CAREER: The Nature of Excitations in Dendrimers and Educational Development of the Physical Properties of Macromolecules

职业：树枝状聚合物的激发性质和大分子物理性质的教育发展

• 批准号: 0134691
• 负责人: Theodore Gore Goodson
• 金额: $ 40万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-15 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0134691&HistoricalAwards=false
• 关键词: CAREER; Nature; Excitations; Dendrimers; Educational

This CAREER award involves ultra fast spectroscopic investigations of dendrimers. Initially, femtosecond time-resolved measurements will be carried out with an upconversion setup on both homogeneous and inhomogeneous dendrimer systems in order to investigate the coherent nature of the excitations. The long radiative lifetimes of several of the novel dendrimer systems will also be measured by time-correlated single-photon counting measurements. These initial studies will also determine superior candidates for other light emitting applications as well. In the second stage of the anisotropy measurements in order to probe the fast kinetics of the energy migration process in organic dendrimers. In order to measure the homogeneous line-width more quantitatively as well as the dephasing dynamics in the dendrimer systems that possess strong interactions, he will carry out three pulse photon echo experiments. With this information quantitative comparisons to various excitonic theoretical predictions can be carried out. This research will help answer an important question that not only concerns organic dendrimers, but also concerns excitations in any branched (fractal) molecular geometry. The question, how do we describe the coherent nature of strongly interacting branched chromophores, will have a significant impact on the materials science, photo-physics, and technological communities.%%%The CAREER educational plan is focused on the physics and characterization of macromolecules. The first component is to expose undergraduate students to the real world of research and developments in industry that is concerned with the physical properties of macromolecules. Secondly, the PI will integrate these programs into larger group interactions. This will include both undergraduate and younger high school students in the Detroit Metro public school district, an area that has been underrepresented in science in the past. This will be done in conjunction with ongoing programs that the PI is involved with including the ACS-project SEED program. The third component to the CAREER educational plan is to enhance the instructional aspects of the physical chemistry lecture and laboratory courses by including more instruction and experimental understanding of macromolecules.

这个CAREER奖涉及树枝状聚合物的超快速光谱研究。 最初，飞秒时间分辨测量将进行上转换设置均匀和不均匀的树枝状聚合物系统，以调查的相干性的激发。 几种新型树枝状聚合物系统的长辐射寿命也将通过时间相关单光子计数测量来测量。 这些初步研究还将确定其他发光应用的上级候选产品。 在各向异性测量的第二阶段，为了探测有机树枝状大分子中能量迁移过程的快速动力学。 为了更定量地测量均匀线宽以及具有强相互作用的树枝状聚合物系统中的退相动力学，他将进行三次脉冲光子回波实验。 有了这些信息，可以进行各种激子理论预测的定量比较。 这项研究将有助于回答一个重要的问题，不仅涉及有机树枝状大分子，但也涉及任何分支（分形）分子几何的激发。 我们如何描述强相互作用的支化发色团的相干性质的问题，将对材料科学、光物理学和技术社区产生重大影响。CAREER教育计划的重点是大分子的物理学和表征。 第一部分是让本科生接触到与大分子物理性质有关的工业研究和发展的真实的世界。 第二，PI将把这些项目整合到更大的群体互动中。 这将包括底特律地铁公立学区的本科生和较年轻的高中生，这是一个过去在科学领域代表性不足的地区。 这将与PI参与的正在进行的项目（包括ACS项目SEED项目）一起完成。 职业教育计划的第三个组成部分是通过增加对大分子的教学和实验理解来加强物理化学讲座和实验室课程的教学方面。