Photophysics of Exchange-Coupled Compounds

密歇根州立大学的James McCusker得到了无机，生物无机和有机化学计划的支持，研究过渡金属络合物激发态的化学，特别是含有顺磁性配体的Cr（III）物种的超快反应。 这项研究的兴趣集中在表征和解释过渡金属络合物的光化学重要激发态中两个或多个未配对电子之间的耦合所产生的效应。超快过程将通过光谱技术和大量的计算来研究，虽然过渡金属配合物中几个未成对电子之间的耦合所涉及的能量在绝对尺度上往往很小，但这种效应往往决定了这类化合物的化学和物理性质。电子和磁耦合对过渡金属配合物的光化学和光物理性质的影响的研究相对较少。根据这一提议提出的研究有可能大大扩展对电子-电子耦合对过渡金属物种光化学反应性的深刻影响的科学理解。这种理解在重要的技术领域有许多潜在的应用，例如使用新型分子基磁光材料设计和制造电子器件。

James McCusker of Michigan State University is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program for research on the chemistry of excited states of transition metal complexes, particularly on ultra fast reactions of Cr(III) species that contain paramagnetic ligands. Interest in this research is centered on characterizing and explaining effects that arise from coupling between two or more unpaired electrons in the photochemically important excited states of transition metal complexes. Ultrafast process will be studied by spectroscopic techniques, accompanied by extensive computations.Although the energies involved in coupling between several unpaired electrons in transition-metal complexes are often small on an absolute scale, such effects often determine the chemical and photophysical properties of such compounds. There has been relatively little prior study of the influence of electronic and magnetic coupling on photochemical and photophysical properties of transition metal complexes. The research proposed under this proposal has the potential greatly to expand scientific understanding of profound effects that electron-electron coupling exerts on phochemical reactivity of transition metal species. There are many potential applications of such understanding in important technological areas, such as the design and fabrication of electronic devices using novel molecular based magneto-optical materials.