Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions
Rongrong Huang, Chao Wang, Davin Tan, Kai Wang, Bo Zou, Yangtao Shao, Taihong Liu, Haonan Peng, Xiaogang Liu, Yu Fang
Abstract
Achieving wide-range tunable emission colors, especially in the solid state of single-fluorophore materials, remains a significant challenge. Herein, we report a molecular design strategy that affords wide-range excitation-dependent emissions spanning over ≈230 nm in crystalline states. Under the donor-π-acceptor configuration, we judiciously choose a rotatable acceptor fragment, o-carborane, to enrich conformational diversities in the crystalline state and generate conformation-dependent multicolor emissions. We further show that this molecular platform is generalizable in creating crystalline materials with multicolor emissions. Based on these materials, a high-capacity information storage device and a finite-state machine were fabricated to showcase multicolor displays and information storage.