Synthesis and Characterization of Host Guest Inclusion Complexation of Cyclic Oligosaccharide with Industrially Potent Dye in Different Phases by Physicochemical Contrivance

Abstract

The inclusion phenomena of β-Cyclodextrin and Alizarin complexone was investigated by 1H NMR, 2D ROESY, UV-Visible Spectroscopy, Fluorescence Spectroscopy, HRMS and SEM study. The change in chemical shift values in 1H NMR study established the possibility of interactions between the corresponding protons of β-Cyclodextrin and AC molecule, which was further confirmed by the appearance of cross peaks in 2D ROESY spectrum. The Job plot method gave the host-guest stoitiometric ratio to be 1 : 1. The association constant and thermodynamic parameters like ΔH 0 , ΔS 0 and ΔG 0 were calculated from UV-Visible spectroscopy. The experimental results showed, the fluorescence intensity of AC enhanced with increasing concentration of β-Cyclodextrin. The plot of 1/(F-F 0 ) against 1/[β-Cyclodextrin] gave a straight line indicating 1 : 1 stoichiometric ratio of the inclusion complex formed. In this inclusion process, the ΔG < 0 value describes the process to be a spontaneous one.

Chiral induction in a novel self-assembled supramolecular system composed of α-cyclodextrin porous liquids, chiral silver nanoparticles and planar conjugated molecules

“…54 It can be seen that the H-3 and H-5 protons in the inclusion complex of a-CDPL with 4aminoazobenzene have been shifted from 3.89 ppm and 3.73 ppm to 3.90 ppm and 3.74 ppm, respectively, which indicates the entrance of the 4-aminoazobenzene. 55 What is more, the chemical shifts of 4-aminoazobenzene in DMSO-d 6 was compared with that of the inclusion complex of a-CDPL with 4-aminoazobenzene. 56 It was found that the chemical shifts of 3, 5, 10-H in 4-aminoazobenzene have been changed, which suggested that the phenyl part of 4-aminoazobenzene was included in the cavity of a-CDPL.…”