研究目的
To synthesize and characterize two new barium(II) coordination compounds using tetrazole carboxylate ligands, investigate their crystal structures, and study their luminescence properties.
研究成果
Two new Ba(II) compounds were successfully synthesized and characterized. Compound 1 forms a 1D chain structure, while compound 2 forms a 3D network. H4dtzpda exhibits more diverse coordination modes than Hatzpa. Luminescence studies show ligand-centered emission for compound 2 with a blue shift, but no emission for compound 1. These ligands are promising for constructing coordination architectures, and further investigations are ongoing.
研究不足
The study is limited to solid-state luminescence at room temperature; other conditions or applications are not explored. Compound 1 did not show detectable luminescence, indicating potential limitations in luminescent properties for certain structures.
1：Experimental Design and Method Selection:
Solvothermal reactions were used to synthesize the compounds. X-ray diffraction was employed for structural analysis, and photoluminescence spectroscopy for luminescence studies.
2：Sample Selection and Data Sources:
Hatzpa and H4dtzpda ligands were prepared according to literature methods. BaCl2·2H2O and other chemicals were purchased and used without purification.
3：List of Experimental Equipment and Materials:
Rigaku SCX mini CCD diffractometer for X-ray crystallography, NICOLET 380 spectrometer for IR spectra, Hitachi F4600 spectrofluorometer for photoluminescence spectra, KBr pellets, Teflon stainless containers, distilled water, ethanol, KOH.
4：Experimental Procedures and Operational Workflow:
For compound 1, Hatzpa was dissolved in water, pH adjusted to 6 with KOH, ethanol and BaCl2·2H2O added, sealed in a Teflon container, heated at 120°C for 48h. Similar procedure for compound 2 with H4dtzpda. Crystals were collected and analyzed.
5：8h. Similar procedure for compound 2 with H4dtzpda. Crystals were collected and analyzed.
Data Analysis Methods:
5. Data Analysis Methods: Structures were solved by direct methods and refined using SHELXTL. IR and luminescence data were analyzed using respective instruments' software.
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