Studies of chain conformational kinetics in poly(di‐n‐alkylsilanes) by spectroscopic methods. III. Fourier transform Raman studies of unsymmetric side chain substitution
Studies of chain conformational kinetics in poly(di‐n‐alkylsilanes) by spectroscopic methods. III. Fourier transform Raman studies of unsymmetric side chain substitution
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通过光谱方法研究聚（二正烷基硅烷）的链构象动力学 III。
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
J. Rabolt
中科院分区：
文献类型：
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作者：
V. Hallmark;R. Sooriyakumaran;R. D. Miller;J. Rabolt
傅里叶变换拉曼光谱（FT - Raman）已被用于获得在320和370 nm之间没有共振效应的聚硅烷衍生物的光谱。非共振FT - Raman光谱允许对烷基侧基的构象和侧相互作用进行详细的分析。对一系列非对称取代化合物聚（正戊基，正己基硅烷）、聚（正庚基，正己基硅烷）和聚（正辛基，正己基硅烷）与对称取代类似化合物聚（二正己基硅烷）的光谱进行比较，揭示了由于侧链长度不匹配而导致的不同程度的分子内和分子间无序性。诱导的失序与转变温度和UV - vis吸收最大值密切相关。
Fourier transform Raman (FT‐Raman) spectroscopy has been used to acquire spectra of polysilane derivatives in the absence of resonance effects arising from electronic absorptions of these materials between 320 and 370 nm. The nonresonant FT‐Raman spectra allow detailed analysis of the conformation of and lateral interactions between alkyl side groups. Comparison of spectra for the series of unsymmetrically substituted compounds poly(n‐pentyl,n‐hexylsilane), poly(n‐heptyl,n‐hexylsilane), and poly(n‐octyl,n‐hexylsilane) with the symmetrically substituted analog poly(di‐n‐hexylsilane) reveals various degrees of intra‐ and intermolecular disorder due to mismatch of side chain length. The induced disorder is well correlated with transition temperatures and UV‐vis absorption maxima.