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To test the reactivity of gaseous 18F-AcF in radiofluorination, bis(4-tert-butylphenyl)iodonium perfluoro-1-butanesulfonate was radiofluorinated with anhydrous 18F-CsF (generated from 18F-AcF and 20 mg Cs2CO3) in 0.3 mL anisole. The results supported the high reactivity for 18F-fluoride derived from 18F-AcF [1].    Bis(4-tert-butylphenyl)iodonium perfluoro-1-butanesulfonate is a photoinitiator (PI). The photoinitiator (PI) mechanisms are radical and cationic. In the cationic PI system, light is absorbed, causing heterolytic and homolytic cleavage that forms a cationic portion (labeled in green) and anionic portion (labeled in pink). The generated molecules are reactive with monomers, forming an acid and free radicals, propagating polymerization[2].    

[1] Huailei Jiang , Timothy R. DeGrado, Stephen G. DiMagno . “Production and transport of gaseous 18F-synthons: 18F-acyl fluorides.” Journal of Fluorine Chemistry 180 (2015): Pages 181-185.
[2] Megan Carve, &Donald Wlodkowic. “3D-Printed Chips: Compatibility of Additive Manufacturing Photopolymeric Substrata with Biological Applications.” Micromachines 9 2 (2018).