Supercritical Fluid Technology in Materials Science and by Marian Iordache, Panos J. Antsaklis

Supercritical Fluid Technology in Materials Science and by Marian Iordache, Panos J. Antsaklis

By Marian Iordache, Panos J. Antsaklis

Analyzes the chemical reactions, constructions, and basic homes of supercritical fluid platforms for the creation of latest compounds, nanomaterials, fibers, and flicks.

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13. MJ Kamlet, J-LM Abbound, RW Taft. Solvatochromic comparison method. 6. Pi-Star scale of solvent polarities. J Am Chem Soc 98:6027, 1977. 14. MJ Kamlet, TN Hall, J Boykin, RW Taft. Linear solvation energy relationships. 6. Additions to and correlations with the Pi-Star scale of solvent polarities. J Org Chem 44:2599, 1979. 15. DC Dong, MA Winnik. The Py scale of solvent polarities—solvent effects on the vibronic fine-structure of pyrene fluorescence and empirical correlations with ET-value and Y-value.

Electron transfer reactions have also been used in the probing of solute– solute interactions in supercritical fluid solutions. For example, Takahashi and Jonah examined the electron transfer between biphenyl anion and pyrene in supercritical ethane (192). Worrall and Wilkinson studied triplet-triplet energy transfer reactions for a series of donor–acceptor pairs, including anthraceneazulene in supercritical CO2 -acetonitrile and supercritical CO2 -hexane and benzophenone-naphthalene in supercritical CO2 -acetonitrile (193).

Bimolecular Reactions Studies of the entrainer effect discussed above demonstrate that the solute in supercritical fluid–cosolvent mixtures is, in many cases, surrounded preferentially by the cosolvent molecules. Since the cosolvent may be regarded as a second solute, the solute–cosolvent clustering may be considered as a special case of solute-solute clustering. An important consequence of the entrainer effect is enhancement in solute–cosolvent interactions or reactions. Similarly, solute-solute clustering in supercritical fluid solutions may enhance bimolecular reactions between the solute molecules.

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