Olefin metathesis over UV-irradiated silica
Olefin metathesis over UV-irradiated silica
复制标题
紫外线照射二氧化硅上的烯烃复分解
DOI：
10.1016/s0169-4332(97)00309-7
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发表时间：
1997
影响因子：
6.7
通讯作者：
S. Yoshida
中科院分区：
文献类型：
--
作者：
Tsunehiro Tanaka;Shigehiro Matsuo;T. Maeda;H. Yoshida;T. Funabiki;S. Yoshida
在高于800K的温度下抽真空的光照射二氧化硅对烯烃歧化反应具有活性。产物分析表明，中间体很可能是金属环丁烷。反应对辐射的瞬时响应和不同紫外滤光片的活性变化表明，该反应是由二氧化硅的紫外光激发引起的。抽空温度与活性的相关性表明，表面无水分子在反应中起着一定的作用，游离羟基的去除与活性中心的产生密切相关。
Photoirradiated silica evacuated at temperatures higher than 800 K was found to be active for olefin metathesis reactions. The analysis of products shows that the metalacyclobutane intermediate is likely. The instantaneous response of the reaction to the irradiation and the activity change with various UV filter showed that the reaction is induced by UV-excitation of silica. The correlation between the evacuation temperature and the activity showed that the surface free from water molecules plays a role in the reaction and the removal of isolated OH groups strongly relates to the generation of active sites.