A double rare earth eu 3+ /tb 3+ Nano-l-type Zeolite Luminescent Material of -β-diketone Complex and Its Application

Abstract

The invention relates to a nano L-type zeolite light-emitting material containing a double-rare-earth Eu<3+> / Tb<3+>-beta-dione complex and application thereof. The light-emitting material is composed of L-type nano zeolite and a light-emitting rare-earth organic complex loaded on the L-type nano zeolite, wherein the rare earth ion Ln<3+> accounts for 3-4 wt% of the light-emitting material, and the organic ligand accounts for 3.5-4.5 wt% of the light-emitting material. The average particle size of the nano zeolite is 50-100nm. The organic ligand is acetylacetone. The Ln<3+> is Eu<3+> and Tb<3+> in a ratio of 3:7-7:3. The type of the solvent can be distinguished according to the light-emitting color of the zeolite light-emitting material fumigated by the solvent under an ultraviolet lamp, i.e. the type of the solvent is an amine solvent, polar solvent or nonpolar solvent. When the solvent is an amine solvent, the specific type of the solvent can be distinguished according to the fluorescence intensity ratio.

Description

technical field [0001] The invention relates to a double rare earth Eu 3+ / Tb 3+ - β-diketone complex nanometer L-type zeolite (referred to as zeolite luminescent material) and its detection and identification of amine solvents and its detection method for the classification of organic solvents with different properties. technical background [0002] Volatile organic solvents are widely used in the fields of industrial and agricultural production, medicine and scientific research, but they can cause harm to the human body through the nervous, respiratory, cardiovascular, skin and blood systems and tissues, so the qualitative analysis of organic solvents And quantitative detection is of great significance. The traditional determination methods of volatile organic solvents are mainly spectrophotometry and chromatography. This method has the advantages of accurate detection results and high precision, but it often requires special instruments and well-trained professional te...

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Problems solved by technology

For example, there have been many researches on porous lanthanide-metal organic framework materials (LnMOFs) for the detection of volatile organic solvents, but there are few reports on the use of zeolite fluorescent hybrid materials for the detection of volatile organic solvents.

[0004] L-type zeolites are composed of SiO 4 and AlO 4 The porous material composed of tetrahedrons has a high specific surface area and several c-axis one-dimensional parallel nanopores, and various cations and neutral molecules can enter the pores of zeolites. Due to these unique properties, zeolites are useful in catalysis, separation and There are very important applications in ion exchange and other aspects; rare earth organic complexes have the advantages of strong light absorption ability, narrow emission spectrum band, high color purity, bright colors, etc., but due to the instability of rare earth organic complexes to light and heat , so its potential application value has not been fully utilized. However, the inorganic matrix of zeolite molecular sieves usually has good light, heat and chemical stability. Or the preparation of new rare earth / zeolite host-guest functional materials in cages can not only maintain its excellent luminescent properties, but also have some outstanding advantages due to the space constraints of nanopores or cages and the protection of zeolite rigid framework. For example, with porous structure and excellent luminescent properties, it has potential application value in gas detection, but there are few reports in this area.

[0005] The material mentioned in the previously reported article contains a rare earth ion Eu 3+ NZ-Eu 3+ -TTA zeolite luminescent material (Li, P.; Zhang, Y.; Wang, Y.; Wang, Y.; Li, H, Luminescent europium(III)–β-diketonate complexes hosted in nanozeolite L as turn-on sensors for detecting basic molecules.Chem.Commun.2014,50,13680), the composition of the material contains a rare earth ion Eu 3+ And the organic ligand 2-thienoyl trifluoroacetone (TTA), the application of this material can only be used for the detection of basic molecules

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