Three rare earth-nitronyl nitroxide radical complexes [Ln(tfa)(3)(NIT-BzImH)] (Ln(III) = Gd 1, Tb 2, Dy 3; tfa = trifluoroacetylacetonate; NIT-BzImH = 2-(2'-benzimidazolyl)-4,4,5,5-tetramethylimidazolyl-1-oxyl-3-oxide) have been successfully prepared and structurally characterized. X-Ray crystallographic analysis reveals that all three complexes are isomorphous. Their crystal structures consist...

Several Pd(ii) and Pt(ii) complexes of general formula [M(Ln)(X)(Y)] have been synthesized by reaction various palladium(ii) platinum(ii) derivatives with 3-aryl or 3-benzyl 1-(2-pyridyl)-imidazo[1,5-a]pyridines (Ln).

Fluorescence spectroscopy is in many ways the ideal tool for the interrogation of complex biological systems, as it is non-invasive, sensitive, and offers high spatiotemporal resolution. For biomedical imaging luminescent probes absorbing and emitting in the red-to-near infrared (NIR) region are best suited to maximise tissue penetration and minimise damage to cellular components. NIR-emitting ...

Five new mononuclear lanthanide complexes are synthesized by adding the several nitrate hexahydrate salts, which for (Ln) Eu, Tb, Dy, Er, and Yb, with 9-anthracenecarboxylic acid (9-Hanthc) 2,2′:6,2″-terpyridine (TPY) in mixed solution of methanol dimethylformamide (DMF). The general formula is [Eu(9-anthc)3(TPY)(DMF)]·H2O (1Eu) where Eu(III) ennea-coordinated or [Ln(9-anthc)3(TPY)(H2O)]·H2O·DM...

The reactivity of a series of organometallic rare earth and actinide complexes with hemilabile NHC-ligands towards substrates with acidic C-H and N-H bonds is described. The synthesis, characterisation and X-ray structures of the new heteroleptic mono- and bis(NHC) cyclopentadienyl complexes LnCp2(L) 1 (Ln = Sc, Y, Ce; L = alkoxy-tethered carbene [OCMe2CH2(1-C{NCHCHN(i)Pr})]), LnCp(L)2 (Ln = Y)...

Lanthanide complexes of a hexaaza macrocyclic ligand containing acetohydrazide pendants (L) have been synthesised (Ln = La-Er, except Pm), and structural studies have been carried out both in the solid state and in aqueous solution. Attempts to isolate the complexes of the heaviest Ln(iii) ions (Ln = Tm-Lu) were unsuccessful. The crystal structures of the ligand and its lanthanum complex have b...

The synthesis and characterization of polynuclear lanthanide complexes and tungsten chloride clusters are detailed. The relevance of these complexes to MRI contrast agents, physiological parameter reporting MRI contrast agents, and X-ray computed tomography contrast agents is discussed. Polylanthanides, in particular polygadolinium and polyeuropium(II) complexes, represent a paradigm shift in c...

A study of the molecular magnetism hydrated salts [Ln(H2O)6Cl2]Cl (Ln = Gd (1Gd), Dy (1Dy), Er (1Er), Yb (1Yb)) and lanthanide chloride complexes with 2,2′;6′,2″-terpyridine (terpy) synthesized on their basis, [Ln(H2O)4(terpy)Cl]Cl2·3H2O (2Gd), (2Dy), (2Er), (2Yb), was carried out. It found that both initial chlorides containing Dy, Er, Yb, derivatives terpyridine exhibit properties single-mole...

Five new trinuclear complexes with formula [(CuLα ́Me)2Ce(NO3)3] (1) and [(CuLα ́Me)2Ln(H2O)(NO3)2](NO3) ̈ 2(CH3OH) (Ln = Gd(2), Tb(3), Dy(4) and Er(5)) have been synthesized using the bidentate N2O2 donor metalloligand [CuLα ́Me] (H2Lα ́Me = N,N1-bis(α-methylsalicylidene)-1,3-propanediamine) and structurally characterized. In the case of compound 1, the larger ionic radius of Ce(III) leads to a neu...