The Studies On The Optical Properties Of8-hydroxyquinoline And O-hydroxyacetophenone Schiff-base Derivatives

8-hydroxyquinoline have good photochemical properties, especially when the5or7points reasonable modified by different substituent groups, its optical properties and chemical properties can be greatly improved. The5/7-substituted derivatives can bind with metal ions such as aluminum, zinc, magnesium, cadmium, etc., forming stable metal complexes with excellent optical properties, and can be widely used in the research and development of optical material, such as OLED and LED.5/7modified8-hydroxyquinoline, such as Schiff-base, etc., may provide the coordination sites by substituent groups, can also be achieved the selective recognition of the fluorescence of the metal ions in the environment and in-vivo. Magnesium ions are closely related to the human body and plant life activities, the excessive magnesium ions in organisms cause great harms, cause cardiovascular and cerebrovascular diseases, migraine headaches and other symptoms, serious damage to the health of the human body. Especially when too many or low magnesium ions in green plants, it will cause serious damage to the process of photosynthesis. Thus, the testing of the magnesium ions in the organisms and environmental is significant. Aluminum ions in the environment would cause serious damage to plants and fish. When too much of the aluminum contain in the human body, it will lead to the occurrence of the diseases. Due to its specific spatial structure and binding sites, o-hydroxyacetophenone Schiff-base derivatives can be effectively bound to aluminum ions and form stable aluminum coordination compounds, which exhibit great optical performance, can achieve the effective detection of the aluminum ions. So the researches on the optical properties of8-hydroxyquinoline and o-hydroxyacetophenone Schiff-base derivatives have important practical significance.In this paper, we design and synthesis a series of8-hydroxyquinoline-5/7-aldehyde and o-hydroxyacetophenone skeleton hydrazone and acylhydrazone derivatives.8-hydroxyquinoline-5/7-aldehyde-(tris (hydroxymethyl) aminomethane) hydrazone have good optical properties, exhibit great potential in luminescent material fields.8-hydroxyquinoline-5-aldehyde-benzotriazole hydrazone shows good selectivity and sensitivity to magnesium ion, and fluorescence mechanism can be clear explained by Photoinduced Electron Transfer (PET) mechanism.4-methoxy-o-hydroxyacetophenone-(4-aminoantipyrene) hydrazone,2, 6-dihydroxyacetophenone-(4-aminoantipyrene) hydrazone,2,4-dihydroxyphenyl formaldehyde-(4-aminoantipyrene) hydrazone can achieve the effective fluorescence detection of aluminum ion. By comparing the structure, we found that organic molecules having a similar structure of the o-hydroxyacetophenone can bind with aluminum ions effectively and exhibit excellent optical performance. This provides a new direction for the design of more effective aluminum ion fluorescent sensor.