Nitrogen-containing bidentate heterocyclic substituted tetrazole rare earth complex and preparation method thereof

Abstract

The invention provides a nitrogen-containing double-tooth heterocyclic ring substituted tetrazole type rare-earth complex LnL3 expressed by the formula I, wherein Ar is a nitrogen-containing double-tooth heterocyclic ring; the center rare-earth ion Ln is any one of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium. The preparation method of the nitrogen-containing double-tooth heterocyclic ring substituted tetrazole type rare-earth complex LnL3 is characterized in that a nitrogen-containing double-tooth heterocyclic ring substituted tetrazole type three-tooth compound, namely a dipyridyl tetrazole type three-tooth compound or phenanthroline tetrazole type three-tooth compound, is taken as a single ligand, and simultaneously, coordination saturation is satisfied, and the tetrazole group in the complex serves as negative irons to realize electrically neutral charge balance together with center rare-earth metal cations. The obtained rare-earth complex is high in thermal stability, can be prepared into a device through an evaporation film-forming process or a solution film-forming process. Besides, the preparation method has the advantages of high yield, of the product has high purity, reaction time is short and operation is simple; and as a result, the cost is greatly reduced.

Description

Technical field: [0001] The invention relates to a synthesis method of a novel nitrogen-containing bidentate heterocyclic substituted tetrazole ligand and a rare earth complex thereof. Background technique: [0002] my country has a unique resource advantage for the development of rare earth applications. Among the world's rare earth resources that have been identified, 80% (36-37%, WIKI) of rare earth resources are in my country, and the variety is complete. In order to protect resources and avoid environmental problems caused by over-exploitation, my country began to control the export of rare earth ores in 2009, but was protested by countries such as the United States, Japan and Europe. This reflects the preciousness of rare earth resources and the necessity and urgency of vigorously developing rare earth deep processing from another angle. In view of my country's rich and distinctive rare earth resources, when my country's rare earth industry urgently needs to transform...

AI Technical Summary

Problems solved by technology

[0007] Up to now, no new rare earth luminescent complexes suitable for practical applications, even for OLED display and lighting technology have been reported.

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