Improving the Undergraduate Chemistry Curriculum using DOS Diode-Array Ultraviolet - Visible Spectrophotometry

9451290 Crean普通化学和分析化学的本科实验课程将使用配备sipper的DOS二极管阵列紫外-可见分光光度计系统进行改进。由于使用二极管阵列仪器可以在几秒钟内记录溶液的整个光谱，因此普通化学实验室部分的所有学生都将能够记录被分析的物种和混合物的整个紫外和/或可见吸收光谱。由于基于DOS的分光光度法系统可以定量测定混合物中的组分，因此现在可以在普通化学课程中包括给出浓度与时间数据的动力学实验。对实验课程的增强和补充将服务于(1)促进学生的知识基础，以决定如何采用分光光度法数据；(2)提高学生对（2a）平衡系统，（2b）反应动力学，（2c）可见分光光度法，化学物质的颜色和d电子能级之间关系的理解。此外，学生将使用与他们在工业和医疗保健领域遇到的仪器相当的仪器。

9451290 Crean The undergraduate laboratory curricula for General Chemistry and Analytical Chemistry will be improved using a DOS diode-array ultraviolet-visible spectrophotometric system equipped with a sipper. Since the entire spectrum of a solution can be recorded in a few seconds using a diode-array instrument, all students in a general chemistry laboratory section will be able to record the entire ultraviolet and/or visible absorption spectra of species and mixtures being analyzed. Because the DOS based spectrophotometric system can quantitate the components in a mixture, it will now be possible to include a kinetics experiment giving concentration versus time data in the General Chemistry curriculum. The enhancements and additions to the laboratory curriculum will serve (1) to facilitate students' knowledge bases for making decisions about how to take spectrophotometric data and (2) to improve students' understandings of (2a) equilibrium systems, (2b) kinetics of reactions, and (2c) relationships among visible spectrophotometry, colors of chemical species, and d-electron energy levels. Additionally students will be using instrumentation comparable to that which they will encounter in industry and in the health care arena.