Tribological behavior and quantum chemical calculations of protic ionic liquids: synthesis, spectroscopic, and thermal properties

Authors

AHMET KARADAĞ
HÜSEYİN AKBAŞ
DURAN KARAKAŞ
KADİR CİHAN TEKİN
ERDEM KORKMAZER

DOI

10.3906/kim-1809-56

Abstract

Protic ionic liquids (PILs) were synthesized through a stoichiometric neutralization reaction between 2,2$' $-(ethylenedioxy)-bis(ethylamine) { Edbea} and various acids (formic, acetic, boric, decanoic, and gentisic acid). The PILs were characterized by elemental analyses, FTIR, $^{1}$H and $^{13}$C NMR spectroscopy, and thermogravimetric analysis. All the PILs except PIL3 were liquid at room temperature. The viscosity of the PILs (PIL1, 2, 4, 5) was measured using a cone-and-plate viscometer at ambient temperature. Quantum chemical calculations were used to explain the cation/anion ratio in the PILs. Reaction energies in the gas phase calculated at M062X/6-311$+$G(d,p) level were used to determine the cation/anion ratio. A sliding wear test was conducted at room temperature using an AA7075 disc specimen against a stationary 100Cr6 steel ball. The wear protection of PILs and 15W40 engine oil was determined by considering the volume loss of AA7075.

Keywords

Protic ionic liquid, tribology, spectroscopy, quantum chemical calculation

First Page

766

Last Page

777

Recommended Citation

KARADAĞ, AHMET; AKBAŞ, HÜSEYİN; KARAKAŞ, DURAN; TEKİN, KADİR CİHAN; and KORKMAZER, ERDEM (2019) "Tribological behavior and quantum chemical calculations of protic ionic liquids: synthesis, spectroscopic, and thermal properties," Turkish Journal of Chemistry: Vol. 43: No. 3, Article 4. https://doi.org/10.3906/kim-1809-56
Available at: https://journals.tubitak.gov.tr/chem/vol43/iss3/4