Rare earth/ionic liquid luminescent soft material and preparation method thereof

An ionic liquid, rare earth ion technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low doping concentration and poor luminescence performance, achieve good solubility, avoid pollution, improve luminescence lifetime and quantum efficiency. Effect

Inactive Publication Date: 2009-12-23
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rare earth / ionic liquid light-emitting soft material and a preparation method thereof for the current rare earth / ionic liquid materials, which have the disadvantages of low doping concentration of rare earth compounds and poor luminescent performance. Different carboxylic acid groups are grafted on the cationic alkyl side chain of the ionic liquid. Using this as a solvent can not only directly dissolve rare earth oxides, increase the doping concentration of rare earth ions, but also directly dissolve rare earth oxides that can sensitize rare earth luminescence. Solid organic ligands avoid the use of volatile organic solvents, thus providing a simple, efficient, and green process

Method used

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  • Rare earth/ionic liquid luminescent soft material and preparation method thereof
  • Rare earth/ionic liquid luminescent soft material and preparation method thereof
  • Rare earth/ionic liquid luminescent soft material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] ①, the Eu of 0.125mmoL 2 o 3 Added to 0.75mmoL ionic liquid (I) 1 Medium (R=4, X=Br, n=3, mp=104°C, IR(KBr) 1729, 1542cm -1 , molecular weight=277.16), add 7.5mL water, stir at 100°C until the rare earth oxide Eu 2 o 3 All, (at this time Eu 2 o 3 React with the carboxylic acid group on the alkyl side chain of the ionic liquid to generate carboxylate and water), remove water by rotary evaporation (until the quality does not change), and obtain an ionic liquid containing rare earth ions.

[0032] 2. The solid TTA and Phen mixture of 0.75mmoL total amount (molar ratio is TTA: Phen=3: 1) is directly added to the 0.2mmL ionic liquid containing rare earth obtained above (the molar number of the ionic liquid containing rare earth is expressed as rare earth ion content meter), stirred at 50°C for half an hour, and finally a transparent and viscous light yellow rare earth / ionic liquid soft material was obtained.

[0033] The luminescent properties of the material (such as...

Embodiment 2

[0041] The ionic liquid (I) 1 Change to ionic liquid (I) 2 (R=3, X=Br, n=2, molecular weight=249.36), and all the other conditions are the same as in Example 1.

[0042] The physical and chemical parameters of the material tested are as follows:

[0043] IR(KBr): 1602, 1542, 1310, 790, 585cm -1 .

[0044] Excitation spectrum (detection wavelength: 612nm): 250-450nm

[0045] Emission spectrum (excitation spectrum: 322nm): 612nm, 578nm, 592nm, 651nm, 700nm

[0046] Lifetime: 0.80ms

[0047] Quantum efficiency: 48.0%

Embodiment 3

[0049] The ionic liquid (I) 1 Change to ionic liquid (I) 3 (R=5, X=Br, n=4, molecular weight=305.16), and all the other conditions are the same as in Example 1.

[0050] The physical and chemical parameters of the material tested are as follows:

[0051] IR(KBr): 1602, 1542, 1310, 790, 585cm -1 .

[0052] Excitation spectrum (detection wavelength: 612nm): 250-450nm

[0053] Emission spectrum (excitation spectrum: 322nm): 612nm, 578nm, 592nm, 651nm, 700nm

[0054] Lifetime: 0.89ms

[0055] Quantum Efficiency: 49.0%

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Abstract

The invention relates to a rare earth / ionic liquid luminescent soft material and a preparation method thereof, belonging to the field of rare-earth functional materials. The luminescent soft material comprises the components of ionic liquid, rare-earth ions and organic ligand which have the mole ratio of 1:3:1.5-6; wherein the ionic liquid is ionic liquid (I) or ionic liquid (II) which has the above structural formula, wherein X=Br, (OTf), BF4, PF6 or NTf2; in the (I), R is alkyl containing 2-6 carbons, and n=2-5; in the (II), n1=2-5, and n2=2-5; the rare-earth ions are Nd, Sm, Eu, Gd, Ho, Er, Yb, Tm or Dy; and the organic ligand is one or a mixture of two in Bipy, Bath, Phen, TTA, PM, PT, PC and PF. The rare earth compound / ionic liquid material has rich luminescent colors, high color purity, long fluorescence service life, high quantum efficiency as well as strong heat stability and light stability, so as to be an optical soft material of great value, thus being widely applied to the fields such as display, optical waveguide amplification, solid-state lasers, medical science, biological marker, anti-counterfeit technology, etc.

Description

Technical field: [0001] The invention belongs to the field of rare earth functional materials, in particular to a rare earth / ionic liquid luminescent soft material and a preparation method thereof. Background technique [0002] Ionic liquids are considered to be the most promising solvents in green chemistry and cleaning processes because of their non-volatility, wide liquid range, high electrical conductivity, high thermal stability, and adjustable properties. Most ionic liquids have no color and are optically transparent in the entire visible and ultraviolet regions. This excellent property combined with their high stability makes ionic liquids especially suitable for optical solvents. Due to the unique electron configuration of the 4f layer, rare earth ions have excellent luminescent properties (such as high color purity, long fluorescence lifetime, rich emission lines, etc.), and are widely used in displays, optical waveguide amplification, solid-state lasers, medicine, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/07
Inventor 李焕荣王弋戈邵惠芳刘鹏陈玉焕
Owner HEBEI UNIV OF TECH
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