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Preparations are reported for an extensive series of phosphate salts of polyammonium species from the corresponding halide salts. The phosphate salts, as anhydrous materials, are liquid at or near room temperature. Three approaches for the preparation of these materials are noted, including treatment with aqueous hexafluorophosphoric acid, classical ion exchange methods, and treatment with 85% phosphoric acid. The last of these provides the most desirable results. Several monocationic phosphate salts have also been prepared for comparison with other types of ionic liquids.

A series of polycationic derivatives of α- and β-cyclodextrin have been synthesized. Their interactions for inclusive binding of series of organic phosphorus oxyanions and anions of biological α-amino acids have been investigated using NMR techniques. Determinations of association constants and orientation of guest anion binding to the host polycationic cyclodextrin derivatives have been performed. © 2000 John Wiley & Sons, Inc. Heteroatom Chem 11:546–555, 2000

Herein is reported the preparation of several series of polyammonium salts that serve as cationic lipids or precursors thereof, and are structurally based on the parent diamine 1,4-diazabicyclo[2.2.2]octane (dabco). Through selective alkylation of dabco a variety of di- and tetracationic lipid species and precursors thereof have been prepared. The resultant materials are of significant interest for a variety of purposes, including serving as antimicrobial agents and antihydrophobic species, the details of which are provided in separate reports.

A series of polyammonium halide salts have been converted to the phosphate ion form. The resultant salts constitute a new category of non-aqueous ionic liquid (NAIL); these new ionic liquids (Liquid Ionic Phosphates) have been characterized by standard methods and have been investigated for their electrical conducting characteristics.