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A method for preparing lead-based metal organic framework phosphorescent material

A technology of organic frameworks and phosphorescent materials, applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of complex synthesis conditions, short phosphorescent lifetime, poor stability, etc., and the method is simple , Improve rigidity, improve phosphorescence efficiency

Active Publication Date: 2022-02-22
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned existing room temperature phosphorescent MOF material synthesis conditions are complex, time-consuming, poor stability, short phosphorescent lifetime and other problems, the present invention provides a method for preparing lead-based metal organic framework phosphorescent material, comprising the following steps:

Method used

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  • A method for preparing lead-based metal organic framework phosphorescent material
  • A method for preparing lead-based metal organic framework phosphorescent material
  • A method for preparing lead-based metal organic framework phosphorescent material

Examples

Experimental program
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Embodiment 1

[0030] In Embodiment 1, the method for preparing a lead-based metal organic framework phosphorescent material comprises the following steps:

[0031] S1: Mix 0.7mol lead nitrate and 0.1mol terephthalic acid, add 40mL N,N-dimethylformamide, stir until completely dissolved to obtain a clear solution;

[0032] S2: Add 2.3 mL of triethylamine to the clear solution while stirring, and stir at room temperature for 1 h, 2 h, 3 h, 4 h and 5 h respectively, so that the clear solution becomes a milky white turbid liquid;

[0033] S3: The milky white turbid liquid was collected by centrifugation, and then washed with N,N-dimethylformamide to remove unreacted lead nitrate and terephthalic acid, and soaked in dichloromethane for 2 days to remove the N adsorbed in the product. , N-dimethylformamide, vacuum drying to obtain the target product.

[0034] Washing was performed by two dissolutions and centrifugation using N,N-dimethylformamide.

[0035] figure 1 Indicates the effect of stirri...

Embodiment 2

[0037] In Example 2, the method for preparing a lead-based metal organic framework phosphorescent material comprises the following steps:

[0038] S1: Mix 0.7mol lead nitrate and 0.1mol terephthalic acid, add 40mL N,N-dimethylformamide, stir until completely dissolved to obtain a clear solution;

[0039]S2: While stirring, add 1.6mL, 2.3mL, 3.2mL, 4.6mL and 6.4mL of triethylamine to the clear solution respectively, and stir at room temperature for 2h, so that the clear solution becomes a milky white turbid liquid;

[0040] S3: The milky white turbid liquid was collected by centrifugation, and then washed with N,N-dimethylformamide to remove unreacted lead nitrate and terephthalic acid, and soaked in dichloromethane for 2 days to remove the N adsorbed in the product. , N-dimethylformamide, vacuum drying to obtain the target product.

[0041] Washing was performed by two dissolutions and centrifugation using N,N-dimethylformamide.

[0042] figure 2 Indicates the effect of th...

Embodiment 3

[0044] In embodiment three, the method for preparing a lead-based metal organic framework phosphorescent material comprises the following steps:

[0045] S1: Mix lead nitrate and terephthalic acid in a molar ratio of 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, then add 40mL N,N-dimethylformaldehyde Amide, stirred until completely dissolved to obtain a clear solution;

[0046] S2: Add 2.3 mL of triethylamine to the clear solution while stirring, and stir at room temperature for 2 hours, so that the clear solution turns into a milky white turbid liquid;

[0047] S3: The milky white turbid liquid was collected by centrifugation, and then washed with N,N-dimethylformamide to remove unreacted lead nitrate and terephthalic acid, and soaked in dichloromethane for 2 days to remove the N adsorbed in the product. , N-dimethylformamide, vacuum drying to obtain the target product.

[0048] Washing was performed by two dissolutions and centrifugation using N,N-dimethylformamide.

[0049] image 3 R...

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Abstract

The invention provides a method for preparing a lead-based metal organic framework phosphorescent material, comprising the following steps: S1: adding N,N-dimethylformamide after mixing soluble inorganic lead salt and terephthalic acid, and stirring until completely dissolved Obtain a clear solution; S2: add triethylamine to the clear solution while stirring, and stir at room temperature to turn the clear solution into a milky white cloudy liquid; S3: centrifuge the milky white cloudy liquid to obtain the target product after post-processing. And by controlling the molar ratio of the lead ion of the soluble inorganic lead salt to terephthalic acid, the adjustment of phosphorescence from blue to green can be realized. By adjusting the molar ratio of the lead ion of the soluble inorganic lead salt to terephthalic acid and the stirring time and the volume of triethylamine to obtain structurally stable phosphorescent MOF materials. The method is simple, fast and controllable, and is suitable for large-scale preparation of phosphorescent MOF materials.

Description

technical field [0001] The invention relates to the field of crystalline functional materials, in particular to a method for preparing lead-based metal organic framework phosphorescent materials. Background technique [0002] Room-temperature phosphorescent materials have become a research hotspot because of their potential applications in electroluminescent displays, sensors, and bioimaging. Traditional inorganic room-temperature phosphorescent materials generally use rare-earth metals as the central atoms, and the raw materials are scarce and expensive. The preparation takes a long time and the post-processing is cumbersome, so they are not suitable for large-scale production. In recent years, researchers have developed molecular-based organic phosphorescent materials. Such materials have high luminous efficiency and low cost, but poor stability and harsh synthesis conditions. Therefore, how to realize room-temperature phosphorescence in a green, efficient and simple man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/28
Inventor 陈晓梅许石芬彭家伟
Owner JIMEI UNIV
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