Reversible pH‐Controlled Catenation of a Benzobisimidazole‐based Tetranuclear Rectangle - Archive ouverte HAL Access content directly
Journal Articles Chemistry - A European Journal Year : 2021

Reversible pH‐Controlled Catenation of a Benzobisimidazole‐based Tetranuclear Rectangle

David Canevet
Magali Allain
Marc Sallé
Sébastien Goeb
  • Function : Author

Abstract

The development of methodologies to control on demand and reversibly supramolecular transformations from self-assembled metalla-structures requires the rational design of architectures able to answer to an applied stimulus. While solvent, concentration, guest, light, addition of a chemical have been largely explored to provide these transformations, the case of pH sensitive materials is less described. Herein, we report the first example of a pH-triggered dissociation of a coordination-driven self-assembled interlocked molecular link. It incorporates a pH sensitive benzobisimidazolebased ligand that can be selectively protonated on its bisimidazole moieties. This generates intermolecular electrostatic repulsions that reduces drastically the stability of the interlocked structure, leading to its dissociation without any sign of protonation of the basic pyridine moieties involved in the coordination bonds. Importantly, the dissociation process is reversible through addition of a base.
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Dates and versions

hal-03335302 , version 1 (06-09-2021)

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Maksym Dekhtiarenko, Simon Pascal, Mourad Elhabiri, Valérie Mazan, David Canevet, et al.. Reversible pH‐Controlled Catenation of a Benzobisimidazole‐based Tetranuclear Rectangle. Chemistry - A European Journal, 2021, 27 (64), pp.15922-15927. ⟨10.1002/chem.202103039⟩. ⟨hal-03335302⟩
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