[1] CARRAVETTA M, JOHANNESSEN O G, LEVITT M H. Beyond the T1 limit:singlet nuclear spin states in low magnetic fields[J]. Phy Rev Lett, 2004, 92(15):153003. [2] AND M C, LEVITT M H. Long-lived nuclear spin states in high-field solution NMR[J]. J Am Chem Soc, 2004, 126(20):6228-6229. [3] PILEIO G, CARRAVETTA M, HUGHES E, et al. The long-lived nuclear singlet state of 15N-nitrous oxide in solution[J]. J Am Chem Soc, 2008, 130(38):12582-12583. [4] GRANT A K, VINOGRADOV E. Long-lived states in solution NMR:Theoretical examples in three-and four-spin systems[J]. J Magn Reson, 2008, 193(2):177-190. [5] AHUJA P, SARKAR R, VASOS P R, et al. Long-lived states in multiple-spin systems[J]. ChemPhysChem, 2009, 10(13):2217-2220. [6] PILEIO G, CARRAVETTA M, LEVITT M H. Storage of nuclear magnetization as long-lived singlet order in low magnetic field[J]. Proc Natl Acad Sci U S A, 2010, 107(40):17135-17139. [7] TAYLER M C, LEVITT M H. Singlet nuclear magnetic resonance of nearly-equivalent spins[J]. Phys Chem Chem Phys, 2011, 13(13):5556-5560. [8] FENG Y S, THEIS T, LIANG X F, et al. Storage of hydrogen spin polarization in long-lived 13C2 singlet order and implications for hyperpolarized magnetic resonance imaging[J]. J Am Chem Soc, 2013, 135(26):9632-9635. [9] DEVIENCE S J, WALSWORTH R L, ROSEN M S. Preparation of nuclear spin singlet states using spin-lock induced crossing[J]. Phys Rev Lett, 2013, 111(17):173002. [10] STEVANATO G, ROY S S, HILLCOUSINS J, et al. Long-lived nuclear spin states far from magnetic equivalence[J]. Phys Chem Chem Phys, 2015, 17(8):5913-5922. [11] ELLIOTT S J, BROWN L J, DUMEZ J N, et al. Long-lived nuclear spin states in rapidly rotating CH2D groups[J]. J Magn Reson, 2016, 272:87-90. [12] ZHOU Z, CLAYTOR K, WARREN W S, et al. Accessing long lived 1H states via 2H couplings[J]. J Magn Reson, 2016, 263:108-115. [13] BARSKIY D A, SALNIKOV O G, ROMANOV A S, et al. NMR spin-lock induced crossing (SLIC) dispersion and long-lived spin states of gaseous propane at low magnetic field (0.05T)[J]. J Magn Reson, 2017, 276:78-85. [14] AHUJA P, SARKAR R, VASOS P R, et al. Diffusion coefficients of biomolecules using long-lived spin states[J]. J Am Chem Soc, 2009, 131(22):7498-7499. [15] SARKAR R, VASOS P R, BODENHAUSEN G. Singlet-state exchange nmr spectroscopy for the study of very slow dynamic processes[J]. J Am Chem Soc, 2007, 129(2):328-334. [16] VASOS P R, COMMENT A, SARKAR R, et al. Long-lived states to sustain hyperpolarized magnetization[J]. Proc Natl Acad Sci U S A, 2009, 106(44):18469-18473. [17] KOVTUNOV K V, TRUONG M L, BARSKIY D A, et al. Long-lived spin states for low-field hyperpolarized gas MRI[J]. Chemistry, 2014, 20(45):14629-14632. [18] ROY S S, MAHESH T S. Initialization of NMR quantum registers using long-lived singlet states[J]. Phys Rev A, 2010, 82(5):3249-3253. [19] DEVIENCE S J, WALSWORTH R L, ROSEN M S. Probing scalar coupling differences via long-lived singlet states[J]. J Magn Reson, 2016, 262:42-49. [20] SINGH M, SONI V K, MISHRA R, et al. Relaxation editing using long-lived states and coherences for analysis of mixtures[J]. Anal Chemy, 2016, 88(6):3004-3008. [21] STEVANATO G, HILL-COUSINS J T, HÅKANSSON P, et al. A nuclear singlet lifetime of more than one hour in room-temperature solution[J]. Angew Chem Int Ed Engl, 2015, 54(12):3740-3743. |