Rotational diffusion of organic solutes in surfactant-block copolymer micelles: Role of electrostatic interactions and micelles hydration

Article Abstract:

The rotational diffusion of a cationic solute rhodamine 110 and a neutral solute 2,5-dimethyl-1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DMDPP) is examined in the surfactant-block copolymer system of sodium dodecyl sulfate (SDS) and poly[(ethylene oxide).sub.20]-poly[(propylene oxide).sub.70]-poly[(ethylene oxide).sub.20] (P123). The similarities in the average reorientation times of rhodamine 110 and DMDPP from 1-5 mole ratio of SDS to P123 have shown that both solutes are experiencing similar microenvironment in the corona region of the micelles.

Propylene Oxide, Micelles, Block copolymers, Chemical properties

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Structural characterization of interfacial n-octanol and 3-Octanol using molecular dynamic simulations

Article Abstract:

Structurally isomeric octanol interfacial systems, water/vapor, 3-octanol/vapor, n-octanol/vapor, 3-octanol/water, and n-octanol/water are investigated at 298 K using molecular dynamics simulation techniques. It shows that both 3-octanol and n-octanol roughen the water interface with respect to the water/vapor interface and the wet octanol phases, in the octanol/water systems reach bulk properties in a shorter distance than the dry octanol/vapor interfaces.

Octanol, Molecular dynamics, Mechanical properties, Properties

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