Abstract
Asymmetric-structure perylene diimide (PDI) supramolecular photocatalysts were successfully constructed to induce robust internal electric field for efficient photocatalytic activity. Benefitting from the large dipole moment of the asymmetric-structure PDI, the internal electric field has been significantly enhanced by 8.4 times. And then the charge separation efficiency of the asymmetric-structure PDI has been dramatically improved by 2.4 times from 4.60% up to 11.22%. Thus, the asymmetric-structure PDI supramolecular presents evidently enhanced photocatalytic degradation performance, up to 4.8 times, even surpassing many reported high-activity organic photocatalysts. Meanwhile, they also exhibited a maximum 9.5-fold increase in photocatalytic hydrogen peroxide production activity. Briefly, this work throws light on enhancing the internal electric field via molecular structure modification to dramatically improve the photocatalytic performance.
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