Optimized Octahedral Geometry and Hidden Rigidity of a mer -Tridentate N-Heterocyclic Carbene Ligand Enhance Luminescence of an Fe(III) Complex - Toshiki Mochimaru; Tomohiro Ogawa; Teruyuki Honda; Kaito Segawa; Takuto Wakabayashi; Yuto Harakawa; Tatsuya Yoshida; Kiyoshi Miyata; Ken Onda (Journal of the American Chemical Society, 2026)