. 2015 Mar 11;119(13):7525–7533. doi: 10.1021/acs.jpcc.5b02036

Table 1. Polarization Enhancement (ε) Values for Three Aromatic Proton Sites of Pyridine (Figures 4, 5, and 7) Achieved via Conventional (ex Situ, Low-Field) SABRE and Detected by High-Resolution ¹H NMR Spectroscopy Using the Nanoscale Catalysts (PVPCs or NPCs) in d₆-Ethanol or d₄-Methanol^a.

catalyst	ε(H_o)	ε(H_p)	ε(H_m)
PVPCs (30 s)	–7	–6	–3
NPCs (30 s)	–18	–17	–7
NPCs (300 s)	–26	–39	–11
NPCs recycled	–11	–9.7	–3.2

Reported ε values are calculated from spectral integrals and are approximate, with estimated uncertainties of ∼10%. Numbers in parentheses are pH₂ bubbling times.

Table 1. Polarization Enhancement (ε) Values for Three Aromatic Proton Sites of Pyridine (Figures 4, 5, and 7) Achieved via Conventional (ex Situ, Low-Field) SABRE and Detected by High-Resolution 1H NMR Spectroscopy Using the Nanoscale Catalysts (PVPCs or NPCs) in d6-Ethanol or d4-Methanola.

Table 1. Polarization Enhancement (ε) Values for Three Aromatic Proton Sites of Pyridine (Figures 4, 5, and 7) Achieved via Conventional (ex Situ, Low-Field) SABRE and Detected by High-Resolution ¹H NMR Spectroscopy Using the Nanoscale Catalysts (PVPCs or NPCs) in d₆-Ethanol or d₄-Methanol^a.