研究目的
To synthesize and characterize photochromic materials by embedding fluorinated azobenzenes into MOFs for quantitative photoswitching with visible light.
研究成果
Fluorinated azobenzenes embedded in MOFs enable quantitative photoswitching with visible light, with tF-AZB@MIL-68(In) showing high stability and no fatigue, highlighting the importance of understanding host-guest interactions for future applications.
研究不足
The photochromic properties are influenced by host-guest interactions, pore size, and guest loading, which may limit optimization; UV/vis light penetration depth in solids could affect structural changes; some systems do not achieve complete isomerization.
1：Experimental Design and Method Selection:
Gas phase loading of fluorinated azobenzenes into MOFs to create guest@MOF systems, using XRPD, IR spectroscopy, DSC/TGA, and elemental analysis for characterization.
2：Sample Selection and Data Sources:
MOFs (MOF-5, MIL-53(Al), MIL-53(Ga), MIL-68(Ga), MIL-68(In)) and fluorinated azobenzenes (tF-AZB, oF-AZB, pF-AZB) synthesized or provided.
3：List of Experimental Equipment and Materials:
STOE Stadi P diffractometer, Bruker ALPHA FT-IR spectrometer, Mettler Toledo TGA/DSC 1 Stare, synchrotron facilities (ESRF, DELTA), glass capillaries, KBr pellets, lasers (532 nm, 405 nm).
4：Experimental Procedures and Operational Workflow:
Activation of MOFs, gas phase loading of guests, sealing in capillaries under inert conditions, illumination with specific wavelengths for photoswitching, data collection and analysis.
5：Data Analysis Methods:
Le Bail fits, Rietveld refinement, IR peak integration for quantitative analysis, elemental analysis calculations.
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