π电子共轭键结构对材料非线性光学性能影响研究(英文)

The effect of different π electron conjugation bond structure of molecules on the nonlinear optical properties

合成了具有不同π电子共轭键3个新的有机光学材料4-(吡啶-4-乙烯),4’-(N,N-二羟乙基氨基)二乙烯苯(a),N-((4-(N,N-二羟乙基氨基)-苯亚甲基)-4-(吡啶-4-乙烯)苯胺(b)和4-(吡啶-4-乙烯),4’-(N,N-二羟乙基氨基)偶氮苯(c),使用脉宽8ns波长532nm调Q倍频ns/ps Nd∶YAG脉冲激光系统测试了它们的非线性光学性能,研究了分子结构与非线性光学性能之间的关系。结果显示这些化合物具有大的三阶非线性光学系数,这可能来源于它们长的D-π-A共轭电子结构;以N N双键为共轭键的化合物的非线性光学性能优于以C N或C C双键为共轭键的化合物。

Three novel organic optical materials with different p electron conjugation bond structure, 4 ＇-（N, N-dihydroxyethylamino）,4-（pyridine-4-vinyl） stilbene （a）, N-（4-N,N-dihydroxy-ethylaminobenzylidene）.4-（pyridine-4-vinyl）aniline （b）, 4＇-（N,N- dihydroxyethyl-amino）, 4-（pyridin-4-vinyl）azobenzene （c）, were prepared, their nonlinear optical properties were determined by using 8ns laser pulses at 532nm wavelength, and the relationship between p electron conjugation bond structure of molecules and nonlinear optical properties was investigated. The results show that these compounds possess large nonlinear optical properties, which are attributed to the long D-π-A conjugation structure. The nonlinear optical properties of compound with N-N double bond as conjugation bond are superior to that of compounds with C=N or C=C double bond.