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A fluorescent material with high thermal stability and stable to organic solvents

A high thermal stability, organic solvent technology, applied in the field of fluorescent materials, can solve the problems of limited application, metal-organic framework thermal stability and solvent stability, instability, etc., to achieve simple preparation method, easy implementation, good solvent stability sexual effect

Inactive Publication Date: 2016-03-23
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, a large number of fluorescent rare-earth metal-organic frameworks have been synthesized and reported, but due to the poor thermal and solvent stability of metal-organic frameworks, they are unstable in air, which limits their applications.

Method used

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  • A fluorescent material with high thermal stability and stable to organic solvents
  • A fluorescent material with high thermal stability and stable to organic solvents
  • A fluorescent material with high thermal stability and stable to organic solvents

Examples

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Embodiment 1

[0023] A fluorescent material with high thermal stability and stable to organic solvents, the basic unit chemical formula is Ln 2 (OBA) 3 (DMA) 2 (H 2 O) 2 , where: Ln is Eu, OBA is 4,4'-diphenyl ether diformate ion, DMA is N,N-dimethylacetamide; the fluorescent material is a metal-organic framework structure, and there is a metal-organic framework Crystallographically independent rare earth ions Eu 3+ or Tb 3+ , Two adjacent independent rare earth ions are bridged by ligands to form a binuclear unit, and the binuclear units are then cross-linked by organic ligands to form a three-dimensional network structure.

[0024] The preparation method of the fluorescent material with high thermal stability and stable to organic solvents comprises the following steps:

[0025] 1) Add 4,4'-diphenyl ether dicarboxylic acid, europium nitrate hexahydrate, and 4,4'-bipyridine into distilled water and DMA, mix well to obtain a mixed solution, 4,4'-diphenyl ether dicarboxylic acid, hexah...

Embodiment 2

[0029] A fluorescent material with high thermal stability and stability to organic solvents, the structural characteristics and preparation method are basically the same as in Example 1, the difference is that in the chemical formula, Ln is Tb, and in the preparation method, terbium nitrate hexahydrate is used to replace nitric acid hexahydrate Europium, the prepared fluorescent material is numbered as (2).

[0030] figure 1 is the single crystal diffraction structure diagram of the fluorescent material, wherein: (a) is the metal Ln in the metal organic framework material 3+ The coordination environment diagram of ; (b) is the three-dimensional structure diagram of the metal organic framework material in the crystallographic b direction.

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Abstract

A fluorescent material with high thermal stability and stable to organic solvent has a basic unit chemical formula of [Ln2(OBA)3(DMA)2(H2O)2]n, wherein Ln is Eu or Tb, OBA is 4,4'-diphenyl ether dioctyl phthalate ions, DMA is N,N-dimethyl acetamide, n is a natural number from 1 to the infinite. The fluorescent material has a metal organic framework structure, the metal organic framework structure has a crystallographically independent rare earth ion Eu<3+> or Tb<3+>, two adjacent independent rare earth ions are bridged into a dinuclear unit through ligand, and the dinuclear units are connected in cross by organic ligand to form a three-dimensional network structure. The invention has the advantage the fluorescent material has good solvent and thermal stability, is conducive to the practical application of the identification of small organic molecules by fluorescence. The preparation method of the fluorescent material is simple and easy to implement, and has significant technical effect and application value.

Description

technical field [0001] The invention relates to the technical field of metal organic framework materials, in particular to fluorescent materials with high thermal stability and stability to organic solvents. Background technique [0002] In recent years, metal-organic frameworks have received more and more attention as a new type of material for gas storage and capture, see: [1] LiJR, KupplerRJ, ZhouH.C.Selectivegasadsorptionandseparationinmetal–organicframeworks[J].Chem.Soc .Rev.,2009,38,1477-1504; [2]McDonaldTM, LeeWR, MasonJA., WiersBM, HongCS, LongJR..CaptureofCarbonDioxidefromAirandFlueGasintheAlkylamine-AppendedMetal–OrganicFrameworkmmen-Mg 2 (dobpdc)[J].J.Am.Chem.Soc.,2012,134,7056-7065; -835. Chemical catalysis, see: [4] MaL, CarterAl, LinW. Enantioselectivecatalysiswithhomochiralmetal–organicframeworks [J]. NquyenST,HuppJT.Metal–organicframeworkmaterialsascatalysts[J].Chem.Soc.Rev.,2009,38,1450-1459;[6]WangC,WangJL,LinW.B.ElucidatingMolecularIridiumWaterOxidationC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C07F5/00G01N21/64
Inventor 程鹏何艳飞师唯
Owner NANKAI UNIV
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