Functional group

Wavenumber (cm−1)

Ho(NO3)3∙5H2O

Ho-β-CD inclusion complex

Changes Δδ

˅[OH],

3398.37

3393.69

−4.68

δ[OH of HOH]

1633.04

1638.92

5.68

δ[NO3]

1482, 1384.65, 1041.58, 819.61, 747.87