Excess thermodynamic functions of mixtures of fluorocarbons with fluorocarbon-hydrocarbon compounds

Chemistry, Physical Chemistry, and Uses of Molecular Fluorocarbon−Hydrocarbon Diblocks, Triblocks, and Related Compounds—Unique “Apolar” Components for Self-Assembled Colloid and Interface Engineering

“…Partition coefficient studies of a series of FnCHdCHHm diblocks (n ) 6 or 8; m ) 6, 8, or 10) between F-decalin, F-octyl bromide, or E-bis-1,2-(Fbutyl)ethene and hexadecane showed that the diblocks distributed themselves without marked preference (or phobicity) for either phase. 204 The relative solubility in the HC increased, as expected, with increasing m/n ratio. Partition of the diblock was generally slightly in favor of the linear and slightly lipophilic F-octyl bromide, followed by the linear triblock F4CHdCHF4, as compared to the more compact bicyclic F-decalin.…”

“…196 The excess thermodynamic functions of mixtures of F6H12 or FnCHdCHHm (n ) 6, m ) 10; n ) 8, m ) 6, 10) diblocks with C 8 F 17 Br or with triblock F4CHdCHF4 have been measured. 197 Complex, component, and molar ratio-dependent deviations from ideality, different from those found for typical FC/FC, HC/HC, and FC/HC mixtures, were seen. Thermodynamic stabilization (negative excess Gibbs energy) was, for example, observed when small amounts of F8CHdCHH6 were added to C 8 F 17 Br.…”

“…Deviation from Raoult's law of diblock/FC mixtures could further reduce the solubility of the fluorous phase in water. 197 Excess thermodynamic stabilization with respect to ideality increased with diblocks having a high Fn/Hm ratio and for lipophilic FCs, such as F-octyl bromide.…”

Structural stability of perfluorocarbon and phospholipid emulsions on storage

“…According to the laws of colloidal chemistry, the strength of the surface-active adsorption layer (adlayer) is provided by good adhesion of emulsifier molecules to the fluorocarbon phase. PFCs used for the creation of medico-biological emulsions are virtually insoluble in water [1,2] and poorly dissolve other compounds [3]. For this reason, the particles in PFC emulsions possess a double-layer spherical structure [4].…”

Gels from a semifluorinated n-alkane in fluorinated solvents as a probe for intermolecular interactions

“…4), and ranges between 1 and 1.5 kJ/mol, as expected [30]. This reflects the strong deviation from ideality in these systems, and the significant antipathy between fluorinated and hydrogenated chains.…”