Construction of a novel pyrene-based two-dimensional supramolecular organic framework and the selective regulation of reactive oxygen species for photocatalysis

Abstract

We report herein a novel pyrene-based two-dimensional supramolecular organic framework (SOF) in water via host–guest interactions, which exhibits regulation of ROS and high photocatalytic efficiency.

Tetraphenylethylene-based photoresponsive supramolecular organic framework and its metallization for photocatalytic redox reactions

“…This observation suggests that the binding ratio between NA-TPE , MV-TPE, and CB[8] was 1 : 2 : 4. 36–39 The aforementioned findings demonstrate the successful acquisition of the three-component SOF by the self-assembly process involving MV-DPY , NA-TPE , and CB[8] (Scheme 2).…”

“…Based on our former success in the fabrication of SOFs, 36–39 to fabricate photoresponsive SOFs for photocatalytic reactions, a tetraphenylethylene derivative, NA-TPE , was first designed considering its high photoactivity and high symmetrical characteristics; then, it was synthesized through a one-step reaction according to our previous report (Scheme S1 and Fig. S1†).…”

“…1a, the UV-vis absorption curve of MV-DPY revealed that it exhibits two distinct absorption peaks at 260 nm and 316 nm, which should be attributed to the absorption of the MV unit. 36–39 The NA-TPE aqueous solution exhibits absorption peaks around a wavelength of 320 nm. Upon the introduction of NA-TPE and CB[8] into MV-DPY ( NA-TPE : MV-DPY : CB[8] = 1 : 2:4), the absorbance at 260 nm of the combined solution was significantly increased and displayed a distinct new absorption peak at 526 nm.…”

“…The occurrence of this phenomenon can be ascribed to the charge transfer between the electron-rich NA unit and the electron-deficient MV unit because they are both encapsulated in the cavity of CB[8] . 34–37 Meanwhile, the fluorescence lifetimes of NA-TPE , MV-DPY and MVDPY-NATPE-CB[8] were studied, which were determined to be 4.19 ns, 2.87 ns and 4.25 ns (Fig. S4†), respectively.…”

“…24–30 Their advantages in succinct synthesis under mild conditions and consistent solubility in normal solvents, including water, endow them with distinguished properties for wide applications, even in homogeneous catalytic reactions. 31–39 Owing to their structural regularity and synthetic tunability, SOFs offer a fascinating opportunity to arrange light-harvesting antennae and catalytic centers in a hierarchical way for photocatalytic reactions. Although considerable attention has been devoted to the assemblies of SOFs by host–guest interactions thus far, 40–56 the fabrication of photoresponsive SOFs for photocatalytic applications still needs to be deeply investigated.…”