Engineering Research Equipment: A FTIR Spectrometer Coupled with an Ultraviolet Light Source for Polymerization Reaction Engineering and Catalysis

鲍曼 9500477 PI计划购买一台傅里叶变换红外光谱仪，供科罗拉多大学化学工程系使用。 该仪器将用于研究紫外光引发聚合和紫外光引发聚合的分子过程。 FTIR光谱仪具有研究这些过程所需的高分辨率（0.3 cm-1）和高速度（每秒20次扫描），即使在室温下也很快。 除了光谱仪和相关的计算机外，还将购买一个光纤紫外光源、滤光器和多个内反射附件，同时将建造一个用于催化研究的可控气氛室。 这台分光计将配备两个样品/检测室，以便两名调查人员能够有效地使用。 用于生产高度交联聚合物的聚合反应将由UV光引发，并且将采用用于研究反应扩散终止机制的新技术。 该技术涉及在UV光关闭后监测双键转化的微小变化。 以这种方式，反应扩散的重要性将被确立，并且反应扩散常数将被测量。 利用FTIR光谱仪研究了有机物在二氧化钛催化剂上光催化氧化过程中反应物和中间体表面浓度的变化以及吸附中间体的识别。 这些瞬态测量将有助于识别反应步骤，并在与反应产物的质谱检测相结合时测量它们的速率。 程序升温解吸和反应也将用于确定吸附物浓度。 增加傅里叶变换红外光谱仪将加强目前在这些领域正在进行的资助研究。 预计该光谱仪在其他聚合和催化研究中也将有价值。 目前，工学院没有红外光谱仪。 两位PI都有在其他大学使用FTIR光谱仪的经验。 科罗拉多大学将分担购买该设备价格的40%，而该设备将由两个PI的研究赠款进行维护。

Bowman 9500477 The PIs plan to purchase a Fourier Transform Infrared (FTIR) Spectrometer for use within the Department of Chemical Engineering at the University of Colorado. This instrument will be used to study the molecular processes involved in UV-initiated polymerizations and in UV photocatalysis. The FTIR spectrometer has the high resolution (0.3 cm-1) and high speed (20 scans per second) required to study these processes, which are fast even at room temperature. In addition to the spectrometer and associated computer, a fiber-optic UV light source, filters, and multiple internal reflectance accessory will be purchased while a controlled-atmosphere cell for catalytic studies will be constructed. This spectrometer will be equipped with two sample/detection compartments so that it can effectively be used by two investigators. Polymerization reactions for the production of highly cross-linked polymers will be initiated by the UV light, and a novel technique for studying reaction diffusion termination mechanisms will be employed. This technique involves monitoring small changes in the double bond conversion after the UV light has been turned off. In this manner the importance of reaction diffusion will be established, and the reaction diffusion constant will be measured. The changes in surface concentrations of reactants and intermediates and identification of adsorbed intermediates will be measured with the FTIR spectrometer during photocatalytic oxidation of organics on titania catalysts. These transient measurements will help identify reaction steps and measure their rates when combined with mass spectrometric detection of reaction products. Temperature-programmed desorption and reaction will also be used to identify adsorbate concentrations. The addition of an FTIR spectrometer will enhance funded research that is currently in progress in these areas. It is anticipated that the spectrometer will also be valuable in other polymerization and catalysis research. At presen t, there is no IR spectrometer in the College of Engineering. Both PIs have experience at other universities with FTIR spectrometers. The University of Colorado will aost share 40% of the purchase price of this equipment, and the equipment will be maintained by research grants of the two PIs.