浙江大学黄飞鹤团队报道了单晶的纯有机独立的二维编织聚合物网络。相关研究成果发表在2024年7月18日出版的《自然—化学》。

宏观织物的美学和实用性继续鼓励化学家将分子编织成交织的图案，目的是在与起始材料相比时提供新的物理和化学性质。将纯有机分子线编织成完美的二维图案仍然是一个艰巨的挑战，尽管其可行性已在多个场合被提出。

该文中，研究人员描述了由BN键驱动的无瑕疵、纯有机、独立的二维编织聚合物网络的合成。获得了这种编织聚合物网络的单晶，并通过X射线衍射分析揭示了其明确的编织拓扑结构。使用Scotch Magic Tape从分层晶体上剥离编织聚合物网络的独立二维单层纳米片。通过集成低剂量和低温电子显微镜成像技术研究了纳米片的表面特征。这些发现证明了纯有机编织聚合物网络的精确构建，并突出了编织拓扑在二维有机材料中的应用的独特机会。

附：英文原文

Title: Single crystals of purely organic free-standing two-dimensional woven polymer networks

Author: Xiao, Ding, Jin, Zhitong, Sheng, Guan, Chen, Liya, Xiao, Xuedong, Shan, Tianyu, Wang, Jiao, Navik, Rahul, Xu, Jianping, Zhou, Lin, Guo, Qing-Hui, Li, Guangfeng, Zhu, Yihan, Stoddart, J. Fraser, Huang, Feihe

Issue&Volume: 2024-07-18

Abstract: The aesthetic and practicality of macroscopic fabrics continue to encourage chemists to weave molecules into interlaced patterns with the aim of providing emergent physical and chemical properties when compared with their starting materials. Weaving purely organic molecular threads into flawless two-dimensional patterns remains a formidable challenge, even though its feasibility has been proposed on several occasions. Herein we describe the synthesis of a flawless, purely organic, free-standing two-dimensional woven polymer network driven by dative BN bonds. Single crystals of this woven polymer network were obtained and its well-defined woven topology was revealed by X-ray diffraction analysis. Free-standing two-dimensional monolayer nanosheets of the woven polymer network were exfoliated from the layered crystals using Scotch Magic Tape. The surface features of the nanosheets were investigated by integrated low-dose and cryogenic electron microscopy imaging techniques. These findings demonstrate the precise construction of purely organic woven polymer networks and highlight the unique opportunities for the application of woven topologies in two-dimensional organic materials.

DOI: 10.1038/s41557-024-01580-3

Source: https://www.nature.com/articles/s41557-024-01580-3