三苯胺桥联的分散红衍生物的合成及光物理性质研究

Synthesis and Photophysical Properties of Triphenylamine-bridged Dispersed Red-1 Derivative

设计和制备了一种新的有机光活性材料三苯胺桥联的分散红衍生物。该材料能很好地溶解于许多常见的有机溶剂。通过紫外可见吸收光谱、稳态和时间分辨荧光光谱、激光瞬态解析光谱、Z-扫描技术等方法研究了材料的光学和非线性反饱和吸收性能。与起始原料5-(N,N′-二苯氨基)苯基-1,3-二醛的荧光寿命(4.76ns)相比,三苯胺桥联的分散红衍生物的荧光寿命要短很多,为1.2ns,这个结果与接枝到5-(N,N′-二苯氨基)苯基上1,3-位的分散红的强吸电子作用密切相关。材料的双光子吸收截面为32GM(1GM=10-50cm4·s/photon·mol)。

A new triphenylamine-bridged Dispersed Red-1 derivative （DR1-TPA-DR1） designed for twophoton absorption was synthesized by the reaction of 5-（N,N-diphenylamino）benzene-1,3-dicarbaldehyde （DBD） and cyanoacetylated DR1 in the presence of piperidine. This material is highly soluble in many common organic solvents. The optical and two-photon absorption properties have been investigated by a variety of physical techniques, e. g. , UV/Vis absorption spectroscopy, steady-state and time-resolved photoluminescence spectroscopies, and Z-scan technique as well. In contrast to the starting material DBD, covalent attachment of cyanoaeetylated DR1 onto the triphenylamine gives rise to the decrease of the fluorescence life from 4.76 for DBD to 1.2 ns for DR1-TPA-DR1 due to the strong electron-withdrawing effect of cyanoacetylated DR1. The two-photon absorption cross-section of the resulting material is about 32 GM.