A Porous and Stable Porphyrin Metal-Organic Framework as an Efficient Catalyst towards Visible-Light-Mediated Aerobic Cross-Dehydrogenative-Coupling Reactions.
Jiewei LiuKun ZhangZhiyao ChenZhang-Wen WeiLi ZhangPublished in: Chemistry, an Asian journal (2020)
Porphyrin metal-organic frameworks (PMOFs) are emerging as heterogeneous photocatalysts owing to the well-designed frameworks incorporated with powerful light-harvesting porphyrin chromophores. The porous and stable framework Ir-PCN-224 (which is also denoted as Ir-PMOF-1), which has been prepared by the self-assembly of Ir(TCPP)Cl (TCPP=tetrakis(4-carboxyphenyl)porphyrin) and ZrCl4 , is reported herein to be efficient for the aerobic cross-dehydrogenative carbon-phosphorus coupling reaction, giving rise to a high turn-over number (TON) of up to 17200 under visible light irradiation (λ≥420 nm). Electron paramagnetic resonance (EPR) experiments disclose that the active species might be the superoxide radical anion (O2 .- ). Additionally, the intermediate imine cation has been detected by high-resolution mass spectrometry (HRMS).
Keyphrases
- metal organic framework
- visible light
- high resolution mass spectrometry
- liquid chromatography
- energy transfer
- ionic liquid
- electron transfer
- ultra high performance liquid chromatography
- room temperature
- high intensity
- gas chromatography
- photodynamic therapy
- hydrogen peroxide
- quantum dots
- risk assessment
- nitric oxide
- heavy metals
- radiation therapy
- gold nanoparticles
- high resolution
- solid phase extraction
- light emitting