Premium
Highly Stable Single Crystals of Three‐Dimensional Porous Oligomer Frameworks Synthesized under Kinetic Conditions
Author(s) -
Hou Linxiao,
Shan Chuan,
Song Yanpei,
Chen Sifan,
Wojtas Lukasz,
Ma Shengqian,
Sun Qi,
Zhang Lin
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202103729
Subject(s) - hydrogen bond , oligomer , steric effects , imine , covalent bond , molecule , intermolecular force , chemistry , porosity , crystallography , materials science , chemical engineering , polymer chemistry , organic chemistry , catalysis , engineering
Various robust, crystalline, and porous organic frameworks based on in situ‐formed imine‐linked oligomers were investigated. These oligomers self‐assembled through collaborative intermolecular hydrogen bonding interactions via liquid–liquid interfacial reactions. The soluble oligomers were kinetic products with multiple unreacted aldehyde groups that acted as hydrogen bond donors and acceptors and directed the assembly of the resulting oligomers into 3D frameworks. The sequential formation of robust covalent linkages and highly reversible hydrogen bonds enforced long‐range symmetry and facilitated the production of large single crystals, with structures that were unambiguously determined by single‐crystal X‐ray diffraction. The unique hierarchical arrangements increased the steric hindrance of the imine bond, which prevented attacks from water molecules, greatly improving the stability. The multiple binding sites in the frameworks enabled rapid sequestration of micropollutant in water.