Molecular-Level Studies of Structure and Photophysics in Conjugated Polymers

共轭聚合物结构和光物理的分子水平研究

• 批准号: 0350383
• 负责人: Michael Winokur
• 金额: $ 15.8万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0350383&HistoricalAwards=false
• 关键词: Molecular; Level; Studies; Structure; Photophysics

Conjugated polymers represent a class of materials that incorporate the physical attributesof conventional polymers and, simultaneously, electronic and optical properties more often associated with classic inorganic semi-conductors. In terms of science and technology as a whole, these polymers are becoming a mainstream building block for developing new device technologies. This evolutionary progress is based on widespread advancements in materials synthesis, processing and in the science and technology of their applications. At the molecular level they remain highly complex materials with numerous long-standing questions and, given the desire for molecular level engineering, a multitude of newer issuesconcerning subtle structure/property relationships. Understanding and controlling the three-dimensional organization at the shortest length scales (0.1-10 nm) remains a central issue for defining their potential in real world applications and identifying the ever present limitations.This initiative represents a focused set of research projects that will enhance the fundamentalunderstanding of structure, structural phase behavior in conjugated polymers and, additionally, the impact that structure has on technologically important photophysical properties. A combination of direct diffraction studies, molecular modeling and structure refinement techniques constitute the core of these efforts and these will be used for clarifying issues pertaining to molecular-level structure in the most highly ordered materials. Even in the best cases these conjugated polymers often include multiple conformational sequences along the skeletal backbone. Therefore a proper accounting of these structure/property relationshipsnecessitates a more integrated approach combining other techniques (including photoabsorption, photoluminescence and Raman spectroscopy). Novel polymer processing techniques and extensive use of in situ methodologies will also be exploited.On a broader level this research includes activities which meld multiple techniques and interdisciplinary collaborations in order to congently and comprehensively address central issues of local conjugated polymer structure and its impact on salient photophysics. An important component of this work is portability and accessibility to the science community. This will be accomplished through a set of selected new directions. To the fullest extent possible, all new experimental developments will rely on web-accessible instrumentationinterfaces and standardized hierarchal data formats. These attributes will provide ready access to students both at the graduate and undergraduate level. Ultimately the knowledge and techniques developed though the course of this research will provide very basic and accurate answers to questions of structure, its evolution and the direct relationship to photophysics within these diverse materials.

共轭聚合物代表了一类材料，它结合了传统聚合物的物理属性，同时还具有通常与经典无机半导体相关的电子和光学特性。就整个科学技术而言，这些聚合物正在成为开发新设备技术的主流构建模块。这种进化进步基于材料合成、加工及其应用科学技术的广泛进步。 在分子水平上，它们仍然是高度复杂的材料，存在许多长期存在的问题，并且考虑到对分子水平工程的渴望，存在许多关于微妙结构/性质关系的新问题。理解和控制最短长度尺度（0.1-10 nm）的三维组织仍然是确定其在现实世界应用中的潜力并确定目前存在的局限性的核心问题。该倡议代表了一组重点研究项目，将增强对结构、共轭聚合物的结构相行为以及结构对技术上重要的光物理性质的影响的基本理解。直接衍射研究、分子建模和结构细化技术的结合构成了这些努力的核心，这些技术将用于澄清与最高度有序材料中的分子级结构有关的问题。即使在最好的情况下，这些共轭聚合物通常沿着骨架包含多个构象序列。因此，对这些结构/性质关系的正确解释需要结合其他技术（包括光吸收、光致发光和拉曼光谱）的更综合的方法。新颖的聚合物加工技术和原位方法的广泛使用也将得到开发。在更广泛的层面上，这项研究包括融合多种技术和跨学科合作的活动，以便一致、全面地解决局部共轭聚合物结构的核心问题及其对突出光物理的影响。这项工作的一个重要组成部分是科学界的可移植性和可访问性。 这将通过一系列选定的新方向来实现。在最大程度上，所有新的实验开发都将依赖于可通过网络访问的仪器接口和标准化的分层数据格式。这些属性将为研究生和本科生提供方便的访问机会。最终，通过本研究过程开发的知识和技术将为这些不同材料中的结构、其演化以及与光物理学的直接关系等问题提供非常基本和准确的答案。