Polyphilic Fluoroalkyl-Substituted Polythiophenes

新型含氟烷基取代聚噻吩类化合物的多亲性为制备高度有序和定向的共轭有机材料提供了手段。可调的电子性能、溶解度和半氟材料的超分子组装相结合，使我们能够解决电子设备中使用的共轭聚合物设计中的一些标准。这项研究将建立在溶液、液晶中间相和固相阶段中形成组装体的结构-性质关系。此外，对亲水性聚合物的研究将有助于深入了解控制分子在表面取向的方法的发展，这是一个目前知之甚少的问题，但在开发用于器件的共轭有机材料方面具有重要意义。我们还将探索由吸电子的全氟烷基团取代的共轭聚合物还原形成的聚阴离子的性质(即离域、迁移率)，以及沟道电导的势。最后，将研究含氟烷基取代的共轭聚合物在超临界二氧化碳中的溶解度，以便在“绿色溶剂”中处理这些具有重要技术价值的材料。所提出的研究将产生新的设计主题，可应用于其他共轭聚合物，这是发展新的电子、光学和电光技术的一个强烈兴趣的领域。它为集成到原型器件中提供了新的材料，并将为有序和定向材料的发展提供新的物理见解。这项研究为研究生和本科生提供了在各种技术和领域进行培训的绝佳机会：有机合成和表征、聚合化学、材料表征和表征器件制造。这些学生将受益于佐治亚理工学院校区的卓越设施和跨学科环境，以及与包正德博士拟议的合作。佐治亚理工学院和PI的团体在培训来自代表不足的少数族裔群体的毕业生方面都有很好的记录。研究人员将从佐治亚理工学院化学和生物化学学院的不同学生群体中招募到这个项目中。

The polyphilicity of new fluoroalkyl-substituted polythiophenes provides the means to prepare highly ordered and oriented conjugated organic materials. The combination oftunable electronic properties, solubility, and supramolecular assembly ofsemifluorinated materials allows us to address a number of criteria in the design of conjugated polymersfor use in electronic devices. The study will establish structure-property relationships forthe formation of assemblies in solution, in liquid crystalline mesophases and in the solidstage. In addition, the study of polyphilic polymers will provide insight into developmentof methods to attain control of the orientation of molecules at surfaces, a subject which ispoorly understood at present but one of great importance in the development ofconjugated organic materials for use in devices. We will also explore the nature of thepolyanions (i.e., delocalization, mobility) formed by reduction of conjugated polymerssubstituted by electron withdrawing perfluoroalkyl groups, and the potential forn-channel conduction. Finally, the solubility of fluoroalkyl-substituted conjugated polymersin supercritical carbon dioxide will be investigated to allow for processing of these technologically important materials in a "green solvent".The proposed study will lead to new design motifs which may be applied to other conjugated polymers, a field of intense interest in the development of new electronic, optical and electrooptical technologies. It provides new materials for incorporation into prototypical devices, and will provide new physical insights into the development of ordered and oriented materials. The study provides exceptional opportunities for training of graduate and undergraduate students in a variety of techniques and fields: organic synthesis and characterization, polymerization chemistry, characterization of materials, and device fabrication of characterization. These students will benefit from outstanding facilities and the interdisciplinary environment present on the Georgia Tech campus, as well as the proposed collaboration with Dr. Z. Bao. Both Georgia Tech and the PI's group have a strong record of training graduates from underrepresented minority groups. Researchers will be recruited to this project from the diverse student population present in the School of Chemistry and Biochemistry at Georgia Tech.