RUI: Two- and Three-Dimensional Coordination Polymers Self-Assembled from Platinum Group Metal Thiacrown Complexes

无机、生物无机和有机金属化学项目的芮奖支持田纳西大学查塔努加分校格雷格·格兰特教授的工作。本研究主要对过渡金属自组装形成的二维和三维金属超分子配合物的制备进行了系统的研究。该项目特别感兴趣的是使用基于过渡金属配合物的顶点与thicrown配体作为亚基来指导超分子结构的自组装。该项目正在准备二维结构，如正方形和六边形，以及立方三维结构。特别是，大多数与这些配体的铂族金属配合物显示出丰富的电化学活性，可以构建到多边形和多面体中。可以访问分子正方形或立方体的金属离子的多个氧化态，从而可以微调正方形或立方体的总体电荷。控制自组装材料的总电荷对其在存储应用中的应用具有重要意义。该项目在教育和培训年轻化学家成为未来的专业人员方面发挥了理想的作用。包括一个为期两年的博士后职位，模仿德雷福斯基金会的本科生学者/研究员计划。博士后不仅参与研究项目，还参与与本科生有关的兼职教学和科研活动。九名本科生研究人员将参与该项目，其中两名来自圣约学院和圣凯瑟琳学院。项目负责人、博士后、获得NSF RUI资助的本科生均为研究这些金属超分子复合物的研究团队成员。这些自组装结构在人工分子机器、战略气体储存、多相催化和一系列主客体相互作用等应用中非常重要。二维和三维金属有机网络可以形成多孔的结晶固体，这种能力已经在氢气和甲烷储存等领域得到了利用。

This RUI award in the Inorganic, Bioinorganic, and Organometallic Chemistry program supports the work of Professor Greg Grant at the University of Tennessee at Chattanooga. The research focuses on a systematic investigation of the preparation of two- and three-dimensional metallosupramolecular complexes formed by transition metal mediated self-assembly. The project is specifically interested in using vertices based upon transition metal complexes with thiacrown ligands as subunits to direct the self-assembly of the supramolecular structure. The project is preparing two-dimensional structures such as squares and hexagons as well as proceeding to cubic three-dimensional structures. In particular, most platinum group metal complexes with these ligands show a rich electrochemical activity which can then be built into the polygons and polyhedra. Multiple oxidation states for the metal ions of the molecular square or cube can be accessed, enabling the overall charge of the square or cube to be fine-tuned. Controlling the overall charge of the self-assembled material has important consequences for its utilization in storage applications. The project has an ideal role in the education and training of young chemists to be future professionals. A two-year postdoctoral position modeled after the Dreyfus Foundation's Scholar/Fellow Program for Undergraduate Institutions is included. The postdoctoral Fellow is involved not only in the research project, but also in part-time teaching and research activities involving the undergraduate students. Nine undergraduate researchers including two at other undergraduate institutions, Covenant College and the College of St. Catherine, will be involved in the project. The PI, the postdoctoral Fellow, and the undergraduate students supported by the NSF RUI Grant are all members of a research team engaged in the study of these metallosupramolecular complexes. Self-assembled structures such as these are important in applications such as artificial molecular machines, strategic gas storage, heterogeneous catalysis, and an array of host-guest interactions. The ability of two-dimensional and three-dimensional metal organic networks, which can form porous, yet crystalline solids, has been exploited in fields such as hydrogen and methane storage.