Hyperconjugation Engineering of π-Extended Azaphosphinines for Designing Tunable Thermally Activated Delayed Fluorescence Emitters - Zhaoxin Liu; Lingqiang Meng; Yanrong Jiang; Chao Li; Huanchao Gu; Kexuan Zhao; Ji Zhang; Hong Meng; Yi Ren (Journal of the American Chemical Society, 2025)