A tetrameric crystal of 8-hydroxyquinoline-like erbium complexes with near-infrared luminescent properties and its preparation method and application

Abstract

The invention discloses an 8-hydroxyquinoline erbium complex tetrameric crystal with a near-infrared luminescent property, a preparation method and an application thereof. The crystal adopts erbium asa metal center, and is coordinated with ligand H2L-Br to obtain a cubane crystal with a tetrameric structure, and the molecular formula of the cubane crystal is Er4(H2L-Br)4(MeOH)(DMF)3(H2O)4. The 8-hydroxyquinoline erbium complex tetrameric crystal, the preparation method and the application disclosed by the invention have the beneficial effects that the tetrameric crystal adopting the erbium asthe metal center is successfully prepared, the luminescent wavelength of the tetrameric crystal is positioned in a near-infrared area, and the tetrameric crystal has the double functions of up-conversion luminescence and near-infrared luminescence and as well as higher luminescent intensity, antiferromagnetism and good heat stability and can be assembled into a single-layer luminescent device; inaddition, the preparation method is simplified in process, simple in equipment and low in production cost, can realize large-scale production, and has good commercial application value and wide development prospect in the application aspects of preparation of luminescent materials or magnetic-function materials and the like.

Description

technical field [0001] The invention belongs to the technical field of organometallic complexes. More specifically, it relates to a tetramer crystal of 8-hydroxyquinoline-like erbium complexes with near-infrared luminescent properties and its preparation method and application. Background technique [0002] Rare earths are China's superior strategic resources. They have a very wide application value in high-tech fields such as information technology, energy, biomedicine, and national defense construction. They are known as "modern industrial vitamins". Because of its special 4f electron layer structure, it exhibits some special physical and chemical properties. Up-conversion luminescence is also called anti-Stokes luminescence. The absorbed photon energy is lower than the emitted photon energy, so that the infrared light invisible to the human eye can be transformed into visible light. Among them, some rare earth ions have near-infrared (750-1700nm) luminescence and up-con...

AI Technical Summary

Problems solved by technology

However, due to the high coordination number and general coordination behavior of rare earth metal ions, which makes the coordination shape of rare earth metal ions more difficult to control, there are relatively few structural units of rare earth complexes containing 8-hydroxyquinoline derivative cubane

[0004] The erbium element is [Xe]4f due to its electronic configuration 2 6s 2 , usually with a high coordination number and a large atomic radius, which makes it difficult to form complexes, and there are few studies on it at present

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