A kind of double-arm benzoic acid organic rare earth high-efficiency light-emitting material and preparation method thereof

A benzoic acid, rare earth luminescence technology, applied in luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve problems such as the inability to meet application requirements, and achieve the effect of increasing fluorescence intensity and long fluorescence life.

Active Publication Date: 2019-11-22
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic rare earth complexes prepared by using general-purpose benzoic acid compounds, such as benzoic acid and its derivatives, terephthalic acid, etc., have certain shortcomings in fluorescence intensity and fluorescence lifetime, and cannot meet the needs of many applications.

Method used

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  • A kind of double-arm benzoic acid organic rare earth high-efficiency light-emitting material and preparation method thereof
  • A kind of double-arm benzoic acid organic rare earth high-efficiency light-emitting material and preparation method thereof
  • A kind of double-arm benzoic acid organic rare earth high-efficiency light-emitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Tb 2 (BCMT) 2 (H 2 O) 4

[0052] Weigh 0.01mol of 1,4-terephthalic acid diglycolate and add it to 40ml of a mixed solvent of ethanol and N,N-dimethylformamide (DMF) (the volume ratio of ethanol to DMF is 1:6 ), fully stirred at 25°C to form a uniform solution 1 (stirring speed was 20r / min). 0.01mol of TbCl 3 After adding to 8ml of ethanol and fully stirring at 25°C until transparent, it was added to solution 1. NH with stirring 3 ·H 2 O adjusted the pH of the mixed solution to be 7, and reacted at 40°C for 60 minutes to obtain solution 2. The solution 2 was heated to 70°C, reacted for 4 hours under the stirring condition of 25r / min, the reaction solution was cooled to room temperature, rotary evaporated, suction filtered, and the product was washed with deionized water and ethanol for 5 times to obtain a sample.

[0053] Such as image 3 and 4 As shown, the fluorescence intensity of the prepared rare earth terbium complex of 1,4-terephthalic acid d...

Embodiment 2

[0054] Example 2: Eu 2 (BCMT) 2 (1,10-Phenanthroline) 2

[0055] Weigh 0.01mol of 1,4-terephthalic acid diglycolate and add it to 60ml of a mixed solvent of ethanol and N,N-dimethylformamide (DMF) (the volume ratio of ethanol to DMF is 6:1 ), fully stirred at 70°C to form a uniform solution 1 (stirring speed is 80r / min). 0.01mol of EuCl 3 After adding to 12ml of ethanol and stirring well at 25°C until transparent, it was added to solution 1. NH with stirring 3 ·H 2 O adjusted the pH value of the mixed solution to be equal to 11, and obtained solution 2 after reacting at 70°C for 30 minutes. Weigh 0.01mol of 1,10-phenanthroline and add it to 8ml of ethanol, stir well at 30°C until it is transparent, then add it to solution 2, react at 60°C and 25r / min for 1 hour, The reaction solution was cooled to room temperature, rotary evaporated, suction filtered, and the product was washed with deionized water and ethanol for 5 times to obtain a sample.

[0056] Such as Figure ...

Embodiment 3

[0057] Example 3: Eu 2 (BCMT) 2 (2-Thienoyltrifluoroacetone) 2

[0058] Weigh 0.01mol of 1,4-terephthalic acid diglycolic acid ester and add it to the mixed solvent of 50ml of ethanol and N,N-dimethylformamide (DMF) (the volume ratio of ethanol and DMF is 1:1 ), fully stirred at 50°C to form a uniform solution 1 (stirring speed was 60r / min). 0.01mol of Eu(NO 3 ) 3 After adding to 10 ml of ethanol and stirring well at 25°C until transparent, it was added to solution 1. NH with stirring 3 ·H 2 O adjusted the pH value of the mixed solution to be equal to 8, and obtained solution 2 after reacting at 50° C. for 45 minutes. Weigh 0.01mol of 2-thienoyltrifluoroacetone and add it to 10ml of ethanol at 50°C until fully stirred until transparent, then add it to solution 2, react at 65°C and 30r / min for 2.5 hours, then react The solution was cooled to room temperature, rotary evaporated, suction filtered, and the product was washed 5 times with deionized water, ethanol and other...

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Abstract

A dual-arm benzoic-acid organic rare-earth efficient luminescent material and a preparation method thereof are disclosed, the structural formula is Ln2 (BCMT) 2 (H2O) 4-2n (L2) n. 1,4-ethylene glycol terephthalate is added into a mixed solvent of ethanol and N, N-dimethylformamide or a mixed solvent of ethanol and dimethylsulfoxide for stirring into a homogeneous solution 1; LnCl3 or Ln (NO3) 3 is added into ethanol to obtain a LnCl3 or Ln (NO3) 3 ethanol solution, the LnCl3 or Ln (NO3) 3 ethanol solution is added into the solution 1 to obtain a reaction solution 2; L2 is added into ethanol to obtain a L2 ethanol solution, the L2 ethanol solution is stirred until the solution is transparent, the transparent L2 ethanol solution is added into the reaction solution 2 for reaction, and then the dual-arm benzoic-acid organic rare-earth efficient luminescent material is obtained by cooling, suction filtration and washing. In the long arm benzoic-acid organic rare-earth efficient luminescent material, the molecular structure comprises a flexible bond C-O bond, so that ligand-terminal-COOH has better coordination space with rare earth ions, meanwhile by ester group mutual coordinating role, a prepared organic rare earth complex has a more excellent large flat molecular structure, high fluorescence intensity and long fluorescence lifetime.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and relates to a double-arm benzoic acid organic rare earth high-efficiency luminescent material and a preparation method thereof. Background technique [0002] Due to their excellent outer electron shell structure, rare earth ions can be excited in different external environments to produce characteristic emission spectra of rare earth ions, and show better color purity. Among rare earth ions, trivalent europium, terbium, samarium and dysprosium all have good luminescent potential, especially europium and terbium ions can produce narrow fluorescence emission bands, showing bright red and green light, and are used as It is an important luminescent material for trichromatic light sources and has a relatively important application prospect. [0003] But the f-f transition of pure rare earth ions is forbidden, so rare earth ions need to be coordinated with ligands with bett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06
Inventor 西鹏夏磊程博闻夏海影高利王超华
Owner TIANJIN POLYTECHNIC UNIV
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