{TAIL ~ This aspect} of the invention thus broadly provides an acrylate or methacrylate monomer bearing {HEAD ~ an ion exchange site} carrying a protonated fluoride anion of the formula (x F) 
{ TAIL ~ This aspect } of the invention thus broadly provides an acrylate or methacrylate monomer bearing { HEAD ~ an ion exchange site } carrying a protonated fluoride anion of the formula ( x F )
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