Studies On The Synthesis And Properties Of Conjugated Compounds Which Containing Triphenylamine

After the molecular structure absorbs the light of specific frequency, the electronic which is in ground state changes into excited state because of absorbing energy. When the electronic together with energy moves to the ground state, the excess energy will release in the form of light and heat. That is what fluorescent comes into being. Among the practical applications, the materials glowing by external stimulate are called luminescent substance. In the field of the luminescence, compared with Inorganic fluorescent material, the organic materials have more research value and a wide application range. The study of the organic fluorescence materials which has the advantage of the versatility has been one of the hot research topics in the research filed. Multiple atoms in the molecule Shared π electronic system is called the conjugate system. In this system, stimulate any atom, which would influence other atoms is called conjugative effect, the most familiar one are π-π conjugate and p-πconjugate. The π-π conjugate means π electron delocalization was triggered by the custom built appear alternately; The p-π conjugate means the delocalization between the π electron which in unsaturated bond and the p pathway which in atom. Conjugate system of has three benzene make high stability which attract more attention. On this basic, researcher attempt to introduce ethylenic bond to triphenylamine to change the length of conjugated bond, achieve the goal of the conjugated length change influence on photoelectric property. This technology has been applied in the fluorescent detection field. There is another report that the triphenylamine conjugated polymers by Witting method is applied in solar cells, the detection of explosive substances.This thesis mainly synthesized the molecules which contain TPA by Suzuki and Heck reactions. Further study of the physical properties of these materials and compare the difference between them. In this paper, the research is composed of the following two chapters:（1） Synthesized and Characterized the materials which contain TPA by ¹H NMR,13 C NMR, UV-vis and so on. The study founded that all molecules’ fluorescence could be enhanced along with increased of temperature, Through the test of spectrum,the study also founded that the increased poor solvents, the increased fluorescence intensity, is a strong AIE phenomenon.The study also founded that peripheralmolecules can take a difference to fluorescence intensity. Increased the conjugate system can increased the fluorescence, Meanwhile the more powerful of intramolecular- charge-transfer, the more fluorescence intensity.（2）The Synthesis of polyethylene glycol boronic ester（PEG-4-BTPA 、PEG-3-NBAPC） using PEG and 4-BTPA, 3-NBAPC as substrates. The chemical identification of these materials is conducted by applying ¹H NMR, UV-vis and so on.Research have founded that introduced some fluorophore into PEG chain, its fluorescence could be enhanced, and the molecule has a very good solubility in water.These compounds also have a strong AIE phenomenon. Through ion test, It is founded that these materials also have a good recognition performance of La³⁺, Zn²⁺ and K⁺.