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• W5198191 endingPage "221" @default.
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• W5198191 abstract "Formation constants of ternary complexes of copper(II), 6-deoxy-6-(N-histamino)-β-cyclodextrin (CDhm) and in turn, L/D-alanine or L/D-tryptophan have been determined potentiometrically at 25°C and I = 0.1 mol dm-3(KN03). In the case of the amino acid tryptophan the ternary complex containing the D-enantiomer is more stable than that having the L-isomer.Calorimetric measurements have been carried out to obtain the enthalpy and entropy values associated with complex formation. Comparison of thermodynamic parameters pertinent to formation of the simple CDhm copper(II) complex with those of the ternary complexes allows one to ascertain the number of donor atoms involved in the coordination to copper(II) in mixed complexes. The determination of ΔH° and ΔS° values renders easier the understanding of the factors determining stereoselectivity in mixed tryptophanate complex. The stereoselectivity may be explained in terms of solvophobic interaction between the indole residue and the cyclodextrin cavity. Fluorescence spectra reinforce the enantiomeric recognition role of the CDhm, assisted by the cis coordination of amino acid to copper(II) ion." @default.
• W5198191 created "2016-06-24" @default.
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• W5198191 date "1991-01-01" @default.
• W5198191 modified "2023-09-30" @default.
• W5198191 title "Thermodynamics of Chiral Recognition of Aromatic Amino Acids by Histamine Functionalized-β-Cyclodextrin Copper(II) Complex in Aqueous Solution" @default.
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• W5198191 doi "https://doi.org/10.1007/978-94-011-3620-4_17" @default.
• W5198191 hasPublicationYear "1991" @default.
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