MRI: Acquisition of an EPR Spectrometer for Research and Training at the University of Georgia

该奖项由主要研究仪器和化学研究仪器计划支持。来自格鲁吉亚大学的托德·哈罗普教授和他的同事迈克尔·约翰逊正在获得一台连续波电子顺磁共振（EPR）光谱仪。该仪器允许在各种领域进行研究，例如那些提供关于具有未配对电子的生物相关物种如何表现的洞察力的领域。一般来说，EPR光谱仪产生分子和固态材料的几何和电子结构的详细信息。它还用于获得有关自由基寿命的信息，这些自由基是参与有价值的化学转化以及可能的病理性生长起始的短寿命、高反应性物种。这些研究影响了许多领域，从无机和有机分子的合成到新型固态材料的开发，再到具有磁性和生物学意义的化合物。从正在进行的研究启发的例子，这个仪器是在本科和研究生水平的研究和教学的一个组成部分，在格鲁吉亚大学。此外，研究人员正在与该机构以外地区的大量感兴趣的用户共享光谱仪。北格鲁吉亚地区主要是本科院校的学生（北格鲁吉亚大学，达洛内加是区域影响的一个例子）免费使用该光谱仪，并在线访问光谱仪及其程序，以将研究经验扩展到校园之外。EPR光谱仪的奖项旨在加强各级研究和教育。它特别影响表征重要的含金属生物分子的研究，例如具有Fe-S簇，钴胺素，血红素的那些。该仪器还用于研究和开发金属基催化系统，如亚硝酸盐还原和环加成。此外，它还有利于金属络合物（土壤和沉积物中的铁-天然有机物）形态的环境研究。在有机半导体中的电荷转移、有机自旋阀和纳米结构软材料中的自旋标记的研究过程中，光谱仪有利于纳米材料的表征。最后，该光谱仪有助于理解无机化合物的电子特性，同时研究金属-NO键活化、二硫烯自由基和金属-金属键。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This award is supported by the Major Research Instrumentation and the Chemistry Research Instrumentation programs. Professor Todd Harrop from University of Georgia and colleague Michael Johnson are acquiring a continuous-wave electron paramagnetic resonance (EPR) spectrometer. This instrument allows research in a variety of fields such as those that provide insight on how biologically relevant species with unpaired electrons behave. In general, an EPR spectrometer yields detailed information on the geometric and electronic structure of molecular and solid-state materials. It is also used to obtain information about the lifetimes of free radicals, short-lived, highly reactive species involved in valuable chemical transformations as well as the initiation of possible pathological growth. These studies impact many areas, from the synthesis of inorganic and organic molecules to the development of new solid-state materials to compounds of magnetic and biological interest. Employing examples inspired from ongoing research, this instrument is an integral part of research and teaching at the undergraduate and graduate levels at the University of Georgia. Additionally, the investigators are sharing the spectrometer with a significant number of interested users from the area outside of this institution. The spectrometer is utilized by students from primarily undergraduate institutions in the North Georgia area (University of North Georgia, Dahlonega exemplifies one example of regional impact) free of charge with online access to the spectrometer and its programs to extend the research experience beyond campus.The award of the EPR spectrometer is aimed at enhancing research and education at all levels. It especially impacts studies characterizing important metal-containing biomolecules such as those having Fe-S clusters, cobalamin, heme. The instrumentation is also used for investigating and developing metal-based catalytic systems such as nitrite reduction and cycloadditions. In addition, it benefits environmental studies of speciation of metal complexes (iron-natural organic matter in soils and sediments). The spectrometer benefits characterization of nanomaterials during the study of charge-transfer in organic semiconductors, organic spin valves, and spin-labeling in nanostructured soft materials. Finally, the spectrometer aids in understanding the electronic characteristics of inorganic compounds while studying metal-NO bond activation, dithiolene radicals and metal-metal bonds.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.