Water-soluble narrow-line radicals for dynamic nuclear polarization.

Water-soluble narrow-line radicals for dynamic nuclear polarization.
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DOI:
10.1021/ja304918g
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发表时间:
2012-09-05
影响因子:
15
通讯作者:
Swager TM
Swager TM
中科院分区:
化学1区
文献类型:
--
作者:
Haze O;Corzilius B;Smith AA;Griffin RG;Swager TM

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报道了一种含1,3-二苯撑-2-苯基烯丙基(BDPA)核的高水溶性有机自由基的合成。磺化衍生物SA-BDPA在高浓度甘油/水溶液(40 mM)中保留了母体BDPA的窄EPR线宽(在5 T下<30 MHz),这使得其能够用作固体效应动态核极化(SE DNP)的极化剂。在高场魔角自旋核磁共振(MAS NMR)实验中,获得了110的灵敏度增强。BDPA基自由基合成的容易性和高的最大增强性构成了三苯甲基型窄线偏振剂的主要进步。
The synthesis of air-stable highly water-soluble organic radicals containing a 1,3-bisdiphenylene-2-phenylallyl (BDPA) core is reported. A sulfonated derivative, SA-BDPA, retains the narrow EPR linewidth (<30 MHz at 5 T) of the parent BDPA in highly concentrated glycerol/water solutions (40 mM), which enables its use as polarizing agent for solid effect dynamic nuclear polarization (SE DNP). Sensitivity enhancement of 110 was obtained in high field magic-angle-spinning nuclear magnetic resonance (MAS NMR) experiments. The ease of synthesis and high maximum enhancements obtained with the BDPA-based radicals constitute a major advance over the trityl-type narrow line polarization agents.
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