Nickel-modified triphenylamine-based conjugated porous polymers as precatalyst for ethylene oligomerization

Two-dimensional (2D)/three-dimensional (3D) conjugated porous polymers (CPPs) with a moderate surface area and tunable pore size are promising porous materials for catalysis. The imine-based 2D conjugated porous polymers (CPPs) was synthesized through the coupling of tris(4-aminophenyl)amine and p-phthalaldehyde and used as carrier to support nickel(II) to synthesize nickel-modified conjugated porous polymers ([email protected]) for ethylene oligomerization. The [email protected] catalyst with excellent thermal stability and pore size distributions revealed an efficient catalytic activity of 15.18 × 104 g/(mol Ni•h) and the selectivity of C6 olefin for ethylene oligomerization in cyclohexane at room temperature. Moreover, the [email protected] catalyst was prepared simply and easy to recycle, and still had excellent catalytic activity after 3 consecutive cycles. This study exposes the two-dimensional (2D) conjugated porous polymers (CPPs) for the application of ethylene oligomerization and provides theoretical support for the application of CPPs in the field of ethylene oligomerization.