金屬配合物介導手性3-氨基苯酚甲醛樹脂納米管的手性反轉
作者:
小柯機器人發布時間:2021/1/3 15:30:37
武漢紡織大學王棟團隊報導了金屬配合物介導手性3-氨基苯酚甲醛樹脂納米管的手性反轉。 相關研究成果於2020年12月27日發表在國際頂尖學術期刊《德國應用化學》。
手性納米材料的微觀結構和手性的精確調控對於調控其性能和特徵具有重要意義。
該文中,在對映體純模板體系中,通過外部金屬離子介導的超分子共模板法獲得螺旋3-氨基苯酚甲醛樹脂(APF)納米管和相應的具有可控手性和光學活性的碳納米管,其中適量的具有中等配位能力的Mn2+(Co2+或Ni2+)可以通過金屬配位逆轉苯甘氨酸基兩親性模板分子的空間排列。在不同的金屬離子體系中,不同的配位絡合物的堆積方式導致所獲得的螺旋APF具有不同的螺旋感(直徑和螺距)。
此外,這種金屬介入的配位模式還可以推廣到其他胺基螺旋聚合物合成體系中,為設計具有良好物理參數和性能的高質量手性納米材料鋪平了道路。
附:英文原文
Title: Handedness Inversion of Chiral 3‐Aminophenol Formaldehyde Resin Nanotubes Mediated by Metal Coordination
Author: Xinlin Zha, Yuanli Chen, Hui Fan, Yonggang Yang, Yi Xiong, Guilin Xu, Kun Yan, Yuedan Wang, Yi Xie, Dong Wang
Issue&Volume: 27 December 2020
Abstract: Precise adjustment of microstructure and handedness of chiral nanomaterials is important to regulate their properties and performance. Herein, helical 3‐aminophenol formaldehyde resin (APF) nanotubes and corresponding carbonaceous nanotubes with controllable handedness and optical activity were obtained via an external metal ion‐mediated supramolecular co‐templating method in an enantiomerically pure template system, in which an appropriate amount of Mn2+ (Co2+ or Ni2+) with moderate coordination abilities can reverse the spatial arrangement of the phenylglycine‐based amphiphilic template molecules through metal coordination. Different stacking modes of coordination complexes in disparate metal ion systems lead to diverse helical senses (diameter and pitch) of the obtained helical APF. In addition, this coordination mode of metal intervention can be applied to can be extended to other amine‐based helical polymer synthesis systems, which paves the way for the design of high‐quality chiral nanomaterials with satisfactory physical parameters and properties.
DOI: 10.1002/anie.202013790
Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202013790