Molecular Organic Magnets

研究桥接基团对高自旋有机分子磁性能的影响。重点将放在定义结构参数，这是必要的，以最大限度地耦合多个自旋中心在有机分子。一个特定定义的高自旋前体的靶向合成程序将与所得高自旋分子物种的磁性测量相结合：这将建立通过分子内过程最有效偶联的桥接基团类型。这项研究的一个重点将是磁光开关的开发和后续评估，当暴露在适当波长的光下时，磁光开关能够快速改变磁性。来自有机动力学计划的这笔拨款支持加州理工学院D. A. Dougherty教授的继续研究。这些研究将集中在有机分子的合成和设计上，这些有机分子在暴露于热或光下时会表现出磁性。目标分子被有效地称为有机磁开关，将通过利用专门设计的在液氦温度下工作的设备来评估它们的磁性。这一领域的进展将为开发具有独特光学特性的有机磁体以用于电子应用提供所需的基本信息。

An investigation of the effect of bridging groups on the magnetic properties of high-spin organic molecules will be conducted. Emphasis will be placed on defining the structural parameters which are necessary to maximize coupling of multiple spin centers in organic molecules. A program of targeted synthesis of specifically defined high-spin precursors will be coupled with measurements of the magnetic properties of the resultant high-spin molecular species: this will establish the type of bridging groups which most effectively couple via an intramolecular process. A highlight of the research will be the development and subsequent evaluation of magneto-optical switches which are capable of rapid changes in magnetic properties when exposed to appropriate wavelengths of light. %%% This grant from the Organic Dynamics Program supports the continuing investigations of Professor D. A. Dougherty at the California Institute of Technology. These studies will be focused toward the synthesis and design of organic molecules which exhibit magnetic properties when exposed to heat or light. The target molecules, which are effectively known as organic magnetic switches, will be evaluated for their magnetic properties by utilization of specialized equipment designed to operate at liquid helium temperatures. Advances in this field will provide the basic information required to develop organic magnets with unique optical properties for utilization in electronics applications.