Changes in the (31)P NMR chemical shift of tri-n-butylphosphine oxide have been measured as function of solvent composition in a number of binary solvent mixtures. The data were analysed using a model that separates the contributions of specific H-bond interactions with the first solvation shell and the non-specific effects of the bulk solvent on the chemical shift. This allowed measurement of ...

The solvatochromic characteristics of flavone and 7-hydroxyflavone were investigated in neat and binary solvent mixtures. The spectral shifts of these solutes were correlated with the Kamlet and Taft parameters (α, β and π*) using linear solvation energy relationships. The multiparametric analysis indicates that both specific hydrogen bond donor ability and non-specific dipolar interactions of ...

Kosmotropic cosolvents added to an aqueous solution promote the aggregation of hydrophobic solute particles, while chaotropic cosolvents act to destabilise such aggregates. We discuss the mechanism for these phenomena within an adapted version of the two-state Muller-Lee-Graziano model for water, which provides a complete description of the ternary water/cosolvent/solute system for small solute...

In an acetone solution containing small portions of naphthalene the latter is adsorbed preferentially to poly(methylmethacrylate-co-phenylvinylketone). Evidence for preferential solvation is inferred from intrinsic viscosity data as well as from the halflife of the change of light scattering intensity after fragmentation of the macromolecules by a 25 ns flash of 347 nm light from a ruby laser.

Nanometer-Scale Phase Separation and Preferential Solvation in THF Water Mixtures: Ultrafast Electron Hydration and Recombination Dynamics Following CTTS Excitation of I Arthur E. Bragg,* Godwin U. Kanu, and Benjamin J. Schwartz* Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2680, United States Department of Chemistry and Biochemistry, University of California...