hydrogen bond - 5 Raman spectra 3 водневий зв’язок 3 AIM 1 DFT 1 DFT method 1 H-зв’язки 1 IЧ спектри 1 aggregate structure 1 aggregation of molecules 1 blue shift 1 complex formation energy 1 dimer 1 dipole moment 1 electrostatic origin 1 ethylene glycol 1 frequency 1 frequency shift 1 harmonic and anharmonic frequencies 1 hydrogen bond length 1 hydrogen valence vibrations of a water molecule 1 intermolecular hydrogen bond 1 intermolecular interaction 1 intermolecular interaction energy 1 intramolecular interaction 1 local structure 1 molecular dynamics 1 molecule 1 monomer 1