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Issue 26, 2021
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Damming an electronic energy reservoir: ion-regulated electronic energy shuttling in a [2]rotaxane

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Abstract

We demonstrate the first example of bidirectional reversible electronic energy transfer (REET) between the mechanically bonded components of a rotaxane. Our prototypical system was designed such that photoexcitation of a chromophore in the axle results in temporary storage of electronic energy in a quasi-isoenergetic “reservoir” chromophore in the macrocycle. Over time, the emissive state of the axle is repopulated from this reservoir, resulting in long-lived, delayed luminescence. Importantly, we show that cation binding in the cavity formed by the mechanical bond perturbs the axle chromophore energy levels, modulating the REET process, and ultimately providing a luminescence read-out of cation binding. Modulation of REET processes represents an unexplored mechanism in luminescent molecular sensor development.

Graphical abstract: Damming an electronic energy reservoir: ion-regulated electronic energy shuttling in a [2]rotaxane

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Article information


Submitted
21 Apr 2021
Accepted
04 Jun 2021
First published
04 Jun 2021

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

Chem. Sci., 2021,12, 9196-9200
Article type
Edge Article

Damming an electronic energy reservoir: ion-regulated electronic energy shuttling in a [2]rotaxane

S. Yu, A. Kupryakov, J. E. M. Lewis, V. Martí-Centelles, S. M. Goldup, J. Pozzo, G. Jonusauskas and N. D. McClenaghan, Chem. Sci., 2021, 12, 9196 DOI: 10.1039/D1SC02225C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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