Synthesis,Charaterization And Properties Of Novel Bn-embedded Conjugated Organic Molecules

The research work in this dissertation mainly focused on developing efficient synthetic strategies to synthesize novel BN-substituted organicπ-conjugated materials,and the structure-property relationship was deeply studied,providing new concepts for harmful ions detection.First,a series of novel BN-embedded aromatic molecules were successfully synthesized by an efficient electrophilic borylation method based on the electrophile PhBCl₂.The research suggested that the introduction of the alkyl chain has a certain effect on fluorescent quantity and fluorescence lifetime.At the same time,the introduction of electronegativity difference groups such as thiophene and benzene can also lead to the difference of photochemical properties.It proved the nature and performance of the organic conjugated molecules can be improved by the replace of organic conjugated framework and fused modification.Second,to achieve growth of conjugated chain and difference of electro-optical properties,we developed to synthesize large BN-embeddedπ-systems with different modified groups based on metal catalyzed coupling reaction.The study found that the BN hybrid derivatives had a bigger rigid conjugated structures and lower HOMO energy level,compared with the BN miscellaneous fused aromatic molecules.And then BN-embedded aromatic molecules were used as function of chromophores to detect proton and environmental harmful ion,the results found that thiese molecules can realize the dual channel detection for H⁺and F^-,especially for metallic mercury ions,which had low detection limit and high selectivity.