含有七五七 (7-5-7) 成员环的缺陷纳米基因
Yiyang Fei1, Yubin Fu2, Xueqin Bai1
1Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, 999077 Hong Kong, P. R. China.
Journal of the American Chemical Society
|January 27, 2021
概括
具有特定七五七环缺陷的新型纳米基因具有抗芳香性质和高稳定性. 这项研究阐明了拓缺陷对纳米烯特性的影响.
科学领域:
- 材料科学
- 有机化学
- 凝聚物质物理学
背景情况:
- 石墨烯的缺陷显著影响其光学,电子和磁性特性.
- 尽管进行了广泛的结构性表征,但拓缺陷对石墨烯的物理化学性质的影响尚未完全理解.
研究的目的:
- 合成具有明确拓缺陷的新型纳米基因.
- 研究七五七 (7-5-7) 成员环对纳米基因特性的影响.
- 了解纳米基因中缺陷结构和电子特性之间的关系.
主要方法:
- 三种新型纳米基因 (化合物1-3) 的自下而上的合成.
- 进行X射线晶体分析以确定分子结构.
- 紫外线吸收,循环电压测量和时间分辨率吸收光谱.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 合成的纳米基因1-3在它们的sp2碳框架内含有7-5-7成员的环.
- 化合物1几乎是平面的,化合物2略有形,化合物3有双形的几何形状.
- 纳米基因1-3在基本状态下表现出抗芳香性质和高环境稳定性.
- 实验和理论结果证实了抗芳香性质和稳定性,与不稳定的七边形含纳米基因形成鲜明对比.
结论:
- 原子精确的缺陷,特别是7-5-7环,可以控制地引入纳米烯框架.
- 这些有缺陷的纳米基因具有独特的抗芳香性质和显著的稳定性.
- 这项研究提供了对结构属性关系的关键见解,并使扩展纳米基因的电子结构能够精确控制.
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