权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Preparation and Development of Metal-Isocyanide Framework Materials

金属异氰化物骨架材料的制备与开发

基本信息

批准号：
2106713
负责人：
Joshua Figueroa
金额：
$ 54.05万
依托单位：
University of California-San Diego
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-06-01 至 2024-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2106713&HistoricalAwards=false
关键词：
Preparation Development Metal Isocyanide Framework

项目摘要

Non-technical AbstractWith this project, supported by the Solid State and Materials Chemistry Program in the Division of Materials Research, Professor Joshua S. Figueroa and his research team at the University of California, San Diego develop a new class of metal/organic hybrid solid-state materials. There is significant current interest in the development of solid-state materials with advanced function and properties for a range of technological and industrial applications, including chemical separations, chemical storage, energy harvesting and chemical catalysis. Among such materials, Metal-Organic Frameworks (MOFs), which are a type of hybrid inorganic/organic solid-state material, are a standout. The reason for this is because MOFs can be prepared with diverse structures, for example with different inorganic portions of the material, and it is relatively easy to tune the organic component for specific applications. While the synthetic and materials chemistry aspects of MOFs have significantly advanced over the past two decades, a common paradigm is followed for their preparation. This involves the interaction of oxidized metal centers with anionic organic linker groups. From a fundamental perspective, this particular constitution limits the chemical and physical properties of the materials, especially from the perspective of mediating chemical or adsorptive processes that rely on the presence of metal centers with high electron counts. In this respect, this project establishes a class of neutral linker groups for the routine and reliable incorporation of electron-rich metal centers into network materials. The scientific work of this award is augmented by a significant effort to broaden participation of junior- and community-college transfer student participation in materials science research at the University of California, San Diego, as well as to introduce local San Diego Area high school students to modern aspects of materials science research.Technical AbstractWith support from the Solid State and Materials Chemistry Program in the Division of Materials Research, Professor Joshua S. Figueroa of the University of California, San Diego explores the synthesis and properties of isocyanide coordination networks featuring low-valent metal centers as secondary building units (SBUs). Organoisocyanides are well established to form robust metal-ligand linkages via strong sigma-donation and highly efficient pi-backbonding interactions. This electronic duality has also been long recognized to stabilize low-valent metal centers. Seeking to transport these discrete molecular properties into a network-materials context, synthetic investigations are undertaken to prepare porous, three-dimensional solid-state networks featuring low-valent transition metal nodes using multi-topic isocyanide linkers. Furthermore, in an effort to simultaneously impart coordinative saturation on the metal nodes of these materials, the m-terphenyl isocyanide ligand topology are a predominant feature of these studies. Newly prepared isocyanide coordination networks are investigated in the context of their fundamental materials properties. An emphasis is placed on chemiabsorptive properties of these materials as function of the low-valent metal center incorporation. The experimental work undertaken as part of this award is complemented by an educational program targeting the early inclusion of junior/community college transfer students at the University of California, San Diego in materials science research. The goal of these efforts is to increase participation of a broader student demographic in STEM research and advanced training. Lastly, to augment training experiences for students working on this project, outreach to local area high schools in the form of curriculum augmentation is also a major component of the project.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.

非技术摘要在材料研究部固态和材料化学计划的支持下，加州大学圣地亚哥分校的Joshua S.Figueroa教授和他的研究团队开发了一种新型的金属/有机混合固态材料。目前，人们对开发具有先进功能和性能的固态材料产生了浓厚的兴趣，这些材料可用于一系列技术和工业应用，包括化学分离、化学储存、能量收集和化学催化。在这类材料中，金属-有机骨架(MOF)是一种无机/有机混合固态材料，是其中的佼佼者。这样做的原因是因为MOF可以用不同的结构制备，例如用材料的不同无机部分制备，并且针对特定应用调整有机成分相对容易。虽然MOF的合成和材料化学方面在过去20年中取得了显著进展，但它们的制备遵循了一个共同的范式。这涉及氧化金属中心与阴离子有机连接基团的相互作用。从根本上讲，这种特殊的结构限制了材料的化学和物理性质，特别是从中介化学或吸附过程的角度来看，这些过程依赖于具有高电子计数的金属中心的存在。在这方面，本项目建立了一类中性连接基团，用于将富电子金属中心常规和可靠地结合到网络材料中。加州大学圣地亚哥分校的乔舒亚·S·菲格罗亚教授在材料研究部固态和材料化学项目的支持下，探索了异氰化物配位网络的合成和性质，并向圣地亚哥地区的当地高中生介绍了材料科学研究的现代方面。有机异氰酸酯通过强烈的Sigma-给体作用和高效的pi-Back键合作用，形成了牢固的金属-配体键。这种电子的二元性也早已被认为可以稳定低价金属中心。为了将这些离散的分子性质转移到网络材料的背景下，人们进行了合成研究，以制备具有低价过渡金属节点的多孔三维固态网络，使用多主题异氰酸酯连接物。此外，为了同时在这些材料的金属节点上赋予配位饱和度，间三苯基异氰酸酯配体拓扑结构是这些研究的主要特征。对新制备的异氰酸酯配位网络的基本材料性质进行了研究。重点强调了这些材料的化学吸收性能作为低价金属中心掺入的功能。作为该奖项的一部分，开展的实验工作得到了一个教育项目的补充，该项目旨在尽早将加州大学圣地亚哥分校的初级/社区学院转学学生纳入材料科学研究。这些努力的目标是增加更广泛的学生群体对STEM研究和高级培训的参与。最后，为了增加参与这个项目的学生的培训经验，以课程扩充的形式延伸到当地高中也是该项目的一个主要组成部分。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审查标准进行评估，被认为值得支持。