Synthesis,Structure And Properties Of Novel Boron-Nitrogen Embedded Polycyclic Aromatic Hydrocarbons

Polycyclic aromatic hydrocarbons(PAHs)and their derivatives have been a res hotspot in the field of organic photoelectric functional materials.Because of PAHs’u conjugated structure and photoelectric properties,they have been widely used in the fie organic optoelectronic devices.The photoelectric properties of PAHs can be effec controlled by introducing heteroatoms or functional groups into the molecular skeleton.(?)thesis,we focus on replacing C=C units by B-N units to obtain novel PAHs.Their solid structure,photophysical properties and electrochemical behavior were systematically st(?)and the structure-activity relationship was analyzed combined with quantitative calculationChapter 1,we introduce the research progress of representative BN-PAHs.The emphasizes the feasibility of developing BN-PAHs to regulate the performance of or photoelectric functional devices.Finally,we briefly describes the topic selection ideas and research contents of thesis.Chapter 2:a novel BN fused benzo[ghi]perylene molecule BN-Bzp was designe synthesized.Boron-nitrogen unit was successfully introduced into the molecular skelet benzo[ghi]perylene.The single crystal structure,photophysical properties and electroche behavior of BN-Bzp were characterized completely.Supplemented by theoretical calcu of electron energy levels,which revealed the fluorescence enhancement characteristics o Bzp.Chapter 3:a novel diboronaza-coronene molecule BN-Cor was designed and synthe by using the Scholl reaction which summarized in Chapter 2.Through the systematic stu the solid-state structure,photophysical properties and electrochemical behavior of BN supplemented by the theoretical calculation of electronic energy levels,it shows tha electronic structure and solid-state accumulation of molecules can be effectively regulat introducing different numbers of BN units.Meanwhile,the rationality of the synthesis m in expanding the molecules of π conjugated system was verified.In a word,this thesis developed an efficient synthesis strategy of BN-PAHs,we rep boron-catalyzed Scholl reaction for the first time,and obtained two novel BN-PAHs.showed better photophysical properties than their all-carbon compounds,also enriche molecular reserve of heteropolycyclic aromatic hydrocarbons.