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A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
Published on: April 28, 2023
A Picosecond Time-Resolved Spectroscopic Investigation of the Effect of pH on Morin Fluorescence
Yevheniia Smortsova1, Jérémy Gaillard1, François-Alexandre Miannay1
1Univ. Lille, CNRS, UMR 8516 LASIRE-LAboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, 59655, Villeneuve d'Ascq Cedex, France.
Abstract:
In this work, we investigated for the first time morin in MeOH at different pH values by picosecond time-resolved fluorescence. We identified the two species responsible for the fluorescence at low and high pH. The solvated morin-solvent hydrogen-bonded complex has been experimentally observed for the first time. We give also the typical fluorescence spectra as well as the fluorescence lifetimes of the probable emitting species. In this work we put forward new insights concerning the contribution of free morin to the fluorescence. We hope that these new data improve the accuracy of the interpretation of the cation:morin complexes titration using fluorescence signal.
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