Synthesis of Luminescent Group 14 Compounds

在这个由化学部化学合成项目资助的项目中，密苏里大学圣路易斯市分校的珍妮特·布拉多克-威尔金教授。路易斯正在开发合成策略，以制备含有硅（Si）和锗（Ge）的荧光分子。这些分子具有在固体状态下促进强光发射的结构特征。对这些化合物的结构进行修改，可以开发出能够发出蓝光、绿光或红光的空气稳定分子，用于固态应用，例如，作为屏幕显示器（有机发光二极管）和太阳能电池的组件。本项目的重点是制备含硅和锗中心的环状化合物的合成途径，这些环状化合物包含金属杂环、二苯并甲基杂环和荧光素的Si和Ge衍生物的五元和六元碳基环结构。分子独特的光电特性与其结构相关，并通过结合各种共轭外周基团连接到环结构上进行微调。在可能的情况下，这些新分子正在通过多核核磁共振和红外光谱、质谱、紫外-可见和荧光光谱、元素分析、循环伏安法和x射线晶体学进行表征。布拉多克-威尔金教授继续致力于培养和指导女本科生和研究生。此外，她目前是美国化学学会圣路易斯分会女性化学家委员会的联合主席。这项工作的更广泛的影响包括发现稳定和高效的发光化合物，用于电致发光固态应用，以及培养本科生和研究生在制备发光硅和含锗环状化合物中使用的合成和特征技术所带来的社会效益。

In this project, funded by the Chemical Synthesis Program of the Chemistry Division, Professor Janet Braddock-Wilking of the University of Missouri-St. Louis is developing synthetic strategies for the preparation of fluorescent molecules containing silicon (Si) and germanium (Ge). These molecules have structural features that promote strong light emission in the solid state. Modification of the structure of these compounds allows for the development of air-stable molecules that emit blue, green, or red light for solid-state applications, for example, as components for screen displays (organic light emitting diodes) and solar cells.This project focuses on the synthetic pathways for the preparation of cyclic compounds containing silicon and germanium centers incorporated into five- and six-membered carbon-based ring structures of Si and Ge derivatives of metallaloles, dibenzometalloles, and fluorescein. The unique optoelectronic properties of the molecules are associated with their structures and are fine-tuned by incorporating a variety of conjugated peripheral groups attached to the ring structure. The new molecules are being characterized by multinuclear NMR and IR spectroscopies, mass spectrometry, UV-Vis and fluorescence spectroscopies, elemental analysis, cyclic voltammetry, and X-ray crystallography, when possible. Professor Braddock-Wilking continues to devote efforts to train and mentor female undergraduate and graduate students. In addition, she is currently the co-chair of the St. Louis ACS Section Women Chemists Committee. The broader impacts of this work include societal benefits resulting from the discovery of stable and efficient luminescent compounds for components in electroluminescent solid-state applications as well as the training of undergraduate and graduate students on the synthetic and characteristic techniques utilized in the preparation of the luminescent silicon- and germanium-containing cyclic compounds.