RETRACTED ARTICLE: RAMAN SPECTROSCOPY OF STRONG HYDROGEN BONDS O–H⋯O

The work presents general ideas about the mechanisms determining the frequency and intensity of the scattering band of proton vibrations in the hydrogen bond O–H⋯O as it evolves from a weak bond to an extremely strong one. The Raman spectra of glycine phosphate and protonated dimethylformamide crystals containing strong and extremely strong hydrogen bonds are obtained in the temperature range of 5-300 K. It is shown that strong bonding is realized only for certain chemical states of donor and acceptor atoms and that low temperatures or high pressures are required to register proton vibrations. Schematic dependence between the frequency of proton vibrations and the rigidity of hydrogen bond O–H⋯O is discussed.