Direct Observation of Triple Ions in Aqueous Solutions of Nickel(II) Sulfate: A Molecular Link Between the Gas Phase and Bulk Behavior

Abstract

Electrospray ionization of aqueous nickel(II) sulfate provides direct experimental evidence for the formation of triple ions of the type [Ni2(SO4)(H2O)n]2+ and [Ni(SO4)2]2-, whose existence in aqueous solution has previously been proposed based on relaxation spectroscopy.

Keywords

• electrospray ionization
• infrared spectroscopy
• mass spectrometry
• microhydration
• nickel sulfate