Fluoroiodate
A fluorooxoiodate or fluoroiodate is a chemical compound or ion derived from iodate, by substituting some of the oxygen by fluorine. They have iodine in the +5 oxidation state. The iodine atoms have a stereochemically active lone-pair of electrons. Many are non-centrosymmetric, and are second harmonic generators (SHG) of intense light shining through them. They are under investigation as materials for non-linear optics, such as for generating ultraviolet light from visible or infrared lasers.
Different ions include [IOF4]−, [IO2F2]−, [IO3F]2−, and [I2O5F2]2−.
They are distinct from the fluoride iodates which are mixed anion compounds that do not have fluorine-iodine bonds.
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