Organic Synthesis of Periodic 2D Polymers

2D polymers are accessible by crosslinking polymerization of monomers in 2D confinement, whereas the synthesis of their periodic congeners is still underdeveloped. The presence of a periodic order is a seemingly small addition to the network structure but poses critical problems for its realization by organic synthesis. The present contribution provides a brief overview of general issues on the synthesis of periodic 2D polymers and describes how to overcome such problems by showing a concrete example based on a topochemical polymerization strategy.