Journal:Sci. China Mater.
Abstract:Binding of fluorescent molecules to the porous
matrix through noncovalent interactions will synergistically
expand their application spectrum. In this regard, we report
an integrative self-assembly of molecule 1 with benzothiadizole and 9,9-dihexyl fluorene units, and covalent organic frameworks (COFs) via an emulsion-modulated polymerization
process, within which molecules of 1 are able to interact with
the scaffolds of COFs through CH-π interactions. Thus the π-π
interactions between the fluorescent molecules are largely
suppressed, giving rise to their remarkable monomer-like
optical properties. Of particular interest is that, given by the
specific interaction between COFs and a nerve agent simulant
diethyl chlorophosphite (DCP), these assembled composites
show the ability of ultrasensitive detection of DCP with a
detection limit of ~40 ppb. Moreover, the present integrative
assembly strategy can be extended to encapsulate multiple
fluorescent molecules, enabling the assemblies with white light
emission. Our results highlight opportunities for the development of highly emissive porous materials by molecular selfassembly of fluorophores and molecular units of COFs.
First Author:巩彦君
Translation or Not:no
Date of Publication:2020-11-01
Included Journals:SCI
Date of Publication:2020-11-01