1,2,4,5-四{4-[N,N-二(4-碘苯基)氨基]苯乙烯基}苯的聚集诱导发光增强及电存储性质

A conjugated dendrimer based triphenylamine, 1,2,4,5-tetra{4-[N,N-di(4-iodophenyl)amino] styryl}benzene(TPAB-I), was synthesized through Wittig-Horner reaction. The maximum emission wavelengths of TPAB-I were 451, 464, 478, 481 and 511 nm in toluene, THF, ethyl acetate, CH2Cl2 and DMF, respectively. The maximum emission wavelengths of solid and film of TPAB-I were 526 and 488 nm, respectively. Aggregation-induced emission enhancement of TPAB-I had been found. The possible mechanism of this phenomenon was discussed. An organic electrical memory device having the Al/ TPAB-I/ indium-tin oxide (ITO) sandwich structure was fabricated firstly. The device exhibited a flash memory effect with a high ON/ OFF current ratio nearly 104, a long retention time above 104 s and a read voltage 1.0 V. The read voltage and erase voltage were 1.5 and -2.0 V, respectively. The results demonstrated that the synthetic TPAB-I possessed a high potential to become dendrimeric memory device.