The Preparation And Characterization Of Fluorescent Molecules With Multi-amide Groups

It is generally believed that the typical organic fluorescent molecule electronic double bond has rigid structure and the domain of conjugate system, the existence of aromatic ring or conjugated unsaturated group that is beneficial to improve the efficiency of fluorescence and resulting in a strong fluorescence. But in recent years, researchers have found that some nitrogen dendritic polymers which simply contain simple functional groups such as primary amine, secondary amine and tertiary amine and amide etc. has fluorescence.Nitrogen dendritic polymers are atypical fluorescent chromophores, their fluorescent properties and biological applications received wide attention quickly, but as a result of the polymers containing nitrogen system is relatively complex, fluorescent center structure and its position, function is difficult to determine, causing more factors affecting the structure of the fluorescence properties, therefore in nitrogen dendritic polymer light-emitting mechanism research is relatively difficult. Compared with polymers containing nitrogen, nitrogen kind of small molecular compound system is relatively simple, diversity of preparation methods, the molecular structure is simple, which is advantageous for the system research diversified product structure and luminescence mechanism of carboxylic acids and amino reagent, the corresponding relationship between luminous performance, is conducive to clear fluorescence radiation center, further in-depth study of nitrogen fluorescent light-emitting mechanism of small molecules. Due to the small molecules of nitrogen name need unified structure is simple, less influence factors. Fluorescence of nitrogen with clear and simple structure of small molecules, found that no matter from the aspects of theoretical calculation and experiment for the final explore nitrogenous organic molecules luminescent mechanism provides a effective way.In this paper, the specific research work are as follows:1, Using chloride preparation of fluorescence multiple amide, explore the suitable reaction conditions; With two carboxyl of sulfoxide chloride activation of organic acid, and then react with organic amine to the reaction course, make the carboxyl and amino through simple small molecules to generate amide functional group reaction.2, Change the structure of carboxylic acid, explore the effect of carboxylic acid structure to when zi chan rate of multiple amide fluorescence.3, Changing the structure of the organic amine, organic amine to explore structure of multivariate amide fluorescence when zi chan rate;4, Change the amide fluorescent small molecule external conditions explore the influence of temperature, solvent, uv illumination time, ion and so on, to multiple quantity of amide fluorescence when zi chan rate.Some varieties of amide linkage fluorescent molecules, such as citric acid amide QY can be as high as 70.2%(quinine sulfate for reference), molecular volume is small, the fluorescence tracer, as has potential application. In addition reaction with polybasic acid such as amino reagent contains other functional groups(such as alkoxy), is conducive to further build the multipurpose composite materials. Above all, a preliminary study results show that this molecular is expected to be of a kind of new type of luminescence materials which also provide effective support for the research of new luminescence mechanism.