Avance neo 400wb

All of the ¹⁹F, ²³Na and ⁷Li solid-state NMR experiments were performed on a Bruker Avance NEO 400 WB spectrometer with a magnetic field of 9.4 T, operating at frequencies of 376.61 MHz, 105.87 MHz and 155.55 MHz, respectively. The data was collected using a 3.2 mm double-resonance magic angle spinning (MAS) probe and a 15 kHz spinning rate at room temperature. In order to make quantitative experiments more effectively, the following conditions were set: the recycle delay (d1) were 5000 s, 100 s, 3000 s and the number of scans (ns) were 4, 16, 2 for ¹⁹F, ²³Na and ⁷Li solid-state NMR experiments respectively. The chemical shifts of ¹⁹F, ²³Na and ⁷Li were referenced using 1 M C₂H₄O₂F₃N aqueous solution (δ = −74.5 ppm), 1 M NaCl aqueous solution (δ = 0 ppm) and 1 M LiCl aqueous solution (δ = 0 ppm) at room temperature, respectively.

The Bruker Avance NEO 400WB high-resolution solid-state nuclear magnetic resonance spectrometer was used for ¹³C NMR spectrum measurement. The rotor was made of zirconia, with a working speed of 10 kHz and a pulse width of 4 μs. The cycle delay time was 0.5 s.