Investigation of Ionic Liquids Under Bi-ion and Bi-cluster Ions Bombardment by ToF-SIMS

Markus Holzweber, Ernst Pittenauer, Herbert Hutter

J Mass Spectrom. 2010 Oct;45(10):1104-10.

PMID: 20690159

Abstract:

A systematic study of five different imidazolium-based room temperature ionic liquids, 1-butyl-3-methylimidazolium acetate, 1-butyl-3-methylimidazolium nitrate, 1-butyl-3-methylimidazolium iodide, 1-butyl-3-methylimidazolium hexafluorophosphate and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide were carried out by means of time-of-flight secondary ion mass spectrometry (ToF-SIMS) in positive and negative ion mode. The compounds were measured under Bi-ion and Bi-cluster ions (Bi(2-7)(+), Bi(3, 5)(2+)) bombardment, and spectral information and general rules for the fragmentation pattern are presented. Evidence for hydrogen bonding, due to high molecular secondary cluster ions, could be found. Hydrogen bonding strength could be estimated by ToF-SIMS via correlation of the anionic yield enhancement with solvent parameters.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP179075888	1-Butyl-3-methylimidazolium nitrate		179075-88-8	Price