激光等离子体诱导聚甲基硅氧烷的结构重组.pdf

2001年第59卷
化学学报
第2期,185~188
ACIA CIIIMICA SINICA
No.2.185~18
激光等离子体诱导聚甲基硅氧烷的结构重组
問异男黄荣彬陈立华于腊佳谢素原郑兰荪
(固体表面物理化学国家重点实验厦『」人学化学系厦」361005)
摘要将脉冲激光束作惰性气氛中溅射石墨产生的等离子体,j“维链状聚甲基仕氧烷的蒸气流反应,在产物中
通过其空升华和重结品分离出了炳利单品,经X射线行射测定为具有(CH2SO1s)n(n=8,10)组成的硅氧烷,它们
均具有多面体的维笼状构型.通过色-质联用还检测到其它佳氧烷化合物,其中某些产物已表征为二维多环的构
型.反应结果表明,经山激光等离子体的撞和能量传递,反应物的链状结构发生解离和进步反应,经结构重组形
成了多种和不同组成和构型的产物.
关键词激光溅射,等离子体合成,硅氧烷
Structural Recombination of Polyanethylsilicone Induced by Laser Plasma
ZEKOU Yi-nan HUANG Rong-bin CHEN LI-HUA YU La-jia
XIE Su- Yuan ZHENG Lan-sun
(State Key 1. aborlory for Physical Chemist Solid Suface, eamen Chemistry, Xiamen desity, imen, 361005)
Abstract 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 methylsil se squioxanes products with various structural configurations have been obtained
Among them, two products, which were separated by sublimation in high vacuum and recrystalization, were
characterized by X -ray crystal diffraction as(H Sio1.5)(n=8, 10) Both of them are found to have
three -dimensional cae structure. In addition, other products with ouble 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 laser ablation, plasma synthesis, methyl siloxane
以脉冲激光溅射戸产生的等离了体反应,是广生了一系列碳氯二元团簇;在水中激光溅射玻璃谷碳
原子闭簇、纳米材料等具有特殊微观结构和形态的合成了具有金劇石结构的纳米碳球:;在米蒸气中激
物质的一条重要途径.近年米,我们拓展∫了激光溅射光溅射海绵钛,产4了内嵌钛单晶的纳米笼1~31
的合成方法,使之不再局限于真空或惰性气氛的环最近,我们义在反应体系中引入聚基氧烷,试
境,而是与溶液及其气的化学合成常用的环境结通过激光等离子体反应,合成含硅的闭簇及其它新
合起来,通过在四氯化碳蒸气中激光溅射石,合成的物种
mail: Ischeng((xmu cdu. cn
收稿11期:20005-29,修回期:20007-18,定稿期:2000-09-18,国家自然科学金重人项日(29890210)资助课趑
(Reccived May 29, 2000. Revised J uly 18, 2000. Accepted Scplcmber 18, 2000)
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