A Top-Down Approach and Thermal Characterization of Luminescent Hybrid BPA.DA-MMA@Ln2L3 Materials Based on Lanthanide(III) 1H-Pyrazole-3,5-Dicarboxylates

Abstract

In this study, novel hybrid materials exhibiting luminescent properties were prepared and characterized. A top-down approach obtained a series of polymeric materials with incorporated different amounts (0.1; 0.2; 0.5; 1, and 2 wt.%) of dopants, i.e., europium(III) and terbium(III) 1H-pyrazole-3,5-dicarboxylates, as luminescent sources. Methyl methacrylate and bisphenol A diacrylate monomers were applied for matrix formation. The resulting materials were characterized using Fourier transform infrared spectroscopy (FTIR) and thermal analysis methods (TG-DTG-DSC, TG-FTIR) in air and nitrogen atmosphere, as well as by luminescence spectroscopy. The homogeneity of the resulting materials was investigated by means of optical microscopy. All obtained materials exhibited good thermal stability in both oxidizing and inert atmospheres. The addition of lanthanide(III) complexes slightly changed the thermal decomposition pathways. The main volatile products of materials pyrolysis are carbon oxides, water, methyl methacrylic acid and its derivatives, bisphenol A, 4-propylphenol, and methane. The luminescence properties of the lanthanide complexes and the prepared hybrid materials were investigated in detail.

TG-DSC and TG-FTIR Studies of Annelated Triazinylacetic Acid Ethyl Esters—Potential Anticancer Agents

“…The evolved carbon dioxide molecules give rise to the characteristic bands at 2358, 2322 and 697 cm −1 from their stretching and deformation vibrations. Simultaneously, the bands in the regions of 4000–3200 cm −1 and 1800–1300 cm −1 were recorded due to the stretching and deformation vibrations of water molecules ( Figure 8 ) [ 25 , 26 ].…”

“…The stretching vibrations of the CH bonds from the methane molecules give rise to the characteristic group of bands in the range of 3200–2900 cm −1 with a maximum of 3017 cm −1 . A very weak double band in the range of 2200–2000 cm −1 confirms the evolution of carbon monoxide [ 26 ]. The FTIR spectra of compound 6 , which contains in its structure two chlorine atoms, show split bands in the range of 3100–2600 cm −1 as a result of the evolution of the HCl molecules [ 31 ] ( Figure 8 b).…”

A Series of Novel 3D Coordination Polymers Based on the Quinoline-2,4-dicarboxylate Building Block and Lanthanide(III) Ions—Temperature Dependence Investigations

“…Further heating caused their decomposition and burning, accompanied by significant mass losses (about 50%) recorded on the TG curves associated with strong exothermic effects. As the solid residues of metal complex heating in air atmosphere, the corresponding metal oxides Nd 2 O 3 , Eu 2 O 3 , Tb 4 O 7 , and Er 2 O 3 were formed above 600 • C [51][52][53].…”

Luminescent Hybrid BPA.DA-NVP@Eu2L3 Materials: In Situ Synthesis, Spectroscopic, Thermal, and Mechanical Characterization

“…We have also focused on the estimation of the mechanical properties of hybrid materials functionalized by the europium(III) complex dopant. To the best of our knowledge, these investigations are rather omitted [46] for such types of hybrid materials while they are routinely conducted for pure polymeric matrices [47][48][49]. Awareness of the mechanical properties of the tested materials will allow for the design of materials with optimal compositions, in which the functional dopant will bring the expected properties (in our case luminescence) [20,42,43,50], without a significant deterioration of the matrix properties or obtaining new features, beneficial in the context of their target application.…”