研究目的
Investigating the use of a mixed-ligand metal?organic framework for two-photon responsive photocatalytic C?N and C?C coupling reactions under visible-light irradiation.
研究成果
The study demonstrates that metal?organic frameworks with high-density and ordered photoactive motifs can enhance two-photon absorption ability, enabling efficient photocatalytic C?N and C?C coupling reactions under NIR light irradiation. The two-photon responsive nature of the MOFs was verified through nonlinear correlation between catalytic efficiency and photon power intensity.
研究不足
The study is limited by the specific MOF structures used and the conditions under which the photocatalytic reactions were performed. The efficiency of the two-photon absorption and photocatalytic reactions may vary with different MOF compositions and under different light sources or intensities.
1:Experimental Design and Method Selection:
The study involved the synthesis of a series of metal?organic frameworks (MOFs) with varying proportions of bis(3,5-dicarboxyphenyl)methylpyridinium and bis(3,5-dicarboxyphenyl)pyridine ligands to investigate their two-photon absorption and photocatalytic properties.
2:Sample Selection and Data Sources:
The MOFs were characterized using powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy, scanning electron microscopy (SEM), and confocal laser scanning microscopy (CLSM).
3:List of Experimental Equipment and Materials:
Equipment included a Rigaku Smart Lab XRD instrument, Mettler-Toledo TGA/SDTA851, JASCO FT/IR-430, TU-1900 spectrophotometer, Hitachi U-4100 UV-VIS-NIR Spectrophotometer, HITACHI UHR FE-SEM SU8200, JASCO FP-6500, and Olympus Fluoview FV
4:Materials included zinc nitrate hexahydrate, DMF, acetonitrile, and formic acid. Experimental Procedures and Operational Workflow:
10 The MOFs were synthesized via solvothermal reactions, characterized, and then used as photocatalysts in C?N and C?C coupling reactions under 660 nm LED irradiation. The reactions were monitored by GC and 1H NMR.
5:Data Analysis Methods:
The photocatalytic efficiency was analyzed based on conversion rates, and the two-photon absorption properties were studied through luminescence decay measurements.
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Rigaku Smart Lab XRD instrument
Rigaku
Used for powder X-ray diffraction measurements to characterize the phase purity and structure of the MOFs.
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Mettler-Toledo TGA/SDTA851
Mettler-Toledo
Used for thermogravimetric analyses to study the thermal stability of the MOFs.
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JASCO FT/IR-430
JASCO
Used for Fourier transform infrared spectroscopy to analyze the functional groups in the MOFs.
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TU-1900 spectrophotometer
Used for liquid UV-vis spectra measurements to study the optical properties of the MOFs.
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Hitachi U-4100 UV-VIS-NIR Spectrophotometer
Hitachi
Used for solid UV-vis spectra measurements to study the optical properties of the MOFs.
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HITACHI UHR FE-SEM SU8200
HITACHI
Used for scanning electron microscopy to study the morphology of the MOFs.
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JASCO FP-6500
JASCO
Used for fluorescent spectra measurements to study the luminescence properties of the MOFs.
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Olympus Fluoview FV1000
Olympus
Used for confocal laser scanning microscopy to study the dye uptake and distribution in the MOFs.
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660 nm LEDs
Beijing China Education Au-light Co., Ltd.
Used as the light source for photocatalytic reactions.
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PL-MW2000 Photoradiometer
Perfect Light Company
Used to measure the photon power density of the light source.
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