ABSTRACT A novel hyper‐cross‐linked polymer (HCP‐BNDHP) is synthesized via one‐pot Friedel–Crafts alkylation reaction by using 1,1'‐binaphthyl‐2,2'‐diyl hydrogenphosphate (BNDHP) as H‐bond donors and 1,4‐p‐dichlorobenzene as cross‐linker. The resulting polymer exhibits exceptional adsorption capabilities toward methylene blue (MB) with maximum adsorption capacities ( q m ) of 708 mg g −1 at room temperature. The polymer demonstrates rapid adsorption kinetics, achieving a removal efficiency of 94% for methylene blue within 60 min. The high adsorption performance of HCP‐BNDHP, supported by DFT theoretical calculations, indicates that the adsorption mechanism involves multiple interactions: hydrogen bonding between the nitrogen of MB and the hydrogen of HCP‐BNDHP, electrostatic interactions (especially under alkaline conditions), and π–π stacking interaction between the aromatic rings of the polymer and the dyes. Additionally, HCP‐BNDHP exhibits excellent reusability and structural stability, maintaining its adsorption performance over multiple cycles without significant degradation. This study provides valuable insights into the design of HCP with rich aromatic rings and functional groups, offering a promising strategy for the effective and rapid removal of organic dyes from wastewater.
Liu et al. (Thu,) studied this question.