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Er(III) luminescent material containing mixed ligand of phenanthroline, modified imidazolecarboxylic acid and pyridine carboxylic acid and preparation method

A technology of o-phenanthroline and luminescent materials, applied in luminescent materials, chemical instruments and methods, organic chemical methods, etc., can solve problems such as difficult assembly of devices and unclear structure-activity relationship, and achieve easy operation and increased fluorescence efficiency , good crystallinity effect

Pending Publication Date: 2019-07-23
LUOYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another example is a long afterglow up-conversion phosphor Zn disclosed in the prior art. 3 Ga 2 GeO8:Cr 3+ ,Yb 3+ ,Er 3+ , this phosphor is excited at 980nm, and the emission peak is at 700nm, but these doped materials are not easy to assemble devices, and the structure-activity relationship is not clear, and the quaternary compound near-infrared light-emitting materials with clear molecular structure and composition are still rare reports

Method used

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  • Er(III) luminescent material containing mixed ligand of phenanthroline, modified imidazolecarboxylic acid and pyridine carboxylic acid and preparation method
  • Er(III) luminescent material containing mixed ligand of phenanthroline, modified imidazolecarboxylic acid and pyridine carboxylic acid and preparation method
  • Er(III) luminescent material containing mixed ligand of phenanthroline, modified imidazolecarboxylic acid and pyridine carboxylic acid and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Add 2,6-lutidine-3,5-dicarboxylic acid, phenanthroline and 1-H-2-propyl-4,5-imidazoledicarboxylic acid into distilled water, stir to dissolve and add dilute The pH of the glacial acetic acid solution was adjusted to be 4.5 to obtain an organic ligand solution for subsequent use;

[0029] In the step a, 2,6-lutidine-3,5-dicarboxylic acid, o-phenanthroline and 1-H-2-propyl-4, the molar ratio of the addition of 5-imidazole dicarboxylic acid is :1:0.5:1.

[0030] b. Add the organic ligand solution to the mixture of water and organic solvent, and then add Er 2 o 3 , stir under normal temperature and pressure to obtain the precursor solution, and set aside;

[0031] The volume ratio of water and organic solvent in the mixed solution of water and organic solvent is 1:10, and the organic solvent is ethanol.

[0032] Add 1molEr per 1mol2,6-lutidine-3,5-dicarboxylic acid in the step b 2 o 3 .

[0033] c. Move the precursor solution to a polytetrafluoroethylene-lined hyd...

Embodiment 2

[0042] a. Add 2,6-lutidine-3,5-dicarboxylic acid, phenanthroline and 1-H-2-propyl-4,5-imidazoledicarboxylic acid into distilled water, stir to dissolve and add dilute The pH of the glacial acetic acid solution was adjusted to 3.0 to obtain an organic ligand solution for subsequent use;

[0043] In the step a, 2,6-lutidine-3,5-dicarboxylic acid, o-phenanthroline and 1-H-2-propyl-4, the molar ratio of the addition of 5-imidazole dicarboxylic acid is :1:1:0.5.

[0044] b. Add the organic ligand solution to the mixture of water and organic solvent, then add Er(NO 3 ) 3 ·6H 2 O, stir under normal temperature and pressure to obtain the precursor solution, for subsequent use;

[0045] The volume ratio of water and organic solvent in the mixed solution of water and organic solvent is 1:4, and the organic solvent is DMSO.

[0046] Add 0.8molEr(NO 3 ) 3 ·6H 2 O.

[0047] c. Move the precursor liquid to a polytetrafluoroethylene-lined hydrothermal reaction kettle, seal it in a s...

Embodiment 3

[0049] a. Add 2,6-lutidine-3,5-dicarboxylic acid, phenanthroline and 1-H-2-propyl-4,5-imidazoledicarboxylic acid into distilled water, stir to dissolve and add dilute The pH of the glacial acetic acid solution was adjusted to 3.0 to obtain an organic ligand solution for subsequent use;

[0050] In the step a, 2,6-lutidine-3,5-dicarboxylic acid, o-phenanthroline and 1-H-2-propyl-4, the molar ratio of the addition of 5-imidazole dicarboxylic acid is :2:1:1.

[0051] b. Add the organic ligand solution to the mixture of water and organic solvent, then add Er(NO 3 ) 3 ·6H 2 O, stir under normal temperature and pressure to obtain the precursor solution, for subsequent use;

[0052] The volume ratio of water and organic solvent in the mixed solution of water and organic solvent is 1:6, and the organic solvent is DMF.

[0053] Add 1.2molEr(CH 3 COO) 3 ·5H 2 O.

[0054] c. Move the precursor solution to a polytetrafluoroethylene-lined hydrothermal reaction kettle, seal it in a...

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Abstract

The invention relates to an Er(III) luminescent material containing a mixed ligand of phenanthroline, modified imidazolecarboxylic acid and pyridine carboxylic acid and a preparation method. The molecular formula of the luminescent material is {Er2(dpda)2(Hpimda)phen.H2O].0.5phen}n, n is greater than 1, wherein a ligand H2dpda is 2,6-dimethyl pyridine-3,5-dioctyl phthalate, H3pimda is 1-H-2-propyl-4,5-imidazole dicarboxylic acid, phen is phenanthroline, a complex crystal belongs to a triclinic system, and a space group is p-1; in cell parameters, a is equal to 8.5811(3) angstroms, b is equal to 15.7987(8) angstroms, c is equal to 18.0740(9) angstroms, alpha is equal to 113.357(5) degrees, beta is equal to 97.903(4) degrees, gamma is equal to 104.086(3) degrees, V is equal to 2181.61(19) angstrom<3>; the luminescent material can be excited by near ultraviolet to emit near infrared fluorescence. The preparation method of the luminescent material involved in the invention is simple, the conditions are mild, and the product yield is relatively high; by introduction of multiple conjugate ligands, electron transfer among electron donors and receptors is adjusted and enhanced; the crystallinity is relatively good, no toxicity and pollution are caused, the heat stability is high, the luminescent property is excellent, the raw material cost is low, a preparation process and equipment are simple, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to Er(III) luminescent materials containing o-phenanthroline, modified imidazole carboxylic acid and pyridine carboxylic acid mixed ligands and a preparation method. Background technique [0002] Currently for trivalent lanthanide ions Ln 3+ There are many studies on the luminescence and application of compounds in the visible region. These studies are relatively in-depth and mature, but the research on near-infrared (NIR) luminescent rare earth complexes is still in the preliminary stage. Near-infrared luminescent materials have a wide range of applications in clinical disease inspection, photosensitive amplifiers, nonlinear optical materials, information security displays, target detection, pollutant ion detection, and dye-sensitized solar cells. ln 3+ The spectral range of near-infrared luminescence is between 800-1700nm. It has the characteristics of h...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06
CPCC07F5/003C09K11/06C07B2200/13C09K2211/182C09K2211/1029C09K2211/1044
Inventor 冯勋李俊霞陈海鹏杜正好张道铭李荣芳马录芳
Owner LUOYANG NORMAL UNIV
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