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Preparation method of multicolor luminous fluorescent crystal material for imidazole and silver complex

A technology of fluorescent crystals and complexes, applied in luminescent materials, silver organic compounds, organic chemical methods, etc., can solve the problems of high cost, environmental pollution, harsh preparation conditions, etc., and achieve low cost, good photostability, and luminous efficiency. high effect

Active Publication Date: 2016-08-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since most crystal luminescent materials are prepared by high-temperature pulling method or molten salt method, the preparation conditions are relatively harsh, and the cost is high, and it also causes certain pollution to the environment.

Method used

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  • Preparation method of multicolor luminous fluorescent crystal material for imidazole and silver complex
  • Preparation method of multicolor luminous fluorescent crystal material for imidazole and silver complex
  • Preparation method of multicolor luminous fluorescent crystal material for imidazole and silver complex

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: Weigh 200.0mg AgBr or AgI, 40.0mg 1,4-bis(2-methyl-imidazol-1-yl)butane, add to 5ml deionized water, 5ml ethanol, 5ml N,N-di Methylformamide mixed solvent, then add 1ml 25% ammonia water or 1ml 0.25mol / L NaOH solution, and stir at room temperature for 5h to obtain a mixed uniform suspension with a pH value > 7. The homogeneously mixed suspension was added to a 25ml autoclave and heated at 180°C for 72h, then heated at 3°Ch -1 Cool down to room temperature at a cooling rate. The obtained precipitate was washed several times with water to obtain colorless needle-like crystals. The yield was calculated to be 72.8% based on the 1,4-bis(2-methyl-imidazol-1-yl)butane used. Bright light yellow light (AgBr) or deep yellow light (AgI) can be seen with a 4W portable fluorescent lamp.

Embodiment 2

[0031] Example 2: Weigh 300.0mg AgBr or AgI, 20.0mg 1,4-bis(2-methyl-imidazol-1-yl)butane, add 0.5ml deionized water, 2ml ethanol, 10ml N,N- dimethylformamide mixed solvent, then add 1ml 25% ammonia water or 1ml 0.25mol / L NaOH solution, and stir at room temperature for 5h to obtain a mixed uniform suspension with a pH value > 7. The homogeneously mixed suspension was added to a 25ml autoclave and heated at 210°C for 72h, then heated at 3°Ch -1 Cool down to room temperature at a cooling rate. The obtained precipitate was washed several times with water to obtain colorless needle-like crystals. The yield was calculated to be 52.5% based on the 1,4-bis(2-methyl-imidazol-1-yl)butane used. Bright light yellow light (AgBr) or deep yellow light (AgI) can be seen with a 4W portable fluorescent lamp.

Embodiment 3

[0032]Example 3: Weigh 100.0mg AgBr or AgI, 50.0mg 1,4-bis(2-methyl-imidazol-1-yl)butane, add to 5ml deionized water, 5ml ethanol, 5ml N,N-di Methylformamide mixed solvent, then add 1ml 25% ammonia water or 1ml 0.25mol / L NaOH solution, and stir at room temperature for 5h to obtain a mixed uniform suspension with a pH value > 7. The homogeneously mixed suspension was added to a 25ml autoclave and heated at 80°C for 72h, then heated at 3°Ch -1 Cool down to room temperature at a cooling rate. The obtained precipitate was washed several times with water to obtain colorless needle-like crystals. The yield was calculated to be 62.5% based on the 1,4-bis(2-methyl-imidazol-1-yl)butane used. Bright light yellow light (AgBr) or deep yellow light (AgI) can be seen with a 4W portable fluorescent lamp.

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Abstract

The invention relates to efficient multicolor luminous fluorescent crystal material for preparing novel imidazole and silver complex and preparation method of the material. [Ag2(1,4-bis(2-methyl-imidazole-1yl)butane)Br2]n or [Ag2(1,4-bis(2-methyl-imidazole-1yl)butane)I2]n crystal material that is stable and high in luminous efficiency is prepared by means of coordination between 1,4-bis(2-methyl-imidazole-1-yl)butane and silver halide through a mild hydrothermal process. Through X-ray single crystal diffraction, X-ray powder diffraction, infrared absorption spectrum, thermogravimetric curve, excitation spectrum, emission spectrum and the like, it is proved that the luminous crystal material has single crystal characteristics, thermal stability and efficient multicolor luminous characteristic. Two isostructural multicolor luminous fluorescent crystal materials obtained can emit bright light yellow and deep yellow beams when exposed to a handheld ultraviolet lamp at room temperature.

Description

technical field [0001] The invention relates to a high-efficiency inorganic-organic hybrid multicolor luminescent fluorescent crystal material and a preparation method thereof, especially a crystal luminescent material of an imidazole-silver complex and a preparation method thereof. Background technique [0002] With the depletion of fossil energy, the energy crisis is approaching. While developing renewable energy, improving the utilization rate of energy has also attracted great attention from all over the world. Currently, lighting and displays consume more than 50% of the world's electricity. In order to effectively improve energy utilization efficiency, high-efficiency luminescent materials with high energy conversion efficiency and can effectively avoid the high energy loss in conventional luminescent materials have attracted more and more attention from the scientific and commercial communities. To achieve a high quantum yield, the luminescent material must be able ...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07D233/61C07F1/10
CPCC09K11/06C07D233/61C07F1/005C07B2200/13C09K2211/188
Inventor 房贞兰杨丹丹徐文龙曹晓薇黄维
Owner NANJING UNIV OF TECH
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