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... parameter used in calculating of the ratio of guest and host molecule in cyclodextrin chemistry. Based on the theory of cyclodextrin, one host molecule generally able to include one guest molecule. In view of the molecule size of ozone, the most possible form of ozone/CD inclusion complex is one ozone molecule accommodated in one cyclodextrin. In fig. 4 the relationship between transferred ozone dose and CD dose a generally give a CSR number of 1:1 of ozone and CD ...
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... Just a few authors have proposed different concepts and protocols with CDs, the aim being to try and stabilize the ozone molecule due to its very short half-lifein the CD cavity. Wang et al. (2016) studied the complexation of HPbCD with O 3 in solution and observed its oxidative properties on potassium indigotrisulfonate (indigo) and 2.2 ′azino-bis (3-ethylbenzothiazoline-6-sulfonate) (ABTS). They showed that only the solution containing HPbCD/O 3 decreased the indigo absorbance after 72 h. at 600 nm, and that the decomposition of ABTS increased by increasing the doses of ozone/CD solution. ...
Ozonized (2-Hydroxypropyl)-β-cyclodextrins (Oz-HPbCDs) were produced by direct gas/solid reaction between gaseous ozone (O3) and solid HPbCD. The solid materials obtained were first characterized using physical and chemical methods and compared to the initial HPbCD. The main process parameters of the synthesis were studied independently to assess their effect on the oxidizing power of Oz-HPbCDs. The ability of the Oz-HPbCDs to retain their oxidative properties over time was evaluated, at different storage temperatures, for a period of at least two months. Lastly, aqueous solutions of HPbCD and Oz-HPbCD at different concentrations were contacted with bacterial strains of Escherichia coli and Streptococcus uberis to see whether these materials might have bactericidal properties. Since normal bacterial growth was noted with HPbCD, the antimicrobial efficiency of Oz-HPbCDs was clearly demonstrated on these two types of bacteria.
