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Resonance-Enhanced Two-Photon Absorption and Optical Power Limiting Properties of Three-Dimensional Perylene Bisimide Derivatives
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-10-12 , DOI: 10.1021/acs.jpcb.1c07296
Wan Feng 1 , Ke Liu 1 , Jianyang Zang 1 , Jiale Xu 1 , Haonan Peng 1 , Liping Ding 1 , Taihong Liu 1 , Yu Fang 1
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-10-12 , DOI: 10.1021/acs.jpcb.1c07296
Wan Feng 1 , Ke Liu 1 , Jianyang Zang 1 , Jiale Xu 1 , Haonan Peng 1 , Liping Ding 1 , Taihong Liu 1 , Yu Fang 1
Affiliation
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Push–pull organic structures characterized by an intramolecular charge transfer (ICT) process and π-electron delocalization are potentially interesting luminescent materials. A series of three-dimensional o-carborane-containing perylene bisimide derivatives (PBIs) were synthesized, and their optical properties were systematically investigated to illustrate the stereo effect, especially on the two-photon absorption (2PA) and optical power limiting (OPL) properties. Open-aperture Z-scan curves showed that all four PBIs displayed strong and broad two-photon absorptivities based on the resonance-enhanced phenomenon. The maximum degenerate two-photon absorption cross section (δ2PA) increased with the number of PBI substituents. The derivative CB-PBI possessed a δ2PA value of ∼2400 GM at 650 nm, a significant enhancement in comparison with that of the parent PBI (∼719 GM), ascribed to the present stereo effect. When the aromatic-donating units changed from naphthyl and pyrenyl to PBI, the generated multidimensional intramolecular charge transfer (ICT) from the aromatic units to the o-carborane cage contributed to the 2PA processes. All of the fluorophores exhibited excellent optical power limiting (OPL) performances as well as a minimum limiting threshold of ∼4.98 mJ/cm2 for CB-PBI. These significant results not only allow us to get deep insight into the nature of the fundamental stereo effect and nonlinear optical (NLO) response involved but also guide us toward the design of new multifunctional luminescent materials.
中文翻译:
三维苝双酰亚胺衍生物的共振增强双光子吸收和光功率限制特性
以分子内电荷转移 (ICT) 过程和 π 电子离域为特征的推拉有机结构是潜在的有趣发光材料。合成了一系列三维含邻碳硼烷的苝双酰亚胺衍生物(PBI),并系统地研究了它们的光学性质以说明立体效应,特别是对双光子吸收(2PA)和光功率限制(OPL)特性。开放孔径 Z 扫描曲线表明,基于共振增强现象,所有四个 PBI 都显示出强而宽的双光子吸收率。最大简并双光子吸收截面 (δ 2PA ) 随 PBI 取代基的数量增加而增加。衍生物CB-PBI具有δ 2PA650 nm 处的~2400 GM 值,与母体 PBI(~719 GM)相比显着增强,归因于当前的立体效果。当芳烃供体单元从萘基和芘基变为 PBI 时,产生的多维分子内电荷转移 (ICT) 从芳烃单元到邻碳硼烷笼有助于 2PA 过程。所有荧光团都表现出出色的光功率限制 (OPL) 性能以及CB-PBI的最小限制阈值为 ~4.98 mJ/cm 2。这些重要的结果不仅使我们能够深入了解所涉及的基本立体效应和非线性光学 (NLO) 响应的性质,而且还指导我们设计新型多功能发光材料。
更新日期:2021-10-22
中文翻译:
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三维苝双酰亚胺衍生物的共振增强双光子吸收和光功率限制特性
以分子内电荷转移 (ICT) 过程和 π 电子离域为特征的推拉有机结构是潜在的有趣发光材料。合成了一系列三维含邻碳硼烷的苝双酰亚胺衍生物(PBI),并系统地研究了它们的光学性质以说明立体效应,特别是对双光子吸收(2PA)和光功率限制(OPL)特性。开放孔径 Z 扫描曲线表明,基于共振增强现象,所有四个 PBI 都显示出强而宽的双光子吸收率。最大简并双光子吸收截面 (δ 2PA ) 随 PBI 取代基的数量增加而增加。衍生物CB-PBI具有δ 2PA650 nm 处的~2400 GM 值,与母体 PBI(~719 GM)相比显着增强,归因于当前的立体效果。当芳烃供体单元从萘基和芘基变为 PBI 时,产生的多维分子内电荷转移 (ICT) 从芳烃单元到邻碳硼烷笼有助于 2PA 过程。所有荧光团都表现出出色的光功率限制 (OPL) 性能以及CB-PBI的最小限制阈值为 ~4.98 mJ/cm 2。这些重要的结果不仅使我们能够深入了解所涉及的基本立体效应和非线性光学 (NLO) 响应的性质,而且还指导我们设计新型多功能发光材料。