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. Author manuscript; available in PMC: 2022 Jan 28.
Published in final edited form as: Phys Chem Chem Phys. 2021 Jan 28;23(3):2320–2330. doi: 10.1039/d0cp06281b

Table 2: Performed experiments with PLAC using setup 2 and PH-INEPT+.

First, the hydrogenation conditions, i.e. hydrogenation duration and temperature, were optimized (PLAC.E1 and PLAC.E2). The free evolution intervals tIN,1 and tIN,2 of the sequence were varied in another experiment PLAC.E3 with a fixed hydrogenation duration thydr = 5 s. The influence of the buffer solutions B.2 and B.3 was examined in an additional set of experiments (PLAC.E4).

Buffer Timings / Parameters
PLAC.E1 B.2 tpH2 = 2 s, Variation of tbypass
tIN,1 = 60.0 ms, tIN,2 = 50.0 ms
60° C
PLAC.E2 B.2 tpH2 = 2 s, Variation of tbypass
tIN,1 = 60.0 ms, tIN,2 = 70.0 ms
90° C
PLAC.E3 B.2 tpH2 = 2 s, tbypass = 3 s
Variation of tIN,1 and tIN,2
90° C
PLAC.E4 B.2/3,
or no buffer		 tpH2 = 2 s, tbypass = 3 s
tIN,1 = 87.8 ms, tIN,2 = 70.7 ms
90° C