超临界CO2(scCO2)可调节的溶剂性能赋予其独特的理论研究意义和应用潜力，然而scCO2体系复杂多变的分子间相互作用及高压原位监测手段的不足已成为这一绿色技术进一步研究和应用的“瓶颈”。研发在真实条件下在线监测scCO2体系的原位光谱技术，对于揭示scCO2体系微观动态过程的奥秘或作用机制、促进scCO2技术的应用具有重要的意义。本项目拟针对现有高压原位红外光谱系统监测过程中存在的技术缺陷(如样品池耐压限低、无法搅拌及可靠性差等)，基于衰减全反射原理设计新型高压原位红外传感器，设计研制高压红外池及光路传导系统等模块，通过各功能模块间的有效集成与融合，构建高压/超临界原位中红外光谱在线监测系统，实现在线监测40MPa及200C以内在充分搅拌条件下的高压/scCO2体系物理转变或化学反应微观动态过程，为研究真实条件下scCO2体系中催化、聚合和材料合成的机理及动力学等开辟一条新的有效途径。

Environmental pollution caused by the rapid development of the chemical industry cannot be ignored. The explorations of the environmental friendly chemical process have become a target of researchers in recent years. Supercritical carbon dioxide (scCO2) technology has been applied in fields such as catalysis and materials synthesis due to its green properties and low critical temperature and pressure. The adjustable solvent properties of scCO2 endow its unique significance in both theoretical studies and potentially industrial application to catalysis, polymerization and materials synthesis. However, the complicated intermolecular interactions in scCO2 system as well as the insufficiencies in the present high-pressure in-situ monitoring systems have become the "bottleneck" of this green medium further research and application in some other fields. Studying the in-situ spectroscopy techniques in the real pressure, stirring conditions and on-line monitoring in situ spectroscopy of scCO2 system, which will help revealing the secrets of scCO2 microcosmic dynamic process or the intermolecular interaction mechanism and promoting scCO2 techniques well research and applications. This project aimed at the technical defects existing in high pressure in-situ infrared spectrum monitoring process (for example, the lower pressure resistance limitation of sample cell, non-stirring and lower reliability), based on the attenuated total reflection (ATR) FTIR can reduce the infrared optical path down to a few microns and then increase the concentration of reactants, designing and manufacturing a new type of high pressure ATR associated sensor. Designing and developing the modules of the high pressure infrared cell and light path transmission system using systematic concepts. Designing and constructing the high pressure/supercritical in-situ middle infrared spectrum on-line monitoring system through various functions module effective integrated and coalesced. Realizing the on-line monitoring for physical transforms or the chemical reaction induced by microscopic dynamic process of high pressure/scCO2 system under the pressure of 40 MPa, the temperature of 200 oC and fully stirring conditions. To study the mechanism and dynamic kinetics of catalytic reactions, the synthesis of the fluorinated polymers and the material synthesis under the real scCO2 conditions, which will open a new effective way for the investigation of scCO2 process under a real high pressure/scCO2 conditions.