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. Author manuscript; available in PMC: 2020 Jul 31.
Published in final edited form as: J Am Chem Soc. 2019 Jul 16;141(30):11984–11996. doi: 10.1021/jacs.9b04474

Fig. 8.

Fig. 8.

Absolute hyperfine sign determination for hydride H2 by PESTRE at g2 = 2.008. A) 35 GHz 1H stochastic CW (thicker black line) and Davies (thinner black line) ENDOR responses around the ν- (black arrow) and ν+ (purple arrow) branch of the 1H2 doublet, and sum (red) and separate 1H1 (blue), 1H2 (green) simulations. Simulation parameters (B/B model) are listed in Table 1. B) 1H PESTRE traces collected from the ν- (black) and ν+ (purple) branch of the 1H2 doublet. Experimental Conditions: A) 1H stochastic CW ENDOR: same as in Fig. 4. 1H Davies ENDOR: Microwave frequency, 34.757 GHz; π = 80 ns; τ = 600 ns; tRF = 35 μs; repetition time, 50 ms; tmix = 5 μs; temperature, 2 K. B) Same as in A (1H Davies) except for: repetition time, 150 ms; RF frequency, 41.1 (ν-) and 64.7 (ν+) MHz.