Photoelectromagnetic Responsive Adaptive Porous Frameworks through Dynamic Covalent Chemistry of Tetraarylethylene-backboned Aryldicyanomethyl Radicals.
Angew Chem Int Ed Engl
; 62(22): e202301719, 2023 May 22.
Article
em En
| MEDLINE
| ID: mdl-36988141
ABSTRACT
Dynamic materials undergoing adaptive solid-state transitions are attractive for soft mechanics and information technology. Here, we report a novel porous framework system based on macrocyclic trimers assembled from open-shell tetraarylethylene building blocks with aryldicyanomethyl radicals as coupling linkers. Under mechanical, thermal, or chemical stimuli, the framework showed adaptability by activating conformational dynamics and radical-based transformations, thus displaying macroscopic responsiveness in terms of light absorption, luminescence, and magnetism. We studied the dynamic processes by variable-temperature nuclear magnetic resonance (VT-NMR), variable-temperature electron spin resonance (VT-ESR), and superconducting quantum interference device (SQUID) measurement and further established a proof-of-concept application for multi-modal information encryption. The strategy may open avenues for rational design of solid-state photoelectromagnetic dynamic materials by merging dynamic covalent coupling chemistry and functional aggregation principles.
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MEDLINE
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En
Ano de publicação:
2023
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Article