Heterodinuclear Macrocyclic Complexes Containing Both Nickel(II) and Lanthanide(III) Ions

Abstract

The macrocyclic [LnNiL]Cl3 complexes (Ln = LaIII, CeIII, PrIII, NdIII, SmIII, EuIII) contain both lanthanide and transition metal ions. The crystal structure of [LaNiL]Cl3 reveals a square planar environment of Ni(II) ion and an 8-coordinate, irregular coordination sphere of La(III) ion. The 1H and 13C NMR spectra of these compounds have been assigned on the basis of 2D techniques. The analysis of isotropic shifts of paramagnetic [LnNiL]Cl3 complexes shows the importance of both contact and dipolar contributions.

Syntheses, crystal structures and luminescent properties of two novel lanthanide/4-pya complexes: [Ln(4-pya)3(H2O)2]2 (Ln = Eu, La; 4-pya =trans-4-pyridylacrylate)

“…Lanthanide coordination compounds are the subject of intense research efforts owing to their unique structures and their potential applications in advanced materials such as Ln-doped semiconductors [1], magnetic [2], catalytic [3], fluorescent [4,5], and non-linear optical materials [6,7]. It has been proved that ligands containing both nitrogen and oxygen donor atoms are good building blocks for the formation of various lanthanide coordination compounds [8][9][10][11][12].…”

Construction of three-dimensional Ln–Ag (Ln=Eu; Tm) coordination polymers based on isonicotinate and oxalate ligands

“…Both structures display the same unusual 3D heterometallic coordination frameworks based on rare zigzag lanthanide-oxalate-silver chains, Ag 2 (IN) 3 units and IN linkers. The photoluminescent properties of complex 2 were studied.Ó 2008 Elsevier B.V. All rights reserved.In recent years, many research groups have devoted their work to the design and synthesis of lanthanide-transition heterometallic coordination frameworks with bridging multifunctional organic ligands, not only because of their fascinating topological networks, but also due to their potential applications in ion exchange, gas storage, catalysis and luminescence [1][2][3][4]. A variety of heterometallic coordination polymers have been successfully obtained from spontaneous assembly of mixed metal ions and ligands containing mixed-donor atoms such as pyridinecarboxylate, carbonyls, cyanides, amino acids and so on [5][6][7][8].…”

“…For example, Gu and Xue have successfully synthesized two isostructural heterometallic coordination polymers, LnAg(OAc)(IN) 3 [Ln = Nd and Eu; HIN = isonicotinic acid, HOAc = acetic acid]. Both polymers are constructed from infinite right-handed homochiral helical chains with Ln-O-Ag connectivity [11a].…”

“…The soft metal silver(I) ion can thus more easily coordinate to the nitrogen atom [10]. Herein, we report the systematic syntheses [13] and structures of two isostructural 3D 4d-4f coordination polymers [Ln 2 Ag 4 ( (1), Tm (2); IN = isonicotinate and ox = oxalate], which exhibit the same unusual 3D heterometallic coordination frameworks that are constructed from rare zigzag lanthanide-oxalate-silver chains, Ag 2 (IN) 3 …”

A unique 3-D 3d–4f heterometallic coordination polymer with double betaine ligand: Crystal structure and magnetic properties

“…Studies on the syntheses, structures and properties of 3d-4f heterometallic complexes have been of great interest because of their intriguing structural features and their interesting magnetic properties [1]. In particular, Cu(II)-Gd(III) heterometallic complexes are good models for the investigation on the nature of the magnetic interactions between 3d and 4f metal ions in molecular magnetic materials because the Gd(III) center with a 8 S 7/2 ground state has a simple spin system to simplify magnetic analysis, and have been extensively investigated in past decades [2,3].…”