New Strategy for Synthesis of Atomically-Precise Graphene Nanoribbons

合成原子级精确石墨烯纳米带的新策略

基本信息

批准号：
2002912
负责人：
Guangbin Dong
金额：
$ 42万
依托单位：
University of Chicago
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-01 至 2023-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002912&HistoricalAwards=false
关键词：
New Strategy Synthesis Atomically Precise

项目摘要

With this award, the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry is supporting Professor Guangbin Dong at the University of Chicago to develop new approaches for preparing atomically-precise, water-soluble graphene nanoribbons. These nanoribbons are strips (50-100 thousand times thinner than a human hair) of graphene: a sheet of carbon atoms arranged in a rigid structure that resembles chicken wire. Graphene nanoribbons come in two different structural forms, armchair and zigzag. Armchair graphene nanoribbons have emerged as attractive organic materials for potential applications in high-speed, light-weight and flexible electronic devices. Zigzag graphene nanoribbons represent promising materials for developing efficient spintronic (spin-electronic) devices. To date, the efficient and practical synthesis of water-soluble and processable graphene has not been possible. The Dong group is combining physical organic chemistry knowledge with advanced tools of transition-metal catalysis to overcome the synthetic challenges and the processability problem. The development of scalable synthetic approaches for the production of pure forms of armchair and zigzag nanoribbons opens the way for novel applications of these materials in nanoelectronics, spintronic and quantum computing devices. During the course of this research, the Dong group is actively participating in the Leadership Alliance Summer Research Program to encourage diverse groups of minority undergraduate students to explore careers in science and engineering. The Dong group is also actively engaged in the University of Chicago's graduate student “ChiS&E” program providing educational outreach activities to students from local public middle schools.This research project seeks to offer efficient and scalable synthetic approaches for preparing atomically-precise, water-soluble armchair and zigzag graphene nanoribbons (aGNRs and zGNRs) that could be ultimately used in high performance electronic and spintronic devices. The objectives are to realize solution-phase synthesis of aGNRs and zGNRs with precisely installed piperazine side chains. The key synthetic challenge is to exploit the newly developed palladium/norbornene (Pd/NBE) catalysis to prepare these unique monomers for GNR synthesis. Compared to the existing approaches of GNR synthesis, the merits of the new strategies include: monomers that are prepared in a streamlined manner from commercially available chemicals; redundant bulky side chains that are avoided for better imaging of the material edge structures; and products that are expected to exhibit high solubility and processability in aqueous solutions. The successful implementation of the research may address two long-standing challenges: synthesis of water-soluble GNRs and solution-phase preparation of zGNRs, which are critical factors for solution processability of these materials and the development of graphene-based spintronic devices. The research facilitates the physical and theoretical studies of these intriguing materials, as many of those aGNRs and zGNRs may be made for the first time in the lab and then used to validate or examine various theoretical models and hypotheses proposed previously by physicists and physical chemists. The knowledge obtained from these investigations may improve our understanding of these graphene-like one-dimensional polymers. This, in turn, may further inspire and stimulate the development of other new conjugated organic semiconducting materials.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.

凭借该奖项，化学系的高分子、超分子和纳米化学项目正在支持芝加哥大学的董广斌教授开发制备原子级精确的水溶性石墨烯纳米带的新方法。这些纳米带是条状的（50-100）。石墨烯（比人的头发丝细千倍）：采用类似于石墨烯纳米带的刚性结构排列的碳原子片。扶手椅式和锯齿形两种不同的结构形式已成为有吸引力的有机材料，在高速、轻质和柔性电子器件中具有潜在的应用前景。迄今为止，高效、实用地合成水溶性且可加工的石墨烯尚未成为可能，该团队正在将物理有机化学知识与先进的过渡金属催化工具相结合来克服这一问题。合成挑战和可加工性问题的开发用于生产纯形式的扶手椅和锯齿形纳米带，为这些材料在纳米电子学、自旋电子学和量子计算设备中的新应用开辟了道路。董小组积极参与领导力联盟夏季研究计划，以鼓励不同群体的少数族裔本科生探索科学和工程领域的职业生涯。董小组还积极参与芝加哥大学的研究生。 “ChiS&E”计划为当地公立中学的学生提供教育推广活动。该研究项目旨在提供高效且可扩展的合成方法，用于制备原子级精确的水溶性扶手椅和锯齿形石墨烯纳米带（aGNR 和 zGNR），最终可能其目标是实现具有精确安装的哌嗪侧链的aGNR和zGNR的溶液相合成。面临的挑战是利用新开发的钯/降冰片烯（Pd/NBE）催化来制备这些独特的GNR合成单体，与现有的GNR合成方法相比，新策略的优点包括：以简化的方式制备单体。来自市售化学品；避免了多余的大侧链，以更好地成像材料边缘结构以及预期在水溶液中表现出高溶解度和可加工性的产品。解决了两个长期挑战：水溶性 GNR 的合成和 zGNR 的溶液相制备，这是这些材料的溶液加工性和基于石墨烯的自旋电子器件开发的关键因素。该研究促进了这些材料的物理和理论研究。这些材料很有趣，因为许多 aGNR 和 zGNR 可能是首次在实验室中制造出来，然后用于验证或检查物理学家和物理化学家先前提出的各种理论模型和假设。这些研究可能会提高我们对这些类石墨烯一维聚合物的理解，这反过来可能会进一步激发和刺激其他新型共轭有机半导体材料的开发。该奖项反映了 NSF 的法定使命，并被认为值得通过支持。使用基金会的智力价值和更广泛的影响审查标准进行评估。

项目成果

期刊论文数量（2）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Multicomponent Polymerization for π‐Conjugated Polymers

共轭聚合物的多组分聚合

DOI：
10.1002/marc.202000646
发表时间：
2020-12
期刊：
Macromolecular Rapid Communications
影响因子：
4.6
作者：
Yoon, Ki‐Young;Dong, Guangbin
通讯作者：
Dong, Guangbin

Backbone Engineering of Monodisperse Conjugated Polymers via Integrated Iterative Binomial Synthesis

通过集成迭代二项式合成进行单分散共轭聚合物的骨架工程

DOI：
10.1021/jacs.3c08143
发表时间：
2023-08-30
期刊：
Journal of the American Chemical Society
影响因子：
15
作者：
Yin, Jiangliang;Choi, Shinyoung;Pyle, Daniel;Guest, Jeffrey R.;Dong, Guangbin
通讯作者：
Dong, Guangbin