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采用钯催化条件下多位点Heck偶联反应,以芳香八碘代物1,2,4,5-四{4-[N,N-二(4-碘苯基)氨基]苯乙烯基}苯(TPAB-I)和4-(N,N-二苯基)氨基苯乙烯为反应物,合成了一种新型荧光树枝分子1,2,4,5-四{4-{N,N-二{4-[4-(N,N-二苯基氨基)苯乙烯基]苯基}氨基}苯乙烯基}苯(TPAB-TPA).目标化合物的结构经过红外光谱、核磁共振谱、高分辨质谱确认.树枝分子TPAB-TPA在甲苯、乙酸乙酯、四氢呋喃、二氯甲烷和N,N-二甲基甲酰胺(DMF)溶液中的最大荧光发射峰分别位于483,457,497,531,505 nm.量子产率分别为0.48,0.28,0.23,0.49,0.18,在二氯甲烷和四氢呋喃(THF)中的荧光寿命分别为1.48和1.53 ns.用循环伏安法测定TPAB-TPA的HOMO能级和LUMO能级分别为-5.16和-2.64 eV.制备了ITO/TPAB-TPA/Al三明治型电存储器件,ON/OFF电流比大于104,在1 V的读取电压下,持续时间达到1000 s.
A multi-site Heck coupling reaction under palladium catalysis was performed using aromatic octaiodo 1,2,4,5-tetrakis 4- [N, N-bis (4-iodophenyl) amino] styryl} benzene (TPAB-I) and 4- (N, N-diphenyl) aminostyrene as reactants, a novel fluorescent dendrimer molecule 1,2,4,5-tetrakis {4- {N, TPAB-TPA). The structure of target compound was confirmed by IR, 1HNMR, high resolution The maximum fluorescence emission peak of the dendrimer TPAB-TPA in toluene, ethyl acetate, tetrahydrofuran, methylene chloride and N, N-dimethylformamide (DMF) solution was 483,457,497,531,505 nm, respectively.The quantum yields were 0.48,0.28,0.23,0.49,0.18, the fluorescence lifetime in dichloromethane and tetrahydrofuran (THF) were 1.48 and 1.53 ns, respectively.Using cyclic voltammetry, the HOMO and LUMO levels of TPAB-TPA were - 5.16 and -2.64 eV. An ITO / TPAB-TPA / Al sandwich type electrical storage device was prepared with an ON / OFF current ratio of greater than 104 and a duration of 1000 s at a read voltage of 1 V.