An Azobenzene-Bipyridinium Derivative as a Component in the Construction of Photoresponsive Pseudorotaxanes

Abstract

We describe the synthesis and characterization of a bipyridinium derivative conjugated with two azobenzene groups (Azo₂Bpy²⁺). The design maintains the ability of the photoswitches to undergo E to Z isomerization upon irradiation to generate a mixture of EE, EZ and ZZ isomers. Moreover, Azo₂Bpy²⁺ is able to undergo self-assembly with dibenzo[24]crown-8 ether to generate [3]-pseudorotaxanes, driven by the strong cooperative effects, for all its geometric isomers.

Key words

molecular devices - crown ethers - photochemistry - supramolecular chemistry - photoisomerization

Publikationsverlauf

Eingereicht: 08. März 2025

Angenommen nach Revision: 03. April 2025

Artikel online veröffentlicht:
07. Mai 2025

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