Department of Chemistry

Publications [#326724] of Qiu Wang

Journal Articles

1. Colell, JFP; Emondts, M; Logan, AWJ; Shen, K; Bae, J; Shchepin, RV; Ortiz, GX; Spannring, P; Wang, Q; Malcolmson, SJ; Chekmenev, EY; Feiters, MC; Rutjes, FPJT; Blümich, B; Theis, T; Warren, WS, "Direct Hyperpolarization of Nitrogen-15 in Aqueous Media with Parahydrogen in Reversible Exchange.", Journal of the American Chemical SocietyJune,, 2017, 139(23), 7761-7767 [doi].
   (last updated on 2024/11/19)

   Abstract:
   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 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.