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首页> 外文期刊>Chemistry: A European journal >Assembly of an Achiral Chromophore into Light-Responsive Helical Nanostructures in the Absence of Chiral Components
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Assembly of an Achiral Chromophore into Light-Responsive Helical Nanostructures in the Absence of Chiral Components

机译：在没有手性组分的情况下将手性生色团组装成光响应性螺旋纳米结构

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摘要

The chirality found in living organisms is one of unsolved mysteries on Earth. It is crucial to understand the manner in which small achiral molecules evolve into helical superstructures in the absence of chiral components because this process can provide important insights regarding the origin of chirality in nature. 1)the uncommon helical assembly of an achiral trigonal chromophore into helical nanostructures with aggregation-induced emission enhancement (AIEE) characteristics and 2)the tunability of the helical pitch and fluorescence intensity in response to light is reported. The Rietveld refinement of X-ray diffraction (XRD) patterns and the growth process suggest that a striking transformation from an achiral to an asymmetric molecule can occur as a result of specific interactions with certain solvents, presumably leading to the unique helical assembly. More importantly, exposure to UV or visible light promoted not only the formation of irregular helical structures with a wide range of pitch lengths but also an increase in fluorescence intensity.
机译：在活生物体中发现的手性是地球上尚未解决的奥秘之一。至关重要的是，在没有手性成分的情况下，了解非手性小分子演变成螺旋形超结构的方式至关重要，因为该过程可以提供有关自然手性来源的重要见解。 1）非手性三方生色团的不寻常的螺旋组装成具有聚集诱导的发射增强（AIEE）特性的螺旋纳米结构，以及2）报道了螺旋节距和荧光强度响应于光的可调性。 X射线衍射（XRD）图案的Rietveld精炼和生长过程表明，由于与某些溶剂的特定相互作用，可能会发生从非手性分子到不对称分子的惊人转变，大概导致了独特的螺旋组装。更重要的是，暴露于紫外线或可见光不仅促进了节距范围宽的不规则螺旋结构的形成，而且促进了荧光强度的增加。

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