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Strong, Localized, and Directional Hydrogen Bonds Fluidize Ionic Liquids
Author(s) -
Fumino Koichi,
Wulf Alexander,
Ludwig Ralf
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200803446
Subject(s) - hydrogen bond , ionic liquid , ionic bonding , chemistry , crystallography , coulomb , hydrogen , bond , chemical physics , molecule , organic chemistry , physics , ion , quantum mechanics , business , catalysis , finance , electron
Opposite effect of hydrogen bonding : Whereas molecular liquids are stabilized, ionic liquids can be fluidized by hydrogen bonds. Highly directional H bonds introduce “defects” into the Coulomb network resulting in reduced melting points and decreased viscosities. This is shown by the mid‐ and far‐FTIR spectra of two ionic liquids. (Structure in black: all H bonds are possible, structure in white: methyl group prevents one H bond.)