化学学报 ›› 2001, Vol. 59 ›› Issue (2): 185-188. 上一篇    下一篇

研究论文

激光等离子体诱导聚甲基硅氧烷的结构重组

周异男;黄荣彬;陈立华;于腊佳;谢素原;郑兰荪   

  1. 固体表面物理化学国家重点实验室;厦门大学化学系.厦门(361005)
  • 发布日期:2001-02-15

Structural recombination of polymethylsilicone induced by laser plasma

Zhou Yinan;Huang Rongbin;Chen Lihua;Yu Lajia;Xie Suyuan;Zheng Lansun   

  1. Xiamen Univ, Dept Chem.Xiamen(361005)
  • Published:2001-02-15

将脉冲激光束在惰性气氛中溅射石墨产生的等离子体,与一维链状聚甲基硅氧烷的蒸气束流反应,在产物中通过真空升华和重结晶分离出了两种单晶,经X射线衍射测定为具有(CH3SiO1.5)n(n=8,10)组成的硅氧烷,它们均具有多面体的三维笼状构型。通过色-质联用还检测到其它硅氧烷化合物,其中某些产物已表征为二维多环的构型,反应结果表明,经由激光等离子体的碰撞和能量传递,反应物的链状结构发生解离和进一步反应,经结构重组形成了多种不同组成和构型的产物。

关键词: 石墨, 等离子体聚合, 激光, 溅射, 有机硅化合物, 聚甲基硅氧烷, 聚硅氧烷P, 硅氧烷, 结构重排

A special synthetic reaction has been developed, in which vapor of the reactant interacts with the high temperature plasma generated by laser ablating a graphite target. By selecting chained methylsilicone as reactant, a series of methylsilsesquioxanes products with various structural configurations have been obtained. Among them, two products, which were separated by subilmation in high vacuum and recrystalization, were characterized by X-ray crystal diffraction as (CH3SiO1.5)n(n=8,10). Both of them are found to have three-dimensional cage structure. In addition, other products with double ring structure were detected by GC-MS analysis. The results demonstrate the potential application of the synthetic reaction. In the reaction described in this article, resulting from the collision and energy- transfer of the laser plasma, chain structure of the reactant dissociated and recombined to give the cage and ring structure of the products.

Key words: GRAPHITE, PLASMA POLYMERIZATION, LASER, SPUTTERING, ORGANO SILICON COMPOUNDS, METHYL-SILICONE, POLYSILOXANE P, SILOXANE, STRUCTURAL REARRANGEMENT

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