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Novel axially substituted lanthanum phthalocyanines: Synthesis, photophysical and nonlinear optical properties
Dyes and Pigments ( IF 4.5 ) Pub Date : 2020-04-04 , DOI: 10.1016/j.dyepig.2020.108407
Bolong Li , Zengduo Cui , Yuping Han , Jiale Ding , Zhenhua Jiang , Yunhe Zhang

Materials with excellent nonlinear optical (NLO) properties are usually applied in optoelectronics and optical limiting devices. Photoinduced intramolecular electron transfer (PET) and energy transfer (ET) play an important role in enhanced NLO properties. Through axially connected anthraquinone to phthalocyanine, two types of novel lanthanum phthalocyanine (LaPc-Aqn and HLaPc-Aqn) were designed to effectively improve PET/ET process, and thus leading to excellent NLO properties. Hyperbranched phthalocyanines possess enhanced NLO properties owing to their special three-dimensional structures that have more donor–acceptor (D–A) systems in their cell structure than lanthanum phthalocyanines. The uniform polyphenylsulfone composite film(HLaPc-Aqn-PPSU) was prepared by a simple solution casting method according to the “like dissolves like” theory. The values of large third-order nonlinear susceptibility (Im[χ(3)]) and low limit threshold (Ilim) were 1.51 × 10−9 esu and 0.015 J/cm2, respectively, demonstrating that the film had great optical limiting performance. Such research can contribute to the development of novel phthalocyanine materials for nonlinear optics and optical limiting devices.



中文翻译:

新型轴向取代镧酞菁:合成,光物理和非线性光学性质

具有优异的非线性光学(NLO)特性的材料通常用于光电和光学限制设备。光诱导的分子内电子转移(PET)和能量转移(ET)在增强NLO性能方面起着重要作用。通过将蒽醌与酞菁轴向连接,设计了两种新型的镧酞菁(LaPc-Aqn和HLaPc-Aqn),以有效改善PET / ET工艺,从而带来出色的NLO性能。超支化酞菁具有增强的NLO性能,这是由于其特殊的三维结构在其细胞结构中具有比镧酞菁更多的供体-受体(D-A)系统。根据“相似溶解”理论,采用简单的溶液流延法制备了均匀的聚苯砜复合膜(HLaPc-Aqn-PPSU)。(3) ])和下限阈值(Ilim)分别为1.51×10 -9  esu和0.015J / cm 2,表明该膜具有良好的光学限制性能。此类研究可有助于开发用于非线性光学和光学限制设备的新型酞菁材料。

更新日期:2020-04-06
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