Nonlinear Optical and Two-Photon Absorption Properties of 1,3,5-Tricyano-2,4,6-tris(styryl)benzene-Containing Octupolar Oligomers
作者:Bong Rae Cho、Ming Jun Piao、Kyung Hwa Son、Sang Hae Lee、Soo Jung Yoon、Seung-Joon Jeon、Minhaeng Cho
DOI:10.1002/1521-3765(20020902)8:17<3907::aid-chem3907>3.0.co;2-f
日期:2002.9.2
Octupolar oligomers containing 2-12 molecules of 1,3,5-tricyano-2,4,6-tris(styryl)benzene derivatives have been synthesized and their nonlinear optical and two-photon absorption (TPA) properties were determined. The beta(0) values are in the range of (85-1219) x 10(-30) esu and increase monotonically with the increasing number of the octupolar units within the molecule. The two-photon-induced fluorescence
已经合成了包含2-12个1,3,5-tricyano-2,4,6-三(苯乙烯基)苯衍生物分子的八极低聚物,并确定了它们的非线性光学和双光子吸收(TPA)特性。beta(0)值在(85-1219)x 10(-30)esu范围内,并且随着分子内八极单元数目的增加而单调增加。双光子诱导的荧光激发光谱与单光子吸收光谱非常相似,不同之处在于波长增加了一倍,表明单光子和双光子允许的激发态相同。通过双光子诱导的荧光方法用纳秒脉冲测量的TPA横截面峰值值(delta(max))在(3010-62,930)x 10(-50)cm(4)s光子( -1)。随着分子中八极单元数目的增加,delta(max)也增加。在delta(max)和beta之间观察到线性关系,并且这种delta-beta关系可作为合成新型八极低聚物和具有大TPA和beta的聚合物的有用设计策略。