Epitaxially Growing 2D RGB Trichromatic Cocrystal Nanomeshes to Trigger Cross-Modulation White Light Emission

Considering their oriented crystalline structure and high luminescent efficiency, the exploration of multi-component organic cocrystal systems with tunable supramolecular nanostructures and potential RGB light emission has emerged as a captivating but challenging subject. Here, we propose a straightforward synthetic strategy to precisely govern the assembly, structure and structure-property relationship of organic cocrystals. By employing the single-crystalline template-assisted epitaxial growth (SCT-EG) method, the two-dimensional (2D) highly-aligned cocrystal nanomeshes are firstly developed to afford an exceptional RGB trichromatic system, triggering cross-modulation white light emission (WLE) with remarkable stability and regeneration capacity over six months. The transformation from random 1D microstructures to uniformly-oriented 2D nanomeshes can be attributed to the regulatory competitive intermolecular π-π, CT interactions, and partial H bond interactions among cocrystals. Moreover, the successful construction of 2D RGB trichromatic cocrystal nanomeshes system holds promise to generate full-color display, which can function as multicolor inks for photonic dynamic recognition, information encryption, and decryption. © 2024 SIOC, CAS, Shanghai, & WILEY-VCH GmbH.