Optical Excitations and Applications in Novel Organic Macromolecular Aggregates

非技术概要：有机高分子材料在光学和电子领域的应用在过去十年中取得了很大的进展。然而，关于它们的基本光学性质仍然存在一些科学问题。有必要进行进一步的科学研究，这将使科学家能够定制聚合物的结构，以获得更好的光学和电子效果。在这个项目中，PI将用两种有机高分子材料进行实验。为了检验这两种有机聚合物的光学性质，将进行先进的专门激光光谱测量。这些激光实验将进行，以确定聚合物结构的变化如何影响其光学性质。最终，这些光学实验的结果将用于设计新的有机聚合物材料，以增强光学应用。本研究项目还将促进密歇根东南周边地区高中生的科学教育，并促进密歇根大学和其他不同背景的本科院校本科生的参与和培训。该研究项目的目标和影响之一将是确定特定的特性，从而改进聚合物材料的潜在光学应用，以及增加与聚合物领域相关的科学或工程专业学生的多样性。技术概述：有机共轭聚合物和大分子聚集体现在是许多电子和光学应用的有前途的候选者。为了进一步了解大分子材料的基本结构-功能关系，必须探索激发动力学。在提议的研究中，PI将研究新的有机聚合物和大分子阶梯型体系的光激发。时间分辨和非线性光学性质的测量将在这些材料中进行，以便为进一步设计优质材料提供新的结构-功能关系。将对这种新型大分子材料进行溶液和固态的测量。在溶液和固体薄膜中进行时间分辨荧光和瞬态吸收实验，探讨能量转移、电荷转移和激子扩散的影响。时间分辨测量结果将用于设计具有更好光学性能的新材料，用于非线性光学应用。本研究将促进高中生、本科生和研究生科学训练的进展。这项调查还将加强妇女和少数民族科学家在聚合物物理和材料科学领域的参与，开展与增加这一研究领域教员的多样性有关的活动。

NON-TECHNICAL SUMMARY:The use of organic polymeric materials for optical and electronic applications has shown great progress in the last decade. However, there are scientific questions which still remain regarding their fundamental optical properties. There is a need for further scientific investigations which will allow scientists to tailor the structures of polymers in order to achieve better optical and electronic effects. In this project the PI will carry out experiments with two types of organic polymeric materials. In order to examine the optical properties of these two types of organic polymers advanced specialized laser spectroscopic measurements will be carried out. These laser experiments will be conducted so as to determine how changes in the polymeric structure affect their optical properties. Ultimately, the results of these optical experiments will be utilized to design new organic polymeric materials for enhanced optical applications. This research project will also promote scientific education for high school students in the surrounding areas of southeast Michigan as well as facilitating the participation and training of undergraduate students from the University of Michigan and other undergraduate institutions with diverse backgrounds. Among the goals and impacts of this research project will be the identification of specific properties leading to improved polymeric materials for potential optical applications, as well as an increase in the diversity of students trained in science or engineering related to polymer areas.TECHNICAL SUMMARY :Organic conjugated polymers and macromolecular aggregates are now promising candidates for many electronic and optical applications. In order to further understand the fundamental structure-function relationships in macromolecular materials one must probe the dynamics of excitations. In the proposed studies the PI will investigate the optical excitations of new organic polymers and macromolecular ladder-type systems. Measurements of time-resolved and nonlinear optical properties will be carried out in these materials in order to provide new structure-function relationships to further design superior materials. Measurements in solution as well as in the solid state will be carried out on the new macromolecular materials. The effects of energy transfer, charge transfer and exciton diffusion will be probed with time-resolved fluorescence and transient absorption experiments in solution and in solid thin films. The results of the time-resolved measurements will be utilized to design new materials with better optical properties for nonlinear optical applications. This investigation will facilitate the progress in scientific training of high school students as well as undergraduate and graduate students. The investigation will also enhance the participation of women and minority scientists in the area of polymer physics and materials science with activities related to increasing the diversity of faculty in this area of research.