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Triplet state and triplet state annihilation up-conversion chemiluminescent system based on photonic crystal and preparation method thereof

A triplet annihilation and photonic crystal technology, applied in the field of nonlinear optical materials, can solve the problems of low quantum yield and limited practical application, and achieve the effect of simple preparation and improved up-conversion luminous efficiency

Inactive Publication Date: 2017-06-30
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in recent years, most of the TTA upconversion systems studied have low quantum yields, which greatly limits their practical applications. Therefore, improving the TTA upconversion luminous efficiency has become a technical problem that needs to be solved urgently.

Method used

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  • Triplet state and triplet state annihilation up-conversion chemiluminescent system based on photonic crystal and preparation method thereof
  • Triplet state and triplet state annihilation up-conversion chemiluminescent system based on photonic crystal and preparation method thereof
  • Triplet state and triplet state annihilation up-conversion chemiluminescent system based on photonic crystal and preparation method thereof

Examples

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preparation example Construction

[0043] Aiming at the triplet-triplet annihilation upconversion luminescence system as described above, the present invention also provides a preparation method of a triplet-triplet annihilation upconversion luminescence system based on photonic crystals, which is simple to prepare, does not require complicated processes, and is applicable It is strong, can obtain the luminescence of various up-conversion components, has high up-conversion efficiency, has high stability, is safe and environmentally friendly, and is suitable for industrial production. Described preparation method comprises the steps:

[0044] S1. Prepare up-conversion solution.

[0045] Wherein, when configuring the up-converting solution, a photosensitizer and an annihilation agent are provided, and the two are mixed in proportion to prepare an organic solution of the photosensitizer and annihilation agent.

[0046] S2. By vertical deposition method, monodisperse polymer latex microspheres are assembled on the...

Embodiment 1

[0057] In the present embodiment, photosensitizer adopts metal porphyrin complex PdOEP, and its molecular structural formula is:

[0058]

[0059] In this embodiment, the annihilation agent adopts condensed ring aromatic hydrocarbon AnCOOH, and its molecular structural formula is:

[0060]

[0061] The preparation of poly(styrene-methyl methacrylate-acrylic acid) photonic crystal film (band gap is 542nm): 1) glass sheet and beaker are immersed in chromic acid washing solution and cleaned overnight, then cleaned with ultrapure water, and washed with Blow dry with nitrogen to achieve complete hydrophilization and cleanliness of the surface; 2) The glass sheet is vertically fixed and immersed in a dispersion of monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex microspheres with a particle size of 255 nm. (mass concentration is about 0.15%) in a small beaker, placed in a constant temperature and humidity chamber with a temperature of 60 ° C and a humidity of ...

Embodiment 2

[0065] The photosensitizer and annihilation agent used in this example are the same as in Example 1.

[0066] The preparation of poly(styrene-methyl methacrylate-acrylic acid) photonic crystal film (band gap is 439nm): 1) soak the glass sheet and beaker in chromic acid washing solution to clean overnight, then clean with ultrapure water, and use Blow dry with nitrogen to achieve complete hydrophilization and cleaning of the surface; 2) The glass sheet is vertically fixed and immersed in a dispersion of monodisperse poly(styrene-methyl methacrylate-acrylic acid) latex microspheres with a particle size of 220 nm. (mass concentration is about 0.15%) in a small beaker, placed in a constant temperature and humidity chamber with a temperature of 60 ° C and a humidity of 60%, and after 2-3 days the solution evaporates, and the solution is deposited on the surface of the glass substrate by vertical deposition. Assembled into poly(styrene-methyl methacrylate-acrylic acid) colloidal pho...

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Abstract

The invention provides a triplet state and triplet state annihilation up-conversion chemiluminescent system based on a photonic crystal and a preparation method thereof. The triplet state and triplet state annihilation up-conversion chemiluminescent system comprises up-conversion solution and a photonic crystal film, wherein the up-conversion solution and the photonic crystal film interact according to the following mode that the up-conversion solution enters the photonic crystal film, so as to form a single layer mixed system, and enhances the up-conversion fluorescence of the up-conversion chemiluminescent system through the Bragg specular reflection effect of the photonic crystal film. The system has the advantages that the up-conversion solution enters the photonic crystal film to form a single layer mixed system, the low light up-conversion efficiency is improved through the Bragg specular reflection effect of the photonic crystal film, the problem of low luminous efficiency of a triplet state and triplet state annihilation up-conversion system in the prior art is solved, the up-conversion efficiency can reach 15 percent, and the system has obvious technical effect.

Description

technical field [0001] The invention relates to the technical field of nonlinear optical materials, in particular to a photonic crystal-based triplet-triplet annihilation upconversion luminescent system and a preparation method thereof. Background technique [0002] In photoluminescence, a phenomenon that converts long-wave radiation into short-wave radiation through a multiphoton mechanism, thereby realizing the conversion of low-energy light waves to high-energy light waves, is called up-conversion luminescence. [0003] There are many technologies to achieve upconversion, such as using dyes with a large two-photon absorption cross-section to achieve two-photon absorption upconversion, using rare earth materials to achieve upconversion of light wave frequency or based on triplet-triplet annihilation upconversion (Triplet-Triplet- Annihilation Upconversion (TTA-UC) is an important up-conversion technology at present, and all of them show nonlinear optical properties. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/06C30B19/06
CPCC09K11/025C09K11/06C09K2211/1011C09K2211/185C30B19/062
Inventor 叶常青马金锁葛婕陈硕然王筱梅
Owner SUZHOU UNIV OF SCI & TECH
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