中文摘要：

实验研究了一种新的共轭杂环化合物9-乙基-3-{5-（4-叔丁基苯基）-[1，3，4]-噁二唑-2-苯乙烯基}-咔唑（VBPOEC）的双光子吸收性质和电化学性质。双光子吸收截面采用非线性透过率法测定，双光子最大吸收波长位于800nm，吸收截面为1350GM。采用紫外光谱的边带吸收法得到带隙为2．77eV，用循环伏安法对其电化学性质进行了初步研究，氧化电位为1.059V，其HOMO能级为-5.80eV，其LUMO轨道能级为-3．03eV。研究了光学、电化学性质与分子电子结构的关系。

英文摘要：

The two-photon absorption and electrochemical , linear optical properties of a new π-conjugated heteroaromatic chromophore 9-ethyl-3- （ 2- { 4-[ 5- （ 4-tert-butyl-phenyl ） -[ 1,3,4 ] oxadiazol-2-yl]-phenyl } -vinyl） -carbazole（VBPOEC）was explored. Two-photon absorption cross-section values of the chromophore in solution was investigated by a direct nonlinear transmission （NLT） method with nanosecond pulse, The maximum values of TPA was measured in 800nm to be 1350GM for VBPOEC. The optical bandgap of VBPOEC was 2.77eV. The electrochemical properties was explored by cyclic voltammetry, the oxidation potential of VBPOEC was 1. 059 V, which indicated the HOMO energy level was -5.80eV and the LUMO energy level was -3.03eV. These results provide a basis for understanding the electronic and optical properties of the conjugated heteroaromatic chromophore in terms of the underlying molecular and electronic structures.