Packing Biomolecules into Sierpiński Triangles with Global Organizational Chirality

Posted on 15.09.2021 - 07:43
Fractals are found in nature and play important roles in biological functions. However, it is challenging to controllably prepare biomolecule fractals. In this study, a series of Sierpiński triangles with global organizational chirality is successfully constructed by the coassembly of l-tryptophan and 1,3-bi­(4-pyridyl)­benzene molecules on Ag(111). The chirality is switched when replacing l-tryptophan by d-tryptophan. The fractal structures are characterized by low-temperature scanning tunneling microscopy at the single-molecule level. Density functional theory calculations reveal that intermolecular hydrogen bonds stabilize the Sierpiński triangles.

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Li, Chao; Li, Ruoning; Xu, Zhen; Li, Jie; Zhang, Xue; Li, Na; et al. (2021): Packing Biomolecules into Sierpiński Triangles with Global Organizational Chirality. ACS Publications. Collection. https://doi.org/10.1021/jacs.1c05949
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