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A kind of hydrogel-based solid-state up-conversion luminescent material and preparation method thereof

A luminescent material and hydrogel technology, applied in the field of nonlinear optical materials, can solve the problems of low quantum yield of solid-state up-conversion materials, achieve stable up-conversion efficiency, no need to isolate air, and simple, practical and convenient preparation

Active Publication Date: 2018-10-23
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quantum yield of solid-state up-conversion materials obtained by these methods is low, so it is of great application significance to prepare new high-efficiency solid-state up-conversion materials, effectively avoid oxygen quenching, and broaden their practical applications in atmospheric environments.

Method used

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  • A kind of hydrogel-based solid-state up-conversion luminescent material and preparation method thereof
  • A kind of hydrogel-based solid-state up-conversion luminescent material and preparation method thereof
  • A kind of hydrogel-based solid-state up-conversion luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of PdTPP / DPA up-conversion material based on polyacrylic acid hydrogel

[0026] The metal porphyrin complex that is used for photosensitizer in the present embodiment is PdTPP, and molecular structural formula is:

[0027]

[0028] The fused-ring aromatic hydrocarbon used in the luminescent agent in this embodiment is DPA, and the molecular structural formula is:

[0029]

[0030] Preparation of polyacrylic acid hydrogel: Add sodium hydroxide (2.32 g) into a beaker containing 30 mL of distilled water, stir it with a glass rod until it dissolves evenly, slowly add acrylic acid (5 mL) in an ice-water bath, and then add the initiator ( KPS, 0.015g), cross-linking agent (BIS, 0.0013g), stir and mix well. Heating in a constant temperature water bath at 60°C for 3 hours, taking out the translucent elastic solid, taking an appropriate amount of the solid after cooling and soaking it in a beaker of distilled water, and finally obtaining a porous pol...

Embodiment 2

[0034] Example 2 Preparation of PdTPP / DPA up-conversion material based on polymethacrylic acid hydrogel

[0035] The photosensitizer and luminescent agent used in this embodiment are the same as those in Embodiment 1.

[0036] Preparation of polymethacrylic acid hydrogel: Add sodium hydroxide (2.32 g) into a beaker containing 30 mL of distilled water, stir with a glass rod until it dissolves evenly, slowly add methacrylic acid (5 mL) in an ice-water bath, and then Add initiator (KPS, 0.015g), crosslinking agent (BIS, 0.0013g), stir and mix well. Heating in a constant temperature water bath at 50°C for 3 hours, taking out the translucent elastic solid, taking an appropriate amount of the solid after cooling and soaking it in a beaker of distilled water, and finally obtaining a porous polyacrylic acid hydrogel by the PIT method.

[0037] Under nitrogen atmosphere, add surfactant Tween-20 (10mL) into deionized water (20mL), stir to dissolve it completely, then add dissolved lumi...

Embodiment 3

[0038] Example 3 Preparation of PdTPP / DPA up-conversion material based on sodium polyacrylate hydrogel

[0039] The photosensitizer and luminescent agent used in this embodiment are the same as those in Embodiment 1.

[0040] Preparation of sodium polyacrylate hydrogel: Add sodium hydroxide (2.32g) into a beaker filled with 30mL distilled water, stir with a glass rod until it dissolves evenly, slowly add sodium acrylate (5g) in an ice-water bath, and then add trigger Agent (KPS, 0.015g), crosslinking agent (BIS, 0.0013g), stir and mix well. Heating in a constant temperature water bath at 50°C for 3 hours, taking out the translucent elastic solid, taking an appropriate amount of the solid after cooling and soaking it in a beaker of distilled water, and finally obtaining a porous polyacrylic acid nanohydrogel by the PIT method.

[0041] Under a nitrogen atmosphere, add the surfactant Tween-80 (8 mL) into deionized water (18 mL), stir to dissolve it completely, then add the lumi...

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Abstract

The invention belongs to the field of nonlinear optical materials, and particularly discloses a hydrogel-based solid-state up-conversion luminescence material and a preparation method thereof.The material can be directly used in atmospheric environment and has quite high stability.The method includes: under excitation of low-power-density green light (532 nm, 60 mW.cm-2), enabling up-conversion hydrogel on a PdTPP / DPA system to obtain blue up-conversion luminescence.When temperature is increased, up-conversion efficiency (phiUC)of the material is in positive correlation with temperature and is up to 12%.A convenient and quick idea is provided for preparing up-conversion luminescence materials, and deoxidization is not needed, so that instability in organic solvents, complexity of organic synthesis methods and unfavorable effect on ecological environment protection are avoided usually, and actual application value is increased greatly.The material has potential application value in photoelectrochemical hydrogen generation and in the fields of solar photovoltaic field, solar photocatalysis, environment photochemical technology and temperature sensors.

Description

technical field [0001] The invention belongs to the field of nonlinear optical materials, and in particular relates to a novel solid-state up-conversion material which uses hydrogel as a carrier and contains a photosensitizer and a luminescent agent. Background technique [0002] Upconversion is the process by which organic molecules absorb low-energy light and emit high-energy light. Two-Photon-Absorption Upconversion (TPA-UC) and Triplet-Triplet-Annihilation Upconversion (TTA-UC) are currently two important upconversion technologies, and both Displays nonlinear optical properties. [0003] TPA up-conversion refers to the process in which the electronic ground state molecule at a low energy level is irradiated by excitation light, and two photons transfer energy to the ground state molecule, so that the molecule reaches a high energy level excited state, returns to the ground state through radiative decay, and emits high-frequency fluorescence. However, the up-conversion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02
CPCC09K11/025C09K11/06C09K2211/1007C09K2211/1011C09K2211/1055C09K2211/185
Inventor 叶常青汪彩虹陈硕然葛婕马金锁王筱梅周宇扬
Owner SUZHOU UNIV OF SCI & TECH
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