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Organometallic Chemistry of Periodic pi-Electron Surfaces: Carbon Nanotubes and Graphene

周期性π电子表面的有机金属化学：碳纳米管和石墨烯

基本信息

批准号：
1305724
负责人：
Elena Bekyarova
金额：
$ 54万
依托单位：
University of California-Riverside
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2013
资助国家：
美国
起止时间：
2013-09-01 至 2018-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1305724&HistoricalAwards=false
关键词：
Organometallic Chemistry Periodic pi Electron

项目摘要

TECHNICAL SUMMARY:This project, supported by the Solid State and Materials Chemistry Program, involves preparation of a new class of graphitic materials in which the surfaces are functionalized with transition metals, thereby allowing the formation of atomic scale interconnects that consist of bis-hexahapto-metal-bonds between the benzenoid ring systems; this approach is anticipated to provide a method to increase the dimensionality of the electronic structure of the 1-D carbon nanotubes and the 2-D graphene sheets. Preliminary experiments show that chromium complexes are accessible by a wide range of preparative methods, which include solution phase functionalization with chromium carbonyl precursors, solid state thermal reactions under pressure beginning with mono-hexahapto complexes and gas phase metal vapor synthesis using electron beam physical vapor deposition (e-beam). All of these materials show evidence of a change in the electrical conductivities of the starting graphitic structures on organometallic functionalization and it is the purpose of this proposal to broaden the fundamental understanding of the interaction between metals and graphene surfaces and to refine the synthesis and physical characterization of the materials. Based on a frontier molecular orbital analysis of the electronic structure of graphene at the Dirac point, graphene is identified as an excellent ligand in coordination complexes and it is apparent that a wide variety of organometallic intercalation compounds can be prepared. Thus the goal of the proposed research is to develop a class of novel transition metal-graphene materials that exhibit unique electronic properties and to lay the foundation for electronic interconnects between graphitic surfaces at the atomic level. The new materials may be of interest as the active constituent in electronic, opto-electronic and spintronic devices. NON-TECHNICAL SUMMARY:This project will lead to a new class of carbon nanotube and graphene frameworks that are held together by covalent, rather than ionic bonding. The proposed materials are expected to have novel catalytic, electronic and magnetic properties; a number of the known charge transfer graphite compounds exhibit superconductivity and such a possibility exists with the proposed organometallic compounds. The broader impact of this project will be most evident in the participation and training of students at the undergraduate and graduate level which will occur in a highly integrated, multidisciplinary program whose work is directed toward advancements in fundamental and technologically significant aspects of the chemical sciences. The students will be exposed to an extensive suite of modern research tools and will become familiar with the Center for Nanoscale Science and Engineering nanofabrication tools and analytical techniques. We have found that such training serves as an invaluable asset for students that are seeking entry into the electronics industry. Special effort will be devoted to attracting women and minorities into the research program through the California Alliance for Minority Participation (CAMP), the Summer Bridge Research Program and CNAS Dean Summer Internships. This project is supported by the Solid State and Materials Chemistry Program.

技术摘要：该项目由固态和材料化学计划支持，涉及制备一类新的石墨材料，其中表面用过渡金属官能化，从而允许形成原子尺度的互连，该互连由苯型环系统之间的bis-hexahapto-metal-bonds组成;这种方法预计将提供一种方法来增加1-D碳纳米管和2-D石墨烯片的电子结构的维度。初步的实验表明，铬配合物是通过广泛的制备方法，其中包括溶液相官能化与羰基铬前体，固态热反应在压力下开始与mono-hexahapto配合物和气相金属气相合成，使用电子束物理气相沉积（电子束）。所有这些材料都显示出有机金属官能化的起始石墨结构的电导率变化的证据，并且该提议的目的是拓宽对金属和石墨烯表面之间的相互作用的基本理解，并改进材料的合成和物理表征。基于对石墨烯在Dirac点处的电子结构的前线分子轨道分析，石墨烯被确定为配位络合物中的优良配体，并且很明显，可以制备各种各样的有机金属插层化合物。因此，拟议研究的目标是开发一类具有独特电子特性的新型过渡金属-石墨烯材料，并为原子水平上石墨表面之间的电子互连奠定基础。这些新材料可能作为电子、光电子和自旋电子器件的活性组分而引起人们的兴趣。非技术总结：该项目将导致一类新的碳纳米管和石墨烯框架，它们通过共价键而不是离子键结合在一起。所提出的材料预计将具有新的催化，电子和磁性;一些已知的电荷转移石墨化合物表现出超导性，这种可能性存在于所提出的有机金属化合物。该项目的更广泛的影响将在本科生和研究生水平的学生的参与和培训中最为明显，这将发生在一个高度集成的多学科计划中，其工作是针对化学科学的基础和技术重要方面的进步。学生将接触到一套广泛的现代研究工具，并将熟悉纳米科学与工程中心的纳米纤维工具和分析技术。我们发现，这种培训是寻求进入电子行业的学生的宝贵资产。将通过加州少数民族参与联盟（CAMP）、夏桥研究计划和CNAS院长暑期实习，特别努力吸引妇女和少数民族参与研究计划。该项目由固态和材料化学计划支持。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Protection of Molecular Microcrystals by Encapsulation under Single-Layer Graphene

DOI：
10.1021/acsomega.8b00872
发表时间：
2018-07-01
期刊：
ACS OMEGA
影响因子：
4.1
作者：
Li, Wangxiang;Tierce, Nathan T.;Bardeen, Christopher J.
通讯作者：
Bardeen, Christopher J.

Metals on Graphene and Carbon Nanotube Surfaces: From Mobile Atoms to Atomtronics to Bulk Metals to Clusters and Catalysts

DOI：
10.1021/cm4025809
发表时间：
2014-01-14
期刊：
CHEMISTRY OF MATERIALS
影响因子：
8.6
作者：
Sarkar, Santanu;Moser, Matthew L.;Haddon, Robert C.
通讯作者：
Haddon, Robert C.

Solution-phase synthesis of chromium-functionalized single-walled carbon nanotubes

DOI：
10.1016/j.matlet.2014.11.157
发表时间：
2015-03
期刊：
Materials Letters
影响因子：
3
作者：
I. Kalinina;Y. Al-Hadeethi;E. Bekyarova;Chao Zhao;Qingxiao Wang;Xixiang Zhang;Ali Al-Zahrani;Faisal Al-Agel;F. Al-Marzouki;R. Haddon
通讯作者：
I. Kalinina;Y. Al-Hadeethi;E. Bekyarova;Chao Zhao;Qingxiao Wang;Xixiang Zhang;Ali Al-Zahrani;Faisal Al-Agel;F. Al-Marzouki;R. Haddon

Organometallic chemistry of graphene: Photochemical complexation of graphene with group 6 transition metals