核磁共振技术(Nuclear Magnetic Resonance,NMR)是一项具有选择性和非入侵性的化学结构分析手段。而由太赫兹波驱动的动态核极化增强核磁共振技术(Dynamic Nuclear Polarization-Nuclear Magnetic Resonance,DNP-NMR)能够大幅提高核磁...核磁共振技术(Nuclear Magnetic Resonance,NMR)是一项具有选择性和非入侵性的化学结构分析手段。而由太赫兹波驱动的动态核极化增强核磁共振技术(Dynamic Nuclear Polarization-Nuclear Magnetic Resonance,DNP-NMR)能够大幅提高核磁共振波谱信号灵敏度并能够数量级缩短检测时间,在材料、化学和生物等众多领域显示出广阔的应用前景。该论文主要介绍了基于自主研制的驱动源太赫兹回旋管和太赫兹传输线搭建的动态核极化增强核磁共振系统,实验测试过程及结果,结果表明在该系统下通过263 GHz辐射源的驱动下,核磁共振信号实现353倍增强,所获得的实验结果已接近国际领先水平。我国在该领域的相关实验研究还处于起步阶段,该论文的研究内容对国内进行基于太赫兹波驱动的动态核极化增强核磁实验及系统设备国产化具有一定的指导意义。展开更多
The DNP-enhanced NMR experiment was performed on the DBf samples doped with free radicals. The experimental results show that it becomes very easy to perform the complicateNMR experments under DNP enhancement. For the...The DNP-enhanced NMR experiment was performed on the DBf samples doped with free radicals. The experimental results show that it becomes very easy to perform the complicateNMR experments under DNP enhancement. For the sample whose spin lattice relaxation is very slow, if it is doped with appropriae quantity free radicals.展开更多
文摘核磁共振技术(Nuclear Magnetic Resonance,NMR)是一项具有选择性和非入侵性的化学结构分析手段。而由太赫兹波驱动的动态核极化增强核磁共振技术(Dynamic Nuclear Polarization-Nuclear Magnetic Resonance,DNP-NMR)能够大幅提高核磁共振波谱信号灵敏度并能够数量级缩短检测时间,在材料、化学和生物等众多领域显示出广阔的应用前景。该论文主要介绍了基于自主研制的驱动源太赫兹回旋管和太赫兹传输线搭建的动态核极化增强核磁共振系统,实验测试过程及结果,结果表明在该系统下通过263 GHz辐射源的驱动下,核磁共振信号实现353倍增强,所获得的实验结果已接近国际领先水平。我国在该领域的相关实验研究还处于起步阶段,该论文的研究内容对国内进行基于太赫兹波驱动的动态核极化增强核磁实验及系统设备国产化具有一定的指导意义。
基金Grant from the special equipment of scientific instrument of Chinese Academy of Sciences,the Ministry of Science and Technology of China(2011YQ120035)the National Natural Science Foundation of China(11405264)
文摘The DNP-enhanced NMR experiment was performed on the DBf samples doped with free radicals. The experimental results show that it becomes very easy to perform the complicateNMR experments under DNP enhancement. For the sample whose spin lattice relaxation is very slow, if it is doped with appropriae quantity free radicals.
