Presidential Young Investigator: Nuclear Magntic Resonance Studies

总统青年研究员：核磁共振研究

• 批准号: 8957560
• 负责人: Athan Shaka
• 金额: $ 18.7万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8957560&HistoricalAwards=false
• 关键词: Presidential; Young; Investigator; Nuclear; Magntic

This project is in the general area of analytical and surface chemistry and in the subfield of nuclear magnetic resonance (NMR) spectroscopy. This research is designed to study the utility of combining magic angle spinning (MAS) of dilute spins like carbon-13 with the sensitivity of abundant spins like protons by spatial localization methods combined with high-power cross-polarization and proton decoupling. It is further proposed that the use of an appropriate pulse sequence, in combination with an rf gradient, should permit rare spin NMR spectra of localized regions of a given sample. Thus, the overall goal of this research is to obtain chemical information from an NMR spectrum within a selected region of a sample. Such an approach should have applications in many areas of chemical research including 1) organic solids and polymers, 2) reactions at interfaces, 3) isotopically labeled molecules doped into porous materials, 4) layered materials, and 5) devices subject to defects cracks or other imperfections. This five year continuing grant to the University of California at Irvine for the support of Professor Shaka as a Presidential Young Investigator is designed to promote his rapid and effective growth as an independent researcher in the area of solid state NMR spectroscopy.

这个项目是在分析和表面化学的一般领域和在核磁共振（NMR）光谱学的子领域。本研究旨在通过高功率交叉极化和质子解耦相结合的空间定位方法，研究将碳-13等稀自旋的魔角自旋（MAS）与质子等多自旋的灵敏度相结合的效用。进一步提出，使用适当的脉冲序列，结合射频梯度，应该允许罕见的自旋核磁共振谱的局部区域的给定样品。因此，本研究的总体目标是从样本的选定区域内的核磁共振光谱中获得化学信息。这种方法应该在化学研究的许多领域都有应用，包括1)有机固体和聚合物，2)界面反应，3)同位素标记的分子掺杂到多孔材料中，4)层状材料，以及5)受缺陷、裂缝或其他缺陷影响的器件。加州大学欧文分校为Shaka教授提供了为期五年的总统青年研究员资助，旨在促进他作为固态核磁共振光谱领域的独立研究员的快速有效发展。