Association of 1:1 Inclusion Complexes of Cyclodextrins into Homo- and Heterodimers: A Spectroscopic Study Using a TICT-Forming Fluorescent Probe as a Guest Compound

Detection of Paramagnetic pH‐Dependent Inclusion Complexes between β‐Cyclodextrin Dimers and Nitroxide Radicals

“…The molar ratio [ 1 c ]/[ 1 b ] of the two complexes, obtained from the EPR spectra, increased linearly with increasing concentration of the dissolved β‐CD. When recording the EPR spectra in strongly basic solutions (pH>12.5) the signals of the 1:2 complex 1 c disappeared while those of the 1:1 complex remained (see Supporting Information), similar to what had been found previously with a pyrene‐modified γ‐CD8a and with the 1:2 complex between 4‐(dimethylamino) benzonitrile and β‐CD 8b. The lability of the 1:2 complex at high pH values is attributed to the fact that in basic media dissociation of the secondary CD hydroxy group (p K a =12.5) takes place to form an anionic species.…”

Theoretical and Experimental Investigations on Inclusion Complex β-Cyclodextrin and Sulcatone: A Cardiovascular Activity Evaluation

“…The upward displacements of H-3 and H-5 of β-CD indicated that these protons are located near an electron cloud that induced anisotropic magnetic shielding. 43 Similar results have been described in the literature 44 as evidence of complexation.…”

Fluorescence enhancement of the aflatoxin B1 by forming inclusion complexes with some cyclodextrins and molecular modeling study

“…8). According to the enthalpy-entropy compensation theory [31][32][33], the gain of enthalpy on the formation of inclusion compounds is achieved with the loss of entropy [34], DS1 is negative primarily due to the restricted rotation of the host and the guest in the formed complex [35]. The negative enthalpy change in these complexes reveals the presence of hydrophobic interaction [36,37] in the AFB 1 -CD systems.…”

“…Complexation of the cyclodextrin and either wholly or partially included guest molecules results in a number of interesting spectroscopic effects [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. We have studied the solvent and complex formation effects on the fluorescence spectrum and enhancement factor of the molecule, AFB 1 in different temperatures.…”