Theoretical and Condensed Matter Physics

Biography

Biography: Peter P Pershukevich

Abstract

Complex compounds of lanthanides have been extensively studied for many years and interest in them is increasing due to their unique optical properties and a wide range of applications. With the development of nanotechnology, new opportunities appeared in the development of complex compounds of lanthanides with new properties. Particularly important among them are thermal and radiation stability, volatility in vacuum, photostability, durability, homogeneity, etc. Many methods for modifying lanthanide complex compounds, in particular europium (III), have been described in the literature. In the present work, an attempt has been made for the first time to modify coordination compounds by synthesis of nanostructured supramolecular complexes of europium (III), in which nanodiamonds were used as templates. As the initial coordination compounds, two well-tested multiligand complexes of europium were used: the first with tris(tenoyltrifluoroacetonate) and 1,10-phenanthroline (Eu (TTA)3Phen) (also EuT); the second with bathophenanthroline and NO3 groups (Eu (BPhen)2(NO3)3) (also EuB). The totality of the data obtained by us on electron scanning microscopy, spectral-luminescent characteristics, IR and EPR spectra clearly indicates the formation of new complexes with ND as a result of targeted synthesis. Its physicochemical properties differ significantly from those of the initial coordination compounds. It has been revealed that the advantages of complexes with nanodiamonds are: higher photostability (2-3 times), a spectrum with predominant emission in one narrow band 5D0-7F2 (~ 615 nm), a higher luminescence brightness when excited in the far UV region of the spectrum. New luminescent complexes of lanthanides with ND in the composition of polymer matrices can be used: as luminescent substances in OLED; as active materials for detectors and dosimeters of ionizing radiation; as active laser media.