Design,Synthesis And Photoelectric Properties Of Several Organic Materials With Conjugated Heterocyclic Structures

Two-dimensional conjugated polymers are an important kind of two-dimensional materials.They have some advantages such as large specific surface area,many binding sites,and strong conjugation.They are used in organic photovoltaics,photocatalysis,electrochromic,energy storage and luminescent materials.In this thesis,several twodimensional conjugated polymers were synthesized,and their optoelectronic properties were characterized.The first one is that three CTFs materials with triazine are considered as the skeleton and thiophene structural units are considered as the linking group.The difference is the number of thiophenes on the thiophene structural unit between the triazine groups,which are characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy.The thermogravimetric test,UV-vis absorption spectra,scanning electron microscopy(SEM),BET and other tests were performed.The results showed that the thermal decomposition temperature of these materials was between 240?-300?.Through BET and SEM,it is well noted that three materials are mesoporous.The pore size of T1S2 and T1S4 is 50 nm,the pore size of T1S3 is 15-20 nm,and the pore size distribution of T1S3 is narrower,while the UV absorption spectrum shows that T1S3 has a larger absorption range.The research results show that not only the ?-conjugated structure inside the two-dimensional material will affect the overall performance of the material.The second one is a two-dimensional conjugated material B4 with aggregation induced emission.The first is to synthesize several two-dimensional conjugated materials,then use the hydrogen nuclear magnetic resonance spectrum and infrared spectrum to determine the structure,and then do ultraviolet absorption and fluorescence emission.In the test,select B4,which has good UV absorption and fluorescence emission performance,and do aggregationinduced fluorescence test.When the volume ratio of water is 90%,it shows red light emission,and when the volume ratio of water is 99%,it is blue light emission.It is said that the luminescence type of the material can be changed by adjusting the ratio of water.The third one includes two kinds of conjugated heterocyclic polymers.The ultraviolet absorption and fluorescence emission properties of the two substances are similar,but there are slight differences in the microstructure.The pore size of T1M2 is larger than 0.2?m-1?m,while the pore size of T1M1 The pore size is smaller between 20-800 nm,the pores of T1M2 are more uniform,and the infrared spectrum shows some molecular associations.