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Chemicals, plastics and rubber industries

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Second harmonic generation-based coherent vibrational spectroscopy for a liquid interface under the nonresonant pump condition

Article Abstract:

The second harmonic generation-based coherent vibrational spectroscopy (SHG-CVS) as a method is developed to investigate the low-frequency dynamics at interfacial areas. It was demonstrated that the S/N ratio of the SHG-CVS with the TG configuration was remarkably superior to that with the conventional time-resolved SHG configuration, and the improved detection limit enabled to detect the low-frequency dynamics of coumarin 314 molecules at the air/water interface under the electronically nonresonant pump condition.

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Density formation of liquid/liquid interfacial regions using a quasi-elastic laser scattering method

Article Abstract:

A study was conducted to characterize the density estimation of liquid/liquid interfacial regions using a quasi-elastic laser scattering framework. An incident laser beam normal to the interface was scattered quasi-elastically using a Doppler shift by the capillary waves. Experimental results indicated that alcohol/water interfacial regions support smaller densities than bulk phases. Findings also showed that hydrophobic groups in alcohol and carboxylic acid molecules accommodate porosity in interfacial regions.

Analysis, Liquids, Lasers, Molecules, Water analysis

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Solvation of p-coumaric acid in water

Article Abstract:

Molecular dynamics based density functional theory (DFT) is used for studying the chromophore, p-coumaric acid (pCA), in different isomerization and protonation states in bulk solution. The presence of the chromophore has influenced the charge and polarization of the water molecules around it.

Density functionals, Density functional theory, Chromophores

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