研究目的
To report a versatile and effective strategy to generate hierarchically porous MOFs through laser photolysis, enriching the synthetic toolkit of MOFs and paving the way towards MOF lithography.
研究成果
A versatile and effective strategy to generate hierarchically porous MOFs through laser photolysis was reported. The structural integrity of mixed-linker MOFs can be maintained after laser photolysis. This method is expected to engineer hierarchical MOF structures and produce complicated MOF patterns for cascade reactions and recognition.
研究不足
The photolytic process was performed in the solid phase, as-formed residues might be trapped in the pores, resulting in a reduction in observed porosity and pore width in the MOF. Further detailed studies on photolytic mechanism through spectroscopy and simulation are currently in progress.
1：Experimental Design and Method Selection:
A controlled photolytic removal of linkers to create mesopores within microporous MOFs using a 405 nm laser.
2：Sample Selection and Data Sources:
UiO-66, a microporous robust MOF assembled by bicarbonate linkers BDC and [Zr6O4(OH)4] clusters, was selected as the prototype for photolysis. A tetracarbonate porphyrin linker TCPP was incorporated into UiO-66, serving as the photolabile linker.
3：List of Experimental Equipment and Materials:
A homemade laser system equipped with a continuous 405 nm laser.
4：Experimental Procedures and Operational Workflow:
Activated UiO-66-TCPP-5% sample was exposed to the UV laser with a measured real-time intensity of 7 × 107 W/m
5：The residence time of individual laser spots could be tuned at a millisecond level. Data Analysis Methods:
N2 sorption isotherms, PXRD patterns, TEM images, TGA, 1H NMR measurement, IR spectroscopy, and Raman scattering spectrum were used to analyze the samples.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
