Crystal Structure of two Lanthanide(III) Glycolate Complexes, [Lu(HOCH2COO)2(H2O)4][Lu(HOCH2COO)4] and Dy2(OCH2COO)2(HOCH2COO)2 · 4H2O. An X-Ray Diffraction and Vibrational Spectroscopic Study

Abstract

The crystal structure of [Lu(HOCH 2 COO) 2 (H 2 O) 4 ]-[Lu(HOCH 2 COO) 4 ] (1) and Dy 2 (OCH 2 COO) 2 (HOCH 2 COO) 2 · 4H 2 O (2) were determined by X-ray crystallography. The space group of 1 and 2 are P2/c and P2 1 /c, respectively. In 1, discrete anions and cations held together by hydrogen bonds form the lattice, while the structure of 2 is a 3-D network of cross-linked metalligand chains. The lanthanides are eight-coordinated by chelating glycolate ligands and water molecules with distorted dodecahedral 2 O (2) wurden mit Einkristall-Röntgenbeugung bestimmt. Die Struktur von 1 besteht aus diskreten Anionen und Kationen, die durch H-Brücken verbunden sind. Die Struktur von 2 besteht aus einem dreidimensionalen Netzwerk von miteinander verbundenen Metall-Liganden-Ketten. Die Lanthanoid-Ionen sind von chelatisierenden Glykolatliganden und Wassermolekülen achtfach koordi-

Isophthalato-Based 2D Coordination Polymers of Eu(III), Gd(III), and Tb(III): Enhancement of the Terbium-Centered Luminescence through Thiophene Derivatization

“…To date, for complexes with similar solubility characteristics, the method of choice for the isolation of X-ray-quality single crystals has been solvothermal synthesis. 3,[31][32][33][34][35][36] In fact, the few isophthalato complexes of lanthanides described have been obtained by hydrothermal synthesis. 3,4,16,19,20 In many cases, in addition to the isophthalato ligand which shows several different coordination modes, water and an additional ligand are present, such as phenanthroline or acetate.…”

“…This fact prevented us from obtaining single crystals of the metal complexes targeted through traditional methods, such as solvent diffusion. To date, for complexes with similar solubility characteristics, the method of choice for the isolation of X-ray-quality single crystals has been solvothermal synthesis. ,− In fact, the few isophthalato complexes of lanthanides described have been obtained by hydrothermal synthesis. ,,,, In many cases, in addition to the isophthalato ligand which shows several different coordination modes, water and an additional ligand are present, such as phenanthroline or acetate. ,,, We have successfully utilized gel crystallization , as an alternative method to obtaining single crystals of new lanthanide ion complexes with isophthalato (ipa) and thiophenylisophthalato (tipa) as the ligands. Even though water is coordinated to the metal ions, other auxiliary ligands are not present in these molecules.…”

2-Chloro-5-nitrobenzoato complexes of Eu(III) and Tb(III) – A 1D coordination polymer and enhanced solution luminescence

“…While most of the described systems incorporate transition metal ions, more recently systems with lanthanide ions, which display irregular coordination geometries and high coordination numbers, as well as luminescence properties have been reported [15][16][17][18][19][20][21]. The method of choice for the isolation of X-ray quality crystals of carboxylato-based coordination polymers has been solvothermal synthesis [15,[18][19][20][21][22][23][24][25][26][27]. More recently we reported isophthalato-based Eu(III), Gd(III) and Tb(III)-containing coordination polymers, which were obtained through gel crystallization [28].…”