Panchromatic Donor–Acceptor Hybrid Materials for Near-Infrared-Activatable Photocatalytic Detoxification of Mustard Gas Simulants

Crystalline donor-acceptor (D-A) hybrid materials show a significant potential for photocatalytic applications, but achieving broad light absorption and high photocatalytic efficiency remains a challenge. To address this issue, herein, heteropoly blues, as electron donors, and <i>N</i>,<i>N</i>'-bis(<i>N</i>,<i>N</i>-dimethylaminoethyl)-1,4,5,8-naphthalenediimide (NDIDMA), as electron acceptors, have been introduced to these D-A hybrid materials to enhance their light-harvesting and photocatalytic capabilities. Consequently, heteropoly blue/naphthalenediimide D-A hybrid materials H₂NDIDMA·[H₅PMo₈^VIMo₄^VO₄₀]·2DMF (<b>1</b>) have been synthesized. For comparison, the isostructural fully oxidized polyoxometalate-containing counterpart, H₂NDIDMA·HPW₁₂O₄₀·2DMF (<b>2</b>), has also been prepared. As expected, hybrid <b>1</b> exhibited a broad light absorption range (300-2500 nm) and demonstrated superior photocatalytic decontamination abilities against mustard gas simulants under full-spectrum and near-infrared (NIR) light irradiation compared to hybrid <b>2</b>. Remarkably, the heteropoly blues in hybrid <b>1</b> demonstrated high stability under catalytic conditions and in ambient environments. Additionally, these stable hybrids exhibited excellent recyclability without a loss of activity after five cycles.