Fine-tuned asymmetric blue multiple resonance thermally activated delayed fluorescence emitters with high efficiency and narrow emission band

Abstract

Asymmetric blue multiple resonance type themally activated delayed fluorescence (TADF) materials composed of diphenylamine combined with carbazole and acridine units were synthesized and evaluated to finetune electronic and photophysical properties....

Organoboron-based multiple-resonance emitters: synthesis, structure–property correlations, and prospects

“…16 and Table 20). [202][203][204] In this procedure, the key intermediate possessing a boronic acid pinacol ester (Bpin) group is synthesised in high or moderate yield by the sequential addition of n BuLi and 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 6) with a comparable total yield (B40%). 120,124 Scheme 14 Example of sequential MR-TADF precursor construction reported in ref.…”

“…16 and Table 20). 202–204 In this procedure, the key intermediate possessing a boronic acid pinacol ester (Bpin) group is synthesised in high or moderate yield by the sequential addition of n BuLi and 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane ( i PrOBpin) to a bromine-containing precursor, with the subsequent intramolecular bora-Friedel–Crafts reaction affording fully cyclised target compounds.…”