Single-crystalline two-dimensional vinylene frameworks through topological conversion

Nature Chemistry, Published online: 17 April 2026; doi:10.1038/s41557-026-02136-3 Single-crystalline two-dimensional poly(arylene vinylene) frameworks are emerging as promising materials for electronic and photocatalytic applications. Now, a Mannich-elimination strategy enables their synthesis via topological conversion of imine covalent organic frameworks. Preserving lattice order during the linkage transformation is key for achieving enhanced conjugation and robust electronic performance.