Accelerated Directional Proton-Coupled Electron Transfer Enabled by Intrinsic Dipole Field in Biomimetic α-Helical Structure - Hengyuan Bai; Weiran Zhang; Yang Li; Yutong Tang; Hao Xiong; Baige Yang; Hang Yin; Yu-Mo Zhang; Sean Xiao-An Zhang (Journal of the American Chemical Society, 2026)