A Picosecond Time‐Resolved Spectroscopic Investigation of the Effect of pH on Morin Fluorescence,ChemPhysChem

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A Picosecond Time‐Resolved Spectroscopic Investigation of the Effect of pH on Morin Fluorescence
ChemPhysChem ( IF 2.3 ) Pub Date : 2020-09-29 , DOI: 10.1002/cphc.202000608
Yevheniia SMORTSOVA ₁ , Jérémy GAILLARD ₂ , François-Alexandre MIANNAY ₃ , Jean-Paul CORNARD ₄

Affiliation

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.

中文翻译：

pH值对Morin荧光影响的皮秒时间分辨光谱研究

在这项工作中，我们首次通过皮秒时间分辨荧光研究了在不同pH值下的MeOH中morrin的含量。我们确定了在低pH和高pH下负责荧光的两种物质。首次通过实验观察到溶剂化的morin-溶剂氢键复合物。我们还给出了典型的荧光光谱以及可能的发射物质的荧光寿命。在这项工作中，我们提出了有关游离香豆素对荧光的贡献的新见解。我们希望这些新数据能够提高使用荧光信号进行的阳离子：morin络合物滴定解释的准确性。

更新日期：2020-09-29

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