Dynamic nuclear polarization （DNP） has become a very important hyperpolarization method because it can dramatically increase the sensitivity of nuclear magnetic resonance （NMR） of various molecules. Liquid-state D...Dynamic nuclear polarization （DNP） has become a very important hyperpolarization method because it can dramatically increase the sensitivity of nuclear magnetic resonance （NMR） of various molecules. Liquid-state DNP based on Overhauser effect is capable of directly enhancing polarization of all kinds of nuclei in the system. The combination of simultaneous Overhauser multi-nuclei enhancements with the multi-nuclei parallel acquisitions provides a variety of important applications in both MR spectroscopy （MRS） and image （MRI）. Here we present two simple illustrative examples for simultaneously enhanced multi-nuclear spectra and images to demonstrate the principle and superiority. We have observed very large simultaneous DNP enhancements for different nuclei, such as XH and 23Na, 1H and 31p, 19F and 31p, especially for the first time to report sodium ion enhancement in liquid. We have also obtained the simultaneous images of 19H and 31p, 19F and 31p at low field by solution-state DNP for the first time.展开更多
基金supported by the Chinese Academy of Sciences(ZDYZ2010-2)the Ministry of Science and Technology of China (2011YQ120035)the National Natural Science Foundation of China (11405264,11274347,21221064,11575287)
文摘Dynamic nuclear polarization （DNP） has become a very important hyperpolarization method because it can dramatically increase the sensitivity of nuclear magnetic resonance （NMR） of various molecules. Liquid-state DNP based on Overhauser effect is capable of directly enhancing polarization of all kinds of nuclei in the system. The combination of simultaneous Overhauser multi-nuclei enhancements with the multi-nuclei parallel acquisitions provides a variety of important applications in both MR spectroscopy （MRS） and image （MRI）. Here we present two simple illustrative examples for simultaneously enhanced multi-nuclear spectra and images to demonstrate the principle and superiority. We have observed very large simultaneous DNP enhancements for different nuclei, such as XH and 23Na, 1H and 31p, 19F and 31p, especially for the first time to report sodium ion enhancement in liquid. We have also obtained the simultaneous images of 19H and 31p, 19F and 31p at low field by solution-state DNP for the first time.
