Promoted Type I and II ROS Generation by a Covalent Organic Framework through Sonosensitization and PMS Activation

Abstract

Reactive oxygen species (ROS) are one of the most useful chemicals in photo-therapeutic and catalytic applications. In order to effectively generate ROS, the role of light-absorbing photosensitizers or activators for pre-ROS sources like peroxymonosulfate (PMS) is significantly essential. Although metal-based ROS-generating materials have been widely utilized due to the affordable heavy atom effect or viable catalytic sites, the potential toxicity of leached metal ions can be sometimes an undesirable hazard to humans and ecosystems. Herein, we prepare a covalent organic framework (COF) that generates both type I and II ROS upon ultrasound irradiation. In addition, the COF effectively generated ROS through PMS activation even without light sources or catalytic metal sites. We also observed synergistic ROS generation by sonosensitization and PMS activation by the COF. This work is a demonstration of the COF material functioning as both a sonosensitizer and a PMS activator.

AIE Nanozyme-Based Long Persistent Chemiluminescence and Fluorescence for POCT of Pathogenic Bacteria

“…As illustrated in Figure A, a 1:1:1 triplet state signal is observed, indicating that TEMP is catalyzed into 2,2,6,6-tetramethyl-4-piperidine nitrogen oxide (TEMPO) by 1 O 2 . DMPO can trap OH • and O 2 •– to form DMPO-OH • and DMPO-O 2 •– spin adducts, respectively. , Herein, no characteristic peaks of DMPO-OH • or DMPO-O 2 •– are observed (Figure B). The results indicate that 1 O 2 is generated from the AIE under light excitation.…”

“…The species of the generated ROS from AIE is identified via electron spin resonance with 2,2,6,6tetramethyl-4-piperidone (TEMP) as the 1 •− spin adducts, respectively. 43,44 Herein, no characteristic peaks of DMPO-OH • or DMPO-O 2…”

Emerging porous solids and sonochemistry

“…The same research group synthesized a dioxin-linked COF that decomposes organic dyes, such as methylene blue. 53 While the solvothermal synthesis of this COF has been previously reported, 54 these authors used a microwave-assisted method for its synthesis. COF-316 m was successfully prepared using 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) and tetrafluoroterephthalonitrile (TFPN) by leveraging the rapid nucleation and crystal growth promoted by microwave radiation.…”

Ionic liquid-functionalized metal organic frameworks and their composite membranes for enhanced proton transport

“…In this context, as a promising alternative solid electrolyte for PEMFCs, porous materials garnered attention due to their intrinsic advantages, such as well-ordered structure, large surface area, and pore functionalization. 17–21 These materials hold diverse potential applications in areas such as mixed gas separation, 22–24 toxic gas removal, 25–30 sensing, 31,32 light-mediated catalysis, 33–37 and therapy. 38–41 In particular, metal–organic frameworks (MOFs) with well-organized internal conduction pathways and a large pore volume containing numerous water molecules to facilitate the formation of hydrogen bond networks have been extensively investigated.…”