Visible light controllable adsorption-desorption of gaseous toluene on β-ketoenamine-linked porous organic polymer

The porous organic polymers with high surface area are promising toluene adsorption materials while their facile desorption and regeneration remains a challenge. Herein, a beta-ketoenamine-linked porous organic polymer, 2,4,6triformylphloroglucinol- 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TFP-TAPT), was fabricated via Schiff-base reaction and explored for the adsorption-desorption of gaseous toluene under humid environment. The assynthesized TFP-TAPT exhibits the property of visible light induced adsorption of gaseous toluene while the adsorpted toluene can be desorbed simply by turning off the visible light owing to the unique photoisomerization property. This work provides a simple, energy-saving and environment-friendly toluene adsorption-desorption strategy and develops an ideal sorbent that can combine acceptable adsorption capacity with convenient desorption capacity.

Automated summary

A beta-ketoenamine-linked porous organic polymer, TFP-TAPT, was fabricated via Schiff-base reaction and demonstrated efficient adsorption-desorption of gaseous toluene under humid conditions. The TFP-TAPT showed visible light-induced toluene adsorption, which can be easily desorbed by turning off the visible light due to its unique photoisomerization property. The work provides a simple, energy-saving, and environmentally friendly strategy for toluene adsorption-desorption and presents an ideal sorbent with both high adsorption capacity and convenient desorption capacity.