Luminescent material and preparation method and application thereof

Abstract

The invention discloses a luminescent material and a preparation method and application thereof.The luminescent material is prepared from sodium aluminum hydride or lithium aluminum hydride and phenol raw materials, the two substrate raw materials are compounded to serve as a photoluminescent material, the performance of a single material serving as the photoluminescent material can be obviously improved, and the performance from non-luminescence to blue light can be achieved at the room temperature. The luminescent material prepared by the invention is simple in preparation process and easily available in raw materials, and has potential application prospects in the field of luminescence.

Description

TECHNICAL FIELD

[0001] The application relates to a luminescent material and a preparation method and application, and belongs to the technical field of material preparation. BACKGROUND

[0002] The luminescent material is of great significance to the global economy and scientific and technological development, is widely used in today's society, mainly includes light emitting diodes (LED), organic light emitting diodes (OLED), nano luminescent materials, solar cell materials, organic semiconductors, etc., has the characteristics of low consumption, low temperature, fast response, high efficiency and long service life, and plays an important role in the innovation fields of new energy technology, lighting technology, display technology, information technology, biotechnology, aerospace technology, etc. Organic luminescent materials are outstanding in optoelectronic applications and are widely used in different fields and different products such as displays, lighting, sensors, etc. However, the application range and depth of organic luminescent materials are still at a low level at present, especially the application technology development capability in the field of organic light emitting devices still needs to be further improved. SUMMARY

[0003] The application adopts double-metal substitution of H atoms on an organic ring, develops a kind of luminescent material, utilizes the strong electron-donating property of sodium and aluminum metal, changes the electron cloud density on the organic ring, modulates the energy band gap of the organic substrate, so as to realize the optimization of the luminescent performance of the double-metal organic compound.

[0004] According to one aspect of the application, a luminescent material is provided, the luminescent material has a structure shown in formula I:

[0005]

[0006] In formula I, M includes metal element I and metal element II;

[0007] The metal element I is Al;

[0008] The metal element II is at least one selected from Li, Na;

[0009] n is an integer, and the value of n is 1-5.

[0010] According to another aspect of the application, a preparation method of the luminescent material is provided, and the preparation method comprises:

[0011] In a closed reactor, under a non-active atmosphere, a mixture containing a metal hydride, phenol and a solvent is stirred until the reaction is completed, and then vacuum drying is performed to obtain the luminescent material.

[0012] Optionally, the metal hydride is at least one selected from sodium aluminum hydride and lithium aluminum hydride.

[0013] Optionally, the molar ratio of the metal hydride to the phenol is 1:4-5.

[0014] Optionally, the solvent is selected from at least one of tetrahydrofuran, diethyl ether, dimethylformamide, chloroform, dichloromethane, dimethyl sulfoxide, carbon tetrachloride, acetone, dimethylformamide, diethylene glycol dimethyl ether.

[0015] Optionally, the molar concentration of the phenol after being dissolved in the solvent is 0.1-2.0 mol / L.

[0016] Optionally, the non-reactive atmosphere is selected from at least one of argon, helium, nitrogen.

[0017] Optionally, the rotation speed of the stirring is 400 r / min-600 r / min.

[0018] Optionally, the rotation speed of the stirring is independently selected from any value or a range value between any two of 400 r / min, 450 r / min, 500 r / min, 520 r / min, 550 r / min, 580 r / min, 600 r / min.

[0019] Optionally, the temperature of the stirring is 25-120℃, and the time of the stirring is 0.5 h-12 h.

[0020] Optionally, the temperature of the stirring is independently selected from any value or a range value between any two of 25℃, 50℃, 75℃, 80℃, 100℃, 110℃, 120℃.

[0021] Optionally, the time of the stirring is independently selected from any value or a range value between any two of 0.5 h, 1 h, 2 h, 5 h, 7 h, 9 h, 12 h.

[0022] According to still another aspect of the present application, there is provided an application of the luminescent material as described above in the field of photoluminescence.

[0023] The beneficial effects that can be produced by the present application include:

[0024] The luminescent material provided by the present application is prepared from sodium aluminum hydride or lithium aluminum hydride and phenol raw materials. The combination of the two substrate raw materials as a photoluminescent material can significantly improve the performance of a single material as a photoluminescent material, and can achieve blue light performance at room temperature. The luminescent material prepared by the present application has a simple preparation process, and the raw materials are easy to obtain, and has potential application prospects in the field of luminescence. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The XRD spectrum of the luminescent material 1# prepared in Example 1 of the present application compared with phenol and sodium aluminum hydride.

[0026] Figure 2 XRD spectrum of luminescent material 1# prepared in Example 1 of the present application compared with phenol. 1 H-NMR spectrum.

[0027] Figure 3 XRD spectrum of luminescent material 2# prepared in Example 2 of the present application compared with phenol and lithium aluminum hydride.

[0028] Figure 4 H-NMR spectrum of luminescent material 2# prepared in Example 2 of the present application compared with phenol. 1 H-NMR spectrum.

[0029] Figure 5 Chromaticity coordinate diagram of luminescent material 1# prepared in Test Example 1 of the present application compared with phenol. DETAILED DESCRIPTION

[0030] The present application will be described in detail below with reference to Examples, but the present application is not limited to these Examples.

[0031] In the Examples of the present application, the raw materials were purchased through commercial channels unless otherwise specified.

[0032] In the present application, phenol (99%, Aldrich), tetrahydrofuran (AR, Kermel), lithium aluminum hydride (97%, Anachem), sodium aluminum hydride (~99%, Sigma-Aldrich).

[0033] British Hydronics Temperature Programmed Desorption Mass Spectrometer (TPD-MS), PANalytical X'Pert Pro X-ray diffractometer, JEOL JNM-ECZL series nuclear magnetic resonance spectrometer, Edinburgh FS5 fluorescence spectrometer, ultraviolet-visible spectrophotometer.

[0034] Example 1

[0035]

[0036] In the glove box, 0.9411 g of phenol powder and 0.1350 g of sodium aluminum hydride powder were accurately weighed, 30 mL of tetrahydrofuran solution was added to a high-pressure reaction kettle, sealed, stirred at room temperature, the stirring rate was 500 revolutions per minute, and stirring was carried out for 3 h. After the stirring was completed, the reaction kettle was moved into the glove box, and all the solution was taken out into a 150 mL round-bottom flask, sealed, and then vacuum dried. After the solution was dried, it was moved into the glove box large warehouse, evacuated overnight, and the powder was scraped and collected to obtain luminescent material 1#. As shown in FIG. 1, compared with phenol and sodium aluminum hydride, Figure 1 it can be seen from FIG. 2 that, compared with phenol and sodium aluminum hydride, the XRD spectrum of sodium aluminum phenoxide shows a new phase. As shown in FIG. 3, compared with phenol and sodium aluminum hydride, the XRD spectrum of luminescent material 1# shows a new phase. Figure 1 Figure 2 ​It can be seen that the original -OH peak in phenol has disappeared, and the positions of other peaks have undergone chemical shifts, indicating that the luminescent material 1# has been successfully synthesized.

[0037] Example 2

[0038]

[0039] In a glove box under argon, accurately weigh 0.9411g of phenol powder and 0.0978g of lithium aluminum hydride powder. Add 30mL of tetrahydrofuran solution to an autoclave, seal, and stir at room temperature at 500 rpm for 3 hours. After stirring, move the autoclave to the glove box and transfer the entire solution to a 150mL round-bottom flask, seal, and evacuate under vacuum. Once the solution is drained, move it to the main chamber of the glove box and evacuate overnight. Scrape and collect the powder to obtain luminescent material 2#.

[0040] like Figure 3 As shown, from Figure 3 It can be seen that the XRD spectrum of luminescent material 2# shows a new phase compared with phenol and lithium aluminum hydride. Figure 4 As shown by Figure 4 It can be seen that the original -OH peak in phenol has disappeared, and the positions of other peaks have undergone chemical shifts, indicating that the luminescent material 2# has been successfully synthesized.

[0041] Test Example 1

[0042] In a glove box, 30 to 100 mg of the luminescent material 1# prepared in Example 1 was placed in a large screw-mouth quartz cuvette made of JGS-1 material with an optical path of 1 mm. After sealing, the emission spectrum of the sample was tested. According to the ultraviolet-visible absorption spectrum of the sample, the excitation wavelength and slit width were adjusted to measure the emission spectrum of the sample. The obtained emission spectrum data was input into the CIE chromaticity coordinate conversion software to obtain the CIE coordinate value of the luminescent material 1#. The specific results are shown in Table 1.

[0043] like Figure 5 As shown in the chromaticity coordinate diagram of phenol and sodium aluminum phenolate, it can be seen that the phenol after bimetallic substitution shows a light blue light-emitting property different from the original phenol, and the luminescent color tends to be darker blue, which shows that the bimetallic substitution changes the optical properties, which is reflected in the difference in the depth of the luminescent color.

[0044] Table 1

[0045] Material name CIE phenol 0.1935，0.1647 Light emitting material 1 0.1783，0.1161

[0046] As can be seen from Table 1, comparing the chromaticity coordinates CIE of phenol and luminescent material 1#, it can be seen that the introduction of the double metal changes the original luminescent color of the phenol. The chromaticity coordinates of sodium aluminum phenol change slightly on the basis of the original light blue, and the performance of emitting light blue to emitting deeper blue light can be realized at room temperature.

[0047] The above is only a few embodiments of the present application, and does not limit the present application in any form. Although the preferred embodiments are disclosed above, they are not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical contents without departing from the scope of the technical solutions of the present application, which are equivalent to equivalent embodiments, and belong to the scope of the technical solutions.

Claims

1. A luminescent material, characterized by, The luminescent material has a structure shown in formula I: In formula I, M includes metal element I and metal element II; The metal element I is Al; The metal element II is at least one selected from Li and Na; n is an integer, and n is 1-5.

2. The method of producing a luminescent material according to claim 1, characterized by, The preparation method comprises: In a closed reactor, under a non-active atmosphere, a mixture containing a metal hydride, phenol and a solvent is stirred until the reaction is completed, and then vacuum dried to obtain the luminescent material.

3. The preparation method according to claim 2, characterized in that The metal hydride is at least one selected from sodium aluminum hydride and lithium aluminum hydride.

4. The production method according to claim 2, characterized by, The molar ratio of the metal hydride to the phenol is 1:4-5.

5. The preparation method according to claim 2, characterized in that The solvent is at least one selected from tetrahydrofuran, diethyl ether, dimethylformamide, chloroform, dichloromethane, dimethyl sulfoxide, carbon tetrachloride, acetone, dimethylformamide, and diethylene glycol dimethyl ether.

6. The preparation method according to claim 2, characterized in that The molar concentration of the phenol after being dissolved in the solvent is 0.1-2.0 mol / L.

7. The preparation method according to claim 2, characterized in that The non-active atmosphere is at least one selected from argon, helium and nitrogen.

8. The preparation method according to claim 2, characterized in that The stirring speed is 400 r / min-600 r / min.

9. The preparation method according to claim 2, characterized in that The stirring temperature is 25-120℃, and the stirring time is 0.5 h-12 h.

10. The luminescent material of claim 1 is applied in the field of photoluminescence.

Images