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Hydrogel-based solid-state up-conversion luminescence material and preparation method thereof

A luminescent material and hydrogel technology, applied in the field of nonlinear optical materials, can solve the problem of low quantum yield of solid-state up-conversion materials and achieve high stability

Active Publication Date: 2016-06-22
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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  • Hydrogel-based solid-state up-conversion luminescence material and preparation method thereof
  • Hydrogel-based solid-state up-conversion luminescence material and preparation method thereof
  • Hydrogel-based solid-state up-conversion luminescence material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of PdTPP / DPA upconversion material based on polyacrylic acid hydrogel

[0026] The metalloporphyrin complex used in the photosensitizer in this embodiment is PdTPP, and the molecular structure is:

[0027]

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

[0029]

[0030] Preparation of polyacrylic acid hydrogel: add sodium hydroxide (2.32g) into a beaker containing 30mL of distilled water, stir with a glass rod until it is uniformly dissolved, slowly add acrylic acid (5mL) in an ice water bath, and then add the initiator ( KPS, 0.015g), crosslinking agent (BIS, 0.0013g), stir and mix well. Heat in a constant temperature water bath at 60°C for 3 hours, take out the translucent elastic solid, take a proper amount of the solid and soak in a beaker of distilled water after cooling, and finally obtain a porous polyacrylic acid hydrogel by the PIT method.

[0031] Under a nit...

Embodiment 2

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

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

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

[0037] Under a nitrogen atmosphere, add the surfactant Tween-20 (10mL) to deionized water (20mL), stir to completely dissolve, and then add the luminescent agent DPA (36mM)...

Embodiment 3

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

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

[0040] Preparation of sodium polyacrylate hydrogel: add sodium hydroxide (2.32g) into a beaker containing 30mL of distilled water, stir with a glass rod until it is uniformly dissolved, slowly add sodium acrylate (5g) in an ice water bath, and then add the initiator (KPS, 0.015g), crosslinking agent (BIS, 0.0013g), stir and mix well. Heat in a constant temperature water bath at 50°C for 3 hours, take out the translucent elastic solid, take a proper amount of solid and soak in a beaker of distilled water after cooling, and finally obtain porous polyacrylic acid sodium hydrogel by PIT method.

[0041] Under a nitrogen atmosphere, add the surfactant Tween-80 (8mL) to deionized water (18mL), stir to completely dissolve, and then add the luminescent agent DPA (36mM) and p...

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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 specifically relates to a novel solid up-conversion material containing a photosensitizer and a luminescent agent using a hydrogel as a carrier. Background technique [0002] Upconversion is a process in which organic molecules absorb low-energy light and then emit high-energy light. Two-Photon-Absorption Upconversion (TPA-UC) and Triplet-Triplet-AnnihilationUpconversion (TTA-UC) are currently two important up-conversion technologies, and both show non- Linear optical characteristics. [0003] TPA up-conversion refers to a process in which a two-photon electron transfers energy to a ground-state molecule under the irradiation of an excitation light at a low-energy-level electronic ground-state molecule, so that the molecule reaches a high-energy-level excited state, decays back to the ground state through radiation, and emits high-frequency fluorescence. However, the up-conversion techno...

Claims

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Application Information

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Patent Type & Authority Applications(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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