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Lithium-triggered Spontaneous Formation of Polyiodides in Room-Temperature Ionic Liquid-Alcohol Solutions

Hiroshi Abe, Tsukasa Tokita, Koichi Iwata, Shinichiro Ozawa

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5;212:255-261.

PMID: 30654323

Abstract:

In this study, the effect of alcohol on polyiodide formation in room-temperature ionic liquid (RTIL) was examined by time evolutions of Raman spectra in the low-frequency region and by color changes of the sample. The RTIL was 1-methyl-3-propylimidazolium iodide, [C3mim][I]. Polyiodides develop in [C3mim][I]‑lithium salt-ethanol solutions (Abe et al., Chem. Phys. 502 (2018) 72.). Without the external addition of iodine or without an external electric field, the irreversible transformation from I- to I3- indicates that charge unbalancing was promoted by lithium ion. Polyiodide formations were not induced by sodium or potassium ions. Strong alcohol effects were observed directly by the time-dependent Raman bands in the low-frequency region.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP119171185 1-Methyl-3-propylimidazolium iodide 1-Methyl-3-propylimidazolium iodide 119171-18-5 Price
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