Developing Magnetic, Optical and Catalytic Applications of Metallacrowns

在这个由化学系化学结构、动态和机理B计划资助的项目中，密歇根大学化学系的文森特·L·佩科拉罗教授将开发具有有趣的磁性、发光和催化性能的新型金属络合物，称为金属冠醚(包含稀土、过渡金属和碱土金属离子)。这项研究的目的是利用这些金属冠醚的特性来制造能够减少磁性存储信息所需的体积的络合物，作为化学和生物样品成像的体内和体外发光剂，并制备用于精细化学品合成的新型多金属催化剂。这项工作已被用于实验室本科课程的开发，并可能吸引本科生和可能的高中生参与。此外，这项工作也被用作密歇根大学本科生关于这一主题的学术创造力的一个例子。金属大循环(MC)是金属大循环，自那以来因其结构的多功能性和富含金属的拓扑结构而引起了相当大的关注。特别令人感兴趣的是一大系列3D-4F异金属MC，其中包含一个过渡金属离子和一个稀土(Ln3+)离子。这一建议的主要目的是开发这种类型的MC在1)分子识别和催化，2)发光和非线性光学(NLO)的光学材料和3)分子磁性方面的应用潜力。在这项工作中生产的材料具有巨大的商业用途潜力。底物特定的催化材料有可能改进化学工业中的合成过程，而磁性材料的MC研究则有可能使数据存储发生革命性的变化，并增强对磁性现象的理解。基于含锌(II)或镓(III)和Ln3+离子的MC的发光材料在近红外生物成像和远程光纤通信方面特别有希望，同时作为NLO固体也很有前途。

In this project funded by the Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division, Professor Vincent L. Pecoraro of the Department of Chemistry at the University of Michigan will develop new classes of metal complexes known as metallacrowns (containing lanthanides, transition and alkali earth metal ions) with interesting magnetic, luminescent and catalytic properties. The goal of this research is to exploit the characteristics of these metallacrowns to make complexes that will reduce the volume necessary to store information magnetically, that may be used as in vivo and in vitro luminescent agents for the imaging of chemical and biological samples and to prepare new multimetallic catalysts for fine chemicals synthesis. This work has been used for the development of laboratory undergraduate courses and likely will engage both undergraduate and possibly high school student participation. Also, this work is used as an example of creativity in scholarship in an undergraduate course on this subject at the University of Michigan.Metallacrowns (MC) are metallamacrocycles that have since garnered considerable attention for their structural versatility and metal-rich topology. Of particular interest is a vast series of 3d-4f heterometallic MCs that contain a transition metal ion and a lanthanide (Ln3+)ion. The main objectives of this proposal are to exploit the potential of this type of MC for applications in 1) molecular recognition and catalysis, 2) optical materials for luminescence and non-linear optics (NLO) and 3) molecular magnetism. Materials produced in this work have great potential to find commercial use. Substrate specific catalytic materials have potential to improve synthetic processes in the chemical industry, while MC research on magnetic materials has the potential to revolutionize data storage and enhance the understanding of magnetic phenomena. Lumiphores based on MCs containing Zn(II) or Ga(III) and Ln3+ ions are particularly promising for near-IR biological imaging and long range fiber optic telecommunications while application as NLO solids are also promising.