β-cyclodextrin inclusion complexes containing Citrus sinensis (L.) Osbeck essential oil: An alternative to control Aedes aegypti larvae

Formation of inclusion compounds of (+)catechin with β-cyclodextrin in different complexation media: Spectral, thermal and antioxidant properties

“…Such a kind of XRD spectrum, many times observed in the literature for pure -CD, is a typical evidence of a well-defined structural order in the examined material [8,14,18,32].…”

“…In none of the current cases, the disagreements were so explicit as those typically necessary to confirm undoubtedly complexation [8,14,18]. The profiles of diffraction in Figure 3c-3e more visibly differed from that in peaks, that together with the absence of old peaks is a strong evidence of complexation [8,18], was only detected at 35.7 o in Figures 3d and 3e. Anyway, as in the case of HNMR results whose differences among Δδi in Table 1 were negligible for M1, M2 and M3, the XRD spectra do not allow to observe an important influence of the method of complexation on the fraction of +CAT really included in -CD.…”

“…As properly occurs in the literature [8], the formation of inclusion compounds was also discussed on the basis of differences between XRD patterns for the free -CD and +CAT/-CD complexes. In none of the current cases, the disagreements were so explicit as those typically necessary to confirm undoubtedly complexation [8,14,18].…”

“…; as phenols in general, drugs, essential oil) may have its solubility increased when included in CDs [6][7][8], but without some undesirable intrinsic characteristics of the guest, such as the low oxidative stability in the case of phenols [5,6,[9][10][11]. It is in general well-accepted that after inclusion the physicochemical properties of the free guest are dominated by those of the host molecule [2].…”

Polymeric Encapsulates of Essential Oils and Their Constituents: A Review of Preparation Techniques, Characterization, and Sustainable Release Mechanisms

“…Although EOs have many useful properties, yet their use is limited due to their water insolubility, high volatility, rapid oxidation, and degradation on exposure to air. 23,24 Further due to these factors, the chances of success and scale up of the EO products at industrial level becomes difficult. In order to overcome these problems, research in the past two decades was oriented towards the exploration of techniques that can provide physical stability and water solubility to EOs without masking their valuable properties.…”