Task-specific design of a hierarchical porous aromatic framework as an ultrastable platform for large-sized catalytic active site binding.

An amine-tagged hierarchical porous aromatic framework PAF70-NH2 with ultra-stability and narrowly distributed mesopores was synthesized. PAF70-NH2 has high potential for covalently immobilizing a relatively large-sized catalyst inside its pores. This work gave a perfect example of using PAF70-NH2 as a platform for completely recyclable heterogeneous organocatalysis.