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Ultrasonic measurements of aqueous solutions of ?-cyclodextrin with alkyl pyridinium bromides

Balcerzak A.

Archives of Acoustics

2008

Vol. 33, No. 4

627-641

Ultrasonic measurements of the velocity and absorption coefficient, α/f2, of aqueous solutions of β-cyclodextrin with alkyl pyridinium bromides CnH2n+1C5H4NBr (n = 8, 10, 12), were carried out at the following temperatures: 288.2 K, 298.2 K, 308.2 K and 318.2 K, and frequency range from 1 MHz to 150 MHz. Concentration of the both components equaled 0.01 M. The occurrence of two ultrasonic relaxation processes has been reported. Thermodynamic and kinetic parameters related to these processes have been calculated. The obtained results have been compared with data published previously for α-cyclodextrin systems.

Some Results of Ultrasonic Spectroscopy Invastigations of Aqueous Systems of Cyclodexrtins and Amphiphilic Substances

Balcerzak A.

Molecular and Quantum Acoustics

2003

Vol. 24

9-15

On basis of formerly made and published [1-4] ulrtasonic spectroscopy measurements of aqueous systems of a- or B-cyclodextrin with amphiphilic substances, calculations explain some wxperimental results concerning stability of inclusion coplexes of the cyclodextrin and the amphiphilic substance and a mechanism of these complexes formation. Simple geometric considerations and the three-step kinetic mechanism have been applied.

Investigations of ultrasonic velocity and absorption in aqueous solutions of [alpha]- and ß-cyclodextrin with sodium alkyl sulfates. Part 2. ß-cyclodextrin systems

Balcerzak A., Płowiec R., Juszkiewicz A.

Archives of Acoustics

2001

Vol. 26, no. 1

51-63

In second part of this work, velocity and absorption measurements of ultrasonic waves in aqueous solutions of ß-cyclodextrin containing different sodium alkyl sulfates are reported. One or two relaxation processes for these solutions have been established. Thermodynamic and kinetic parameters related to these processes have been calculated. The results have been compared with those obtained for solutions of ?-cyclodextrin and presented in Part 1 of this paper. Explanation of the origins of these processes has been proposed.

Investigations of ultrasonic velocity and absorption in aqueous solutions of [alpha]- and ß-cyclodextrin with sodium alkyl sulfates. Part 1. [alpha]-cyclodextrin systems

Balcerzak A., Płowiec R., Juszkiewicz A.

Archives of Acoustics

2001

Vol. 26, no. 1

37-52

In this part, the velocity and absorption measurements of ultrasonic waves in aqueous solutions of [alpha]-cyclodextrin containing different sodium alkyl sulfates are reported. One or two relaxation processes for these solutions have been established. Thermodynamic and kinetic parameters related to these processes have been calculated. In the second part, experimental results for ß-cyclodextrin will be reported and compared with those presented here.