Topology modulation of 2D covalent organic frameworks via a “two-in-one” strategy,Nanoscale

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Topology modulation of 2D covalent organic frameworks via a “two-in-one” strategy
Nanoscale ( IF 5.8 ) Pub Date : 2021-11-01 , DOI: 10.1039/d1nr05758h
Ziqiang Zhao _{1,

2} , Jinwei Zhao ₁ , Simeng Zhang ₁ , Guang Zhang ₁ , Weiben Chen ₁ , Zongfan Yang ₁ , Ting Zhang ₁ , Long Chen ₁

Affiliation

Topology modulation of covalent organic frameworks (COFs) still remains barely explored, probably due to the lack of appropriate building blocks. A “two-in-one” strategy applies bifunctional monomers to endow ideal stoichiometry and has recently demonstrated great potential in the facile preparation of highly crystalline two-dimensional (2D) COFs with different topologies. Herein, we employ this approach to modulate the topology of 2D COFs by varying the solvents or the monomer concentrations. To our delight, 2D COFs featuring a Kagome (kgm) lattice with both hexagonal and triangular dual pores (DP) or featuring a rhombic square (sql) single pore (SP) structure can be selectively formed by varying the solvents. Furthermore, adjusting the monomer concentrations also successfully tuned the topology of the COFs. In addition, the highly porous dual-pore COF showed potential applications for controlled drug delivery.

中文翻译：

通过“二合一”策略对二维共价有机框架进行拓扑调制

共价有机框架 (COF) 的拓扑调制仍然很少被探索，可能是由于缺乏合适的构建模块。“二合一”策略应用双功能单体赋予理想的化学计量学，并且最近在具有不同拓扑结构的高结晶二维 (2D) COF 的简便制备方面表现出巨大潜力。在此，我们采用这种方法通过改变溶剂或单体浓度来调节 2D COF 的拓扑结构。令我们高兴的是，具有六角形和三角形双孔 (DP)的 Kagome ( kgm ) 晶格或具有菱形正方形 ( sql) 单孔 (SP) 结构可以通过改变溶剂选择性地形成。此外，调整单体浓度也成功地调整了 COF 的拓扑结构。此外，高度多孔的双孔 COF 显示出在受控药物递送方面的潜在应用。

更新日期：2021-11-23

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