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Cross-linkable metallorganic macromolecular complex electroluminescent material and its making method

A metal-organic and polymer technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as phase separation and performance impact

Inactive Publication Date: 2005-01-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking rare earth organic complexes as an example, as early as the early 1960s, there was a method of doping rare earth complexes into polymers, but due to the problem of phase separation in doping, its performance was affected.

Method used

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  • Cross-linkable metallorganic macromolecular complex electroluminescent material and its making method
  • Cross-linkable metallorganic macromolecular complex electroluminescent material and its making method
  • Cross-linkable metallorganic macromolecular complex electroluminescent material and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Select 5,5'-dibromo-2,2'bipyridine, 2,5-di-{6-[1-(3-methyl-oxabutan)yl-methoxy]-hexyloxy }-1,4-diboronic acid benzene as starting material, in Pd(PPh) 3 Suzuki reaction was carried out as a catalyst at a temperature of 90°C to prepare a random copolymer with a yield of about 78%. The ratio of copolymerized units m1:m2=1:1, the degree of polymerization n is about 20. Further with EuCl 3 Coordination was performed and the coordination number was saturated by the addition of dibenzoylmethanone (DBM) (compound I, structure shown below). The Eu polymer complex with this structure emits bright red light with a wavelength of 612nm detected by fluorescence spectroscopy.

[0024]

[0025]Compound I

Embodiment 2

[0027] Select 5,5'-dibromo-2,2'bipyridine, 9,9'-dioctyl-2,7-dibromofluorene, and 2,5-di-{6-[1-(3-methyl Base-oxabutanyl-methoxy]-hexyloxy}-1,4-diboronic acid benzene as starting material, in Pd(PPh) 3 Suzuki reaction was carried out as a catalyst at a temperature of 90°C to prepare a random copolymer with a yield of about 80%. The ratio of copolymerized units m1:m2:m3=1:1:4, the degree of polymerization n is about 12. Further with EuCl 3 Coordination was performed and the coordination number was saturated by the addition of dibenzoylmethanone (DBM) (compound II, structure shown below). The Eu polymer complex with this structure emits bright red light with a wavelength of 612nm detected by fluorescence spectroscopy. Compared with compound I, its luminescence intensity increased by about 30%.

[0028]

[0029] Compound II

Embodiment 3

[0031] Select tetrameric (2,2'-bipyridine-2,5-dioctyloxybenzene) (the terminal group is methoxy) as the starting material, and use the two-step reduction of methoxy to hydroxyl and hydroxyl Alkylation, synthesize bipyridine-benzene alternating oligomers (n=3) with epoxy groups at both ends, and after coordination reaction with europium chloride, add dibenzoyl ketone (DBM) to make rare earth The coordination numbers of the ions are saturated to give compound III. The Eu polymer complex with this structure emits bright red light with a wavelength of 613nm detected by fluorescence spectroscopy. Compared with similar Eu polymer complexes without epoxy groups, there is no difference, indicating that the crosslinking group has no obvious influence on the complexes. The synthetic steps of compound III are shown below.

[0032]

[0033] Compound III

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Abstract

The invention discloses a cross-linkable metallorganic macromolecular complex electroluminescent material and its making method which consists of, synthesizing conjugated ligand oligomer with active terminated radicals and conjugated oligomer with active terminated radicals, forming fully conjugated long chain structure through coupling reaction, introducing crosslinkable groups onto two ends of the chains, carrying out coordination reaction with metallic ion and second ligand metallic ion.

Description

technical field [0001] The invention belongs to the technical field of electroluminescence materials, and in particular relates to a novel electroluminescence material of a metal organic polymer complex and a preparation method thereof. Background technique [0002] As we all know, metal-organic complexes are an important class of electroluminescent materials. It is mainly composed of ligands and central ions. According to the different luminescence mechanism, that is, ligand luminescence and central ion luminescence, metal-organic complexes can be divided into three categories: main chain metal-organic complexes, transition metal-organic complexes and rare earth metal-organic complexes. [0003] In 1987, C.W.Tang and others successfully developed an organic light-emitting diode (OLED), using aniline-TPD as the hole transport layer (HTL), and aluminum and octahydroxyquinoline complex-ALQ as the light-emitting layer (EML). Its working voltage is less than 10V, and its brigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/07
Inventor 黄维温贵安冯嘉春赵雷袁翔东忻愉
Owner FUDAN UNIV
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