Rare earth terbium complex and preparation method thereof

Abstract

The invention discloses a preparation method of a composite rare earth complex, which comprises the steps of weighing an inorganic alkaline matter, adding a polar solvent, performing dispersion, adding rare earth salt and ligand, performing a reaction under stirring, performing filtering, obtaining the composite rare earth complex, optionally performing drying, and obtaining the composite rare earth complex. According to the method, the composite rare earth complex is successfully synthesized and extracted in the polar solvent by using the inorganic alkaline matter for a rare earth binary complex which is difficultly deposited in the polar solvent, so that the difficult-to-deposit rare earth binary complex is effectively deposited out, and the cost of a rare earth fluorescent material is lowered.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and relates to a novel composite luminescent material, in particular to a composite rare earth complex with an inorganic base as the inner core and a rare earth complex on the outer layer and a preparation method thereof. Background technique [0002] Rare earth complexes, as a kind of luminescent material, are widely used in luminescent display, fluorescent probe, anti-counterfeiting and other fields due to their characteristics of narrow emission peak, high quantum efficiency, and the emission peak position does not move with the change of ligand. [0003] However, due to the rising price of rare earths, the application of rare earth complexes in some fields has been limited. Some methods have been reported in the literature to improve the luminescent properties of rare earth complexes, such as the use of rare earth terbium doped alumina fibers in patent CN 102504817 A,...

AI Technical Summary

Problems solved by technology

However, the adsorption force of the rare earth complex on the surface of nano-silica is relatively weak, and it is easy to detach and re-aggregate during the processing of the material.

Although silica-coated rare earth complexes can effectively reduce costs, they are not suitable for all rare earth complexes, because most of the rare earth complexes have undergone decomposition reactions during the hydrolysis of ethyl orthosilicate

[0004] On the other hand, some rare earth complexes are difficult to precipitate due to their high solubility in polar solvents

In order to appear precipitation, some in the prior art use a second ligand, but due to the introduction of the second ligand, the fluorescence performance of the rare earth complex is reduced

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