Compounds with Multiply Bonded Ligands as Luminescent Chromophores

Wayne州立大学化学系Darryl Williams博士在研究计划资助下，由化学系无机、生物无机和有机金属项目支持，开发高氧化态有机金属化合物作为发色团。将合成含有钽和钨与氮、烷基炔、亚胺、氧和环戊二烯基配体结合的化合物，并探索其电子激发态的反应活性。目的是研究决定金属-配体多键强度的因素以及吸收和发射数据与这种相互作用的关系。最终，这些信息将用于控制和设计利用这些连接的发光化合物。这些计划活动将为William博士的职业生涯提供基础，为他在完成这项研究计划资助后准备一份有竞争力的NSF研究计划提供基础。将制备含有金属钽和钨的化合物，其中可以与氧、氮和碳原子形成多个键。这些化合物具有发光性质，可以通过与金属和多重键合原子结合的取代基来控制。我们将研究这些化合物的电子结构和激发态反应性。与现有的系统相比，这些系统的潜在优势是对发光特性的控制程度更高。

Dr. Darryl Williams, Department of Chemistry, Wayne State University, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division under a Research Planning Grant to develop high oxidation state organometallic compounds as chromophores. Compounds containing tantalum and tungsten bound to nitrido, alkylidyne, imido, oxo, and cyclopentadienyl ligands will be synthesized, and the reactivity of their electronic excited states will be explored. The goal is to examine the factors which determine the strength of the metal-ligand multiple bond and the relationship of absorption and emission data to this interaction. Ultimately, this informaton will be used to control and design luminescent compounds using these linkages. These planning activities will advance Dr. William's career by providing a basis for preparing a competitive NSF research proposal subsequent to the completion of this Research Planning Grant. Compounds containing the metals tantalum and tungsten will be prepared in which multiple bonds can be formed to oxygen, nitrogen and carbon atoms. These compounds have luminescent properties which can be manipulated by the substituents bound to the metal and to the multiply bonded atoms. The electronic structure and excited state reactivities of a series of these compounds will be investigated. The potential advantage of these systems over those currently available is a higher degree of control over the luminescent properties.