Nonlinear optical properties of ferrocene- and porphyrin-[60]fullerene dyads.
Nonlinear optical properties of ferrocene- and porphyrin-[60]fullerene dyads.
复制标题
DOI：
10.1002/cphc.200600760
复制
发表时间：
2007-05
期刊：
影响因子：
--
通讯作者：
E. Xenogiannopoulou;M. Medved’;K. Iliopoulos;S. Couris;M. Papadopoulos;D. Bonifazi;C. Sooambar;Aurelio Mateo‐Alonso;M. Prato
中科院分区：
文献类型：
--
作者：
E. Xenogiannopoulou;M. Medved’;K. Iliopoulos;S. Couris;M. Papadopoulos;D. Bonifazi;C. Sooambar;Aurelio Mateo‐Alonso;M. Prato
合成了一系列新型的[60]富勒烯-二茂铁和[60]富勒烯-卟啉二元化合物，其中富勒烯和给电子体部分通过柔性的三甘醇连接物连接在一起，并研究了它们的非线性光学响应。利用光学克尔效应(OKE)技术，用532 nm、35ps的激光脉冲测量了所有富勒烯衍生物在甲苯溶液中的三阶极化率X_1(3)，并确定了它们的第二超极化率伽马。与原始的富勒烯相比，所有研究的富勒烯二元化合物都表现出了增强的非线性光学响应，这归因于电荷分离态的形成。所有实验测量的超极化率伽马值也由半经验方法AM1和PM3计算。理论值和实验值之间有很好的相关性，这表明可以用简单的半经验方法来设计和优化具有更好的非线性响应的富勒烯二元化合物。
A series of novel [60]fullerene-ferrocene and [60]fullerene-porphyrin dyads, in which a fullerene and an electron donating moiety are attached through a flexible triethylene glycol linker are synthesized and their nonlinear optical (NLO) response studied. Specifically, the third-order susceptibility chi(3) of all fullerene derivatives are measured in toluene solutions by the optical Kerr effect (OKE) technique using 532 nm, 35 ps laser pulses and their second hyperpolarizability gamma are determined. All fullerene dyads studied exhibit enhancement of their NLO response compared to pristine fullerenes which has been attributed to the formation of a charge separated state. All experimentally measured hyperpolarizability gamma values are also calculated by the semiempirical methods AM1 and PM3. A good correlation is found between the theoretical and experimental values, suggesting that simple semiempirical methods can be employed for the designing and optimization of the fullerene-containing dyads displaying improved nonlinear responses.