Fig. 4: Photophysical properties of the model compounds and intermolecular interaction analysis.
a Photoluminescence (PL) spectra of Me-TPMA in the solid state under an excitation wavelength (λex) of 365 nm. b Excitation spectra of Me-TPMA with an emission wavelength (λem) of 445 nm. Inset: hole-electron analysis of Me-TPMA. c PL spectra of Me-PMI-Br under a λex of 280 nm. d Excitation spectra of Me-PMI-Br with a λem of 301 nm. Inset: hole-electron analysis of Me-PMI-Br. e Normalized PL spectra of the Me-TPMA/Me-PMI-Br mixture with a molar ratio of 1:1 in the solid state under different λex. f Excitation spectra of the Me-TPMA/Me-PMI-Br mixture in the solid state taken at a λem of 533 nm. g Hirshfeld surface analysis (mapped over dnorm), and proportions of intermolecular C···H, H···H, halogen···H, and other interactions to the total intermolecular interactions based on their crystal structures.
