Lanthanide Complexes (Gd and Eu ) Based on a DOTA-TEMPO Platform for Redox Monitoring via Relaxivity.

Three lanthanide complexes (Ln=Gd, Eu) based on a DO3 A ([Ln(L )]) or DO2 A ([Ln(L )] ) platform appended by a redox active TEMPO-based arm were prepared. Complex [Ln(L )] shows an alkyne arm, offering the possibility of postfunctionalization by click reaction to yield [Ln(L )] . The complexes demonstrate a redox response whereby the hydroxylamine, nitroxide and oxoammonium forms of the arm can be obtained in turn.

Empowering organic-based negative electrode material based on conjugated lithium carboxylate through molecular design.

In this article, we describe the design and gram-scale synthesis of a new anthracene-based negative electrode material for Li-ion batteries. Based on rational design, featuring a strong electronic delocalization and a long conjugation length, this material has power performance to date unmatched for a conjugated lithium carboxylate, displaying a gravimetric capacity of 150 mAh g at a cycling rate of 20 Li /h (10 C) without any electrode engineering. Additionally, to the design, partial solubility of the fully reduced phase may also explain the electrochemical performances obtained at a low and high rate.

Luminescent pro-nitroxide lanthanide complexes for the detection of reactive oxygen species.

The DOTA-based ligand H3L (5) appended with a pro-nitroxide moiety has been synthesized. The europium and ytterbium complexes 5Ln show metal-centred luminescence. They react with ROS in aqueous media to give a transient iminonitroxide and a stable nitronylnitroxide radical authenticated by EPR, with change in luminescence.

Seven-coordinate lanthanide complexes with a tripodal redox active ligand: structural, electrochemical and spectroscopic investigations.

The tripodal ligand TREN-(3,5-di-tert-butylsalicylidene) (HL) was synthesized and its tris(phenolato) lanthanide complexes L-Ln (Ln = Nd, Eu, Tb, Gd, Er, Yb and Lu) were prepared. The X-Ray crystal structures confirm that each metal ion resides in a similar monocapped octahedral geometry, excluding water molecules from the coordination sphere. The coordination bond distances are in agreement with the lanthanide contraction, with Ln-O bond lengths in the range 2.

Poly[μ6-(naphthalene-2,6-di-carboxyl-ato)-bis-(aqua-lithium)].

The title compound, [Li2(C12H6O4)(H2O)2] n , crystallizes with one half of the molecular entities in the asymmetric unit. The second half is gererated by inversion symmetry. The crystal structure has a layered arrangement built from distorted edge-sharing LiO3(OH)2 tetra-hedra parallel to (100), with naphthalenedi-carboxyl-ate bridging the LiO3(OH)2 layers along the [100] direction.