Synthesis and photoluminescence properties of Eu(pzc)3(phen) and Eu(mpzc)3(phen)

Europium Complex Covalently Grafted on Si(100) Surfaces, Engineered with Covalent Polystyrene Nanostructures

“…The SA_PSS_Eu exhibits PL with a strong, sharp, and well-resolved emission at 616 nm (Figure a) that can be ascribed to the electric-dipole 5 D 0 → 7 F 2 transition of the Eu 3+ ions located at the sites without inversion symmetry. ,,,− A less intense emission peak for the 5 D 0 → 7 F 1 is also evident at 593 nm. ,,,− Other very weak PL signals are present at higher wavelength, out of the range of Figure a. ,,,− Therefore, even though they have different intensities, both electric- and magnetic-dipole transitions are evident in the present Eu(III)-monolayer . In fact, 4f levels in lanthanide compounds have been generally considered essentially atomic in nature and simple spectators with respect to the chemical bond because filled 5s 2 and 5p 6 levels shield 4f orbitals from ligand field effects.…”

Spectroscopy of Eu3+ and Tb3+ pyridine- and pyrazine-2-carboxylates

“…The signs of the 4f-5d electronic transitions in the excitation spectra of terbium tetrakis-pyrazine-2-carboxylates are masked by the ILCT band, that can be assigned to the n-* transition of the nonbonding electrons of the heterocyclic nitrogens. This band at 300-350 nm is seen clearly in the absorption spectrum of pyrazine-2-carboxylic acid [6]. The appearance of the ILCT band with the longwave edge at 352-357 nm in the excitation spectra of NaEu(pyr) 4 ·H 2 O and NaTb(pyr) 4 ·H 2 O (Figs.…”

“…[4,5], complexes of tris-europium pyrazine-2-carboxylates with phenanthroline were presented in Ref. [6]. Judging from the X-ray data, the ammonium-and sodium-lanthanide tetrakis-picolinates have a chain-like structure [3], and tetrabutylammonium-erbium tetrakis-picolinate has mononuclear molecular structure [7].…”

Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

“…GPC analysis was performed to determine the molecular weights and molecular weight distributions of the polymeric metal complex, the data indicate that the complex has formed the polymer; the degrees of polymerization (n) are about 9. According to previous literature [13,14], the coordination number of Eu is 8, so the complex is a dendrimer. The results of measurement and calculation suggest that the formulas of complexes are [(C 32 H 18 N 8 ) 3 Eu] 9 .…”