摘要
The crystalline sponge method is a pragmatic and promising strategy for molecular structure determination.However,the dominant metal-organic framework crystal sponge platforms always face poor chemical stability,especially solvent instability,hampering their application in a vaster domain.Herein,we report an ultrastable π-π stacked porous organic molecular framework which exhibits permanent porosity,high thermal stability,and good chemical resistance.It can efficiently implement an approach to molecular structure determination via a single-crystal-to-single-crystal transformation.This is the first example utilizing π-π stacked porous organic molecular framework as“crystalline sponge”to determine a wide variety of guests,ranging from hydrophilic to hydrophobic,and from aliphatic to aromatic,which complements the crystalline sponges based on the famous metal-organic frameworks.More importantly,it can achieve rapid structure determination of small molecules within 3 h.
基金
supported by the National Nature Science Foundation of China(grant nos.21871266,21731006,and 21403241)
the Strategic Priority Research Program of the Chinese Academy of Sciences(grant no.XDB20000000)
Key Research Program of Frontier Science CAS(grant no.QYZDY-SSW-SLH025)
Youth Innovation Promotion Association CAS.