High‐Precision Size Recognition and Separation in Synthetic 1D Nanochannels

Covalent organic frameworks (COFs) allow elaborate manufacture of ordered one‐dimensional channels in the crystal. We defined a superlattice of COFs by engineering channels with a persistent triangular shape and discrete pore size. We observed a size‐recognition regime that is different from the cha...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie International Edition 2019-10, Vol.58 (44), p.15922-15927
Main Authors: Wang, Ping, Chen, Xinyi, Jiang, Qiuhong, Addicoat, Matthew, Huang, Ning, Dalapati, Sasanka, Heine, Thomas, Huo, Fengwei, Jiang, Donglin
Format: Article
Language:English
Subjects:
Ambient temperature
Apertures
covalent organic frameworks
Molecular chains
molecular recognition
Nanochannels
nanostructures
Pore size
Porosity
Separation
Shape recognition
Spectroscopy
Superlattices
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Covalent organic frameworks (COFs) allow elaborate manufacture of ordered one‐dimensional channels in the crystal. We defined a superlattice of COFs by engineering channels with a persistent triangular shape and discrete pore size. We observed a size‐recognition regime that is different from the characteristic adsorption of COFs, whereby pore windows and walls were cooperative so that triangular apertures sorted molecules of one‐atom difference and notch nanogrooves confined them into single‐file molecular chains. The recognition and confinement were accurately described by sensitive spectroscopy and femtosecond dynamic simulations. The resulting COFs enabled instantaneous separation of mixtures at ambient temperature and pressure. This study offers an approach to merge precise recognition, selective transport, and instant separation in synthetic 1D channels. The right channel: Open 1D channels were able to recognize differences in molecular size when the pores were designed with a triangular shape and discrete size in covalent organic frameworks. This finding introduces the possibility of using 1D channels for selective transport and instant molecular separation with infinite selectivity (see picture).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201909851