{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["10(48)"],"submitter":["Shah Y"],"pubmed_abstract":["Time-resolved optical Kerr effect (OKE) spectroscopy was employed to investigate the low-frequency vibrational dynamics of aqueous acetate solutions. While the isotropic OKE spectrum of neat water is broad and featureless, acetate solutions display a distinct band near 200 cm<sup>-1</sup>. This feature increases systematically with acetate concentration, is absent in methyl acetate, and shows negligible dependence on the countercation, establishing it as the vibrational fingerprint of acetate-water hydrogen bonds. Comparison with hydroxide solutions demonstrates that the band is spectrally distinct from other anion-water vibrations. Quantum-chemical calculations further support the assignment, reproducing polarized vibrational modes in the same frequency region. Together, these results resolve long-standing ambiguities in the interpretation of acetate hydration and highlight the power of ultrafast OKE spectroscopy to isolate solute-specific hydrogen-bond vibrations in aqueous solutions. Beyond spectroscopy, these findings have implications for understanding electrolyte behavior in energy storage systems (e.g., lithium-ion batteries) and biological buffering processes."],"journal":["ACS omega"],"pagination":["59840-59848"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12772401"],"repository":["biostudies-literature"],"pubmed_title":["Ultrafast Optical Kerr Effect Spectroscopy Reveals the Vibrational Fingerprint of Acetate-Water Hydrogen Bonds."],"pmcid":["PMC12772401"],"pubmed_authors":["Meech SR","Heisler IA","Shah Y"],"additional_accession":[]},"is_claimable":false,"name":"Ultrafast Optical Kerr Effect Spectroscopy Reveals the Vibrational Fingerprint of Acetate-Water Hydrogen Bonds.","description":"Time-resolved optical Kerr effect (OKE) spectroscopy was employed to investigate the low-frequency vibrational dynamics of aqueous acetate solutions. While the isotropic OKE spectrum of neat water is broad and featureless, acetate solutions display a distinct band near 200 cm<sup>-1</sup>. This feature increases systematically with acetate concentration, is absent in methyl acetate, and shows negligible dependence on the countercation, establishing it as the vibrational fingerprint of acetate-water hydrogen bonds. Comparison with hydroxide solutions demonstrates that the band is spectrally distinct from other anion-water vibrations. Quantum-chemical calculations further support the assignment, reproducing polarized vibrational modes in the same frequency region. Together, these results resolve long-standing ambiguities in the interpretation of acetate hydration and highlight the power of ultrafast OKE spectroscopy to isolate solute-specific hydrogen-bond vibrations in aqueous solutions. Beyond spectroscopy, these findings have implications for understanding electrolyte behavior in energy storage systems (e.g., lithium-ion batteries) and biological buffering processes.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Dec","modification":"2026-06-06T13:01:45.309Z","creation":"2026-05-30T03:11:16.958Z"},"accession":"S-EPMC12772401","cross_references":{"pubmed":["41502717"],"doi":["10.1021/acsomega.5c09879"]}}