IMR: Acquisition of Electron Paramagnetic Resonance Spectrometer for Organic Magnetic Materials Research and Student Training

这笔拨款支持购买一台连续波电子顺磁共振（EPR）光谱仪，这在合成新型有机磁性材料中至关重要，在表征其他磁性材料方面也很有价值。EPR光谱仪系统将取代目前20多年前不再工作的x波段EPR仪器。这种新型EPR光谱仪的优越性能将专门用于磁性材料的研究，这将补充现有的基于超导量子干涉装置（SQUID）磁强计/电纳计的体磁测量能力。这种新型光谱仪将对以下项目产生重大影响：(1)合成在环境条件下稳定的有机聚合物磁体；(2)在有序温度提高的情况下，为新型有机金属磁体提供了具有少量不成对电子的配位有机配体（高自旋有机分子）；(3)潜在磁共振成像造影剂的有机分子和具有手性p共轭体系的分子和聚合物的自由基离子；(4)无机金属基磁体、过渡金属配合物、磁性纳米结构和薄膜。指定项目的结果将在同行评审期刊、会议报告和网络出版物中传播。特别是在实用有机聚合物磁体方面的重大进展有望引起广泛关注，促进对材料基础研究的更好理解。这些研究活动将促进对磁性材料的基本理解，并可能通过基于共轭有机聚合物的软磁体的发展对未来的电子技术产生重大影响。EPR光谱仪在有机磁学跨学科领域的学生和博士后的培训和教育中是不可或缺的。光谱仪将使更先进的计算机控制操作成为可能，这将有助于培养本科生和研究生。内布拉斯加大学林肯分校材料研究的整体基础设施将得到加强，这将有利于其他研究磁性薄膜、纳米结构、金属基无机磁铁和复合物的研究人员。

This grant supports the purchase of a continuous wave electron paramagnetic resonance (EPR) spectrometer, which is essential in the synthesis of novel organic magnetic materials and is valuable in the characterization of other magnetic materials. The EPR spectrometer system will replace the current 20+ year-old X-band EPR instrument that is no longer functional. The superior capabilities of this new EPR spectrometer will be tailored to materials research in magnetism, which will complement existing bulk magnetic measurement capabilities based upon superconducting quantum interference device (SQUID) magnetometry/susceptometry. This new spectrometer will have a significant impact on the following projects: (1) synthesis of organic polymer magnets with stability at ambient conditions; (2) coordinating organic ligands with a few unpaired electrons (high-spin organic molecules) for new organometallic magnets with improved ordering temperatures; (3) organic molecules for potential magnetic resonance imaging contrast agents and radical ions of molecules and polymers with chiral p -conjugated systems; and (4) inorganic metal-based magnets, transition metal complexes, magnetic nanostructures and films. The results of the indicated projects will be disseminated in the peer review journals, conference presentations, and web-based publications. In particular, the significant progress toward practical organic polymer magnet is expected to attract wide attention, promoting better understanding of basic research in materials. These research activities will advance fundamental understanding of magnetic materials and may have a significant impact on the future electronic technology through the development of soft magnets based upon conjugated organic polymers. The EPR spectrometer is indispensable in the training and education of students and postdoctoral associates in the interdisciplinary area of organic magnetism. The spectrometer will make possible a more advanced computer-controlled operation that will facilitate the training of undergraduate and graduate students. The overall infrastructure for materials research at the University of Nebraska-Lincoln will be enhanced, which will benefit other researchers studying magnetic films, nanostructures, and metal-based inorganic magnets and complexes.