A kind of organic blue luminescent material zinc complex and preparation method thereof
A technology of blue light-emitting materials and zinc complexes, applied in light-emitting materials, zinc organic compounds, chemical instruments and methods, etc., can solve the problems of high cost and expensive raw materials, and achieve the effect of stabilizing blue light-emitting properties
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specific Embodiment approach 1
[0017] Specific implementation mode 1: The molecular formula of an organic blue light-emitting material zinc complex of this embodiment is C 16 H 22 N 8 O 8 Zn.
[0018] The zinc complex of an organic blue light-emitting material of this embodiment contains a Zn in its basic structural unit 2+ Ion, two N-acetoxy-2,2'-biimidazole ligands and two coordinated water molecules. The central metal zinc ion presents a six-coordinate octahedral configuration. Among them, the central metal zinc ion and the four nitrogen atoms N1, N1A, N3, N3A from two N-acetoxy-2,2'-biimidazoles and the two coordination oxygen atoms O3 in the two coordination water molecules , O3A coordinates to form a bond. Adjacent basic structural units form a three-dimensional supramolecular structure through face-to-face π-π stacking and strong hydrogen bonding. The minimum distance between π-π stacking layers is
specific Embodiment approach 2
[0019] Embodiment 2: The method for preparing an organic blue light-emitting material zinc complex of this embodiment is carried out in the following steps:
[0020] 1. Preparation of N-acetoxy-2,2'-biimidazole: After mixing 2,2'-biimidazole, ethyl bromoacetate, sodium hydroxide and N,N-dimethylformamide, at a temperature of 40 React at ~70℃ for 10h~20h, then wash the mixture with distilled water, filter to retain the solid powder, and finally use ethyl acetate as a solvent to recrystallize the retained solid powder to obtain N-acetoxy-2,2'- Biimidazole; wherein the molar ratio of 2,2'-biimidazole and ethyl bromoacetate is 1:(0.5~3), and the molar ratio of 2,2'-biimidazole and sodium hydroxide is 1 : (0.5~3), the ratio of the mass of 2,2'-biimidazole to the volume of N,N-dimethylformamide is 1.34g:(20~60)mL;
[0021] 2. Add the N-acetoxy-2,2'-biimidazole and zinc acetate of step one to distilled water, stir at room temperature until the mixture is uniform, then adjust the pH value...
specific Embodiment approach 3
[0023] Specific embodiment three: This embodiment is different from specific embodiment two in that in step 1, after 2,2'-biimidazole, ethyl bromoacetate, sodium hydroxide and N,N-dimethylformamide are mixed, The reaction is carried out at a temperature of 50-60°C for 15h-20h, and other steps and parameters are the same as in the second embodiment.
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