A <sup>19</sup>F Solvatomagnetic Comparison Method for the Determination of the <i>α</i><sub>1</sub> Scale of Solvent Hydrogen‐Bond Donation and Its Application to Deep Eutectic Solvents
ABSTRACT We develop a nonsolvatochromic comparison method for the determination of the α 1 scale of solvent hydrogen‐bond acidity by means of 19 F NMR spectrometry. We compare the 19 F chemical shifts of 4‐fluoro‐2‐methylpyridine (as a sensitive hydrogen‐bond acceptor probe) and of 4‐fluoronitrobenzene (as a chemically similar but less basic reference probe). This so‐called 19 F solvatomagnetic comparison method yields the hydrogen‐bonding contribution to δ ( 19 F)(4‐fluoro‐2‐methylpyridine) that is well correlated to α 1 values obtained from the solvatochromism of Reichardt's betaine dye. Therefore, this solvatomagnetic comparison method is applied to determine the α 1 values of 13 choline chloride–based deep eutectic solvents.
Authors
- Daniela Vuluga (ORCID: https://orcid.org/0000-0001-9601-0411)
- Sergui Mansour
- Julien Legros (ORCID: https://orcid.org/0000-0002-4807-7897)
- Christian Laurence
Institutions
- Centre National de la Recherche Scientifique (FR)
- Normandie Université (FR)
- Chimie et Interdisciplinarité, Synthèse, Analyse, Modélisation (FR)
- Polymères, Biopolymères, Surfaces (FR)
- Laboratoire COBRA (FR)
- Université de Rouen Normandie (FR)
- Institut National des Sciences Appliquées Rouen Normandie (FR)
- Nantes Université (FR)
Publication Details
- Journal
- Journal of Physical Organic Chemistry
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1002/poc.4665
- Citations
- 2
- Primary Topic
- Ionic liquids properties and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.21
Funders
- Indian National Science Academy
- Agence Nationale de la Recherche
- Centre National de la Recherche Scientifique
- Université de Rouen
- Institut Carnot Santé Animale
- Région Normandie
- European Regional Development Fund