Fig. 2: Photophysical properties of aluminum β-diketiminate complexes.

a Photographic images of solutions and crystals of the complexes. UV, 365 nm. b, c UV–vis absorption and PL spectra in solutions at room temperature, respectively. d PL spectra in crystalline states at room temperature. e, f PL spectra in solutions and crystalline states at 77 K, respectively. g, h Phosphorescence decay curve of LAlBr (detected at 511 nm) and LAlI (detected at 515 nm) in crystalline states at room temperature, respectively. Solid lines represent fitting curves.