Yun‐Xia Hu, Huai Yu Wu, Jia‐Jia Li, Ming‐Chang Wang, Jia‐Min Lian, Jin Yu Luo, Yi‐Ru Fu, Zi‐Yan Chen, Yang‐Hang Guo, Jin Chen, Ke‐Zhao Du. "Lock‐and‐Key Assembly Enables Record Birefringence in Monocyclic π‐Conjugated Crystals via Spatial Confinement of Linear Polyhalide." Angewandte Chemie International Edition, 2026. doi:10.1002/anie.4675227