A mechanical force-induced europium-coordinated red photopolymer film and its preparation method

A technology of polymer films and europium complexes, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of phase separation, low luminous efficiency, mismatched emission spectrum and ultraviolet absorption spectrum, etc. The effect of sensitivity

Active Publication Date: 2021-03-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its luminous wavelength is around 420nm, and its luminous efficiency is low, so it is not easy to be recognized and detected by human eyes and instruments.
The luminous wavelength can be adjusted by physically doping the energy transfer acceptor to enhance the luminous efficiency, but it is prone to phase separation and affects the mechanical properties of the composite film.
In addition, the emission spectrum of the force-responsive group does not match the UV absorption spectrum of the acceptor molecule, and efficient red light-emitting materials are not easy to obtain

Method used

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  • A mechanical force-induced europium-coordinated red photopolymer film and its preparation method
  • A mechanical force-induced europium-coordinated red photopolymer film and its preparation method
  • A mechanical force-induced europium-coordinated red photopolymer film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a europium-coordinated red photopolymer film induced by mechanical force, comprising the following steps:

[0043] (1) The complex Eu(TTA) of 30mg europium 3 (Aphen), 1mL of methyl acrylate, 6mg of azobisisobutyronitrile dissolved in 6mL of N,N-dimethylformamide, deoxygenated by freezing, heated and stirred at 60°C for 60h under the protection of argon, poured into methanol Settling to obtain linear polymethylacrylate (linear-Eu-1) containing europium complex;

[0044] (2) Dissolve 0.3 g of linear-Eu-1 obtained in step (1), 2 mL of methyl acrylate, 10 mg of bis-adamantane-substituted 1,2-dioxetane, and 10 mg of azobisisobutyronitrile in 1 mL of tetrahydrofuran, Stir well and pour into rectangular PTFE molds. Under the condition of argon protection, react at 55°C for 12h to obtain a uniform transparent polymer film, and vacuum dry at 60°C for 12h to obtain a mechanically induced europium-coordinated red photopolymer film (Eu-PMA-1).

[0045] fi...

Embodiment 2

[0051] A method for preparing a europium-coordinated red photopolymer film induced by mechanical force, comprising the following steps:

[0052] (1) The complex Eu(TTA) of 50mg europium 3 (Aphen), 1mL of methyl acrylate, 6mg of azobisisobutyronitrile dissolved in 6mL of N,N-dimethylformamide, deoxygenated by freezing, heated and stirred at 55°C for 60h under the protection of argon, poured into methanol Settling to obtain linear polymethylacrylate (linear-Eu-2) containing europium complex;

[0053] (2) Dissolve 0.3 g of linear-Eu-2 obtained in step (1), 2 mL of methyl acrylate, 10 mg of bis-adamantane-substituted 1,2-dioxetane, and 8 mg of azobisisobutyronitrile in 1 mL of tetrahydrofuran, Stir well and pour into rectangular PTFE molds. Under the condition of argon protection, react at 55°C for 15h to obtain a uniform transparent polymer film, and dry it in vacuum at 55°C for 24h to obtain a mechanically induced europium-coordinated red photopolymer film (Eu-PMA-2) .

[00...

Embodiment 3

[0057] A method for preparing a europium-coordinated red photopolymer film induced by mechanical force, comprising the following steps:

[0058] (1) The complex Eu(TTA) of 100mg europium 3 (Aphen), 1mL of methyl acrylate, 6mg of azobisisobutyronitrile dissolved in 6mL of N,N-dimethylformamide, deoxygenated by freezing, heated and stirred at 65°C for 50h under nitrogen protection, poured into methanol to settle , to obtain linear polymethylacrylate (linear-Eu-3) containing europium complex;

[0059] (2) 0.3 g of linear-Eu-3 obtained in step (1), 2 mL of methyl acrylate, 10 mg of bis-amantane-substituted 1,2-dioxetane, and 15 mg of azobisisobutyronitrile were dissolved in 1 mL of tetrahydrofuran, Stir well and pour into rectangular PTFE molds. Under the condition of nitrogen protection, react at 65°C for 12h to obtain a transparent polymer film with uniform texture, and dry it in vacuum at 65°C for 12h to obtain a mechanically induced europium-coordinated red photopolymer film...

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Abstract

The invention discloses a mechanical force induced europium coordinated red light polymer film and a preparation method thereof. The preparation method comprises following steps: (1) dissolving a europium coordination compound, methyl acrylate, and azodiisobutyronitrile into N,N-dimethyl formamide, heating and stirring N,N-dimethyl formamide in an argon atmosphere, pouring N,N-dimethyl formamide into methanol to carry out precipitation to obtain methyl polyacrylate containing a linear europium coordination compound; and (2) dissolving methyl polyacrylate containing a linear europium coordination compound, methyl acrylate, diadamantane substituted 1,2-dioxocyclobutane, and azodiisobutyronitrile into tetrahydrofuran, evenly mixing, pouring the mixture into a tetrafluorohydrazine die, carrying out reactions in an argon atmosphere to obtain a polymer film, and drying to obtain the mechanical force induced europium coordinated red light polymer film. The polymer film has a crosslinking structure, the europium coordination compound is used as an energy transfer acceptor; the light emitting strength is effectively increased during the polymer film breaking process, the light emitting color is changed; as the acceptor content is increased, the light emitting strength is increased; and thus the sensitivity for flaw detection of polymer materials is improved.

Description

technical field [0001] The invention relates to the field of mechanochemistry, in particular to a mechanically induced europium-coordinated red photopolymer film and a preparation method. Background technique [0002] Europium complexes are red fluorescent materials with excellent photophysical properties. It has the advantages of long luminescence lifetime, large Stokes shift, high fluorescence quantum yield and narrow half-peak width, etc., and is widely used in the fields of luminescent probes, biosensing, optical devices and so on. Covalently insert the europium complex into the polymer chain, and the obtained polymer europium complex has both the unique luminescence of the europium ion and the excellent film-forming and processing properties of the polymer, and can effectively avoid the complexes of the polymer and europium phase separation and concentration quenching of europium ions. [0003] In recent years, mechanically induced light-emitting polymers have become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/04C08F222/20C08F220/14C08F230/04C08J5/18C09K11/06
Inventor 陈于蓝杨帆
Owner TIANJIN UNIV
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