SEARCH Articles Figures Tables A Simple Molecular Machine Operated by Photoinduced Proton Transfer Alkenes protonation by acid Chemical Ionization by Protonation Complications Caused by Protonation at the Wrong Site Conjugate acid-base pair Two species related to each other by the donating and accepting of a single proton Electrophilic attack by protons Elements Defined by Their Numbers of Protons Facilitation by protonation Formation of Monosubstituted Arenes by Proton Abstraction Irradiation by protons Measurement of a Neutron Energy Spectrum by Proton Recoil Nucleophilic Substitution by Proton Abstraction Proton Transfer Assisted by a Low-frequency Mode Excitation Proton exchange by electrophilic aromatic substitution Proton exchange by enolization, measurement Protonation Followed by Addition Protonation by Hydronium Ion Protonation by Water Protonation by trifluoroacetic Schemes Generation of carbon nucleophiles by proton abstraction Stabilisation of intermediates by proton transfer Structural Probing of Small RNAs by Comparative Imino Proton NMR Spectroscopy Tautomerism and Double Proton Transfer Mediated by Water Tautomerism formation of enols by proton transfer The Stability of a Nucleus Is Determined Primarily by Its Neutron-to-Proton Ratio The protonation of anthracene anion radical by phenol Water protonation by strong acids