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