功能纳米组装体中多面体低聚倍半硅氧烷的旋压

作者：小柯机器人 发布时间：2021/2/5 13:55:41

山东大学邢鹏遥团队提出在功能纳米组装体中多面体低聚倍半硅氧烷的旋压策略。 相关研究成果发表在2021年2月02日出版的《德国应用化学》。

将具有原子精度的巨分子纳米粒子引入手性纳米组装体中，有助于制备具有超分子手性的功能有序相，然而这仍然是一个主要的谜团。

该课题组研究人员报道了第一个多面体低聚倍半硅氧烷(POSS)衍生物自组装成定义明确的手性纳米组装体的例子。POSS与N末端芳香族氨基酸共价缀合，氨基酸会自组装成纳米螺旋，通过溶剂极性调节并具有明确手性的扭曲。手性纳米组装体表现出活跃的手性光学响应，包括棉花效应和圆极化发光效应。

这种手性体系能够通过电荷-转移相互作用将客体分子包括在内，从而进一步调节自组装结构、手性活性和发光颜色。独特的共组装系统应用于多个发光显示器即时信息加密和存储。

该研究工作为POSS分子自组装功能手性材料的设计提供了新的思路。

附：英文原文

Title: Spinning Polyhedral Oligosilsesquioxanes in Functional Nanoassemblies

Author: Pengyao Xing, Shuguo An, Aiyou Hao

Issue&Volume: 02 February 2021

Abstract: Incorporation of giant molecular nanoparticles with atomic precision into chiral nanoassemblies facilitates the fabrication of functional ordered phases with supramolecular chirality, which however remains major mysterious. Here we report the first example of polyhedral oligosilsesquioxane (POSS) derivatives that self‐assembled into well‐defined chiral nanoassemblies. POSS was covalently conjugated to N‐terminal aromatic amino acids, which self‐assembled into nanohelices and twists with explicit handedness tuned by solvent polarity. Chiral nanoassemblies showed active chiroptical responses including Cotton effects and circularly polarized luminescence. Such chiral systems were capable of including guest molecules by charge‐transfer interaction, whereby self‐assembled structures, chiroptical activities and luminescent colors could be further modulated. The unique coassembly systems were applied for instant information encryption and storage with multiple luminescent displays. This work paves a new protocol to design functional chiral materials of POSS via molecular self‐assembly.

DOI: 10.1002/anie.202100044

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