Tridentate [ONO] tungsten coordination compound and optical application thereof

Abstract

The invention provides a tridentate [ONO] tungsten coordination compound and optical application thereof, and the tridentate [ONO] tungsten coordination compound is divided into but not limited to three structures, namely a structure I, a structure II and a structure III, the synthesis method of the tridentate tungsten coordination compound mainly comprises the following steps: mixing different equal amounts of tridentate [ONO] phenol imine compounds serving as ligands with dichlorotungsten dioxide and 2.2-3 times of pyridine, and carrying out reflux reaction at 115-135 DEG C for at least 24 hours by taking methylbenzene as a solvent, so as to obtain the tridentate [ONO] tungsten coordination compound. The tridentate [ONO] tungsten coordination compound is synthesized by using different tridentate [ONO] phenol imine compounds as ligands, tungsten dioxide dichloride and pyridine, the ligands are subjected to configuration torsion after optical excitation, and when metal tungsten is added to form a metal-ligand coordination bond, the configuration torsion of the ligands is limited, the energy relaxation is reduced, the ligand red shift is obvious, and the light is enhancedl; the tridentate [ONO] tungsten coordination compound can be used as a light-emitting material; and meanwhile, the synthesized complex has chirality, so that the synthesized complex can be used as a circular polarization luminescent material for practical application.

Description

technical field [0001] The invention belongs to the technical field of synthesis of metal organic tungsten complexes, and in particular relates to a tridentate [ONO] tungsten coordination compound and its optical application. Background technique [0002] Tungsten is a metallic element. The atomic number is 74, and the relative atomic mass is 183.85. It is located in the sixth period (the second longest period) of the periodic table of elements, group VIB. Its main valence state is +6, and its ionic radius is 0.68×10 -10 m. As the country with the richest tungsten resources in the world, my country's annual output, reserves, and export volume of tungsten are all in the forefront of the world, and it has an important position in the international market. The research on metal W(Ⅵ) complexes is a relatively new field at present, and its main applications are in fluorescent probes, oxygen sensing, OLEDs and photocatalysis. [0003] Although tungsten has been used in incande...

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Problems solved by technology

[0003] Although tungsten has been used in incandescent light bulbs for decades, there are not many reports of complexes with electroluminescence

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