摘要
为了研究分子结构对三光子吸收的影响,合成了两种新型芴类衍生物,分别是2,7-二(2-4(甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(A)和2-溴-7-(2-(4-甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(B),采用1064nm的Nd∶YAG激光器测试其三光子吸收截面的方法,得到了它们的三光子吸收截面分别高达(6.03±0.6)×10-76cm6·s2/photon2和(4.25±0.4)×10-76cm6·s2/photon2的结果,在高斯03软件下,用密度泛函方法对这两个分子进行了结构优化,并用含时密度泛函理论计算了它们的激发态能量和电子轨道。结果表明,分子内电荷转移方向对三光子吸收存在影响。
In order to study effect of molecular structure on three-photon absorption(3PA) characteristics, two novel fluorene-based derivatives:2, 7-bis(2-(4-methoxyphenyl)ethynyl)-9,9-dioctyl-9H-fluorene(A) and 2-bromo-7-(2-(4-methoxyphenyl)ethynyl)-9,9-dioctyl-9H-fluorene(B) were synthesized.The 3PA cross-sections of both the compounds were tested by using a Q-switched Nd∶YAG laser at 1064nm.The 3PA cross-sections were obtained , i.e., (6.03 ±0.6) × 10-76 cm6 · s2/photon2 and (4.25 ±0.4) ×10 -76 cm6 · s2/photon2 respectively.The geometries in the ground states and electronic structures of both the compounds were investigated by density functional theory methods and time -dependent density functional theory methods of Gaussian 03, and the impact on the three-photon absorption characteristics was analyzed.
出处
《激光技术》
CAS
CSCD
北大核心
2014年第2期205-209,共5页
Laser Technology
基金
国家自然科学基金资助项目(11004048
61177004)
关键词
非线性光学
三光子吸收截面
光限幅
芴类衍生物
nonlinear optics
three-photon absorption section
optical limiting
fluorine-based derivatives