Photophysical and self-assembly properties of asymmetrical multi-aralkyl and arylaldehyde substituted pyrene derivatives

Photoelectric and Self-Assembly Properties of Tetrasubstituted Pyrene Discotic Derivatives

“…Before adding the 4a solution dropwise to the substrate, acetonitrile (10 mL) was added dropwise to the jar in order to maintain a high solvent vapor pressure. Based on this, the evaporation of the 4a solution will be relatively slow, which promotes molecular self-assembly to form the microstructures (micro-cuboids) in Figure 4 c. The results that emerged from the experiments may be due to the interaction of the self-assembly of the pyrene disk structure with the spatial structure of its substituents [ 14 , 20 , 28 ]. However, from the POM results in Figure 4 d, both of the microstructures show the typical characteristic of single crystal materials.…”

“…The energy levels were calculated using the Ferrocene (Fc) value of −4.8 eV with respect to the vacuum level, which was defined as zero. The measured oxidation potential of Fc (vs. Ag/AgCl) was 0.20 V. Therefore, the HOMO energy (E HOMO ) levels of the products could be calculated by the equation E HOMO = −[E onset ox − E 1/2 , Fc + 4.8] eV, and the LUMO energy (E LUMO ) levels could be estimated by the equation E LUMO = −[E onset red − E 1/2 , Fc + 4.8] eV, where E 1/2 , Fc stands for the half-wave potential of Fc/Fc + [ 28 ].…”