Metal organic framework material capable of emitting white light, and synthetic method and application thereof

Abstract

The invention relates to the technical field of light industrial and chemical materials, especially to a metal organic framework material capable of emitting white light, and a synthetic method and application thereof. The synthetic method comprises the following steps: step 1, preparation of an intermediate 2',5'-difluoro-[1,1':4',1''-terphenyl]-4,4''-dimethyl ester; step 2, preparation of an intermediate 2',5'-dimethylthio-[1,1':4',1''-terphenyl]-4,4''-dimethyl ester; step 3, preparation of a thioether functionalized ligand 2',5'-dimethylthio-[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid; step 4, synthesis of the metal organic framework material capable of emitting white light; and step 5, ultraviolet excitation. The prepared metal organic framework material capable of emitting white light is a colorless transparent rod-like crystal which can emit purely white light and has the advantages of great white light emitting intensity and stable luminescence properties.

Description

technical field [0001] The invention relates to the technical field of light industry and chemical materials, in particular to a metal organic framework material emitting white light and its synthesis method and application. Background technique [0002] In recent years, solid light-emitting diode materials (referred to as LED materials) have received widespread attention and research, because this material is a very good luminescent material with various luminous colors, and can be used for household lighting and electronic screen displays. However, White-emitting LED materials consisting of a single material are very rare. At present, fluorescent lamps containing mercury vapor have become the most widely used white light lighting source. However, since mercury is a volatile and highly toxic heavy metal, it is very easy to pollute soil, water and air after being discarded. Therefore, the prior art The extensive use of such white-emitting fluorescent lamps will inevitably p...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned prior art, Sun et al. pass [Ir(ppy) 2 (bpy)] + Ions are loaded into the pores of metal organic framework materials to obtain new composite MOF materials, and the obtained new composite MOF materials can only emit white light under ultraviolet light excitation. This preparation method has the disadvantage of complicated process, and, because of this new The composite MOF material is composed of two materials, not a single material. Therefore, although the composite MOF material prepared by the prior art can emit white light under the excitation of ultraviolet light, the intensity of white light emission is not large enough. , The luminous performance is not stable enough, and it is difficult to adjust the luminosity.

In addition, based on the three-color principle, Tang et al. from Northeast Normal University synthesized a mixed metal-coordinated white light-emitting MOF material by doping three materials that emit blue, green, and red light in proportion. This method also There is a disadvantage of complex process, and the MOF materials that emit white light based on the three-color principle also have the disadvantages of insufficient intensity of white light emission, insufficient stability of luminous performance, and difficulty in adjusting luminosity.

Images