研究目的
To synthesize and characterize two new zinc(II) coordination polymers based on flexible bis(triazole) ligands and investigate their structures, thermal stabilities, and luminescence properties.
研究成果
Two new coordination polymers were successfully synthesized, exhibiting 2D→2D polycatenated networks with hydrogen bonding and π-π interactions enhancing stability. Compound 2 showed luminescence attributed to intra-ligand charge transfer, while compound 1 did not emit light. The frameworks are thermally stable after water loss, indicating potential for functional material applications.
研究不足
The study is limited to specific ligands and zinc-based polymers; other metal ions or ligands were not explored. Luminescence properties were only measured in solid state at room temperature, and potential applications in optoelectronics are not extensively tested.
1：Experimental Design and Method Selection:
The study involved synthesizing coordination polymers at room temperature using zinc salts, flexible N-donor ligands (btre), and auxiliary O-donor ligands (nbdc and MeOip). Methods included IR spectroscopy, elemental analysis, single-crystal and powder X-ray diffraction for characterization, thermogravimetric analysis for thermal stability, and luminescence measurements.
2：Sample Selection and Data Sources:
Samples were synthesized from analytical grade reagents: Zn(NO3)2·6H2O, H2nbdc, H2MeOip, and the ligand btre prepared according to a reference. Crystals were grown by mixing solutions and allowing them to stand.
3：List of Experimental Equipment and Materials:
Equipment included a Perkin-Elmer 240C analyser for elemental analysis, Nicolet iS10 spectrophotometer for IR spectra, D/MAX-3C diffractometer for PXRD, Rigaku Saturn 724 CCD diffractometer for single-crystal X-ray diffraction, Perkin-Elmer LS50B spectrofluorimeter for luminescence, and Thermal Analyst 2100 TA Instrument and SDT 2960 for TGA. Materials included KBr pellets, CuKa and MoKa radiation sources, and various chemicals.
4：Experimental Procedures and Operational Workflow:
For synthesis, solutions of dicarboxylic acids were adjusted to pH=6 with NaOH, mixed with Zn salt and btre solution, stirred, filtered, and allowed to crystallize. Characterization involved collecting IR spectra, elemental data, diffraction patterns, and thermal and luminescence data as per standard protocols.
5：Data Analysis Methods:
Data were analyzed using software like CrystalClear and SHELXL for crystallography, with statistical methods for refinement. Luminescence and thermal data were interpreted based on emission peaks and weight loss percentages.
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Perkin-Elmer 240C analyser
240C
PerkinElmer
Elemental analysis for C, H, and N
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Nicolet iS10 spectrophotometer
iS10
Thermo Fisher
IR spectra measurement using KBr pellets
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D/MAX-3C diffractometer
D/MAX-3C
Rigaku
Powder X-ray diffraction
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Rigaku Saturn 724 CCD diffractometer
Saturn 724
Rigaku
Single-crystal X-ray diffraction
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Perkin-Elmer LS50B spectrofluorimeter
LS50B
PerkinElmer
Luminescence measurements in solid state
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Thermal Analyst 2100 TA Instrument
2100
American TA
Thermogravimetric analysis
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SDT 2960 Simultaneous TGA-DTA Instrument
SDT 2960
American TA
Simultaneous thermogravimetric and differential thermal analysis
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