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Uranyl complex dissolved in room-temperature ionic liquids has diagnostic absorption and emission spectra that has allowed the identification of the symmetry and geometry of the complex. The uranyl complexes are examined in imidazolium and pyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquids.

The authors review the publications on liquid crystals and surfactants. The topics of interest include calamitic liquid crystals, layered compounds and magnetic anisotropy and magnetic alignment of liquid crystals.

Mathematics, a mathematical program capable of supporting advanced numerical and symbolic computing and 2D-3D graphics, was used to compute exact and efficient chemical solubilities. Solubilities could be determined through a fast interactive program erasable after work sessions or a short package available for multiple use. Among the advantages provided by Mathematica were user friendliness, fast and exact calculation, efficiency and enhancement of students' computer literacy.

The complex formation of the uranyl ion with chloride ions in acetonitrile is examined by factor analysis of ultraviolet-visible absorption and U [L.sub.3] edge EXAFS (extended X-ray absorption fine structure) spectra. The U(VI) coordination of the solution species [U[O.sub.2][Cl.sub.2]([H.sub.2]O)[(MeCN).sub.2]] has changed during the crystallization of replacing one MeCN molecule with a bridging [[mu].sub.3].O atom in the tetramer.

The ferrocene-derivatives bis(ferrocenyl-ethynyl)-1,10-phenanthroline ([Fc.sub.2]phen) and ferrocenoyltrifluoroacetone (Hilta) is used to synthesize ferrocene-containing rate earth beta-diketonate complexes. It is found that the presence of the ferrocene groups makes the rare-earth complexes hydrophobic and well-soluble in apolar organic solvents.