Luminescence Spectroscopy in Molecular Assemblies and New Energy Conversion Materials: Integration Across the Undergraduate Curriculum

分子组装和新能源转换材料中的发光光谱：本科课程的整合

• 批准号: 0837398
• 负责人: Scott Saavedra
• 金额: $ 14.99万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-02-01 至 2012-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0837398&HistoricalAwards=false
• 关键词: Luminescence; Spectroscopy; Molecular; Assemblies; New

Chemistry (12)Intellectual Merit. A collaborative group of educators from the Chemistry Department or from the Biochemistry & Molecular Biophysics Department are implementing the use of two fluorescence spectrophotometers as a means for catalyzing an integrated modification of the undergraduate chemistry and biochemistry laboratory curriculum. The modified curriculum is providing undergraduate students with a broad introduction to luminescence and associated topics, including a multiyear exposure to the scientific processes underlying solar energy conversion and energy transport in both synthetic and living systems. A thorough and integrated introduction to luminescencespectroscopies and luminescent materials in the undergraduate curriculum has become important for a number of reasons. Fluorescent assays are widely used in the characterization and analysis of biological and biomimetic materials, and in parallel with the sequencing of the human genome there has been an explosion in the use of single molecule fluorescence studies in all areas of bioscience. Luminescence spectroscopy is at the heart of the development of many forms of nanoscience, especially the development of new nanomaterials for solar energy conversion. By offering practical and in-depth laboratory experiences that explore these important topics, students are enhancing their understanding of fluorescence as a probe of the dynamics of molecular systems and are becoming familiar with recent advances in contemporary research fields such as solar energy conversion, nanoscience, and biochemical fluorescence spectroscopy. The fluorescence spectrophotometers are being used by both Chemistry and Biochemistry undergraduates, in years three and four of their curriculum, including in Analytical, Physical and Inorganic Prep classes, along with a Biochemical Techniques laboratory. Experiments are being developed that investigate a) light absorption and excited state creation, energy transfer, and luminescence decay; b) fluorescence emission, resonance energy transfer (FRET), and anisotropy in molecular assemblies, emphasizing the effect of microenvironment on these processes; c) biochemical applications of anisotropy and FRET in measurements of biomacromolecular binding affinity and reaction kinetics; and d) the competition between luminescence and electron transfer in solar energy conversion systems created from linked semiconductor and oxide nanoparticles. The last of these involves a cross-course collaborative capstone experience for students in Inorganic and Physical Chemistry laboratories. Experiments are being designed using a "bottom-up" approach so that appropriate overlap of the most significant issues occurs throughout the students' training.Broader Impacts. Approximately 250 students are enrolled in the affected courses each year. As a result of this curricular modification, these students are developing an enhanced understanding of fluorescence and a number of related topics while being exposed to important areas of contemporary research. They are gaining appreciation for the collaborative and cross-disciplinary nature of science. Under the guidance of the faculty, graduate teaching assistants carry out much of the experimental development, and are benefiting both educationally and professionally. An additional solar energy education outreach component is being implemented in collaboration with the undergraduate chemistry club. Materials developed over the course of the project will be made accessible to the wider scientific community.

化学（12）知识价值。 来自化学系或生物化学分子生物物理系的教育工作者的协作组正在实施两个荧光光度计的使用，作为催化本科化学和生物化学实验室课程的综合修改的手段。修改后的课程为本科生提供了对发光和相关主题的广泛介绍，包括多年暴露于合成和生命系统中太阳能转换和能量传输的科学过程。在本科课程中，对发光光谱学和发光材料进行全面和综合的介绍已经变得非常重要，原因有很多。 荧光测定广泛用于生物和仿生材料的表征和分析，并且与人类基因组的测序平行，在生物科学的所有领域中，单分子荧光研究的使用已经出现爆炸式增长。发光光谱学是许多形式的纳米科学发展的核心，特别是用于太阳能转换的新型纳米材料的发展。通过提供探索这些重要主题的实践和深入的实验室经验，学生们正在加强对荧光作为分子系统动力学探针的理解，并熟悉当代研究领域的最新进展，如太阳能转换，纳米科学和生化荧光光谱。化学和生物化学本科生在其课程的第三和第四年，包括分析，物理和无机准备课程，沿着生物化学技术实验室，都使用荧光光度计。正在开发的实验研究a）光吸收和激发态产生、能量转移和发光衰减; B）分子组装中的荧光发射、共振能量转移（FRET）和各向异性，强调微环境对这些过程的影响; c）各向异性和FRET在生物大分子结合亲和力和反应动力学测量中的生物化学应用;和d）在由连接的半导体和氧化物纳米颗粒产生的太阳能转换系统中发光和电子转移之间的竞争。其中最后一个涉及无机和物理化学实验室学生的跨课程协作顶点体验。实验的设计采用了“自下而上”的方法，以便在整个学生培训过程中适当重叠最重要的问题。每年大约有250名学生注册参加受影响的课程。由于这一课程的修改，这些学生正在开发荧光和一些相关的主题，同时接触到当代研究的重要领域的增强理解。他们越来越欣赏科学的协作和跨学科性质。在教师的指导下，研究生助教进行了大量的实验开发，并在教育和专业方面受益。目前正在与本科生化学俱乐部合作实施一个额外的太阳能教育外联部分。在项目过程中编写的材料将提供给更广泛的科学界。