Room Temperature Phosphorescence from a Benzothiophene-based N-B-N Multi-Resonance Core

2025/12/08 by Durai Karthik, Abhishek Kumar Gupta, Eli Zysman‐Colman · 1 voice
Chemistry · Engineering · Materials Science · #Luminescence and Fluorescent Materials #Organic Light-Emitting Diodes Research #Organoboron and organosilicon chemistry

paper · doi:10.26434/chemrxiv-2025-n0l7j

openalex created_date 2025/12/08 · openalex publication_date 2025/12/08 · openalex updated_date 2026/07/14

Abstract

We report a design strategy that enables room temperature phosphorescence from an N-B-N type heterocycle, reminiscent of a multi-resonance thermally activated delayed fluorescence (MR-TADF) compound, by disturbing the alternating frontier molecular orbital distribution pattern through five-membered ring fusion with the boron atom. The 2 wt% doped film in mCP host showed a long phosphorescence lifetime of 51.5 ms at 571 nm at room temperature, with an afterglow visible for up to 1 s.

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• Check out our latest in @ChemRxiv (doi.org/10.26434/che...) where we report a compound that looks like an #mrtadf emitter but in fact shows #RTP. @st-andrewschem.bsky.social @standrewsosc.bsky.social [bsky, 2 points, 0 comments]

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