AI Article Synopsis
- The study focuses on new supramolecular building blocks created by combining stilbene derivatives with benzimidazolium arms, exploring their behavior in water.
- The researchers investigated how these new compounds interact with cucurbit[n]urils and cyclodextrins, finding that two distinct binding complexes exist in equilibrium.
- It was demonstrated that the stilbene derivatives can undergo a reversible transformation between (E) and (Z) forms through UV light exposure and thermal treatment.
Article Abstract
Stilbene derivatives are well-recognised substructures of molecular switches based on photochemically and/or thermally induced (E)/(Z) isomerisation. We combined a stilbene motif with two benzimidazolium arms to prepare new sorts of supramolecular building blocks and examined their binding properties towards cucurbit[n]urils (n=7, 8) and cyclodextrins (β-CD, γ-CD) in water. Based on the H NMR data and molecular dynamics simulations, we found that two distinct complexes with different stoichiometry, i. e., guest@β-CD and guest@β-CD , coexist in equilibrium in a water solution of the (Z)-stilbene-based guests. We also demonstrated that the bis(benzimidazolio)stilbene guests can be transformed from the (E) into the (Z) form via UV irradiation and back via thermal treatment in DMSO.
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| http://dx.doi.org/10.1002/cphc.202000472 | DOI Listing |
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