Coupled Ionic-Electronic-Structural Dynamics in Organic Mixed Conductors

有机混合导体中的耦合离子电子结构动力学

• 批准号: 2304613
• 负责人: Connor Bischak
• 金额: $ 46.07万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-01 至 2026-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2304613&HistoricalAwards=false
• 关键词: Coupled; Ionic; Electronic; Structural; Dynamics

With the support of the Macromolecular, Supramolecular and Nanochemistry program in the Division of Chemistry, Connor G. Bischak of the University of Utah is elucidating the relationship between electronic transport, ion motion, and structural dynamics in conjugated polymers that operate as organic mixed ionic-electronic conductors (OMIECs). OMIECs are soft polymeric semiconductors which can conduct both electronic and ionic charges. This unique ability makes them particularly suitable for a variety of applications of relevance to next-generation bioelectronic, optoelectronic and energy storage devices. However, for many of these applications, it is currently difficult to choose a combination of polymer molecular structure, polymer processing conditions, and electrolyte to achieve a specific performance metric. This project will fill these knowledge gaps by exploiting the high spatial resolution and chemical specificity of novel scanning probe imaging approaches, as well as a complementary suite of traditional and novel in situ techniques. Fundamental correlations established as a result of this work have the potential to help guide synthetic chemists towards synthesizing the next generation of OMIEC conjugated polymers. The interdisciplinary nature of this research will provide strong training and professional development opportunities for high school, undergraduate and graduate students. The project will additionally support an outreach effort to supply local high school chemistry classrooms with affordable 3D-printed spectrometers to learn about light-matter interactions, similar to those that are used to interrogate OMIEC polymers.This research will focus on investigating organic mixed ionic-electronic conductors (OMIECs) to uncover relationships between ion motion, electronic transport, and structural dynamics. Poly(thiophene)s with various backbones comprised of hydrocarbons, oligo (ethylene glycol)s, or carbonyl functionalities will be the focal points, in part because they are currently the highest performing OMIEC materials. In the first specific aim, reversible and irreversible structural dynamics will be investigated using blends of semicrystalline and amorphous polymers to tune the crystallinity and measure ion injection kinetics as a function of crystalline to amorphous polymer ratios. The second aim will extend studies to ion dependent effects. Finally, the impacts of heterogeneous polymer structure will be addressed through correlative nanoscale imaging that will be used to answer basic questions about the doping process and structural dynamics. The combined efforts have the potential to afford new insights into chemical design elements that enable more effective conductivity. This research aims to address critical knowledge gaps in the field with the goal of enabling design of optimal ionic and electronic conductivity in such systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在化学系高分子、超分子和纳米化学项目的支持下，犹他大学的 Connor G. Bischak 正在阐明共轭聚合物中电子传输、离子运动和结构动力学之间的关系，这些聚合物作为有机混合离子-电子导体（OMIEC）。 OMIEC 是软聚合物半导体，可以传导电子和离子电荷。 这种独特的能力使它们特别适合与下一代生物电子、光电和能量存储设备相关的各种应用。 然而，对于许多此类应用，目前很难选择聚合物分子结构、聚合物加工条件和电解质的组合来实现特定的性能指标。 该项目将通过利用新型扫描探针成像方法的高空间分辨率和化学特异性以及传统和新型原位技术的补充套件来填补这些知识空白。 这项工作所建立的基本关联有可能帮助指导合成化学家合成下一代 OMIEC 共轭聚合物。 这项研究的跨学科性质将为高中生、本科生和研究生提供强有力的培训和专业发展机会。 该项目还将支持一项外展工作，为当地高中化学教室提供价格实惠的 3D 打印光谱仪，以了解光与物质的相互作用，类似于用于询问 OMIEC 聚合物的光谱仪。这项研究将重点研究有机混合离子-电子导体（OMIEC）来揭示离子运动、电子传输和结构动力学之间的关系。具有由碳氢化合物、低聚乙二醇或羰基官能团组成的各种主链的聚噻吩将成为焦点，部分原因是它们是目前性能最高的 OMIEC 材料。 在第一个具体目标中，将使用半结晶和无定形聚合物的混合物来研究可逆和不可逆结构动力学，以调节结晶度并测量离子注入动力学作为结晶与无定形聚合物比率的函数。 第二个目标是将研究扩展到离子依赖性效应。 最后，异质聚合物结构的影响将通过相关纳米级成像来解决，该成像将用于回答有关掺杂过程和结构动力学的基本问题。 共同努力有可能为化学设计元素提供新的见解，从而实现更有效的导电性。这项研究旨在解决该领域的关键知识差距，目标是在此类系统中实现最佳离子和电子电导率的设计。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优势和更广泛的影响进行评估，被认为值得支持审查标准。