Hydrophobic hydration in aqueous acetic acid and formic acid solutions probed by high pressure

Charge-enhanced C–H–O interactions are investigated for imidazole hydrochloride/D2O mixtures. Based on the concentration-dependence results, the infrared spectra reveal a strong C–H band and a weak shoulder at ∼3065 cm−1. The pressure-dependence measurements also exhibit considerable spectral changes as the mixtures transform to high-pressure ices. The absorption intensity of the weak shoulder, located in the region of 3060–3090 cm−1, drastically increases as the pressure is elevated. Observation of this low frequency band provides the experimental evidence of C2–H–O hydrogen bonds in the aqueous imidazolium solutions. Ab initio calculation results, predicting the frequency shift of the C–H stretching vibrations as C–H–O is interacting via hydrogen bonding, are discussed. Structural identification of the hydrophobic isomers in infrared spectra seems to be complicated by the presence of more than one stable isomeric form.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Hydrophobic hydration in aqueous acetic acid and formic acid solutions probed by high pressure

Cited by 2 publications

References 30 publications

Experimental spectroscopic high-temperature high-pressure techniques for studying liquid and supercritical fluids

Experimental spectroscopic high-temperature high-pressure techniques for studying liquid and supercritical fluids

Evidence of charge-enhanced C–H–O interactions in aqueous protonated imidazole probed by high pressure infrared spectroscopy

Contact Info

Product

Resources

About