CC BY-NC-ND 4.0 · Organic Materials 2022; 4(03): 127-136
DOI: 10.1055/a-1927-8947
Supramolecular Chemistry
Original Article

Development of Rotaxanes as E-Field-Sensitive Superstructures in Plasmonic Nano-Antennas

a   Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
,
b   Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
,
René Kullock
b   Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
,
Yves Aeschi
a   Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
,
b   Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
,
a   Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
c   Institute for Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
d   Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University (SYSU), Guangzhou 510275, P. R. of China
› Author Affiliations


Abstract

We present the concept of electrostatic field-driven supramolecular translation within electrically connected plasmonic nano-antennas. The antenna serves as an anchoring point for the mechanically interlocked molecules, as an electrode for the electrostatic field, and as an amplifier of the antenna-enhanced fluorescence. The synthesis of a push–pull donor–π–acceptor chromophore with optical properties aligned to the antenna resonance is described and its immobilization on the surface is demonstrated. Photoluminescence experiments of the chromophore on a gold nano-antenna are shown, highlighting the molecule–antenna coupling and resulting emission intensity increase. The successful synthesis of an electrostatic field-sensitive [2]rotaxane in water is described and the tightrope walk between functionality and water solubility is illustrated by unsuccessful designs. In solution, an enhanced fluorescence quantum yield is observed for the chromophore comprising the mechanically interlocked [2]rotaxane in water and DMSO compared to the reference rod, ideal for future experiments in plasmonic nano-antennas.

Primary Data

The primary data generated during this study are available at: https://doi.org/10.5281/zenodo.6777943.



Publication History

Received: 01 July 2022

Accepted after revision: 14 August 2022

Accepted Manuscript online:
22 August 2022

Article published online:
20 September 2022

© 2022. The authors. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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