Partitioning the interlayer space of covalent organic frameworks by embedding pseudorotaxanes in their backbones
- 1 December 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Chemistry
- Vol. 12 (12), 1115-+
- https://doi.org/10.1038/s41557-020-00562-5
Abstract
Mono- or few-layer sheets of covalent organic frameworks (COFs) represent an attractive platform of two-dimensional materials that hold promise for tailor-made functionality and pores, through judicious design of the COF building blocks. But although a wide variety of layered COFs have been synthesized, cleaving their interlayer stacking to obtain COF sheets of uniform thickness has remained challenging. Here, we have partitioned the interlayer space in COFs by incorporating pseudorotaxane units into their backbones. Macrocyclic hosts based on crown ethers were embedded into either a ditopic or a tetratopic acylhydrazide building block. Reaction with a tritopic aldehyde linker led to the formation of acylhydrazone-based layered COFs in which one basal plane is composed of either one layer, in the case of the ditopic macrocyclic component, or two adjacent layers covalently held together by its tetratopic counterpart. When a viologen threading unit is introduced, the formation of a host-guest complex facilitates the self-exfoliation of the COFs into crystalline monolayers or bilayers, respectively.This publication has 37 references indexed in Scilit:
- Covalent organic frameworks (COFs): from design to applicationsChemical Society Reviews, 2012
- Metal–organic frameworks with dynamic interlocked componentsNature Chemistry, 2012
- Synthesis of Well-Ordered COF Monolayers: Surface Growth of Nanocrystalline Precursors versus Direct On-Surface PolycondensationACS Nano, 2011
- Delamination of Layered Covalent Organic FrameworksSmall, 2011
- Docking in Metal-Organic FrameworksScience, 2009
- The chemistry of the mechanical bondChemical Society Reviews, 2009
- Designed Synthesis of 3D Covalent Organic FrameworksScience, 2007
- Porous, Crystalline, Covalent Organic FrameworksScience, 2005
- Molecular meccano. 1. [2]Rotaxanes and a [2]catenane made to orderJournal of the American Chemical Society, 1992
- Complexation of Paraquat by a bisparaphenylene-34-crown-10 derivativeJournal of the Chemical Society, Chemical Communications, 1987