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. 2016 Mar 25;2(3):e1501438. doi: 10.1126/sciadv.1501438

Fig. 4. Maximum enhancement levels and decay time constants observed for magnetization and singlet order.

Fig. 4

(A) Single-shot SABRE-SHEATH spectra obtained from a methanol-d4 solution containing 3 mM 15N2-diazirine, 0.125 mM [Ir(COD)(IMes)(Py)][PF6], and 240 mM D2O. Enhancements are obtained by comparison to the displayed thermal reference spectrum of the 15N2-diazirine [2-cyano-3-(D3-methyl-15N2-diazirine)-propanoic acid] in D2O. (In D2O, the chemical shift difference between the 15N nuclei is smaller than that in MeOH, and therefore, only one peak is observed.) (B) Representative T1 and TS decay measurements. T1 is measured at 120 G (12 mT) from a methanol-d4 solution containing 12 mM 15N2-diazirine, 0.125 mM [IrCl(COD)(IMes)], 1 mM Py, and 960 mM D2O. TS is measured at 3 G (0.3 mT) from a solution containing 12 mM 15N2-diazirine, 0.05 mM [IrCl(COD)(IMes)], and 0.4 mM Py. (C) The z-magnetization and singlet-order components are extracted from the data sets in (B) and fit to a single exponential (see the Supplementary Materials for further details).