Modulated Structures, Dynamic Jahn-Teller Processes, and Phase Transitions in Organoammonium Metal Halide Salts

该奖项是在无机、生物无机和有机金属计划中颁发的，以支持罗杰·威利特博士的研究。这项研究将研究铜(II)、锰(II)和镍(II)-卤化物单体、二聚体和高阶配合物的结构、电子光谱、磁化学性质和EPR性质。重点是研究络合物的几何和电子结构随温度的变化，无论是通过相变还是通过动态的Jahn-Teller相互作用。使用的主要实验技术将是X射线衍射法、EPR和核磁共振。%本研究涉及有机/无机混合晶体材料的某些基本性质和过程的研究。研究将集中在这些系统中随着温度的变化而发生的变化。包括在晶相中表现出连续属性的材料，以及模拟类脂和其他现象的物理属性的材料。

This award is made in the Inorganic, Bioinorganic and Organometallic Program in support of the research of Dr. Roger Willett. The research will address the structural, electronic spectroscopic, magnetochemical and EPR properties of monomeric, dimeric and higher-order Cu(II), Mn(II) and Ni(II)-halide complexes. An emphasis will be a study of the variation of the geometric and electronic structure of the complexes with temperature, either by phase transitions or by dynamic Jahn-Teller interactions. The principle experimental techniques utilized will be X-ray diffraction methods, EPR and NMR. %%% This research involves the study of certain fundamental properties and processes in mixed organic/inorganic crystalline materials. Studies will focus on the changes that occur in these systems as the temperature is varied. Included are materials that exhibit continuum properties in the crystalline phase and that mimic the physical properties of lipids and other phenomena.