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Visible light excited six-core tripolyphosphazene europium complex luminescent material and preparation method and application thereof

A technology for hexanuclear tripolyphosphazene and luminescent materials, which can be applied in the directions of luminescent materials, botanical equipment and methods, compounds of Group 5/15 elements of the periodic table, etc., and can solve the problems of narrow light response range and low luminescence performance. , to achieve the effect of broadening the excitation wavelength range, simple preparation steps, and expanding the scope of application

Active Publication Date: 2019-07-12
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a visible light-excited hexanuclear tripolyphosphazene europium complex luminescent material and its preparation method, which solves the problems of low luminescent performance and narrow photoresponse range of existing rare earth luminescent materials.

Method used

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  • Visible light excited six-core tripolyphosphazene europium complex luminescent material and preparation method and application thereof
  • Visible light excited six-core tripolyphosphazene europium complex luminescent material and preparation method and application thereof
  • Visible light excited six-core tripolyphosphazene europium complex luminescent material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1) Eu(TTA) 3 2H 2 Preparation of O: Add 2.20g (6mmol) EuCl to a 150mL single-necked flask successively 3 ·6H 2 O. Mix 6.67g (30mmol) 2-thienoyltrifluoroacetone (TTA) and 0.576g sodium hydroxide, then add 50mL of absolute ethanol and stir, heat up to 60°C, condense and reflux, and react at constant temperature for 20min. The resulting product was cooled to room temperature, filtered to obtain a large amount of precipitate, the precipitate was washed with deionized water, and then dried at 50°C for 12h to obtain Eu(TTA) 3 2H 2 O, its structural formula is as follows:

[0040]

[0041] 2) Hexanuclear tripolyphosphazene europium complex (Eu(TTA) 3 -CTP-TPY) preparation: 3.6g (4.2mmol) Eu(TTA) prepared in step 1) 3 2H 2O was dissolved in 60mL of THF, and then 1.46g (0.7mmol) of hexa(4-(terpyridyl)phenoxy)cyclotripolyphosphazene was added, stirred and heated to 66°C, kept at constant temperature for 3h, and cooled to At room temperature, through rotary evaporation ...

Embodiment 2

[0051] 1) Eu(TTA) 3 2H 2 Preparation of O: In a 150mL one-necked flask, add EuCl successively 3 ·6H 2 Mix O, 2-thienoyltrifluoroacetone (TTA) and sodium hydroxide, among them, EuCl 3 ·6H 2 The molar ratio of O and 2-thienoyltrifluoroacetone (TTA) is 1:4, then add 50mL of absolute ethanol and stir, heat up to 65°C, condense and reflux, react at constant temperature for 22min, and cool the obtained product to At room temperature, a large amount of precipitate was obtained by filtration, washed with deionized water, and then dried at 50°C for 12 hours to obtain Eu(TTA) 3 2H 2 O.

[0052] 2) Hexanuclear tripolyphosphazene europium complex (Eu(TTA) 3 -CTP-TPY) preparation: the Eu(TTA) prepared in step 1) 3 2H 2 O was dissolved in 60 mL of THF, and then hexa(4-(terpyridyl)phenoxy)cyclotrimeric phosphazene was added, and hexa(4-(terpyridyl)phenoxy)cyclotrimeric phosphazene and Eu( TTA) 3 2H 2 The molar ratio of O is 1:7, stir and raise the temperature to 66°C, keep the te...

Embodiment 3

[0054] 1) Eu(TTA) 3 2H 2 Preparation of O: In a 150mL one-necked flask, add EuCl successively 3 ·6H 2 Mix O, 2-thienoyltrifluoroacetone (TTA) and sodium hydroxide, among them, EuCl 3 ·6H 2 The molar ratio of O and 2-thienoyltrifluoroacetone (TTA) is 1:3.7, then add 50mL of absolute ethanol and stir, heat up to 70°C, condense and reflux, react at constant temperature for 25min, and cool the resulting product to At room temperature, a large amount of precipitate was obtained by filtration, washed with deionized water, and then dried at 50°C for 12 hours to obtain Eu(TTA) 3 2H 2 O.

[0055] 2) Hexanuclear tripolyphosphazene europium complex (Eu(TTA) 3 -CTP-TPY) preparation: the Eu(TTA) prepared in step 1) 3 2H 2 O was dissolved in 60 mL of THF, and then hexa(4-(terpyridyl)phenoxy)cyclotrimeric phosphazene was added, and hexa(4-(terpyridyl)phenoxy)cyclotrimeric phosphazene and Eu( TTA) 3 2H 2 The molar ratio of O is 1:9, stir and raise the temperature to 70°C, keep the...

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Abstract

The invention discloses an Eu(TTA)3-CTP-TPY complex luminescent material and a preparation method and application. A hexa(4-(terpyridyl)phenoxyl)cyclotripolyphosphazene ligand coordinates with six Eu<3+> luminescence centers simultaneously such that there exist up to six luminescence centers of rare earth complex in a luminescent molecule and 18 beta-diketone ligands (2-thenoyltrifluoroacetone) also exist in each luminescent molecule. Thus, the six-core tripolyphosphazene luminescent material has two ligands simultaneously, which greatly enhances energy transfer efficiency from the ligands tothe europium luminescence centers. And then, the material has more excellent luminescence property. When excited by visible light and ultraviolet light, the complex can produce red light, light response range of the rare earth luminescent material is expanded, and its application range is broadened. The preparation method of the invention has simple steps, is low-cost, has high efficiency, and isof great significance for development of a novel multi-core rare earth photoluminescence material.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to a hexanuclear tripolyphosphazene europium complex luminescent material excited by visible light and its preparation method and application. Background technique [0002] Rare earth elements have always been known as the "treasure house of new materials". my country is rich in rare earths, how to effectively use the existing rare earth resources is the direction of research and efforts of scientists all the time. In recent years, rare earth metal complexes have shown unique application potential in the fields of electronic fluorescence devices, lasers, and optical amplifiers due to their remarkable monochromaticity, long fluorescence lifetime, and potentially high quantum yield. [0003] The special electronic structure leads to the special luminescent properties of rare earth ions. The f-f transition of a single rare earth ion is a forbidden transition....

Claims

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Application Information

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IPC IPC(8): C07F9/6593C09K11/06C08L67/04C08K5/00C08J5/18A01G13/02
CPCA01G13/0275C07F9/65815C08J5/18C08J2367/04C08K5/0091C09K11/06C09K2211/182
Inventor 杨朝龙张丹张永锋王中豪贾鹏周倩
Owner CHONGQING UNIV OF TECH
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