Photobleaching Comparison of Poly(methylphenylsilylene) and Poly(phenylsilyne)
Photobleaching Comparison of Poly(methylphenylsilylene) and Poly(phenylsilyne)
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DOI：
10.1063/1.1808908
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发表时间：
2004-11
影响因子：
3.2
通讯作者：
W. J. Thomes;K. Simmons-Potter;C. C. Phifer-C.;B. G. Potter;G. M. Jamison;Jess E. Jones;D. Casadonte
中科院分区：
文献类型：
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作者：
W. J. Thomes;K. Simmons-Potter;C. C. Phifer-C.;B. G. Potter;G. M. Jamison;Jess E. Jones;D. Casadonte
通过研究暴露于248-和337-nm激发时吸收的变化，研究了维度对具有苯基取代基的Si基聚合物的光漂白特性的影响。聚（甲基苯基硅烯）被选为原型的线性链聚硅烷，和聚（苯基硅炔）被用作可比的网络聚硅炔。漂白行为的两种类型的聚合物的差异被解释在硅-硅键和苯基基团和硅框架之间的电子相互作用。波长依赖性效应包括苯环的光降解程度以及由于光断裂和交联引起的聚合物构型的变化。吸收的变化伴随着样品暴露区域的折射率的变化。利用折射率修正法在光敏薄膜中写入嵌入式条形波导。
The effect of dimensionality on the photobleaching characteristics of Si-based polymers with phenyl substituents was investigated by studying the change in absorption upon exposure to 248- and 337‐nm excitation. Poly(methylphenylsilylene) was chosen as an archetype of the linear-chain polysilanes, and poly(phenylsilyne) was used as the comparable network polysilyne. Differences in bleaching behavior of the two types of polymers are explained in terms of Si–Si bonding and electronic interactions between the phenyl groups and the silicon frameworks. Wavelength-dependent effects include the degree of photodegradation of the phenyl rings and changes in polymer configuration due to photoscission and crosslinking. Absorption changes were accompanied by changes in the refractive index of the exposed regions of the samples. The refractive index modification was used to write embedded strip waveguides in the photosensitive thin films.