Spectrophotometric study on the thermodynamics of binding of alpha- and beta-cyclodextrin towards some p-nitrobenzene derivatives |
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Authors: | Lo Meo Paolo D'Anna Francesca Riela Serena Gruttadauria Michelangelo Noto Renato |
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Affiliation: | Università degli Studi di Palermo, Dipartimento di Chimica Organica E. Paternò, Viale delle Scienze-Parco d'Orleans II (pad. 17), 90128 Palermo, Italy. |
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Abstract: | Binding properties of native alpha- and beta-cyclodextrin towards some nitrobenzene derivatives have been studied by means of UV-vis spectrophotometry. The former host is able to form complexes having 1:1 and 1:2 stoichiometric ratios with these guests, while only 1:1 complexes are detected with the latter host. A careful analysis of the thermodynamic parameters for complexation equilibria, under the perspective of the enthalpy-entropy compensation effect, reveals that binding abilities of the two different hosts are subject to different features. |
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