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Rare earth coordination polymer phosphor suitable for emitting white light and preparation method thereof

A technology of coordination polymers and phosphors, which is applied in the field of fluorescent materials, can solve the problems of lack of red light, complex preparation process, limited application and development, etc., and achieve high luminous intensity, long fluorescent life, and excellent dispersion.

Active Publication Date: 2019-08-30
SHANGQIU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, benzimidazole dicarboxylic acid is a hydrophobic organic molecule, and the corresponding rare earth coordination polymers can usually only be prepared and used in an organic environment, causing environmental pollution to a large extent, which limits its practicability.
[0006] To sum up, although there have been a large number of reports on the preparation methods of rare earth white light phosphors, the rare earth white light phosphors prepared by these methods either seriously lack the red light part, which seriously affects the color rendering effect of white light; or belong to the sulfide system, Poor stability
In addition, some preparation processes are very complicated, require high-temperature reactions, and require extremely toxic organic reagents during the preparation process, which seriously pollutes the environment.
This will greatly limit its application and development

Method used

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  • Rare earth coordination polymer phosphor suitable for emitting white light and preparation method thereof
  • Rare earth coordination polymer phosphor suitable for emitting white light and preparation method thereof
  • Rare earth coordination polymer phosphor suitable for emitting white light and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] The rare earth coordination polymer phosphor Ln(Tb / Eu / Gd) / AMP / Cp in this embodiment is a white light rare earth coordination polymer phosphor with adenosine monophosphate (AMP) as the organic bridging ligand. Its preparation method is: use TbCl 3 Aqueous solution, EuCl 3 Aqueous solution and GdCl 3 Aqueous solution prepared as Tb 3+ 、Eu 3+ 、Gd 3+ An aqueous solution of rare earth metal ions with a molar ratio of 991:8:1. Add 10mL of rare earth metal ion aqueous solution to 10mL of adenosine monophosphate with a concentration of 10mM and ciprofloxacin (Cp) with a concentration of 2.5mM in the mixed aqueous solution, stir at room temperature for 4.5h, centrifuge at 7000rpm for 15min, and collect the precipitate . To remove unreacted reagents, the resulting white precipitate was washed three times with ultrapure water. Finally, the obtained precipitate is placed in an oven and dried at 85° C. to obtain a white light-emitting rare earth coordination polymer phosphor....

Embodiment 2

[0040] The rare earth coordination polymer phosphor Ln(Tb / Eu / Gd) / GMP / Cp in this embodiment is a white light rare earth coordination polymer phosphor with guanylic acid (GMP) as the organic bridging ligand. Its preparation method is: use TbCl 3 Aqueous solution, EuCl 3 Aqueous solution and GdCl 3 Aqueous solution prepared as Tb 3+ 、Eu 3+ 、Gd 3+ An aqueous solution of rare earth metal ions with a molar ratio of 991:8:1. Add 10mL of rare earth metal ion aqueous solution (concentration of 10mM to 15mM) into 10mL of mixed aqueous solution of guanylic acid (concentration of 10mM) and ciprofloxacin (concentration of 2.5mM), and stir at room temperature for 4.5h, 7000rpm Centrifuge for 15 min to collect the precipitate. To remove unreacted reagents, the resulting white precipitate was washed three times with ultrapure water. Finally, the obtained precipitate is placed in an oven and dried at 85° C. to obtain a white light-emitting rare earth coordination polymer phosphor.

[0...

Embodiment 3

[0044] The rare earth coordination polymer phosphor Ln(Tb / Eu / Gd) / ADP / Cp in this embodiment is a white light rare earth coordination polymer phosphor with adenosine diphosphate (ADP) as the organic bridging ligand. Its preparation method is: use TbCl 3 Aqueous solution, EuCl 3 Aqueous solution and GdCl 3 Aqueous solution prepared as Tb 3+ 、Eu 3+ 、Gd 3+ An aqueous solution of rare earth metal ions with a molar ratio of 991:8:1. Add 10 mL of rare earth metal ion aqueous solution to 10 mL of a mixed aqueous solution of adenosine diphosphate (concentration: 10 mM) and ciprofloxacin (concentration: 2.5 mM), stir at room temperature for 4.5 h, centrifuge at 7000 rpm for 15 min, and collect the precipitate. To remove unreacted reagents, the resulting white precipitate was washed three times with ultrapure water. Finally, the obtained precipitate is placed in an oven and dried at 85° C. to obtain a white light-emitting rare earth coordination polymer phosphor.

[0045] The prepa...

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Abstract

The invention relates to rare earth coordination polymer fluorescent powder suitable for emitting white light and a preparation method thereof. The preparation method comprises the step that ciprofloxacin, nucleotide and rare earth metal ions are used to generate a rare earth coordination polymer through self-assembling reaction, wherein the rare earth metal ions are one or several of terbium ions, europium ions and gadolinium ions. The preparation method disclosed by the invention has a concise reaction path and shorter reaction time, and avoids high-temperature reaction and poisonous chemical reagents. The rare earth coordination polymer fluorescent powder prepared through the preparation method has high light intensity and long fluorescent service life.

Description

technical field [0001] The invention relates to a method for preparing a rare earth coordination polymer fluorescent powder emitting white light, and belongs to the technical field of fluorescent materials. Background technique [0002] In the context of the current global energy shortage worries rising again, saving energy is a major issue we are facing now and in the future. As a semiconductor solid-state light-emitting device, white light-emitting diodes (Light Emitting Diodes, referred to as LEDs) have attracted much attention due to their advantages such as long life, high luminous efficiency, and low energy consumption. White LED is the fourth-generation new solid-state lighting source developed following fluorescent lamps, incandescent lamps and high-voltage lamps. It satisfies the current policies of energy saving, environmental protection and "green and low carbon" advocated by various countries. It is regarded as a green lighting source in the 21st century. It has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/182Y02B20/00
Inventor 刘保霞张海灵郝远强黄艳楷张付力申豪爽瞿鹏徐茂田
Owner SHANGQIU NORMAL UNIVERSITY
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