Effect Of Hydrogen-Oxygen Functional Groups On Raman Scattering Of Dimethyl Sulfoxide Molecules

As a very important solvent in organic chemistry and fine chemical technology,it has been the object of basic research in various fields.Due to the multifunctional nature of the dimethyl sulfoxide molecule,the mixed solution of dimethyl sulfoxide exhibits complex hydrogen bonding behavior.Since the advent of lasers,Raman spectroscopy has been an effective method for identifying intermolecular interactions.According to the basic principle of Raman scattering,this paper has investigated the influence of hydrogen-oxygen functional groups on the structure and properties of dimethyl sulfoxide.?1?First,we use Nd:YAG pulsed laser at 532 nm to study the influence of dynamic high pressure on the structure and properties of heavy water.Due to the interaction of extra electrons with heavy water,three peaks?ice-?structure?appeared at laser output energy of 140 mJ.Under different energy excitations,the ice phase structure of heavy water is transformed and the peak of the wavenumber around 2400cm^-1exhibits energy-dependent behavior.Secondly,we used spontaneous Raman scattering to study the changes in the structure of heavy water in a cooling environment.According to the experimental results,due to the interaction between the electric field generated by silicon dioxide and hydrogen bonding,the ice phase structure transformation is achieved at different temperatures.?2?We used 514.5 nm radiation to study the effect of dimethyl sulfoxide and hydroxide functional group-containing solutions?water,methanol,and ethanol?on the hydrogen bonding network structure.The experimental results show that the anti-symmetric stretching of the CSC bond in dimethyl sulfoxide is always more obvious than the frequency shift of symmetric stretching.This phenomenon is caused by the CSC bond with a 97°bond angle.First,we studied the effect of the hydroxyl group in the methanol molecule on the molecular structure of dimethyl sulfoxide.The experimental results show that the blue-shifted CSC bond and CH₃bond stretching vibration in dimethyl sulfoxide and the red-shifted CO bond in methanol In the blue-shifted OH bond stretching mode,these Raman frequency changes are attributed to the intermolecular interaction forces in HBs.Secondly,through the Raman spectrum of the mixed solution of dimethyl sulfoxide and water,we found that when the water mole fraction is about 0.7,the Raman frequency shows a sudden red shift.This deviation has now been confirmed to be caused by the"iceberg effect".Finally,according to the study of Raman spectroscopy of the binary mixed solution of dimethyl sulfoxide and ethanol,the experiment found that the methyl group in methanol can form a hydrogen bond with the hydroxyl group in the water molecule,thereby strengthening the hydrogen bond in the water molecule.