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    • 4. 发明申请
    • TEMPERATURE-JUMP DYNAMIC NUCLEAR POLARIZATION
    • 温度 - 跳动动态核极化
    • WO2007134160A2
    • 2007-11-22
    • PCT/US2007/068654
    • 2007-05-10
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGYGRIFFIN, Robert, G.HU, Kan-NianJOO, Chan, Gyu
    • GRIFFIN, Robert, G.HU, Kan-NianJOO, Chan, Gyu
    • G06Q30/00
    • G01R33/62G01N24/08G01N24/087G01N24/10G01R33/282G01R33/30G01R33/46
    • In one aspect, the present invention provides a method for enhancing the sensitivity of liquid- state NMR or MRI experiments. In general, the method involves (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a polarizing agent with at least one unpaired electron and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the at least one unpaired electron of the polarizing agent; (c) melting the frozen sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the molten sample. In certain embodiments, the methods further comprise a step of freezing a sample in a magnetic field to provide the frozen sample in a magnetic field. The freezing, polarizing, melting and detecting steps may be repeated as many times as desired. In another aspect, the present invention provides systems for performing these methods.
    • 一方面,本发明提供了一种提高液态NMR或MRI实验灵敏度的方法。 通常,该方法包括(a)在磁场中提供冷冻样品,其中冷冻样品包括具有至少一个不成对电子的偏振剂和具有至少一个旋转半核的分析物; (b)通过用具有激发所述至少一种不成对的电子中的电子自旋跃迁的频率的辐射照射所述冷冻样品来使所述分析物的所述至少一个旋转半核偏振; (c)熔化冷冻样品以产生熔融样品; 和(d)检测熔融样品中分析物的至少一个旋转半核中的核自旋跃迁。 在某些实施方案中,所述方法还包括在磁场中冷冻样品以在磁场中提供冷冻样品的步骤。 冷冻,极化,熔化和检测步骤可以根据需要重复多次。 在另一方面,本发明提供了用于执行这些方法的系统。
    • 5. 发明申请
    • BIRADICAL POLARIZING AGENTS FOR DYNAMIC NUCLEAR POLARIZATION
    • 用于动态核极化的双极化极化剂
    • WO2008048714A2
    • 2008-04-24
    • PCT/US2007068659
    • 2007-05-10
    • MASSACHUSETTS INST TECHNOLOGYGRIFFIN ROBERT GHU KAN-NIANSWAGER TIMOTHY MSONG CHANGSIKDANE ERIC
    • GRIFFIN ROBERT GHU KAN-NIANSWAGER TIMOTHY MSONG CHANGSIKDANE ERIC
    • G01N24/08
    • G01R33/281C07D401/12G01N24/087G01R33/465G01R33/5601Y10T436/24
    • The present invention provides methods for performing dynamic nuclear polarization using biradicals with a structure of formula (I) as described herein. In general, the methods involve (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a biradical of formula (I) and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the biradical; (c) optionally melting the sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the frozen or molten sample. The present invention also provides biradicals with a structure of formula (I) with the proviso that Q 1 and Q 2 are different when X 1 and X 2 are -O-. The present invention also provides methods for making biradicals with a structure of formula (IA) as described herein.
    • 本发明提供使用如本文所述的式(I)结构的双基进行动态核极化的方法。 通常,所述方法包括(a)在磁场中提供冷冻样品,其中所述冷冻样品包括式(I)的双基和具有至少一个自旋半核的分析物; (b)通过用具有激发双向电子自旋跃迁的频率的辐射照射冷冻样品来使分析物的至少一个自旋半核偏振; (c)任选地熔化样品以产生熔融样品; 和(d)检测冷冻或熔融样品中分析物的至少一个旋转半核中的核自旋跃迁。 本发明还提供了具有式(I)结构的双基,条件是当X 1和X 2独立地相同时,Q 1和Q 2 2不同 X 2是-O-。 本发明还提供了如本文所述制备具有式(IA)结构的双基质的方法。
    • 6. 发明申请
    • TEMPERATURE-JUMP DYNAMIC NUCLEAR POLARIZATION
    • 温度 - 跳动动态核极化
    • WO2007134160A3
    • 2008-04-24
    • PCT/US2007068654
    • 2007-05-10
    • MASSACHUSETTS INST TECHNOLOGYGRIFFIN ROBERT GHU KAN-NIANJOO CHAN GYU
    • GRIFFIN ROBERT GHU KAN-NIANJOO CHAN GYU
    • G01R33/46
    • G01R33/62G01N24/08G01N24/087G01N24/10G01R33/282G01R33/30G01R33/46
    • In one aspect, the present invention provides a method for enhancing the sensitivity of liquid-state NMR or MRI experiments. In general, the method involves providing a frozen sample in a magnetic field, wherein the frozen sample includes a polarizing agent with at least one unpaired electron and an analyte with at least one spin half nucleus; polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the at least one unpaired electron of the polarizing agent; melting the frozen sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the molten sample. In certain embodiments, the methods further comprise a step of freezing a sample in a magnetic field to provide the frozen sample in a magnetic field.
    • 一方面,本发明提供了提高液态NMR或MRI实验的灵敏度的方法。 通常,该方法包括在磁场中提供冷冻样品,其中冷冻样品包括具有至少一个不成对电子的偏振剂和具有至少一个旋转半核的分析物; 通过用具有激发所述至少一个非配对电子中的电子自旋跃迁的频率的辐射照射所述冷冻样品来使所述分析物的至少一个旋转半核偏振; 熔化冷冻样品以产生熔融样品; 和(d)检测熔融样品中分析物的至少一个自旋半核中的核自旋跃迁。 在某些实施方案中,所述方法还包括在磁场中冷冻样品以在磁场中提供冷冻样品的步骤。