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A kind of lead halide hybrid material and preparation method thereof

A lead chloride and lead bromide technology, applied in the field of fluorescent emitters, can solve the problems of poor luminous stability, instability, and reduced luminous intensity, and achieve high luminous performance and high stability.

Active Publication Date: 2020-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its discrete structure, this type of material is very unstable and cannot exist stably in the water phase. Even a small amount of water in the air can decompose it. At the same time, most of these materials have poor luminescence stability and sustained Excited by ultraviolet light, its luminous intensity will be reduced by 60%

Method used

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  • A kind of lead halide hybrid material and preparation method thereof
  • A kind of lead halide hybrid material and preparation method thereof
  • A kind of lead halide hybrid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 0.11g of lead chloride and 0.0344g of trans-1,4-cyclohexanedicarboxylic acid into a 15ml autoclave, add 10ml of a mixed solvent of N,N-dimethylformamide and ethanol, and then add 0.2ml of perchloric acid, followed by ultrasonication for half an hour to make it evenly mixed, then put it into an oven, heat up to 120°C at a rate of 15°C / hour, and react for 72 hours. After the reaction, cool down the system at a rate of 15°C / hour Speed ​​to 20°C, transfer the flaky colorless crystals to a beaker, wash with ethanol three times, and then dry in a constant temperature oven at 60°C.

[0041] The properties of the material obtained in this embodiment are no flaky crystals. Confirmed by single crystal X-ray diffraction characterization, the frame connection structure of the material is as follows: figure 1 As shown, it can be seen that the material possesses a highly distorted two-dimensional lead chloride inorganic layer.

[0042] Material [Pb 2 Cl 2 2+ ][ - o 2 C(C...

Embodiment 2

[0047] Weigh 0.278g of lead chloride and 0.172g of trans-1,4-cyclohexanedicarboxylic acid into a 50ml autoclave, add 20ml of a mixed solvent of N,N-dimethylformamide and ethanol, and then add 200μl perchloric acid, followed by ultrasound for half an hour to make it evenly mixed, then put it in an oven, raise the temperature to 120°C, and react for 72 hours. The flaky colorless crystals were transferred to a beaker, washed three times with ethanol, and then dried in a constant temperature oven at 60°C. The properties of the material obtained in this example are colorless flaky crystals.

Embodiment 3

[0049] Weigh 0.278g of lead chloride and 0.344g of trans-1,4-cyclohexanedicarboxylic acid into a 50ml autoclave, add 30ml of a mixed solvent of N,N-dimethylformamide and ethanol, and then add 200μl perchloric acid, followed by ultrasound for half an hour to make it evenly mixed, then put it in an oven, raise the temperature to 120°C, and react for 72 hours. The flaky colorless crystals were transferred to a beaker, washed three times with ethanol, and then dried in a constant temperature oven at 60°C. The properties of the material obtained in this example are colorless flaky crystals.

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Abstract

The invention relates to a lead halide hybrid material and a preparation method thereof. A molecular formula of the material is [Pb2X2<2+>][-O2C(C6H10)CO2<->], wherein X is Cl or Br; the specific preparation method comprises the following steps: (1) adding lead chloride or lead bromide, a carboxylic acid ligand and a solvent into a reaction kettle; after uniformly mixing, adding perchloric acid orhydrobromic acid and stirring; (2) after carrying out heating reaction, cooling, filtering, washing and drying to obtain a laminar lead halide laminar hybrid material. Compared with the prior art, asheet-shaped lead chloride and lead bromide laminar inorganic and organic hybrid material is prepared by adopting a simple one-step hydrothermal / solvothermal method and a preparation technology is simple; a special laminar structure is adopted so that a current carrier is limited in an inorganic layer and can emit fluorescent light capable of covering a whole visible light region, and furthermore,the material has a very great potential in the field of solid-state fluorescence.

Description

technical field [0001] The invention relates to a fluorescent emitter, in particular to a lead halide hybrid material and a preparation method thereof. Background technique [0002] Naturally occurring and synthetic inorganic topological materials in nature are generally composed of positively charged metal centers and negatively charged bridging ligands (O, F, Cl, Br, I). The coordination ratio of the two The number of charges determines that the extended main framework tends to form a neutral or anionic framework, and neutral / positively charged guests exist in the channels in the form of non-covalent bonds, such as zeolites, metal oxides and metals. Phosphate etc. Compared with the anionic inorganic framework, the coordination of the metal center of the cationic inorganic lattice framework is unsaturated, and the negatively charged anion in the channel is connected with the uncoordinated metal center of the inorganic layer by the formation of covalent bonds. , so the sha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/24C09K11/06
CPCC07B2200/13C09K11/06C09K2211/188
Inventor 费泓涵尹金麟杨慧敏
Owner TONGJI UNIV
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