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Updated: Nov 12, 2025

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A ferrocene-based pseudopeptide chiroptical switch
Saša Opačak1, Darko Babić, Berislav Perić
1Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia. Srecko.Kirin@irb.hr.
Abstract:
We present a double-stranded ferrocene pseudopeptide 2b which exhibits stimuli responsive chirality inversion triggered by solvent exchange or acid addition. Compound 2b exists as a mixture of self-assembled fast exchanging oligomers which macroscopically behave as a chiroptical switch with two stable states. The ferrocene group inversion results in a distinct CD signal in the visible part of the spectrum. The inversion is accomplished through a conformational change due to a rearrangement of hydrogen bonding forcing the rotation of ferrocene rings.
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