ArticleNature communications2026
Mechanical flexibility and pressure-activated emission in room-temperature phosphorescent organic crystals.
Article in Nature communications, 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
The development of organic flexible materials with advanced functionalities, particularly those exhibiting stimuli-responsive photophysical behaviour, is crucial for next-generation intelligent photonic technologies. However, achieving mechanical flexibility and pressure-activated emission in room-temperature phosphorescent organic crystals remains a significant challenge. Here we show a crystal of 4,4'-sulfonylbis(bromobenzene) that exhibits both mechanical flexibility and a 4.8-fold enhancement of room-temperature phosphorescence under high pressure. Its elastic deformability originates from a folded molecular conformation stabilized by synergistic dipole-dipole and Br···Br interactions. The pressure-activated emission arises from the synergistic interplay of strengthened spin-orbit coupling and a reduced singlet-triplet energy gap, together with suppressed exciton-vibrational coupling. This work not only establishes a strategy of folded molecular geometry for designing organic crystals with mechanical flexibility and pressure-activated emission but also provides in-depth insight into how the proportion of
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