Star-Shaped Donor-π-Acceptor Conjugated Oligomers with 1,3,5-Triazine Cores: Convergent Synthesis and Multifunctional Properties
作者:Shijie Ren、Danli Zeng、Hongliang Zhong、Yaochuan Wang、Shixiong Qian、Qiang Fang
DOI:10.1021/jp104710y
日期:2010.8.19
correlations with the structures. Closed-aperture and open-aperture Z-scan methods were employed to measure the nonlinear refractive index and two-photon absorption properties of the oligomers, respectively. TFT1 showed a high nonlinear refractive index of 4.14 × 10−12 esu in THF solution with an excitation wavelength of 800 nm. Also, TFT1 exhibited a large two-photon absorption cross section of 234 GM and
单分散的低聚物由于其明确的分子结构,高纯度和溶液可加工性而被广泛开发并用于不同的光电领域。星形低聚物因其抗聚集能力和稳定的电致发光特性而特别受到OLED应用的关注。此外,由于分子内电荷转移和协同增强作用,已知星形供体-π-受体共轭分子具有良好的非线性光学和双光子吸收特性。在这种情况下,三代高度可溶的1,3,5-三嗪基供体-π受体化合物TFT1,TFT2和TFT3通过收敛的合成策略制备了,并充分研究了它们的光电性能,显示出与结构明显的相关性。采用闭孔和开孔Z扫描方法分别测量低聚物的非线性折射率和双光子吸收特性。TFT1在THF溶液中显示出4.14×10 -12 esu的高非线性折射率,激发波长为800 nm。此外,TFT1的双光子吸收截面为234 GM,并且具有上变频的双光子激发荧光,其最大λTPEF为λ在800 nm激光照射下,脉冲持续时间为140 fs时的527 nm值。使用这些低聚物的