π-Contraction Induces High‑Spin Co Centers in 2D Conductive MOFs for Efficient Oxygen Reduction.
Two-dimensional conductive metal-organic frameworks (c-MOFs) are promising electrocatalysts for the oxygen reduction reaction (ORR), yet nearly all optimization strategies have focused on metal-node modification while the ligand scaffold remains largely unexplored. Here, we report an unconventional "π-contraction" stra...