Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Martin Tsvetkov"'
Autor:
Maria Ivanova, Joana Zaharieva, Martin Tsvetkov, Vesela Lozanova, Bernd Morgenstern, Rumen Lyapchev
Publikováno v:
Molbank, Vol 2024, Iss 3, p M1874 (2024)
For very first time, we report the synthesis of 8-(2-methoxyphenyl)-6-methyl-2-(1-methyl-1H-benzo[d]imidazol-2-yl)quinoline 1. This was achieved in several steps, including usage of the Suzuki reaction for functionalization of 2-(1H-benzo[d]imidazol-
Externí odkaz:
https://doaj.org/article/b2f600d4d5a746bc8d7e6673130c89f1
Autor:
Denitsa Elenkova, Yana Dimitrova, Martin Tsvetkov, Bernd Morgenstern, Maria Milanova, Dimitar Todorovsky, Joana Zaharieva
Publikováno v:
Molecules, Vol 29, Iss 15, p 3713 (2024)
The solvothermal synthesis of LnCl3.nH2O with terephthalic acid (benzene-1,4-dicarboxylic acid, H2BDC) produced metal–organic frameworks (LnBDC), [Ln2(BDC)3(H2O)4]∞, where Ln = Sm, Eu, Tb, and Dy. The materials obtained were characterized by a nu
Externí odkaz:
https://doaj.org/article/9898ba760e96472bb4113b456698d9f4
Autor:
Julia Romanova, Rumen Lyapchev, Mihail Kolarski, Martin Tsvetkov, Denitsa Elenkova, Bernd Morgenstern, Joana Zaharieva
Publikováno v:
Molecules, Vol 28, Iss 10, p 4113 (2023)
The luminescent metal-organic complexes of rare earth metals are advanced materials with wide application potential in chemistry, biology, and medicine. The luminescence of these materials is due to a rare photophysical phenomenon called antenna effe
Externí odkaz:
https://doaj.org/article/1d0866788bbf4ba5ad50e3b98500f065
Publikováno v:
Crystals, Vol 13, Iss 5, p 769 (2023)
The synthesis of orthoferrites of the type La1−xCexFeO3+x/2, x = 0.00, 0.01, 0.03, 0.05, and 0.07, by applying a simple and effective mechanochemical transformation from the constituent oxides is presented. Physicochemical methods such as powder X-
Externí odkaz:
https://doaj.org/article/a3151965487b47a7bacc74aadf46737f
Publikováno v:
Acta Chimica Slovenica, Vol 67, Iss 4, Pp 1082-1091 (2020)
ZnFe2O4/rGO/g-C3N4 ternary nanocomposite photocatalysts with different ZnFe2O4/g-C3N4 weight ratio (0.5, 0.75, 1) were prepared by a stepwise solvothermal method using ethylene glycol as the solvent. Physicochemical methods such as X-ray diffraction,
Externí odkaz:
https://doaj.org/article/c0d60bba6f974854913814d2103b6a7c
Publikováno v:
Crystals, Vol 12, Iss 3, p 327 (2022)
Pure HfW2O8- and Ln3+-containing solid solutions, Hf1−xLnxW2O8−x/2 (Ln = Eu, Tm, Lu), were synthesized using the hydrothermal method. The lanthanide ions were selected based on the differences between their ionic radii. A content of the Ln3+ ions
Externí odkaz:
https://doaj.org/article/a4c3d3ffda4248a2b7374e596b0943c9
Publikováno v:
Crystals, Vol 12, Iss 1, p 120 (2022)
Light-emitting phosphors, doped with lanthanide ions of Tb(III) and Sm(III) of the type Gd1.97−y SmyTb0.03(MoO4)3 (y = 0.01–0.11, step 0.02) and Gd1.95−xSm0.05Tbx(MoO4)3 (x = 0.01–0.09, step 0.02), were synthesized and characterized by X-ray
Externí odkaz:
https://doaj.org/article/34660b1f073448e4a963c3f429516249
Autor:
Denitsa Elenkova, Rumen Lyapchev, Julia Romanova, Bernd Morgenstern, Yana Dimitrova, Deyan Dimov, Martin Tsvetkov, Joana Zaharieva
Publikováno v:
Molecules, Vol 26, Iss 23, p 7272 (2021)
New antenna ligand, 2-(phenylethynyl)-1,10-phenanthroline (PEP), and its luminescent Eu (III) complexes, Eu(PEP)2Cl3 and Eu(PEP)2(NO3)3, are synthesized and characterized. The synthetic procedure applied is based on reacting of europium salts with li
Externí odkaz:
https://doaj.org/article/8feec1a6f8cd45429d7ac875797f5938
Autor:
Maria Milanova, Martin Tsvetkov
Publikováno v:
Crystals, Vol 11, Iss 3, p 231 (2021)
Тhe properties of the Rare Earth Elements allow a wide range of applications in optoelectronics, fiber amplifiers, solid-state lasers, telecommunications, biosensing, and photocatalysis, just to mention a few [...]
Externí odkaz:
https://doaj.org/article/841bb20ae9804a0ab3b0c8dc05db2da9
Publikováno v:
Catalysis Today. 357:453-459
Ferrites of the type MFe2O4, where M = Zn, Co, and Mg, were prepared via a sol-gel procedure using propylene oxide as a gelating agent. Silver nanoparticles with an average size of 6 nm were prepared in the presence of the ferrite powders in suspensi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::578089bef4a3abe63f884103c932a6b0
https://doi.org/10.1016/j.cattod.2019.07.052
https://doi.org/10.1016/j.cattod.2019.07.052