The construction of a two-dimensional supramolecular organic framework with parallelogram pores and stepwise fluorescence enhancement.

A novel single-layer two-dimensional (2D) supramolecular organic framework (SOF) with parallelogram pores has been assembled to turn on the fluorescence emission of a non-emissive building block, and the emission could be further enhanced by the aggregation of the as-prepared 2D monolayers.