研究目的
Investigating the gas adsorption and fluorescent sensing properties of two porous lanthanide metal-organic frameworks based on 3,5-bis(2-carboxy-phenoxy)-benzoic acid.
研究成果
The study successfully synthesized two porous isomorphic Ln-MOFs with potential applications in detecting Fe3+/CrO4 2- ions in aqueous solution and in natural gas purification due to their selective gas adsorption properties.
研究不足
The study focuses on the synthesis and properties of two specific Ln-MOFs, and their applications are limited to fluorescent sensing of Fe3+ and CrO4 2- ions and gas adsorption. The stability and reusability of the MOFs under different conditions were not extensively explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of two Ln-MOFs under solvothermal conditions using the H3BCPB ligand. The structures were characterized by various techniques including PXRD, IR spectroscopy, and thermogravimetric analysis.
2：Sample Selection and Data Sources:
The samples were synthesized from commercially available reagents without further purification.
3：List of Experimental Equipment and Materials:
Equipment used included a Vario MACRO analyzer for elemental analysis, Rigaku D/Max-2500 PC diffractometer for PXRD, ZCT-A analyzer for TGA, HITACHI F-2700 fluorescence spectrophotometer for fluorescent measurements, and ASAP-2020 surface area analyzer for gas adsorption experiments.
4：Experimental Procedures and Operational Workflow:
The synthesis involved dissolving H3BCPB and lanthanide salts in a solvent mixture, adjusting pH, and heating in a Teflon-lined container. The products were characterized and their properties studied.
5：Data Analysis Methods:
The structures were solved and refined using Olex2 and SHELXL-2014. Fluorescent data were analyzed to determine quenching effects, and gas adsorption data were analyzed to determine adsorption capacities.
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