In situ utilization of photogenerated hydrogen for hydrogenation reaction over a covalent organic framework.

A fully sp 2 -carbon conjugated COF (Py-FTP-COF) was designed and synthesized, exhibiting excellent hydrogen evolution rate of 5.22 mmol g -1 h -1 . More importantly, in situ hydrogenation of nitroarenes under visible-light irradiation without any additional hydrogen source was successfully accomplished for the first time over COF-based materials.