研究目的
Investigating the synthesis, crystal structures, and luminescence sensing properties of two Zn(II) coordination polymers based on 5-substituted isophthalic acid for the detection of Hg2+ and Cr2O7 2- ions in water.
研究成果
Two zinc(II) CPs were successfully synthesized and characterized. CP 1 exhibits a 1D ladder-like chain structure, while CP 2 shows a 2D layer with 63-hcb topology. Both CPs demonstrate high sensitivity and selectivity for the detection of Hg2+ and Cr2O7 2- ions in aqueous solutions, making them promising candidates for luminescent sensors.
研究不足
The study focuses on the luminescence sensing properties of the CPs for Hg2+ and Cr2O7 2- ions, but the mechanisms of luminescence quenching and the potential interference from other ions or molecules in real-world applications are not fully explored.
1：Experimental Design and Method Selection:
The CPs were synthesized under solvothermal conditions using Zn(OAc)2·H2O, L ligand, and either 5-H2nip or 5-H2mip as co-ligands. The structures were characterized by elemental analyses, IR spectra, thermogravimetric analyses, and single-crystal X-ray diffraction.
2：Sample Selection and Data Sources:
The CPs were synthesized from commercially available reagents.
3：List of Experimental Equipment and Materials:
Perkin-Elmer 240C analyzer for elemental analyses, Avatar 360 (Nicolet) spectrophotometer for FT-IR spectra, Netzsch STA449 F1 thermal analyzer for TGA, Rigaku D/Max-2500PC X-ray diffractometer for XRPD, Edinburgh FS5 luminescence spectrophotometer for luminescence measurements.
4：Experimental Procedures and Operational Workflow:
The mixtures were stirred, heated in a Teflon-lined stainless steel vessel, and cooled to room temperature. Crystals were collected and characterized.
5：Data Analysis Methods:
The luminescence quenching efficiency was analyzed using the Stern-Volmer equation.
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Perkin-Elmer 240C analyzer
240C
Perkin-Elmer
Elemental analyses
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Rigaku D/Max-2500PC X-ray diffractometer
D/Max-2500PC
Rigaku
X-ray powder diffraction measurements
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