具有超螺旋式纳米结构的同体基质共价有机框架能够实现高效的基质性诱导的旋转选择性
Bang Hou1, Kaixuan Wang1, Chao Jiang1
1School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, China.
Angewandte Chemie (International ed. in English)
|August 24, 2024
概括
研究人员通过调整连接器的长度来制造超螺旋共价有机框架 (COF) 纳米纤维. 这些合性COF表现出增强的enantioselectivity和旋转波器特性,推进纳米材料应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 有机化学 有机化学
背景情况:
- 共价有机框架 (COFs) 提供可调节的特性,但实现像超螺旋体这样的复杂纳米结构是困难的.
- 具有可控形态的同体性COF对于体识别和旋转电子学的先进应用至关重要.
研究的目的:
- 开发一种合成同体状超螺旋COF纳米纤维的方法.
- 研究链接器结构对COF形态和属性的影响.
- 为了评估合成的超螺旋COFs的奇拉识别和旋转过能力.
主要方法:
- 合成 homochiral 3D COFs (13-OR) 使用基于 enantiopure 1,1'-bi-2-naphthol (BINOL) 的四甲基和四胺,其基链长度不同.
- 描述COF的形态和结构,包括自组装过程的时间跟踪.
- 通过碳水化合物结合评估合性识别,并测量合性诱导的旋转选择性 (CISS) 效应.
主要成果:
- 通过操纵悬浮的基链长度来实现同质的超螺旋COF纳米纤维的受控合成.
- COF-13-OEt,与最佳的乙氧基替代剂,在超螺旋纤维中表现出宏观的性,而其他类型形成球形或非螺旋结构.
- 由于CISS效应,超螺旋式COF在碳水化合物结合中显著增强了反反选择性 (高达六倍) 和高旋转极化比率 (48-51%).
结论:
- 有机连接器中的基链长度是指导超螺旋COF纳米结构形成的关键因素.
- 合成的超螺旋式COF在手动传感和基于旋转的电子产品中表现出有前途的应用.
- 这项研究为制造具有量身定制功能的复杂性纳米材料提供了一条新的途径.
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