Registration Number
0225U004984,
(0125U002923)
, R & D reports
Title
Design and Characterization of Lanthanoid(III)-Embedded Polyoxotungstates with Mixed Heteroions: Synthesis, Structural Insights, and Properties
popup.stage_title
ПОМ-сендвічі структурного типу Пікока–Уіклі, які містять різні лантаноїди в позиції гетероіона Ln(III)
Head
Radio Serhii V., Кандидат хімічних наук
Registration Date
23-12-2025
Organization
Vasyl' Stus Donetsk National University
popup.description1
Develop and characterize new crystalline salts/solid solutions based on Na9[(X1–xYx)(W5O18)2]·nH2O with lanthanide ions in the heteroatom position, determine their structural and spectral properties, and investigate the effect of these properties in composite materials "polymer–polyoxometalate with a mixed heteroanion" for the development of effective antibacterial coatings.
popup.description2
Within the first stage of the research project, comprehensive studies were conducted aimed at designing and investigating new lanthanide(III)-containing polyoxotungstates with a Peacock–Weakley–type structure. Particular attention was focused on compounds in which two different lanthanide ions simultaneously occupy the heteroatom position in controlled ratios.
For the first time, a series of crystalline mixed-heteroion salts with Ho/Eu and Yb/Nd combinations of the composition Na9[LnxLn1–x(W5O18)2]·nH2O were obtained. It was demonstrated that these compounds are single-phase, structurally stable, and retain the characteristic Peacock–Weakley polyoxotungstate framework. This was confirmed by IR, UV-Vis, and mass spectrometry, as well as by electron microscopy.
New experimental data were obtained on the influence of the heteroion composition on the spectral and luminescent properties of the polyoxotungstates. The possibility of controlling the optical characteristics of the materials by varying the lanthanide ratio was established.
The results are of fundamental importance for the development of polyoxometalate chemistry and, at the same time, provide a scientific basis for designing luminescent, sensing, and potentially biocidal materials relevant to science, education, and applied fields in Ukraine and worldwide.
Product Description
popup.authors
Oleksandra Y. Mariichak
Alina V. Popova
Anna O. Zakharchuk
popup.nrat_date
2025-12-23
