Volume 101, Issue 1 e1700265
Full Paper

Excimer-Based On-Off Bis(pyreneamide) Macrocyclic Chemosensors

Mahesh Vishe

Mahesh Vishe

Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Timothée Lathion

Timothée Lathion

Department of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Simon Pascal

Simon Pascal

Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Oleksandr Yushchenko

Oleksandr Yushchenko

Department of Physical Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Alexandre Homberg

Alexandre Homberg

Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Elodie Brun

Elodie Brun

Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Eric Vauthey

Eric Vauthey

Department of Physical Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Claude Piguet

Claude Piguet

Department of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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Jérôme Lacour

Jérôme Lacour

Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva, Switzerland

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First published: 23 November 2017
Citations: 17

Abstract

A series of bis(pyreneamide) macrocycles, synthesized in two steps from THF, THP, oxepane and 1,4-dioxane, are tested as chemosensors for a large range of mono-, di- and trivalent cations. In their native states, these macrocycles exhibit a strong excimer fluorescence that is quenched upon the addition of the metal ions (alkaline, alkaline earth, p-, d-, and f-block metals). UV-Vis spectrophotometric titrations, cyclic voltammetry, excimer fluorescence quenching, and transient absorption spectroscopy experiments helped characterize the On-Off changes occurring upon binding and demonstrate that the highest stability constants are obtained with divalent cations Ca2+ and Ba2+ specifically.

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