Phase factors experimental probing

Although the structural differences between the water/CClq and water/DCE interfaces are not so large, the chemical and/or physical nature of the organic phase itself reflects on the photophysical properties of a probe molecule, indicating the novelty of the present experimental approaches. Systematic investigations are important to reveal factors governing structural and physical characteristics of water/oil interfaces. Therefore, we introduced fluorescence dynamic anisotropy and excitation energy transfer measurements to other water/oil interfacial systems the data are summarized in Table 12.3. The results are discussed in terms of the relationship between the interfacial stracture and the polarity at the water/oil interfaces (Section 12.6). 

As comprehensively reviewed by Lipson and Guillet (1), inverse gas chromatography (IGC) has been used as a convenient tool to study the thermodynamic properties of polymeric systems. Despite its wide usage, all experimental and theoretical factors in this technique are not fully understood. Loading determination, usually done by means of extraction or calcination, has been considered to be the most significant source of experimental error (2.). Other factors, such as concentration effects associated with large injection sizes, slow diffusion of solute probe molecules in the stationary phase, and adsorption of probes onto the liquid-support interface, may also af-... 

The technique can be considered as complementary to FMC, although it is constrained by the need to use volatile probes, a number of experimental factors usually result in more accurate thermodynamic data being obtained. The most important difference between IGC and FMC is that in the former technique, the probe is at infinite dilution, therefore, only the most active sites on the filler surfaces are likely to be probed. As adsorption from the gas phase occurs during IGC, only weakly bound molecules of carrier gas need to be displaced during the adsorption process, it is this aspect that may lead to production of more accurate thermodynamic data. 

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