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Reversible reduction drives anion ejection and C 60 binding within an FeII4L 6 cage

DOI: 10.1039/C9SC05728E DOI Help

Authors: Zhenpin Lu (University of Cambridge) , Tanya K. Ronson (University of Cambridge) , Jonathan R. Nitschke (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemical Science , VOL 111

State: Published (Approved)
Published: December 2019
Diamond Proposal Number(s): 15768

Open Access Open Access

Abstract: FeII4L6 tetrahedral cage 1 was prepared from a redox-active dicationic naphthalenediimide (NDI) ligand. The +20 charge of the cage makes it a good host for anionic guests, with no binding observed for neutral aromatic molecules. Following reduction by Cp2Co, the cage released anionic guests; subsequent oxidation by AgNTf2 led to re-uptake of anions. In its reduced form, however, 1 was observed to bind neutral C60. The fullerene guest was subsequently ejected following cage re-oxidation. The guest release process was found to be facilitated by anion-mediated transport from organic to aqueous solution. Cage 1 thus employs electron transfer as a stimulus to control the uptake and release of both neutral and charged guests, through distinct pathways.

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction


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