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Controlled synthesis and fluorescence control of low-temperature white light rare earth-organic coordination polymers

A technology of coordination polymers and white light, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of difficult control of energy transfer and great influence of temperature on luminescence, and achieve a simple and fast synthesis method, low cost and high reliability. repetitive effect

Active Publication Date: 2020-02-07
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the luminescence of such mixed rare earth-organic coordination polymers is greatly affected by temperature.
However, this energy transfer is difficult to control, and the controllable design and synthesis of fluorescent tunable white light single host materials is still a challenge in the synthesis of materials.

Method used

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  • Controlled synthesis and fluorescence control of low-temperature white light rare earth-organic coordination polymers
  • Controlled synthesis and fluorescence control of low-temperature white light rare earth-organic coordination polymers
  • Controlled synthesis and fluorescence control of low-temperature white light rare earth-organic coordination polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Low temperature white light mixed rare earth-organic coordination polymer (Eu 0.0667 Tb 0.0667 Dy 0.8666 )(HL)(H 2 Synthesis of O)(DEF)

[0026] Ligands were weighed P -terphenyl-2,2̎,4,4̎-tetracarboxylic acid (H 4 L) 40 mg, rare earth salt Eu 2 (SO 4 ) 3 . 8H 2 O 5mg, Tb 2 (SO 4 ) 3 . 8H 2 O 5 mg, Dy 2 (SO 4 ) 3 . 8H 2 O 65 mg in a glass bottle with a volume of 15 ml, to this mixture was added 4 ml of N,N-diethylformamide (DEF) and 4 ml of distilled water. After ultrasonication for 15 minutes and mixing evenly, the glass bottle containing the reaction substance was placed in an oven at 85°C for 4 days. After four days, it was taken out and cooled down to room temperature naturally, and a yellow diamond-shaped transparent crystal was obtained. Rinse the crystals with distilled water, collect the crystals, and dry them at room temperature.

Embodiment 2

[0028] Low temperature white light mixed rare earth-organic coordination polymer (Eu 0.0666 Tb 0.4667 Dy 0.4667 )(HL)(H 2 Synthesis of O)(DEF)

[0029] Ligands were weighed P -terphenyl-2,2̎,4,4̎-tetracarboxylic acid (H 4 L) 40 mg, rare earth salt Eu 2 (SO 4 ) 3 . 8H 2 O 5mg, Tb 2 (SO 4 ) 3 . 8H 2 O 35 mg, Dy 2 (SO 4 ) 3 . 8H 2 O 35 mg in a glass bottle with a volume of 15 ml, to this mixture was added 4 ml of N,N-diethylformamide (DEF) and 4 ml of distilled water. After ultrasonication for 15 minutes and mixing evenly, the glass bottle containing the reaction substance was placed in an oven at 85°C for 4 days. After four days, it was taken out and cooled down to room temperature naturally, and a yellow diamond-shaped transparent crystal was obtained. Rinse the crystals with distilled water, collect the crystals, and dry them at room temperature.

Embodiment 3

[0031] Low temperature white light mixed rare earth-organic coordination polymer (Eu 0.0667 Tb 0.0667 Dy 0.8666 )(HL)(H 2 O)(DEF) and (Eu 0.0666 Tb 0.4667 Dy 0.4667 )(HL)(H 2 O) Eu in (DEF) 3+ , Tb 3+ , and Dy 3+ Determination of metal content

[0032] The content of rare earth ions in the mixed rare earth-organic coordination polymer is to use the Ultima2 inductively coupled plasma atomic emission spectrometer of Jobin Yvon Company to measure the content of rare earth ions in two kinds of mixed rare earth-organic coordination polymers, which are respectively:

[0033] (Eu 0.0667 Tb 0.0667 Dy 0.8666 )(HL)(H 2 O)(DEF):Eu 3+ , 2.04%; 3+ , 2.64%; and Dy 3+ ,19.27%.

[0034] (Eu 0.0666 Tb 0.4667 Dy 0.4667 )(HL)(H 2 O)(DEF):Eu 3+ , 2.54%; 3+ , 10.68%; and Dy 3+ ,11.19%.

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Abstract

The invention discloses a preparation method of a low-temperature white-light rare earth-organic coordination polymer. The preparation method comprises the following steps: weighing a ligand P-terphenyl-2,2'',4,4''-tetracarboxylic acid (H4L), a rare earth salt Eu2(SO4)3.8H2O, a rare earth salt Tb2(SO4)3.8H2O and a rare earth salt Dy2(SO4)3.8H2O respectively and adding into a glass bottle, wherein the mass ratio of the four components is 8 to 1 to 1 to 7; adding N,N-diethylformamide and distilled water into a mixture; after uniformly mixing by ultrasounds, putting the glass bottle into a drying oven and reacting at 85 DEG C for 4 days; taking out the glass bottle and naturally cooling to room temperature to obtain a yellow rhombus-shaped transparent crystal; washing the crystal with the distilled water and collecting the crystal; airing at room temperature to obtain the low-temperature white-light rare earth-organic coordination polymer. Meanwhile, the invention further discloses fluorescence regulation and control of the low-temperature white-light rare earth-organic coordination polymer. A synthesis method of the compound, provided by the invention, is simple and the compound is simple in structure and can be stored and preserved in the air for a long period.

Description

technical field [0001] The invention belongs to the field of high-molecular polymers, and in particular relates to the regulation and synthesis of two low-temperature white light mixed-rare earth coordination polymers and their fluorescence regulation. Background technique [0002] Tunable luminescent substances have a wide range of applications in the fields of display devices and full-color display devices. Among them, the white light material is a traditional lighting source material. Traditional white light luminescent materials are mixtures of different luminescent substances (such as red light, green light, and blue light). Compared with traditional white light materials, the white light materials formed by embedding various light-emitting units into a single host have significantly improved stability, repeatability and synthesis efficiency. The luminescence of lanthanides has the characteristics of narrow emission band, long luminescence lifetime, and large Stokes s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/182
Inventor 盖艳丽孟庆华韩京郑维维李晨媛陈燕李鑫
Owner XUZHOU NORMAL UNIVERSITY