Structural diversity and luminescent properties of coordination complexes obtained from trivalent lanthanide ions with the ligands: tris((1H-benzo[d]imidazol-2-yl)methyl)amine and 2,6-bis(1H-benzo[d]imidazol-2-yl)pyridine

2021 ◽  
Vol 427 ◽  
pp. 213587
Author(s):  
Antonio Cruz-Navarro ◽  
Delia Hernández-Romero ◽  
Angelina Flores-Parra ◽  
José María Rivera ◽  
Silvia Elena Castillo-Blum ◽  
...  
2017 ◽  
Author(s):  
Olivier Charles Gagné

Bond-length distributions have been examined for eighty-four configurations of the lanthanide ions and twenty-two configurations of the actinide ions bonded to oxygen. The lanthanide contraction for the trivalent lanthanide ions bonded to O<sup>2-</sup> is shown to vary as a function of coordination number and to diminish in scale with increasing coordination number.


2011 ◽  
Vol 322 ◽  
pp. 337-340
Author(s):  
Lian Cai Du

A tripodal ligand, 2-acetylpyridine-tris(2-aminoethyl)amine (L), pyridine-N-oxide and their ternary complexes with rare earth nitrates have been synthesized. These new complexes with the general formula of Ln·L·PyNO·(NO3)3·nH2O (where Ln = La, Nd, Tb, Pr, Eu, n = 1~3 ) were characterized by elemental analysis, IR spectra, thermal analysis and molar conductivity. All the complexes are stable in air. The results show that the lanthanide ions in each complex are coordinated by nitrogen atoms of the ligand, oxygen atoms of PyNO and the nitrates. The fluorescent properties of the Eu(III) and Tb(III) complexes in solid were investigated.


2016 ◽  
Vol 45 (46) ◽  
pp. 18484-18493 ◽  
Author(s):  
Fei Kou ◽  
Suliang Yang ◽  
Hongjuan Qian ◽  
Lihua Zhang ◽  
Christine M. Beavers ◽  
...  

Trivalent lanthanide ions form 1 : 1, 1 : 2, and 1 : 3 complexes with tridentate ligand TMDGA in 1 M H/NaNO3 and form 1 : 3 extracted complexes with DMDODGA during solvent extraction.


2006 ◽  
Vol 6 (3) ◽  
pp. 830-836 ◽  
Author(s):  
Yang Cui ◽  
Xianping Fan ◽  
Zhanglian Hong ◽  
Minquan Wang

Synthesis process and luminescence properties of trivalent lanthanide ions (Ln3+) doped YF3 nanoparticles have been investigated. To synthesis Ln3+-doped YF3 nanoparticles, the mixture of (YCl3·nH2O + LnCl3·nH2O), and NH4F was hydrothermal treated at 180 °C in a Teflon-liner auto-clave or heated at higher temperatures (400 °C ∼ 600 °C) in a stove. The XRD patterns showed that the Ln3+-doped orthorhombic YF3 nanoparticles with no second phase have been prepared. The solid solution Y1−xEuxF3 (x = 0 ∼ 0.4) nanoparticles have been synthesized. The luminescence concentration quenching resulted from resonance energy transfer between neighboring Eu3+ ions occurred at higher Eu3+ concentrations (30 mol%). The upconversion luminescence of Er3+−Yb3+ codoped YF3 nanoparticles under 980 nm excitation has also been observed. With increase of heated temperature, the size of the Er3+−Yb3+ codoped YF3 nanoparticles increased gradually, and upconversion luminescence intensity increased significantly.


Author(s):  
Anca Emandi ◽  
Mariana Balasoiu ◽  
Tudor Rosu

1-(2-Benzthyazolyl)-3-methyl-4-azo-(4-nitrophenyl)-Pyrazolyn-5-one (HL) possesses a chelating behavior. Its chelates with a number of trivalent lanthanide ions Pr(III), Sm(III),Gd(III), Ho(III), La(III) of the type Na3[Ln(L)2(OH)4] have been isolated and characterized on the basis of their elemental analyses, IR and visible spectra, magnetic and molar conductance studies, thermal and X-ray analysis and molecular weight determinations. All chelates have a monomeric octa-coordinated stn1cture and square antiprismatic (C2) symmetry.


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