ORGANICS: Exploring Charge Transport in Conjugated Organic Materials: A 2D Oligomer Approach

本研究的目的是表征分子间（即链-链）相互作用对有机材料中离域载流子性质的影响，通过开发共轭低聚物。低聚物的堆叠几何结构在溶液和气相中持续存在，并且合成化学，电化学和光谱（UV-vis-NIR，荧光，ESR， UPS）的结合将使我们能够探索分子和聚合物链的电子结构演变为3d材料。拟议活动的智力优势包括：(i)加强对链间相互作用对共轭有机材料电子性质的影响的理解，（ii）通过控制链间几何形状增强场效应晶体管迁移率的新型共轭低聚物，以及（iii）新的光谱数据，这将有助于开发新的基于量子的计算方法。拟议的研究产生的更广泛的影响包括在高度跨学科的研究环境中培训研究生各种技术的机会，以及通过与纳丁·格鲁恩博士（亚利桑那大学）和Bredas教授和Kippelen教授（佐治亚理工学院）的拟议合作。乔治亚理工学院和PI在培养少数族裔毕业生方面有着良好的记录。研究人员将从乔治亚理工学院化学与生物化学学院的不同学生群体中招募。

The objective of this research is to characterize the effect of intermolecular (i.e., chain-chain) interactions on the nature of delocalized charge carriers in organic materials by development of cofacially-held conjugated oligomers. The stacked geometry of the oligomers persists in solution and in the gas phase, and a combination of synthetic chemistry, electrochemistry, and spectroscopies (UV-vis-NIR, fluorescence, ESR, UPS) will allow us to explore the evolution of the electronic structure of molecules and polymer chains into that of 3-D materials.Intellectual merits of the proposed activity include: (i) an enhanced understanding of the influence of interchain interactions on the electronic properties of conjugated organic materials, (ii) new conjugated oligomers with enhanced mobility in field effect transistors by virtue of control over interchain geometry, and (iii) new spectroscopic data which will aid in the development of new quantum-based computational methods. The broader impacts resulting from the proposed study include opportunities for training of graduate students in a variety of techniques in a highly interdisciplinary research environment, as well as through proposed collaborations with Dr. Nadine Gruhn (University of Arizona), and Professors Bredas and Kippelen (Georgia Tech). Georgia Tech and the PI 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.