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用红外光谱法跟踪化学反应变化,一直是化学工作者感兴趣的问题,因为所得中间产物的信息不但能使人们直观地了解其反应机理,而且对改进反应条件、提高产品收率有着重要的作用。人们也渴望能用红外光谱法来探索物质在动态过程中微结构的变化规律,例如塑料在变形过程中所发生的分子间滑移、结晶体的取向以及无定形体的拉伸等,以期能在充分了解产品结构与性能关系的基础上改善其性能。但因实验条件的限制,这些愿望长期以来未能实现。快速扫描付里叶变换红外光谱仪(FTIR)的出现,虽使样品扫描时间大为缩短,但仍无法直接跟踪反应过程,因为中间产物的寿命或微结构的变化过程只有数微秒至数百毫秒。因此需要寻找新的途径。
Tracking changes in chemical reactions by infrared spectroscopy has long been of interest to chemists because the information on the resulting intermediates not only provides an intuitive understanding of the reaction mechanism but also plays an important role in improving reaction conditions and improving product yield . People are also eager to use infrared spectroscopy to explore the dynamic changes of microstructure during the material, such as the plastic in the deformation process occurred during the intermolecular slippage, the crystal orientation and amorphous body stretching, etc., in order to be in the Fully understand the relationship between product structure and performance to improve its performance. However, due to the limitations of experimental conditions, these aspirations have not been fulfilled for a long time. The rapid scanning Fourier transform infrared spectroscopy (FTIR), although the sample scanning time is greatly reduced, but still can not directly track the reaction process, because the life of the intermediate product or microstructure changes only a few microseconds to hundreds of milliseconds . So need to find new ways.