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Issue 4, 2020
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Reversible reduction drives anion ejection and C60 binding within an Fe II4L6 cage

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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.

Graphical abstract: Reversible reduction drives anion ejection and C60 binding within an FeII4L6 cage

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Supplementary files

Article information


Submitted
12 Nov 2019
Accepted
04 Dec 2019
First published
05 Dec 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 1097-1101
Article type
Edge Article

Reversible reduction drives anion ejection and C60 binding within an FeII4L6 cage

Z. Lu, T. K. Ronson and J. R. Nitschke, Chem. Sci., 2020, 11, 1097
DOI: 10.1039/C9SC05728E

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