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- W3206081771 abstract "The present work uses ATR-FTIR spectroscopy assisted by simulations in explicit solvent and frequency calculations to investigate the supramolecular structure of carboxylate alkali-metal ion pairs in aqueous solutions. ATR-FTIR spectra in the 0.25-4.0 M concentration range displayed cation-specific behaviors, which enabled the measurement of the appearance concentration thresholds of contact ion pairs between 1.9 and 2.6 M depending on the cation. Conformational explorations performed using a non-local optimization method associated to a polarizable force-field (AMOEBA), followed by high quantum chemistry level (RI-B97-D3/dhf-TZVPP) optimizations, mode-dependent scaled harmonic frequency calculations and electron density analyses, were used to identify the main supramolecular structures contributing to the experimental spectra. A thorough analysis enables us to reveal the mechanisms responsible for the spectroscopic sensitivity of the carboxylate group and the respective role played by the cation and the water molecules, highlighting the necessity of combining advanced experimental and theoretical techniques to provide a fair and accurate description of ion pairing." @default.
- W3206081771 created "2021-10-25" @default.
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- W3206081771 date "2021-10-12" @default.
- W3206081771 modified "2023-10-08" @default.
- W3206081771 title "Ion Pair Supramolecular Structure Identified by ATR‐FTIR Spectroscopy and Simulations in Explicit Solvent**" @default.
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- W3206081771 doi "https://doi.org/10.1002/cphc.202100565" @default.
- W3206081771 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34637180" @default.
- W3206081771 hasPublicationYear "2021" @default.
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