Preparation method for novel rare-earth fluorescent gel adopting PVA as main body and application thereof

A rare earth and gel technology, applied in the field of rare earth polymer composite luminescent materials, achieves the effects of good chemical stability, improved fluorescence intensity and good biocompatibility

Inactive Publication Date: 2015-12-09
CHONGQING UNIV OF TECH
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Problems solved by technology

[0004] At present, rare earth fluorescent gels based on PVA as the main body have hardly been reported. The rare earth fluorescent gel based on PVA as the main body we reported fully combines the superior fluorescence properties of rare earth complexes with the good biocompatibility and low toxicity of the PVA host. and other advantages, it has broad application prospects in biomaterials, medical treatment, agriculture, food and other fields

Method used

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  • Preparation method for novel rare-earth fluorescent gel adopting PVA as main body and application thereof
  • Preparation method for novel rare-earth fluorescent gel adopting PVA as main body and application thereof
  • Preparation method for novel rare-earth fluorescent gel adopting PVA as main body and application thereof

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Embodiment 1

[0041] Example 1: Rare Earth Terbium Complex Tb(ACAC) 3 2H 2 The preparation method of O comprises the steps:

[0042] First weigh 3.03g (30mmol) acetylacetone and add it into a 100ml three-necked flask, then add 50ml of THF to dissolve it, and the water bath is heated to 65 , add dropwise 2.83g of TbCl that has been dissolved in 20ml of absolute ethanol 3 ·6H 2 O (10mmol), 65 Continue to react for 4h, add an appropriate amount of NaOH aqueous solution to adjust the pH value to neutrality during the reaction, and remove the solvent by rotary distillation after the reaction is completed. The solid product obtained is rinsed with an appropriate amount of distilled water and dehydrated alcohol for about three times respectively, and finally 4g light yellow product ( Tb(ACAC) 3 2H 2 O), its productive rate 80.8%.

[0043] From figure 2 As can be seen in the terbium complex Tb(ACAC) 3 2H 2 The main absorption peak of O is at 293nm. The peak here mainly reflects the ...

Embodiment 6

[0047] Embodiment 6: The preparation method of fluorescent gel, adopts the rare earth terbium complex Tb(ACAC) prepared in embodiment 1-5 3 2H 2 O as a luminescent molecule, and then the rare earth terbium complex Tb(ACAC) 3 2H 2 O was introduced into the PVA matrix to form a fluorescent gel under the action of a crosslinker.

[0048] Weigh 0.5g PVA, 0.05g boric acid (dissolve with appropriate amount of deionized water after weighing), 0.007g NaOH (dissolve with appropriate amount of deionized water after weighing), and 0.015g terbium complex (dissolve with appropriate amount of DMF). Then measure 4.5ml of deionized water in a 5ml round bottom flask, and the water bath is heated to 90 Add the weighed polyvinyl alcohol and stir to dissolve. When the PVA is completely dissolved, add the boric acid solution. When the solution is evenly mixed, add the terbium complex solution (the mass ratio to PVA is 3%). After mixing evenly, pour the NaOH solution. After cooling, the PVA fl...

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Abstract

The invention relates to preparation methods for a rare-earth terbium complex and rare-earth terbium complex fluorescent gel. The method comprises the steps: firstly synthesizing the rare-earth terbium complex, i.e., Tb(ACAC)3.2H2O which serves as luminescent molecules; and then, introducing the rare-earth terbium complex into a PVA matrix, and forming the fluorescent gel in the presence of a cross-linking agent. According to the preparation method for the fluorescent gel, high rare-earth doping concentration can be obtained, and the fluorescence intensity is improved. The preparation method is simple, is high in operability and short in reaction time, is environment-friendly and is applicable to industrial production. Compared with the traditional products, the product prepared by the preparation method has the advantages of good biocompatibility, degradability, low toxicity, good chemical stability and the like and has a broad application prospect in the fields of biomaterials, medical treatment, agriculture, food and the like.

Description

[0001] The invention relates to the technical field of rare earth polymer composite luminescent materials, in particular to a preparation method of a rare earth terbium complex and fluorescent gel with PVA as the main body. Background technique [0002] Rare earth is a new type of functional material with optical, magnetic, electrical and biological properties. Rare earth ions have unique luminescent properties due to the unique structure of their 4f electron shells. These unique luminescent properties make rare earth compounds widely used in medical treatment, biological imaging, optical fibers, lighting devices, etc. Rare earth complexes are obtained by coordination and bonding of ligands and rare earth ions. The principle of luminescence is that the ligand absorbs energy in the ultraviolet region, and then the ligand transfers the energy of its excited state to the rare earth ion in the form of intramolecular energy transfer. The emission levels cause the rare earth ions to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06C08L29/04C08K5/00C08J3/24
Inventor 杨朝龙何键李又兵邹丹丹王选伦王国霞高宝
Owner CHONGQING UNIV OF TECH
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