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

使用 DOS 二极管阵列紫外-可见分光光度法改进本科化学课程

• 批准号: 9451290
• 负责人: Frances Crean
• 金额: $ 0.74万
• 依托单位: Saint Xavier University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9451290&HistoricalAwards=false
• 关键词: Improving; Undergraduate; Chemistry; Curriculum; using

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.

小行星9451290 普通化学和分析化学的本科实验室课程将使用配备吸管的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能够记录被分析物质和混合物的整个紫外和/或可见光吸收光谱。由于基于DOS的分光光度系统可以定量混合物中的组分，因此现在可以在普通化学课程中包括动力学实验，给出浓度与时间的数据。实验室课程的增强和增加将有助于（1）促进学生的知识基础，以决定如何采取分光光度计数据和（2）提高学生对（2a）平衡系统，（2b）反应动力学和（2c）可见分光光度计，化学物种的颜色和d-电子能级之间的关系的理解。此外，学生将使用的仪器与他们在工业和医疗保健竞技场中遇到的仪器相当。