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. 2020 Mar 4;11:1179. doi: 10.1038/s41467-020-14986-7

Fig. 4. Air-stability and ESR test.

Fig. 4

a Stability test for the thermo-induced sample 1B-T monitored through the combination of UV/Visible/NIR spectra (200–2500 nm) and IR spectra (2500–3000 nm). The sample was placed in air in the dark at room temperature for 6 months. The minor difference between 1B-T and 1B-T@6month was attributed to systematic errors caused by instrumental instability or shift of the sample holder. b ESR patterns for 1A, 1B-P, and 1B-T. Note: 1A is the as-prepared crystalline sample; 1B-P is the sample that was irradiated by an Xe lamp for 70 min; 1B-T is the sample that was thermally annealed at 180 °C for 150 min.