Experimental Methods
Materials Preparation
The 2D Zn
2(ZnTCPP) MOFs were synthesized according to the previous report. Tetrakis(4-carboxyphenyl)porphyrin (TCPP) was purchased from TCI Inc. and used without any further purification. TCPP and zinc nitrate (Zn(NO
3)
2) was dissolved in a mixed solvent (N, N-Dimethylformamide: ethanol = 3:1) and heated at 80℃ for 24 hours. Purple crystals can be observed after the sample was centrifugated at 4500 rpm for 10 min and washed with ethanol in 3 times. In order to obtain 2D Zn
2(ZnTCPP) MOFs, 20 mg of the as-prepared MOF () was added to 4 mL chlorobenzene (CB) and was then sonicated
using an ultrasonic bath machine filled with water. The temperature was maintained at 15-20℃. After the sonication, the resulted samples were centrifuged at 1500 rpm for 10 minutes to remove the large particles.
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