MRI: Acquisition of a Dynamic Nuclear Polarization (DNP) Nuclear Magnetic Resonance (NMR) System

非技术描述：这个重大研究仪器(MRI)奖是为了获得一个速调管微波源和一个动态核极化核磁共振(DNP)波谱的磁体，以及一个现有的400 MHz核磁共振控制台。DNP使用微波将检测灵敏度提高高达两个数量级，使以前通过传统核磁共振(几个月的光谱采集)难以处理的材料表征现在只需几个小时的采集时间。拥有广泛的用户基础，在能量储存、多相催化、生物材料和核磁共振方法开发方面开展不同的跨学科研究活动，从仪器收购中受益，并得到与大纽约/新泽西地区产业界的合作伙伴关系的支持。哥伦比亚大学本科生和研究生课程中的DNP核磁共振实践培训，以及哥伦比亚大学和巴纳德(哥伦比亚大学所有女性文科附属机构)之间的桥梁项目与研究相结合，以增加未被充分代表的群体在培训基础设施中的参与。技术描述：DNP核磁共振波谱彻底改变了低灵敏度元素和表面物种的表征，允许在分子水平上对具有基本或商业意义的系统进行结构指定。263 GHz速调管/400 MHz可扫描磁体提供了：i)适当的中场强度，用于研究具有大各向异性的材料(例如纳米粒子和团簇)；ii)多核核磁共振能力，使研究与技术相关的材料(例如电池和催化剂)中具有挑战性的低伽马/四极核磁共振核成为可能；以及iii)为DNP开发新的设计基。速调管微波源符合空间限制，最大限度地减少了仪器维护。该仪器的收购使和加速了对广泛的无机和生物材料的表征，重点是可持续性，以及教育活动。这一重大研究仪器奖由材料研究部门(DMR)和化学部门(CHE)联合资助。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Nontechnical Description:This Major Research Instrumentation (MRI) award is to acquire a klystron microwave source and a magnet for dynamic nuclear polarization nuclear magnetic resonance (DNP NMR) spectroscopy together with an existing 400 MHz NMR console. DNP uses microwaves to increase detection sensitivity by up to two orders of magnitude, making materials characterization that was previously intractable via a traditional NMR (spectral acquisition of months) now accessible with a collection time of hours. A broad user base with diverse, interdisciplinary research activities on energy storage, heterogeneous catalysis, biomaterials, and NMR methods development benefits from the instrument acquisition and is bolstered by partnerships with industry in the greater New York/New Jersey area. Practical training in DNP NMR in both undergraduate and graduate coursework at Columbia as well as bridge programs between Columbia and Barnard (an all women liberal arts Columbia affiliate) are integrated with research to increase the participation of underrepresented groups in the training infrastructure.Technical Description:DNP NMR spectroscopy has revolutionized the characterization of low sensitivity elements and surface species, allowing structural assignment at the molecular level for systems of fundamental or commercial interest. The 263 GHz klystron/400 MHz sweepable magnet offers i) an appropriate mid-field strength to study materials with large anisotropies (e.g. nanoparticles and clusters), ii) multinuclear NMR capabilities that enable the study of challenging low gamma/quadrupolar NMR nuclei in technologically relevant materials (e.g. batteries and catalysts), and iii) the development of new designer radicals for DNP. The klystron microwave source fits within the space constraints and minimizes instrument maintenance. The instrument acquisition enables and accelerates the characterization of a wide range of inorganic and biomaterials, with an emphasis on sustainability, as well as educational activities.This Major Research Instrumentation award is jointly funded by the Division of Materials Research (DMR) and Division of Chemistry (CHE).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.