SEARCH Articles Figures Tables Aromatic hydrocarbons, protonation Hydrocarbon polymers proton exchange membranes based Hydrocarbon proton exchange membrane Methylene group, proton hydrocarbons Proton exchange in measurement of hydrocarbon acidity Proton exchange membrane fuel cells hydrocarbon Proton-Metal Exchange with Acidic Hydrocarbons Protonation of Aromatic Hydrocarbons Surfactant, Water, Proton-Donating Material, and Hydrocarbon Quaternary Systems