ReviewChemistry (Weinheim an der Bergstrasse, Germany)2026
Boron-Nitrogen Covalent Bond-Embedded Multiple Resonance Emitters: Synthesis Strategy, Molecular Design, and Optoelectronic Properties.
Review in Chemistry (Weinheim an der Bergstrasse, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Organic light-emitting diodes (OLEDs) are the core of next-generation display and lighting technologies, and their performance is highly dependent on luminescent materials. Multiple resonance thermally activated delayed fluorescence (MR-TADF) materials have emerged as ideal candidates for high-color-purity and high-efficiency OLEDs due to their narrowband emission and sufficient exciton utilization efficiency. Recently, incorporating isoelectronic B─N covalent bonds into conventional B/N-doped MR-TADF skeletons has generated a new class of B─N bond-embedded MR-TADF materials. These materials not only simplify the complex synthesis process of traditional MR-TADF molecules and avoid the use of hazardous lithium reagents, but also provide a new dimension for the diversification of molecular structures and the precise regulation of optoelectronic properties. This review systematically summarizes the research progress of B─N bond-embedded MR-TADF materials and their OLEDs. First, from the synthesis strategy, the advantages and mechanism of amine-directed lithium-free borylation reaction are elaborated. Subsequently, focusing on molecular design, the effects of molecular structures on photophysical properties and device performances are discussed in detail from the aspects of π-conjugation extension, peripheral substituent engineering, heteroatom doping, and chirality engineering. Finally, it discusses challenges and future directions, aiming to provide valuable references for developing next-generation high-performance, high-color-purity OLED materials.
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