Rational modulation of charge polarization in covalent organic frameworks constitutes a fundamental strategy for optimizing photocatalytic performance, yet achieving precise and systematic control over these parameters remains a significant challenge. Moreover, the interplay in covalent organic frameworks between molecular dipole moments, electronic structure, and catalytic activity is poorly understood. Here, we demonstrate that controlled extension of the acceptor unit in donor–acceptor (D–A) type COFs provides an effective handle for tuning charge polarization. By systematically elongating the acceptor linker from phenylene to naphthalene and anthracene, we achieve progressive modulation of the molecular dipole moment, accompanied by narrowed bandgaps and suppressed charge recombination, as confirmed by combined spectroscopic and density functional theory analyses. When evaluated in the photocatalytic oxidation of tetrahydroisoquinolines, the anthracene-linked Aa-COF delivers near-quantitative product yield (98%) under mild conditions, with scalability demonstrated via gram-scale synthesis and solar-driven operation. Mechanistic studies implicate superoxide and singlet oxygen as the primary reactive species, while Fukui analysis identifies enhanced nucleophilicity as a key factor facilitating oxygen activation. This work establishes acceptor extension as a viable design principle for polarization-modulated COF photocatalysts, offering a generalizable approach for selective organic transformations under sustainable conditions.

This study developed a symbiotic dual-confinement strategy integrating interstitial oxygen doping and carbon coating to enhance high-entropy alloys for high-current-density zinc-air batteries. Through the combination of theoretical cluster models with the experimental synthesis of MnFeCoNiCu@C high-entropy alloys, the synergistic suppression of demetalization and kinetic optimization was investigated. The dual-confined high-entropy alloys exhibited no significant attenuation for 1600 h in zinc-air batteries and resisted large current of 100 mA cm⁻² impacts, with density functional theory calculations confirming lower d-band centers and higher formation energies, correlating with enhanced durability and reaction kinetics. This approach simultaneously addresses atomic-scale metal dissolution and nanoscale mass transfer limitations, surpassing conventional coating strategies. The findings establish a framework for designing robust high-entropy alloys, advancing their application in high-demand electrocatalysis and energy conversion technologies.