A spectral-shift study of the hydrophobic hydration of benzene

A method for study of charge-transfer interactions between solute molecules and solvent based on the comparison of the ratios of spectral shifts of different electronic transitions in solute molecules in chemically inert solvent is proposed. The method is applicable to molecules that do not change their dipole moment on excitation. As an example, a presence of charge transfer interactions in higher electronic states of aromatic hydrocarbons (benzene, phenanthrene, and naphthalene) dissolved in water and alcohols was demonstrated.

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“…The value of ξ may be estimated from comparison of the spectral shifts in solutions with the known values of R and f(n) [8].…”

Section: Treatment Of Spectral Shiftsmentioning

confidence: 99%

Effects of partial charge-transfer solute – solvent interactions in absorption spectra of aromatic hydrocarbons in aqueous and alcoholic solutions

2013

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Correcting the microscopic coefficient of surface tension of associated liquids

Ar'ev

2013

Russ. J. Phys. Chem.

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Taking into Account Density Fluctuations in a Solvent in a Model of Dissolution

Ar'ev¹

2019

OJPC

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Earlier it was shown by different authors that there are cavities (vacancies, holes) in any liquid. The cavities should play a prominent role in dissolution processes. Nevertheless this fact was ignored in previous model of dissolution. The sizes of the cavities in different solvents containing benzene molecules were determined using solvent induced spectral shift method. The measurements of S 1 ←S 0 benzene transition spectral shifts permit to conclude that 1) macroscopic excess volumes play an almost negligible role in processes of benzene dissolution in very different solvents and 2) the minimal size of the cavity in water able to accommodate benzene molecule coincides with the solute size. Generalization of this conclusion to other nonpolar aromatics leads to evaluation contraction of the solutes under aqueous solvent influence permits to predict the solubility values of other aromatics in water and to evaluate effect of enhancement hydrate cell around these molecules on solubility.

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A spectral-shift study of the hydrophobic hydration of benzene

Cited by 3 publications

References 24 publications

Effects of partial charge-transfer solute – solvent interactions in absorption spectra of aromatic hydrocarbons in aqueous and alcoholic solutions

Effects of partial charge-transfer solute – solvent interactions in absorption spectra of aromatic hydrocarbons in aqueous and alcoholic solutions

Correcting the microscopic coefficient of surface tension of associated liquids

Taking into Account Density Fluctuations in a Solvent in a Model of Dissolution

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