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. 2021 Jan 7;27(8):2837–2853. doi: 10.1002/chem.202004748

Figure 2.

Figure 2

(a) Absorption, and (b) emission spectra of 1, 2, 1M, 2M, 1H, and 2H in MeCN (λ ex=337 nm); (c) absorption (solid lines), and emission (dashed lines) spectra of 1M in THF, MeOH, MeCN, DMSO, water and in the solid state; and (d) absorption (solid lines) and emission (dashed lines) spectra of 2M in MeOH, MeCN, DMSO, water and in the solid state. Very weak emission for 1M at 405–430 nm and for 2M at 420–440 nm might be due to the presence of traces of neutral compounds 1 and 2, respectively. All measurements were carried out in deoxygenated solvents.