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. 2024 Jul 25;2(10):698–710. doi: 10.1021/cbmi.4c00041

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© 2024 The Authors. Co-published by Nanjing University and American Chemical Society

Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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NMR spectroscopy and relaxation dynamics of HP gas at 1.4 T and 2.5 bar pressure (except for panels c, f, and i, where variable pressure was employed). (a) ¹H NMR spectrum of HP butane gas produced from 1-butene. (b) T₁ relaxation decay of H_A and H_B protons of HP butane produced from 1-butene. (c) Pressure dependence of T₁ (H_A) of HP butane gas produced from 1-butene. (d) ¹H NMR spectrum of HP butane gas produced from 2-butene. (e) T₁ relaxation decay of H_A and H_B protons of HP butane produced from 2-butene. (f) Pressure dependence of T₁ (H_A) of HP butane gas produced from 2-butene. (g) ¹H NMR spectrum of HP propane gas. (h) T₁ relaxation decay of H_A and H_B protons in HP propane gas. (i) Pressure dependence of T₁ (H_A) in HP propane gas. Yellow, green, and purple color shading is used to guide the eye. Respective signal enhancements for H_A and H_B protons are given in red and blue for visual clarity. The NMR spectra and decay plots are shown for pressure values denoted by the corresponding red boxes in panels c, f, and i.