在基于Pillararene的宿主-客座复合晶体中,纳米封装诱导的第二次波生成
Haozhong Liang1,2, Yuting Yang3, Li Shao4
1Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
Journal of the American Chemical Society
|January 24, 2023
概括
研究人员使用柱体[5]arene主机来封装非线性光学 (NLO) 分子,控制它们的固态安排. 在某些情况下,这种方法成功地产生了强大的第二波 (SHG),而在其他情况下则灭了它,为新的NLO材料铺平了道路.
科学领域:
- 材料科学
- 晶体学
- 光电子产品
背景情况:
- 固态有机非线性光学 (NLO) 材料中的中心对称安排阻碍了第二波生成 (SHG) 应用.
- 控制分子包装对于克服NLO材料性能限制至关重要.
研究的目的:
- 利用柱体[5]arene作为宿主来封装NLO分子并操纵它们的固态安排.
- 研究宿主-客体复合对NLO材料的中心对称性和SHG活性的影响.
- 开发一种有效的方法来制备这些新型NLO复合材料.
主要方法:
- 在柱体[5]arene (BrP5) 主体内封装NLO分子 (OM,DAST,MNS).
- 形成2:1和1:1的宿主-客人复合体.
- 晶体结构和NLO特性 (SHG) 的表征.
- 一种超声诱导结晶技术的开发.
主要成果:
- 柱体[5]arene与NLO客户形成了纳米囊架构,从而形成了整体中心对称的晶体结构.
- 在2:1复合体中随机定向OM和DAST打破了局部中心对称,产生了强大的SHG.
- 在1:1复合体中,MNS的有序定向保持了中心对称性,导致SHG灭.
- 超声波诱导的结晶使NLO材料能够快速准备.
结论:
- 主体-客体复合与柱体[5]arene有效控制有机材料的固态包装和NLO特性.
- 这一战略为设计具有可调节的SHG的固态有机NLO材料提供了新的途径.
- 潜在的应用包括高功率激光,光学开关和先进的成像.
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