Third-order nonlinear optical properties based on triphenylamine derivative-based covalent organic frameworks

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED Dyes and Pigments Pub Date : 2024-11-15 DOI:10.1016/j.dyepig.2024.112542

Jianhong Jia, Mingyan Li, Ran Yao, Jiahui Chu, Endian Su, Xiangxiang Zhou, Yanhong Cui, Yuanbin She

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Abstract

Nonlinear optics (NLO) is an extremely critical research area. In recent years, covalent organic frameworks (COFs) have attracted much attention as a potential NLO material. In this study, a series of COF materials with different D-A effects were successfully synthesized based on the excellent electron-donating properties of the triphenylamine group and were prepared into D-A COFs\KBr sheet materials that can be used for third-order NLO by the KBr−pressing method. The results of the open-aperture Z-scan technique showed that all COFs\KBr sheets exhibited saturable absorption (SA) behavior at 3 μJ, with nonlinear absorption coefficients (β) of −1.64, −1.23, and −2.02 × 10⁻⁹ mW⁻¹ for PT-PA, PT-BD, and PT-TZ, respectively. Theoretical calculations show that the electron transport distance of PT-PA is shorter than that of PT-BD, while the introduction of S atoms makes the D-A effect of PT-TZ stronger than that of PT-BD, and thus the SA properties of PT-PA and PT-TZ are better than those of PT-BD. These works indicate that the COFs\KBr sheets have a potential application as high-performance NLO materials and also provide an option for COFs powder application in the field of third-order NLO.

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基于三苯胺衍生物共价有机框架的三阶非线性光学特性

非线性光学（NLO）是一个极其重要的研究领域。近年来，共价有机框架（COFs）作为一种潜在的 NLO 材料备受关注。本研究基于三苯胺基团优异的电子氖化特性，成功合成了一系列具有不同D-A效应的COF材料，并通过KBr压片法制备成了可用于三阶NLO的D-A COFs\KBr 片材料。开孔 Z 扫描技术的结果表明，所有 COFs\KBr 片在 3 μJ 时都表现出可饱和吸收（SA）行为，PT-PA、PT-BD 和 PT-TZ 的非线性吸收系数（β）分别为-1.64、-1.23 和 -2.02 × 10-9 mW-1。理论计算表明，PT-PA 的电子传输距离短于 PT-BD，而 S 原子的引入使得 PT-TZ 的 D-A 效应强于 PT-BD，因此 PT-PA 和 PT-TZ 的 SA 特性优于 PT-BD。这些工作表明，COFs/KBr片材作为高性能NLO材料具有潜在的应用前景，同时也为COFs粉末在三阶NLO领域的应用提供了一种选择。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.