%0 Generic
%A Li, Yan
%A Zheng, Fa-Kun
%A Liu, Xi
%A Zou, Wen-Qiang
%A Guo
%A Lu, Can-Zhong
%A Huang, Jin-Shun
%D 2006
%T Crystal Structures and Magnetic and Luminescent Properties of a
Series of Homodinuclear Lanthanide Complexes with 4-Cyanobenzoic
Ligand
%U https://acs.figshare.com/articles/dataset/Crystal_Structures_and_Magnetic_and_Luminescent_Properties_of_a_Series_of_Homodinuclear_Lanthanide_Complexes_with_4-Cyanobenzoic_Ligand/4008105
%R 10.1021/ic0602603.s007
%2 https://ndownloader.figshare.com/files/6451182
%K χ M T decreases
%K 4- Cyanobenzoic Ligand
%K 4- cba ligand
%K nonradiative dissipation
%K ray diffraction
%K bidentate 4- cba ligands
%K water molecules
%K phen
%K 4- cyanobenzoic acid
%K interaction
%K Complex 7
%K Luminescent Properties
%K Ln ions
%K H 2 O
%K eight-coordinated Ln ions
%K La ions
%K water molecules bridge
%K Homodinuclear Lanthanide Complexes
%K 4- cba ligands
%K single-crystal X
%K nine-coordinated La ions
%K terminal mode
%K crystal Structures
%X A series of homodinuclear lanthanide(III) complexes with the 4-cba ligand, [La2(4-cba)6(phen)2(H2O)6] (1) and
[Ln2(4-cba)6(phen)2(H2O)2] (Ln = Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), and Dy (7); 4-Hcba = 4-cyanobenzoic
acid; phen = 1,10-phenanthroline), have been synthesized and structurally characterized by single-crystal X-ray
diffraction. In 1, two water molecules bridge two nine-coordinated La ions, and six 4-cba ligands coordinate to the
two La ions in terminal mode. In the isostructural complexes 2−7, two eight-coordinated Ln ions are connected by
four bidentate 4-cba ligands, and another two 4-cba ligands terminate the two Ln ions. The variable-temperature
magnetic properties of 2−7 have been investigated. Complex 7 shows a significant ferromagnetic interaction between
Dy(III), while no magnetic interaction exists between Gd(III) ions in 6. In 2−5, the value of χMT decreases with
decreasing temperature, but the magnetic interactions between the Ln(III) ions cannot definitely be concluded.
Notably, the spin−orbit coupling parameters, λ, for Sm(III) (216(2) cm-1) and Eu(III) (404(2) cm-1) have been
obtained in 4 and 5, respectively. The strong fluorescent emissions of 4, 5, and 7 demonstrate that ligand-to-Ln(III)
energy transfer is efficient and that the coordinated water molecules do not quench their luminescence by the
nonradiative dissipation of energy.
%I ACS Publications