English
Functionalized covalent organic frameworks (COFs) have attracted great attention in the field of separation. However, the application of COFs adsorbents under complex flavonoid separation conditions still faces many difficulties. Here, for the first time, rod-shaped COFs molecularly imprinted polymers with abundant hydrophilic boronic acid ester affinity imprinting recognition sites were synthesized（ RCOFs-SH@BA-MIPs ）. The obtained rod-shaped COFs MIPs were first used to stabilize Pickering HIPEs, greatly enhancing the transport of flavonoid molecules in the graded porous polymer. Meanwhile, due to the introduction of hydrophilic boronic acid imprinting recognition sites, HPs@RCOFs-SH @The BA MIPs adsorbent exhibits a good contact angle (112.52 °). Obtained HPs@RCOFs-SH @BA MIPs adsorbent exhibits excellent adsorption capacity (49.0 µ mol g) and selectivity (excellent) up to 1.19 in phosphate acetic acid/water solution (T=303 K, pH=8.0, v/v, 9/1). Meanwhile, HPs@RCOFs-SH @BA MIPs exhibit rapid adsorption kinetics for NRG (180 minutes). In addition, HPs@RCOFs-SH @The BA MIPs adsorbent showed excellent stability (94.9%) after six cycles. HPs@RCOFs-SH @The effective extraction rate of BA MIPs for commercial NRG is as high as 91.0%. Abundant boric acid affinity imprinting recognition sites play an important role in the adsorption of NRG, and the lotion interfacial polymerization strategy avoids nano imprinting adsorbent（ HPs@RCOFs-SH @Leakage of BA MIPs. Finally, the good experimental results and convenient synthesis process indicate that HPs@RCOFs-SH @BA MIPs have great potential for applications in specific separation, agricultural environment, chemical engineering, and other fields.
