Direct Hyperpolarization of Nitrogen-15 in Aqueous Media with Parahydrogen in Reversible Exchange.

Direct Hyperpolarization of Nitrogen-15 in Aqueous Media with Parahydrogen in Reversible Exchange.
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DOI:
10.1021/jacs.7b00569
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发表时间:
2017-06-14
影响因子:
15
通讯作者:
Warren WS
Warren WS
中科院分区:
化学1区
文献类型:
--
作者:
Colell JFP;Emondts M;Logan AWJ;Shen K;Bae J;Shchepin RV;Ortiz GX Jr;Spannring P;Wang Q;Malcolmson SJ;Chekmenev EY;Feiters MC;Rutjes FPJT;Blümich B;Theis T;Warren WS

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Signal Amplification By Reversible Exchange (SABRE) is an inexpensive, fast, and even continuous hyperpolarization technique that uses para-hydrogen as hyperpolarization source. However, current SABRE faces a number of stumbling blocks for translation to biochemical and clinical settings. Difficulties include inefficient polarization in in water, relatively short lived 1H-polarization, and relatively limited substrate scope. Here we use a water soluble polarization transfer catalyst to hyperpolarize nitrogen-15 in a variety of molecules with SABRE-SHEATH (SABRE in Shield Enables Alignment Transfer to Heteronuclei). This strategy works in pure H2O or D2O solutions, on substrates that could not be hyperpolarized in traditional 1H-SABRE experiments, and we record 15N T1 relaxation times of up to 2 min.
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