Spectrophotometric study on the thermodynamics of binding of alpha- and beta-cyclodextrin towards some p-nitrobenzene derivatives.
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.
Lo Meo
Paolo
P
Università degli Studi di Palermo, Dipartimento di Chimica Organica E. Paternò, Viale delle Scienze-Parco d'Orleans II (pad. 17), 90128 Palermo, Italy.
D'Anna
Francesca
F
Riela
Serena
S
Gruttadauria
Michelangelo
M
Noto
Renato
R
D003505:Cyclodextrins / Q000737:chemistry* / Q000378:metabolism; D007700:Kinetics; D009578:Nitrobenzenes / Q000737:chemistry* / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics; D047391:alpha-Cyclodextrins; D047392:beta-Cyclodextrins
D003505:Cyclodextrins; D009578:Nitrobenzenes; D047391:alpha-Cyclodextrins; D047392:beta-Cyclodextrins; C031215:betadex; C032613:alpha-cyclodextrin