研究目的
Investigating the synthesis, characterization, and properties of a new 2D organic-inorganic hybrid compound [(FBMA)2PbBr4] with reversible phase transition and fluorescent property.
研究成果
A new 2D organic-inorganic hybrid compound [(FBMA)2PbBr4] was synthesized, which undergoes a reversible phase transition from the RT space group of Pbcn to the HT space group of Cmcm. The origin of the switchable phase transition was ascribed to the movements of the cations and anions from the equilibrium position. The compound exhibited a strong emission peak at 443 nm, indicating potential application as a photoactive material.
研究不足
The little difference between simulated and experimental PXRD patterns was probably caused by containing partially disordered organic cations at the room temperature.
1：Experimental Design and Method Selection:
The compound was synthesized by reacting 3-fluoro-N-methylbenzylamine (FBMA) with PbBr2 in concentrated HBr aqueous solution. The structure was confirmed by X-ray single crystal diffraction, IR spectroscopy, and PXRD. DSC analysis was used to study phase transitions.
2：Sample Selection and Data Sources:
The compound was prepared as yellow lamellar crystals.
3：List of Experimental Equipment and Materials:
FT-IR spectrometer, TGA Mettler-Toledo Gmbh thermogravimetric analyzer, Perkin-Elmer Diamond DSC instrument, Heraeus CHN-O-Rapid, D8 ADVANCE diffractometer, UV-Vis Curry 60 spectrophotometer.
4：Experimental Procedures and Operational Workflow:
The mixed solution was heated to 90 ℃, kept stirring for fifty minutes, and cooled to room temperature.
5：Data Analysis Methods:
The structures were solved by direct methods and refined with a full-matrix least-squares technique.
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