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

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Published in Helvetica chimica acta. 2018, vol. 101, no. 1, e1700265
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.
Keywords Cation sensingConformationsExcimerMacrocyclePyrene
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Research groups Groupe Lacour
Groupe Piguet
Groupe Vauthey
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VISHE, Mahesh et al. Excimer-Based On-Off Bis(pyreneamide) Macrocyclic Chemosensors. In: Helvetica Chimica Acta, 2018, vol. 101, n° 1, p. e1700265. doi: 10.1002/hlca.201700265 https://archive-ouverte.unige.ch/unige:101609

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Deposited on : 2018-01-23

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