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An Ionic Liquid Designed for Coordination Chemistry Revisited: Synthetic Routes and Safety Tests for 1‐Ethyl‐3‐methylimidazolium Perchlorate ([emim][ClO 4 ])
Author(s) -
Schmeisser Matthias,
Keil Philipp,
Stierstorfer Jörg,
König Axel,
Klapötke Thomas M.,
van Eldik Rudi
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201100529
Subject(s) - ionic liquid , chemistry , perchlorate , metathesis , halide , salt metathesis reaction , inorganic chemistry , ion , thermal stability , coordination complex , organic chemistry , catalysis , metal , polymer , polymerization
The colourless room‐temperature ionic liquid 1‐ethyl‐3‐methylimidazolium perchlorate, [emim][ClO 4 ], was revisited for reasons of its hydrophilic character and its weak coordinating ability. In this study, [emim][ClO 4 ] was synthesized from the cheaper ionic liquid 1‐ethyl‐3‐methylimidazolium ethyl sulfate, [emim][EtSO 4 ], by way of direct and indirect membrane‐assisted anion metathesis. Both synthetic methods, as alternatives to the metathesis of silver perchlorate and [emim] halides, are compared and discussed in detail. In addition, some physicochemical parameters were determined to characterize the ionic liquid. With respect to the hazardous nature of organic perchlorates, the thermal stability as well as the impact and friction sensitivity of [emim][ClO 4 ] were tested according to the UN Test Series 3a–3d.