength with an increase in the number of phenyl rings directly bonded to the Si skeleton suggests the delocalization of the positive polaron state and/or the SOMO state over the phenyl rings, indicating the importance of phenyl rings in intermolecular hole transfer processes.
Barry et al., Journal of the American Chemical Society, 1947, vol. 69, p. 2916
作者:Barry et al.
DOI:——
日期:——
The Addition of Silicon Hydrides to Olefinic Double Bonds. Part V. The Addition to Allyl and Methallyl Chlorides
作者:John W. Ryan、Gerald K. Menzie、John L. Speier
DOI:10.1021/ja01499a031
日期:1960.7
Methyl octadecyl dichlorosilane
申请人:DOW CHEMICAL CO
公开号:US02510853A1
公开(公告)日:1950-06-06
Barra, A. J.; Pree, L. de; Gilkey, J. W., Journal of the American Chemical Society, 1947, vol. 69, p. 2916 - 2916
作者:Barra, A. J.、Pree, L. de、Gilkey, J. W.、Hook, D. E.