Synthesis and applications of inorganic-organic hybrid gallium oxalate photochromic material

A photochromic material, organic hybrid technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, photometry, etc. Area synthesis, etc.

Active Publication Date: 2019-10-22
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the silicon-based semiconductor ultraviolet detector has the characteristics of fast response, but its limitation is that it has poor selectivity for visible light and infrared light, requires complex optical filters, and its preparation needs to be performed under ultra-high vacuum and high pressure conditions.
ZnO- and GaN-based UV detectors can easily overcome the above-mentioned limitations due to their ability to operate under harsh environmental conditions, but a common disadvantage of this class of UV detectors is that these materials are difficult to grow and produce in high-purity, uniform layers. deposition, neither doping in a controlled manner nor large-area synthesis at low cost
Although the above-mentioned UV detectors have begun to enter the market, their complex and expensive manufacturing processes limit their wide-scale application

Method used

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  • Synthesis and applications of inorganic-organic hybrid gallium oxalate photochromic material
  • Synthesis and applications of inorganic-organic hybrid gallium oxalate photochromic material
  • Synthesis and applications of inorganic-organic hybrid gallium oxalate photochromic material

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1 Synthesis and application of a kind of inorganic-organic hybrid gallium oxalate photochromic material

[0031]Gallium nitrate, 4,4'-bipyridine, phosphorous acid, choline chloride and oxalic acid were used as ionic solvents and reacted at 140°C for 3 days to synthesize a new type of photochromic crystal.

[0032] Add 1.0mmol of gallium nitrate, 1.5mmol of 4,4'-bipyridine, 1.0mmol of phosphorous acid, 10mmol of choline chloride and 12mmol of oxalic acid into a 25mL polytetrafluoroethylene-lined stainless steel kettle, and finally seal the reaction kettle Put it into an oven at 140° C. and heat it for 3 days.

[0033] After the reaction was completed, the reactor was taken out and allowed to cool naturally at room temperature; the product was removed, ultrasonically washed three times with deionized water, dried at 70°C, and finally the desired crystal was obtained.

[0034] The prepared crystal characterization results are as follows:

[0035] like figure ...

Embodiment 2

[0048] Embodiment 2 Synthesis and application of an inorganic-organic hybrid gallium oxalate photochromic material

[0049] Gallium oxide, 4,4'-bipyridine, choline chloride and oxalic acid were used as ionic solvents to react at 110°C for 2 days to synthesize a new type of photochromic crystal.

[0050] Add 0.5mmol of gallium oxide, 2mmol of 4,4'-bipyridine, 5.5mmol of choline chloride, and 20mmol of oxalic acid into a 25mL polytetrafluoroethylene-lined stainless steel kettle, and finally seal the reaction kettle and place it at 110°C heated in the oven for 2 days.

[0051] After the reaction was completed, the reactor was taken out and allowed to cool naturally at room temperature; the product was removed, ultrasonically washed three times with deionized water, dried at 70°C, and finally the desired crystal was obtained.

[0052] The prepared crystal characterization results are as follows:

[0053] The obtained crystal has good photochromic property, can change color rapid...

Embodiment 3

[0054] Example 3 Synthesis and application of an inorganic-organic hybrid gallium oxalate photochromic material

[0055] Gallium oxyhydroxide, 2,2'-bipyridine, phosphorous acid, choline chloride and oxalic acid were used as ionic solvents to react at 150°C for 13 days to synthesize a new type of photochromic crystal.

[0056] Add 1.0mmol of gallium oxyhydroxide, 1mmol of 2,2'-bipyridine, 8.0mmol of phosphorous acid, 20mmol of choline chloride, and 40mmol of oxalic acid into a 25mL polytetrafluoroethylene-lined stainless steel kettle, and finally seal the reaction kettle Put into the oven of 150 ℃ and heat for 13 days.

[0057] After the reaction was completed, the reactor was taken out and allowed to cool naturally at room temperature; the product was removed, ultrasonically washed three times with deionized water, dried at 70°C, and finally the desired crystal was obtained.

[0058] The prepared crystal characterization results are as follows:

[0059] The obtained crystal ...

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Abstract

The invention discloses an inorganic-organic hybrid gallium oxalate photochromic material synthesis method, which comprises: carrying out a reaction on a mixture of a gallium-containing metal source,an organic ligand and DESs for 2-13 days at a temperature of 110-150 DEG C under a sealing condition, wherein the gallium-containing metal source is one selected from gallium oxide, gallium oxyhydroxide and a gallium salt, the DESs are choline chloride and oxalic acid, and a molar ratio of the gallium-containing metal source to the organic ligand to the choline chloride in the DESs is 0.5-1:1-2:5-20. According to the present invention, the synthesized inorganic-organic hybrid gallium oxalate photochromic material can be used for convenient and rapid visual detection of ultraviolet index.

Description

technical field [0001] The invention relates to the technical field of photochromic materials, in particular to the synthesis and application of an inorganic-organic hybrid gallium oxalate photochromic material. Background technique [0002] Ultraviolet light refers to the light with a wavelength of 10nm to 400nm in sunlight. It is one of the many invisible rays in the sun's rays. It was discovered by British scientist Herschel in 1800. According to the wavelength, it can be divided into three categories: near ultraviolet UVA (315-380nm), far ultraviolet UVB (280-315nm) and ultra-short ultraviolet UVC (100-280nm). Among them, UVC only exists in the outer layer of the atmosphere and can be absorbed by ozone in the atmosphere; UVB can stimulate the skin to produce "erythema" effect, long-term excessive exposure can inhibit immune function, cause skin cancer, cataract; although UVA does not cause acute inflammation of the skin , but the effect on the skin is slow and can accum...

Claims

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Application Information

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IPC IPC(8): C09K9/00G01J1/50
CPCC09K9/00C09K9/02C09K2211/10C09K2211/18G01J1/50
Inventor 吴俊标娄璐琪孙华英张霞
Owner NORTHEASTERN UNIV
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