2 H NMR experiments were performed at the Larmor frequency ω0/2π = 61.424 MHz on a Bruker Avance-400 spectrometer using a high-power probe with a 5 mm horizontal solenoid coil. All 2 H NMR spectra were obtained by a Fourier transform of a quadrature-detected and phase-cycled quadrupole echo after two phase-alternating 90°-pulses in the pulse sequence (90°x -τ -90°y -τ -acquisition-t), where τ = 20 μs and t is a repetition time of the sequence during accumulation of the NMR signal. The duration of π/2 pulse was 1.8-1.9 μs. Spectra were typically obtained with 400-2000 scans at low temperature and 40-80 scans at high temperature with a repetition time ranging from 0.2 to 3 s.