Comprehensive refractive index property for room-temperature ionic liquids

Shiro Seki, Seiji Tsuzuki, Kikuko Hayamizu, Yasuhiro Umebayashi, Nobuyuki Serizawa, Katsuhito Takei, Hajime Miyashiro

Research output: Contribution to journalArticlepeer-review

183 Citations (Scopus)


Refractive index, an optical property, and liquid density were measured for 17 types of room-temperature ionic liquids at various temperatures. Ab initio calculations were performed to yield theoretical polarizability of the respective ionic liquid composing ions. A highly linear correlation was found between the experimental refractive index and the predicted polarizability normalized in terms of the molar volume. This suggests that the electronic polarization of the ionic liquid composing ions predominantly contributes to the refractive index of the room-temperature ionic liquids.

Original languageEnglish
Pages (from-to)2211-2216
Number of pages6
JournalJournal of Chemical and Engineering Data
Issue number8
Publication statusPublished - 2012 Aug 9
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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