Skip to main content
. Author manuscript; available in PMC: 2020 May 23.
Published in final edited form as: J Phys Chem C Nanomater Interfaces. 2019 Apr 19;123(20):12827–12840. doi: 10.1021/acs.jpcc.9b02041

Table 1.

Summary of the Results Obtained in Homogeneous PHIP of Acetate and Pyruvate Esters: Pseudo-First Order Rate Constants, Maximal 1H and 13C PHIP Signal Intensities and Polarizations (at 85% p-H2 fraction), and Polarization Transfer Efficiency (η).

HP ester Solvent k, s–1 maximal 1H PHIP signal, a.u. maximal 13C PHIP signal, a.u.a maximal P1H, % maximal P13C, % η, %
Ethyl acetate CD3OD not estimated not estimated 34 8.1 4.4 54
Propyl acetate CD3OD 0.0143 ± 0.0006 3.5 4.4 3.0 0.35 12
Allyl acetate CD3OD 0.124 ± 0.005 19 6.4 7.2 0.74 10
Ethyl pyruvate CD3OD 0.035 ± 0.002 17 27 5.2 0.88 17
Propyl pyruvate CD3OD 0.0031 ± 0.0002 1.0 1.0 2.0 0.49 24
Allyl pyruvate CD3OD 0.15 ± 0.02 64 96 21 5.4 26
Ethyl acetate D2O not estimated 9.6 8.4 5.7 2.1 36
Allyl pyruvate D2O not estimated 3.6 1.8 3.6 0.82 23
a

These values were calculated taking into account the differences in 13C enrichment and NMR acquisition parameters used in different experiments.