Polarographic Determination of Guest-Molecules in the Presence of β-Cyclodextrin

Daruházi, L.; Barcza, Lajos; Szejtli, J.

doi:10.1007/978-94-009-7855-3_31

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“…[38] reported tensammetric ac curves for P-cyclodextrin in Britton-Robinson buffer (pH 6.8) and 0.1 M formic acid in acidic supporting electrolyte. A well-defined capacitive peak at about -0.15 V (vs. SCE) was found.…”

Section: Electrochemistry Of Cyclodextmns and Cyclodexthn Ilvclusion mentioning

confidence: 99%

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Electrochemistry of cyclodextrins and cyclodextrin inclusion complexes

Bersier

Klingert

1991

Electroanalysis

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The state of the art of the electrochemistry of a-, p-, and y-cyclodextrins (CDs) and cyclodextrin inclusion complexes and their polarographic and voltammetric assay are reviewed. The polarographic and voltammetric determination of physicochemical parameters of CD inclusion complexes are discussed.Practical applications of adsorption and inclusion effects for electroanalytical purposes are presented; future prospects are discussed, and 95 references are given.Cyclodextrins (CDs) are cyclic oligomers of six (a-CD), seven (8-DC), or eight (y-DC)( 1 + 4)-linked a-D-glycopyranose units [l-101. The structure and the approximative geometrical dimensions of cyclodextrins are shown in Figure 1A. As a result of the torus shape, with the primary and secondary hydroxyl groups forming the narrower and wider rim of the molecule, respectively (Fig. lB), the cavity is hydrophobic and the outer surface is hydrophilic. Physical properties of cyclodextrins are summarized in Table 1 [ 3, 9, 101. Because of their unique structure and physicochemical properties, the cyclodextrins are able to form inclusion complexes with a wide variety of hydrophobic molecules having a diameter of 5-8 A [ 1,2,. In these adducts, 6 1991 VCH Publishers, Inc.1040-0397/91/$3.50 + .25 Publications concerning electrochemical work on CDs can be divided into those concerned with:

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Section: Electrochemistry Of Cyclodextmns and Cyclodexthn Ilvclusion mentioning

confidence: 99%

“…The adsorption of CD follows the Langmuir isotherm [9, 10, 32,35,37,38]. The equilibrium constant for the adsorption of p-CD, for instance, is about 8 times larger than that of the a-CD, which follows the solubility of the two compounds in aqueous solution…”

Section: Electrochemistry Of Cyclodextmns and Cyclodexthn Ilvclusion mentioning

confidence: 99%

Electrochemistry of cyclodextrins and cyclodextrin inclusion complexes

Bersier

Klingert

1991

Electroanalysis

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Polarographic Determination of Guest-Molecules in the Presence of β-Cyclodextrin

Cited by 1 publication

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Electrochemistry of cyclodextrins and cyclodextrin inclusion complexes

Electrochemistry of cyclodextrins and cyclodextrin inclusion complexes

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