A facile synthesis of cost-effective triphenylamine-containing porous organic polymers using different crosslinkers

- Product PTPAs via oxidative coupling reaction and F-C alkylation in one pot.
- Tri-functionalized linkers could make the pore size lower and surface area larger.
- The Qst for CO2 has a greater effect on CO2 uptake at 273 K than BET surface area.
- With a new point of view, this work extends the types of cheap crosslinkers.
- These crosslinkers could be incorporated into POPs to enhance their porosity.

The synthesis of polytriphenylamine networks (PTPAs) was accomplished by FeCl3-promoted one-step oxidative coupling reaction and Friedel-Crafts alkylation in one pot. For the first time, we used the common reagents including trimethyl orthoformate (TMOF), trimethyl orthoacetate (TMOA), triethyl orthoacetate (TEOA) and triisopropyl orthoformate (TIPO) as the crosslinkers, respectively. The highest BET specific surface area is 1543 m2 g−1, for PTPA-4. Its CO2 uptake capacity is as high as 2.65 mmol g−1 at 1.0 bar and 273 K, which makes it promising candidate for applications in environment fields. In addition, this work extends the types of cheap crosslinkers that could be incorporated into porous organic polymers to enhance their porosity.

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