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Structural and Functional Diversity in Well-Defined Graphene Nanostructures

明确的石墨烯纳米结构的结构和功能多样性

基本信息

批准号：
1708210
负责人：
Terry Tilley
金额：
$ 42万
依托单位：
University of California-Berkeley
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1708210&HistoricalAwards=false
关键词：
Structural Functional Diversity Well Defined

项目摘要

This award is funded by the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry. Professor T. Don Tilley of the University of California Berkeley is supported to develop a general approach for the synthesis of structurally well-defined and functionally diverse graphene nanostructures. The sought-after graphene nanostructures are carefully designed with an eye for novel or enhanced properties and future applications. The synthetic methods being developed target carbon-carbon bond formations, which are central to the advancement of polymer, materials, and medicinal chemistry. Graphene's extraordinary properties have generated considerable interest in this material and its substructures for many applications, including molecular electronics, catalysis, and sensing. However, progress in this area has been severely hindered by a lack of reliable synthetic methods that allow control over graphene's properties. The project provides young scientists with a broad overview of critical issues in science and technology as well as extensive technical skills in chemical synthesis, X-ray crystallography, electrochemistry, computational chemistry, and a range of spectroscopic techniques. The PI and the students involved in this project organize, lead, and participate in outreach activities, including hosting local high school summer students and teaching basic scientific principles through interactive lessons at nearby elementary schools. The construction and elaboration of graphene nanostructures using organic chemistry promises a much higher level of control over properties than that offered by top-down methods. The synthetic manipulation of electronic properties for graphene-based materials, by generation of structures with well-defined dimensionalities, edge structures, and dopants, is challenging given the inherent difficulty associated with fusion of many aromatic rings. In this project, Professor T. Don Tilley and coworkers at UC Berkeley are developing a general, organometallic approach to address this ring-fusion challenge, with a focus on [2+2+n] cycloadditions of alkynes and/or nitriles. This chemistry is being used to target several novel classes of graphene nanostructures and related large polycyclic aromatic hydrocarbons, and all syntheses are driven by the pursuit of novel or enhanced properties. Electronic and optical properties are firmly established at the molecular level using various absorption and emission spectroscopies and electrochemical methods. As appropriate, these properties are then probed at the supramolecular, monolayer, and/or solid-state levels. An important aspect to this work is the use of advanced physical methods in the characterization of electronic properties, and their relationship to structure.

该奖项由化学部的高分子，超分子和纳米化学计划资助。 T教授加州伯克利大学的Don蒂利得到支持，开发了一种合成结构明确且功能多样的石墨烯纳米结构的通用方法。广受欢迎的石墨烯纳米结构经过精心设计，着眼于新颖或增强的性能和未来的应用。正在开发的合成方法的目标是碳-碳键的形成，这是聚合物，材料和药物化学进步的核心。石墨烯的非凡特性引起了人们对这种材料及其子结构的极大兴趣，这些子结构可用于许多应用，包括分子电子学、催化和传感。然而，由于缺乏可靠的合成方法来控制石墨烯的性质，这一领域的进展受到了严重阻碍。该项目为年轻科学家提供了科学和技术关键问题的广泛概述，以及化学合成，X射线晶体学，电化学，计算化学和一系列光谱技术方面的广泛技术技能。PI和参与该项目的学生组织，领导和参与外展活动，包括接待当地高中暑期学生，并通过在附近小学的互动课程教授基本科学原理。使用有机化学的石墨烯纳米结构的构建和精细化承诺比自上而下的方法提供更高水平的性能控制。考虑到与许多芳环的融合相关的固有困难，通过生成具有明确定义的维度、边缘结构和掺杂剂的结构来合成操纵石墨烯基材料的电子性质是具有挑战性的。在这个项目中，T.加州大学伯克利分校的Don蒂利和同事正在开发一种通用的有机金属方法来解决这种环融合挑战，重点是炔和/或腈的[2+2+n]环加成。这种化学方法正被用于靶向几种新型的石墨烯纳米结构和相关的大型多环芳烃，所有的合成都是由追求新的或增强的性能驱动的。电子和光学性质是牢固地建立在分子水平上使用各种吸收和发射光谱和电化学方法。在适当的情况下，这些属性，然后探测在超分子，单层，和/或固态水平。这项工作的一个重要方面是使用先进的物理方法来表征电子特性及其与结构的关系。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Titanocene-Mediated Dinitrile Coupling: A Divergent Route to Nitrogen-Containing Polycyclic Aromatic Hydrocarbons

茂钛介导的二腈偶联：制备含氮多环芳烃的不同途径

DOI：
10.1021/jacs.7b13823
发表时间：
2018
期刊：
Journal of the American Chemical Society
影响因子：
15
作者：
Kiel, Gavin R.;Samkian, Adrian E.;Nicolay, Amélie;Witzke, Ryan J.;Tilley, T. Don
通讯作者：
Tilley, T. Don

Shape-Selective Synthesis of Pentacene Macrocycles and the Effect of Geometry on Singlet Fission

DOI：
10.1021/jacs.0c09941
发表时间：
2020-11-25
期刊：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
影响因子：
15
作者：
Bergman, Harrison M.;Kiel, Gavin R.;Tilley, T. Don
通讯作者：
Tilley, T. Don

Elucidation of Diverse Solid‐State Packing in a Family of Electron‐Deficient Expanded Helicenes via Microcrystal Electron Diffraction (MicroED)**

通过微晶电子衍射 (MicroED) 阐明电子族缺陷膨胀螺旋烯中的多种固态堆积**

DOI：
10.1002/anie.202012213
发表时间：
2020
期刊：
Angewandte Chemie International Edition
影响因子：
0
作者：
Samkian, Adrian E.;Kiel, Gavin R.;Jones, Christopher G.;Bergman, Harrison M.;Oktawiec, Julia;Nelson, Hosea M.;Tilley, T. Don
通讯作者：
Tilley, T. Don

Expanded Helicenes: A General Synthetic Strategy and Remarkable Supramolecular and Solid-State Behavior