Features of the Preparation and Luminescence of Langmuir-Blodgett Films Based on the Tb(III) Complex with 3-Methyl-1-phenyl-4-stearoylpyrazol-5-one and 2,2′-Bipyridine

In this study, we investigated the effect of terbium ions (Tb(3+)) on the subphases of the limiting area of the molecule for the complex compound (CC) TbL(3)∙bipy (where HL is 3-methyl-1-phenyl-4-stearoylpyrazol-5-one and bipy is 2,2′-bipyridine). We examined the Langmuir monolayer and the change in the luminescence properties of TbL(3)∙bipy-based Langmuir-Blodgett films (LBFs). The analysis of the compression isotherms, infrared, and luminescence spectra of TbL(3)∙bipy LBFs was performed by varying the concentration of Tb(3+) in the subphases. Our results demonstrate the partial dissociation of the CC at concentrations of C(Tb(3+)) < 5 × 10(−4) M.