Thermodynamics op the Binding of Guest Molecules to α -Cyclodextrin: an Isoequilibrium Relationship

Liang Feng Han1* and Wolfgang Linert²

¹Peking Institute of Technology , Department of Chemical Engineering, Peking China. ²Institute of Inorganic Chemistry, Technical University Vienna, Getreidemarkt 9, A-1060 Vienna (Austria)

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ABSTRACT:

It is shown that acetonitrile, n-butanol, 2-butanone, i-propanol, n-propanol and methylorange form defined 1:1 inclusion complexes with a-cyclodextrin in aqueous acidic medium. The dissociation constants of these complexes have been determined for various temperatures by spectroscopic means analyzed with a Marquardt non-liner regression method, Isoequilibrium relationships are found and discussed on the basis of recent theoritical descriptions.

KEYWORDS:

Binding; Isoequilibrium; Relationship