A study on the inclusion complexation of 3,4,5-trihydroxybenzoic acid with β-cyclodextrin at different pH

Encapsulation of 4-hydroxy-3-methoxy benzoic acid and 4-hydroxy-3,5-dimethoxy benzoic acid with native and modified cyclodextrins

“…A clear isosbestic point was observed in the absorption spectra and the changes were observed in the absorbance are very small. Further, no changes were observed in the absorbance of these solutions when recorded after 12 h. In general, the existence of an isosbestic point in the absorption spectra is indicative of the formation of well defined 1:1 complex [13][14][15][16][17][18][19][20][21][22][23][24][25]. With the addition of all the four CDs, the increase in absorbance along with a spectral shift indicates the formation of 1:1 HMBA/CD inclusion complexes.…”

“…In addition, CDs can mediate many organic reactions in which CDs represent a good model of mimicking enzymes [6,7] and have molecular recognition property to identify the small differences between compounds [8,9]. Due to the limitations of the experimental methods, in recent times molecular modeling has become very popular in CD chemistry [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

“…In the last few years, we have been examining amino, hydroxyl, aldehyde and COOH group substituted benzenes in various environments [13][14][15][16][17][18][19][20]. It has been observed that the photophysical characteristics of these molecules are largely influenced by the nature of substituents in the para position of the phenyl rings.…”

Guest-Host Inclusion Complex Formation of 2-, 3-, and 4-Aminobenzoic Acids with Native and Modified Cyclodextrins

“…However, with α-CD/HP-α-CD solutions, the emission intensities of all the ABAs increased. Further, the absorbance and fluorescence intensity changes were different in α-CDs and β-CDs, which indicate all the CDs form different types of inclusion complexes [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Evaluation of antibacterial activity of caffeic acid encapsulated byβ-cyclodextrins

“…All these factors contribute to a favourable thermodynamic system that can be characterised by the enthalpy (DH), entropy (DS) and Gibbs free energy (DG) (Hirose, 2001). Moreover, the pH and the solvents are, also, crucial for the efficiency of the complexation process between organic compounds and CDs (Stalin and Rajendiran, 2006;Sankaranarayanan et al, 2010;Pinho et al, 2014). In nature, it is possible to find three native CDs (a, b and g), but a wide range of modifications have been carried out on native CDs to improve their properties.…”