An S-Shaped Double Helicene Showing both Multi-Resonance Thermally Activated Delayed Fluorescence and Circularly Polarized Luminescence

Abstract

We present the first example of a multi-resonant thermally activated delayed fluorescent (MR-TADF) helicene, Hel-DiDiKTa. This S-shaped double helicene exhibits sky-blue emission, a singlet-triplet energy gap, DEST, of 0.15 eV and narrow emission at a peak maximum of 473

Helically chiral multiresonant thermally activated delayed fluorescent emitters and their use in hyperfluorescent organic light-emitting diodes

“…No racemization was observed at 90 ℃ over more than 5 hours as the CD signals of (P)-tBuPh-BN and (P)-DPA-tBuPh-BN remained constant (Figure S34). 31 Table 1. Photophysical data of tBuPh-BN and DPA-tBuPh-BN.…”

“…17, 18 To date, there are only a few examples of chiral MR-TADF emitters based on this strategy. They have either point, 19,20 axial, 21 planar, 22,23 or helically [24][25][26][27][28][29][30][31][32][33][34][35][36] chiral skeletons (Figure S37,…”

Helically chiral multiresonant thermally activated delayed fluorescent emitters and their use in hyperfluorescent organic light-emitting diodes

“…17, 18 To date, there are only a few examples of chiral MR-TADF emitters based on this strategy. They have either point, 19,20 axial, 21 planar, 22,23 or helically [24][25][26][27][28][29][30][31][32][33][34][35][36] chiral skeletons (Figure S37,…”