Novel Polypyridine Ligands: Synthesis, Characterization, and Applications

在这个由美国国家科学基金会化学分部化学结构、动力学和机理项目支持的项目中，俄勒冈大学的刘世元将开发多吡啶配体，其中2-2'-联吡啶（bipy）中的一个吡啶单元被一个等构的1,2-二氢-1,2-氮杂环取代。这种取代导致低对称性多吡啶配体（BNbipy）与与相应金属联吡啶配合物同构的过渡金属配合物配位产生。这种等构取代方法扩大了配位化学中可接近的二萜配体的多样性。该项目包括新的硼氮杂环的合成，BNbipy配体的配位化学，以及新配体及其过渡金属配合物的物理表征方法。在这些研究中，硼化学的基础科学、配位化学以及这些新的多吡啶配体及其相应的金属配合物的光物理特性将得到揭示。2-2′-联吡啶（bipy）是配位化学中最重要和应用最广泛的配体之一。提出的研究旨在利用BN/CC等构方法来扩大双py配体的化学空间。该项目的成功完成将对配位化学、染料敏化太阳能电池、有机发光二极管材料的开发以及利用bipy衍生物的生物医学研究领域产生积极影响。该项目还将为参与的研究生和本科生提供全面和多样化的培训，包括在国家实验室和私营企业实习的机会。

In this project suppoerted by the Chemical Structure, Dynamics and Mechanism Program of the NSF Chemistry Division, Shih-Yuan Liu of the University of Oregon will develop polypyridine ligands in which a pyridine unit in 2-2'-bipyridine (bipy) is replaced by an isosteric 1,2-dihydro-1,2-azaborine heterocycle. This replacement results in low-symmetry polypyridyls ligands (BNbipy) that generate upon coordination with transition metals complexes that are isostructural to the corresponding metal bipyridine complexes. This isosteric replacement approach expands the diversity of accessible bipy ligands for coordination chemistry. The project encompasses synthesis of new boron-nitrogen heterocycles, coordination chemistry of BNbipy ligands, and physical methods for characterization of the new ligands and their transition metal complexes. Basic science in boron chemistry, coordination chemistry, and photophysical characterization of these new polypyridyl ligands and their corresponding metal complexes will be unraveled during these investigations.2-2'-Bipyridine (bipy) is among the most important and widely used ligands in coordination chemistry. The proposed research seeks to utilize the BN/CC isosterism approach to expand the chemical space of bipy ligands. Successful accomplishment of this project will positively impact the fields of coordination chemistry, dye-sensitized solar cells, organic light-emitting diode materials development, and biomedical research that utilize bipy derivatives. The project will also provide comprehensive and diverse training to the graduate students and undergraduate students involved, including internship opportunities at national laboratories and private industry.