曲纳米基因作为一个 [2]Rotaxane中的止步器,具有双光子激发发射
Marcos D Codesal1, Arthur H G David1, Carla I M Santos2
1Departamento de Química Orgánica, Unidad de Excelencia de Química, Facultad de Ciencias, Universidad de Granada, Avda. Fuente Nueva s/n, 18071 Granada, Spain.
The Journal of organic chemistry
|June 22, 2024
概括
庞大的七边形纳米基因 [2] 通过迈克尔的添加,防止拆卸的 caprotaxanes. 这些纳米基因也赋予了被封闭的轮素结构的发射和非线性光学特性.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
背景情况:
- 罗塔克桑是机械互锁的分子,在分子机器中具有潜在的应用.
- 控制罗他素组装和稳定性对于它们的功能实施至关重要.
- 曲的芳香分子为超分子设计提供独特的固体和电子特性.
研究的目的:
- 为了利用含有七面体的扭曲纳米基因作为 [2]rotaxanes的拦截器.
- 调查这些纳米基因在稳定轮素结构中的作用.
- 为了探索纳米烯塞所赋予的光学特性.
主要方法:
- 合成含有七面体的扭曲纳米基因.
- 使用迈克尔类添加反应与乙烯基硫基组对 [2] 罗塔克桑进行封装.
- 由此产生的罗塔结构及其光学特性 (发射,两光子吸收) 的表征.
主要成果:
- 成功封闭 [2]rotaxanes与含有七面体的扭曲纳米基因.
- 证明大型纳米烯塞能够有效地防止罗塔克桑分解.
- 在封闭的罗塔克桑中观察发射和非线性光学特性 (二光子吸收和发射).
结论:
- 含有七面体的扭曲纳米基因是稳定 [2]rotaxanes 的有效拦截剂.
- 这些纳米基因的结合为罗塔xane系统引入了有价值的光物理特性.
- 这种方法为设计具有定制光学特征的功能性超分子架构提供了新的策略.
相关概念视频
02:06Newman Projections
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
00:52¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...