The SMM behaviour of dinuclear Ln(III)-Pc multiple-decker complexes (Ln = Tb(3+) and Dy(3+)) with energy barriers and slow-relaxation behaviour were explained by using X-ray crystallography and static and dynamic susceptibility measurements. In particular, interactions among the 4f electrons of several dinuclear Ln(III)-Pc type SMMs have never been discussed on the basis of the crystal structur...

In the present work, we attempted to develop new metal coordination complexes of the natural flavonoid 5-hydroxyflavone with Sm(III), Eu(III), Gd(III), Tb(III). The resultant hydroxo complexes have been characterized by a variety of spectroscopic techniques, including fluorescence, FT-IR, UV-Vis, EPR and mass spectral studies. The general chemical formula of the complexes is [Ln(C15H₉O₃)₃(OH)₂(...

New complexes of coumarin-3-carboxylic acid (HCCA) with holmium [Ho(III)] and erbium [Er(III)] were synthesized and their structures and spectral properties were investigated by elemental analysis, IR, Raman and NMR measurements. According to the experimental data of the complexes, their formulae and geometries have been suggested. Vibrational frequencies, IR intensities and Raman activities as...

Chiral tetrakis(β-diketonate) Ln(III) complexes Δ-[NaLa(d-hfc)(4)(CH(3)CN)] (1) and Λ-[NaLa(l-hfc)(4) (CH(3)CN)] (2) (d/l-hfc(-) = 3-heptafluo-robutylryl-(+)/(-)-camphorate) are a pair of enantiomers and crystallize in the same Sohncke space group (P2(1)2(1)2(1)) with dodecahedral (DD) geometry. Typically positive and negative exciton splitting patterns around 320 nm were observed in the solid-...

The article reports the synthesis and structural characterization of a series Ln(C9H9)3 complexes with cyclononatetraenyl (Cnt, C9H9) ligand (Ln = Y, Gd, Tb, Dy, Ho, Er, Tm). Yb Sm were not obtained, reaction potassium salt Cnt trivalent halide salts corresponding metals led to known bis-Cnt sandwich compounds Ln(C9H9)2. X-ray diffraction studies on show that is significantly bent in order acco...

New three-dimensional (3D) lanthanide framework compounds supported by bridging thiocyanate ligand and K+ cations, K4[Ln(NCS)4(H2O)4](NCS)3(H2O)2(1: Ln = Dy, 2: Tb, 3: Gd) have been synthesized. A single-crystal X-ray diffraction study showed that all three were isostructural crystallized in the I 2/a space group. The ion form 2D layers with thiocyanates which are further linked [Ln(NCS)4(H2O)4...

As a result of the different degrees of stabilization experienced by the 4f, 5d, and 6s orbitals occurring upon ionization of the neutral metal, the lanthanides (La-Lu, Z ) 57-71) exist almost exclusively in their trivalent state Ln(III) ([Xe]4fn, n ) 0-14) in coordination complexes or supramolecular assemblies.1 Except for some arene compounds involving bulky substituted benzenes or cyclo-octa...

INTRODUCTION Lupus nephritis (LN) is a severe and frequent manifestation of systemic lupus erythematosus (SLE). Its pathogenesis has not been fully elucidated but immune complexes are considered to contribute to the inflammatory pathology in LN. High Mobility Group Box 1 (HMGB1) is a nuclear non-histone protein which is secreted from different types of cells during activation and/or cell death ...

The first well defined cationic terminal hydrido rare earth complexes [(NCN)LnH(THF)(3)][BPh(4)] were isolated from THF, which on recrystallization from chlorobenzene gave reversibly the novel dicationic binuclear dihydride complexes [(NCN)Ln(μ-H)(THF)(2)](2)[BPh(4)](2).

La(GaMe(4))(3) and (C(5)Me(5))La(GaMe(4))(2) are obtained by reacting La(AlMe(4))(3) and (C(5)Me(5))La(AlMe(4))(2), respectively, with GaMe(3).OEt(2). Diethyl ether as a donor reverses the commonly observed Ln-GaR(4)--> Ln-AlR(4) transformation by producing the more stable AlMe(3).OEt(2), thus making homoleptic and half-sandwich tetramethylgallate complexes of the largest rare-earth metal acces...