Fluorination strategy toward chemical and functional modification.

Fluorination is a powerful strategy for chemical and functional modification of materials because the introduction of fluorine atoms can alter the physical, chemical and electronic properties of a material and thereby result in improved key properties. The fluorination strategy has enabled the modification of material chemistry and properties at the microscale of fluorooxysalts, providing a diversity previously unattainable in oxysalts. Here, we review the recent progress, status, future opportunities, and challenges with concern of the chemical and material aspects for fluorooxysalts that contain fluorine-involved M-F bonds. The entire evolution of fluorooxysalts-from synthesis to structural chemistry and their functionality-is examined from the perspective of the polyanion. This review paper details how qualities of optical crystals, battery materials, and inorganic framework materials can be greatly enhanced by understanding the chemistry of inorganic fluorooxysalts. This review centers on the critical role that fluorine plays in the synthesis, characterization, and physical properties of these materials.