Absorption and emission spectral maxima of 4-methoxyacetophenone (4MAP) in different a-CD and b-CD concentrations with pH~3 and pH~7 solutions were analysed using UV-visible, fluorescence, time resolved fluorescence measurements and molecular modeling methods. The spectral properties of the Cu:4MAP:CD nanomaterial were examined using SEM, DSC, FTIR, XRD and 1H NMR. Single emission maximum noticed in the solvents while dual emission (ICT) observed in the CD solutions. Similar absorption and fluorescence spectral shifts observed establish that 4MAP form identical type of the inclusion complexes with α-CD and β-CD. The life time of the 4MAP increased in the following order: water < α-CD < β-CD indicates that β-CD:4MAP has more stable than α-CD. SEM picture clearly shows the morphological difference between copper nano, 2AS and the Cu nano inclusion complex. SEM pictures, DSC thermogram, FTIR, 1HNMR, XRD results supported that the formation of Cu-4MAP-α-CD and Cu-4MAP-β-CD nanomaterials.
Rajendiran et al. (2026) studied this question.