Luminescence and crystal-field parameters of Eu(III) and Tb(III) complexes with nitrilotriacetate

Molecular sensing with lanthanide luminescence in a 3D porous metal-organic framework

“…Meanwhile porous metal-organic frameworks (MOFs), as for a new exciting research area, have been of significant interesting for their potential applications in materials science. Especially 3D MOFs with large pores by self-assembly can be well suited for specific recognition of small molecules and thus for their potential applications in catalysis, gas storage and separation, and chromic and luminescent sensing [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Among numerous MOFs that had been synthesized up to now, multidentate carboxylate functionalities containing ligands might be one of the most commonly employed linker due to the rigidity of its structure, the thermal stability of the chelated compounds and versatile coordination modes in one compound [17][18][19][20].…”

Color-tunable and white-light emitting lanthanide complexes based on (CexEuyTb1−x−y)2(BDC)3(H2O)4

“…The peak at about 590 nm resulted from the superposition of the transition of 5 D 4 → 7 F 4 of Tb 3+ and 5 D 0 → 7 F 1 of Eu 3+ . There might be some splits in the emission lines, which were due to the splitting of crystal field caused by lanthanide ions with different coordination environments [25,26]. The purple broad-band emission could be ascribed to the 2 D 3/2 → 2 F 5/2 and 2 D 3/2 → 2 F 7/2 transitions of Ce 3+ .…”

Researches on crystal and molecular structures of nine-coordination mononuclear K[EuIII(Edta)(H2O)3]?3.5H2O and binuclear K4[Eu2III(HTtha)2]?13.5H2O

“…One proton did not dissociate from the Ttha ligand and formed ≡NH + with one of N atoms because the acidity of aqueous solution was relatively high (pH 5.0) when this complex was synthesized. The ≡NH + has a positive charge and produces electrostatic repulsion to the Eu 3+ ion, so the N(1) and N (8) in the HTtha form cannot coordinate with the Eu 3+ ions. There are four K + ions in the complex II, in which three K + ions (K(1), K(2), and K (3)) are eight-coordinated and K(4) is nine-coordinated.…”

“…Recently, we are studying the luminescence properties and fluorescent spectra of the Eu(III) complexes with aminopolycarboxylic acid ligands at low temperature [8]. In order to explain the luminescence properties and fluorescent spectra about the Eu(III) complexes with aminopolycarboxylic acids exactly, it is very nec-essary to determine their molecular and crystal structures.…”