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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

IMPACT FACTOR 2018: 0.975
5-year IMPACT FACTOR: 1.021

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.327
Source Normalized Impact per Paper (SNIP) 2018: 0.391

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Volume 220, Issue 10


Water Vibrational Bands as a Polarity Indicator in Ionic Liquids

Alexander Wulf / Thorsten Köddermann / Christiane Wertz / Andreas Heintz / Ralf Ludwig
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/zpch.2006.220.10.1361

With a combination of FTIR and ab initio calculations we studied the structure of water molecules confined in ionic liquids (ILs). Most of the single water molecules are H-bonded in double donor (DD) configurations either to one anion or to two anions in a 1 : 2 complex. We show that the vibrational stretching modes of such water molecules can be used as sensitive probes for the polarity of the ILs, expressed through dielectric constants. We apply our method to imidazolium salts of the third and fourth generation. We discuss the anion- and cation-dependence and compare our results with other polarity parameters.

: Ionic Liquids; Polarity; Infrared Spectroscopy; Ab Initio Calculations

About the article

Received: 2006-07-10

Accepted: 2006-08-08

Published Online: 2009-09-25

Published in Print: 2006-10-01

Citation Information: Zeitschrift für Physikalische Chemie, Volume 220, Issue 10, Pages 1361–1376, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1524/zpch.2006.220.10.1361.

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