Preparation method and application of piezochromic material

A piezochromic, combined technology, applied in the chemical field, to achieve the effects of high luminous efficiency and high electroluminescence performance

Inactive Publication Date: 2014-08-06
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no piezochromism with high luminous efficiency, which can respond to the external pressure of 7.20GPa, has a large chan

Method used

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  • Preparation method and application of piezochromic material
  • Preparation method and application of piezochromic material
  • Preparation method and application of piezochromic material

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] refer to figure 1 , designed M1 to suppress the color-changing molecule. The final product was synthesized according to the Suzuki reaction. We have carried out a comprehensive characterization of intermediates and final products, including H-NMR, C-NMR, mass spectrometry, infrared, and elemental analysis. Proved that we got the target product.

[0024] 1: Aggregation-induced phenomenon

[0025] Depend on figure 2 You can see the ultraviolet absorption spectrum of M1 tetrahydrofuran dilute solution. The absorption peak at 261nm is attributed to the absorption of the isolated benzene ring connected with phenanthroimidazole. The broad absorption peaks at 340nm and 360nm are attributed to the π-π* transitions of phenanthroimidazole and tetraphenylethylene.

[0026] Depend on image 3 It can be s...

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Abstract

The invention discloses a preparation method and application of a piezochromic material, and the gather induction properties and the amplified spontaneous emission properties of the material are studied. A high-efficiency electroluminescent device is prepared; the novel piezochromic material is high in light-emitting efficiency of nearly 100%; the material can respond to the external pressure of 7.20 GPa, the light-emitting peak can be moved to 530 nm from 467 nm, and the change of light color and luminous intensity is larger; the pressure and the peak change form a good linear relation, and the piezochromic material is reversible and loss-free; the crystals of the material have the amplified spontaneous emission properties, the half-peak width of a spectrum is reduced to 10 nm from 41 nm along with the increment of pump energy, the spectral intensity is nonlinearly changed along with the increment of pump energy, and the threshold value is 2086 Kw*cm<-2>. The material is applied to organic electroluminescence devices, high-efficiency electroluminescence performance can be obtained, and the obtained maximum current efficiency is 3.13 cd/A.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and relates to a piezochromic material and its preparation method and application. Background technique [0002] Materials responsive to external stimuli are of great interest. Stress is one of the important stimuli. Materials that exhibit different luminous colors and light and dark intensities under different pressures are commonly known as piezochromism. In the prior art, there is no piezochromism with high luminous efficiency, which can respond to the external pressure of 7.20GPa, has a large change in light color and luminous intensity, a good linear relationship between pressure and peak position, and is reversible and lossless. Material. Contents of the invention [0003] In order to overcome the defects in the prior art, the invention provides a piezochromic material and its preparation method and application, and studies the aggregation-inducing properties and amplified self-emiss...

Claims

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Application Information

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IPC IPC(8): C09K9/02C09K11/06C07D235/02H01L51/54
Inventor 路萍高曌刘豫龙
Owner JILIN UNIV
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