Zhao Yuzhen, Li Zhenhua, Li Qing, Zhao Yang, Yao Ruijuan, Ma Cheng, Zhang Yongming, Wang Dong
Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, China.
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Molecules. 2022 Aug 6;27(15):5006. doi: 10.3390/molecules27155006.
A high-yielding click reaction was used to synthesize a series of highly conjugated, symmetrical, as well as asymmetrical compounds with a benzene core. Cyclic voltammetry and ultraviolet/visible absorption spectroscopy were carried out, and proved that the side groups of the benzene derivatives played an important role in the energy gaps, and affected the third-order non-linear optical response. The maximum absorption wavelength of the series of benzene derivatives showed an obvious red-shift. Moreover, the addition of resilient electron-withdrawing groups significantly narrowed the energy levels as compared with precursors. The third-order nonlinear properties of this benzene derivative were tested by the Z-scan technique. The expected properties of this series of molecules were obtained, and it was found that the series of molecules undergoes a transition from reverse saturable absorption to saturable absorption, which has certain reference significance for a nonlinear optical field.
采用高产率的点击反应合成了一系列具有苯核的高度共轭、对称以及不对称的化合物。进行了循环伏安法和紫外/可见吸收光谱分析，结果表明苯衍生物的侧基在能隙中起重要作用，并影响三阶非线性光学响应。该系列苯衍生物的最大吸收波长呈现明显的红移。此外，与前体相比，添加有弹性的吸电子基团显著缩小了能级。通过Z扫描技术测试了该苯衍生物的三阶非线性性质。获得了该系列分子的预期性质，发现该系列分子经历了从反饱和吸收到饱和吸收的转变，这对非线性光学领域具有一定的参考意义。
