研究目的
To synthesize and characterize a new one-dimensional Cd(II) coordination polymer using H4ODPT and MBTZ ligands, and to investigate its crystal structure, thermal stability, and fluorescent properties.
研究成果
The synthesized Cd(II) complex forms a one-dimensional double chain polymer with specific structural features, including 24-membered rings and extensive hydrogen bonding, leading to a 3D supramolecular architecture. It exhibits thermal stability up to 170°C and strong fluorescent emission at 432 nm in the solid state, attributed to ligand-centered electronic transitions. This work contributes to the field of metal-organic complexes with potential applications in luminescence.
研究不足
The synthesis yield is low (12.3%), and the study is limited to solid-state properties at room temperature; potential applications in solution or other conditions are not explored. The fluorescent property is attributed to ligands, but detailed mechanistic studies are not provided.
1：Experimental Design and Method Selection:
The study involved synthesizing a Cd(II) complex through hydrothermal reaction, followed by characterization using single crystal X-ray diffraction, IR spectroscopy, elemental analysis, thermal gravimetric analysis (TGA), and luminescence measurements to determine structure and properties.
2：Sample Selection and Data Sources:
The complex was synthesized from Cd(NO3)2?6H2O, H4ODPT, MBTZ, and KOH in water. MBTZ ligand was synthesized as per literature; other reagents were commercially available and used without purification.
3：List of Experimental Equipment and Materials:
Equipment included a VECTOR 22 spectrometer for IR, Perkin Elmer 240C elemental analyzer, Perkin-Elmer Pyris 1 TGA analyzer, Hitachi F-4500 fluorescence spectrophotometer, and Siemens (Bruker) SMART CCD diffractometer for X-ray crystallography. Materials included KBr pellets, nitrogen gas for TGA, and various chemicals.
4：Experimental Procedures and Operational Workflow:
Synthesis involved heating the mixture at 160°C for 72 h in a Teflon-lined container, followed by filtration and washing. Characterization steps included IR spectroscopy (4000-400 cm?1), elemental analysis, TGA (20°C/min to 600°C under N?), luminescence measurement (excitation slit 5 nm), and X-ray diffraction (MoKα radiation, λ=0.71073 ?, 296 K).
5：71073 ?, 296 K).
Data Analysis Methods:
5. Data Analysis Methods: X-ray data were processed with SADABS for absorption correction and SHELXL-97 for structure refinement. IR peaks were identified, elemental analysis compared calculated and found values, TGA weight loss analyzed, and luminescence spectra recorded and interpreted based on ligand-centered transitions.
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