A simple, yet efficient synthetic approach for the construction of
vinylene-linked conjugated porous networks was developed. Based
on the Horner–Wadsworth–Emmons reaction, the condensation
polymerization for the formation of an sp2 carbon-linkage can be
achieved at room temperature. The resulting vinylene-linked frameworks
exhibit a promising porous nature with the best surface
area of up to 1373 m2 g 1. Their intrinsic conjugated architectures
and semiconducting properties lead to photocatalytic evolution of
hydrogen from water under visible light irradiation. This new
synthesis method provides a facile means to prepare attractive
sp2 carbon linked porous organic frameworks.