Published: Journal of Chromatographic Science, Volume 36, Number 5, May 1998, pp. 269–273.
Effect of
Octakis(diethoxyphosphoryloxy)-tert-butyl-calix[8]arene
in Mobile Phase on the Reversed-Phase Retention Behavior of
Aromatic Compounds: Host–Guest Complex Formation and
Stability Constants Determination
O.I. Kalchenko, J. Lipkowski,
V.I. Kalchenko, M.A. Vysotsky, and L.N. Markovsky
Under reversed-phase high-performance liquid chromatographic conditions (Separon SGX C18 stationary phase, ultraviolet detection at 254 nm, and acetonitrile–water [86:14, v/v] as the mobile phase), addition of octakis(diethoxyphosphoryloxy)-tert-butyl-calix[8]arene in concentrations of 1 x 10–4 to 4 x 104M to the mobile phase leads to decreasing sorption of aromatic solutes on the sorbent’s surface due to the formation of host–guest inclusion complexes between the calixarenes and the aromatic molecules. Stability constants of the complexes (608–2795M–1) are determined from the relationship between the solute capacity factors and the calixarene concentration in the mobile phase.
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