Synthesis, crystal structures and photoluminescent properties of lanthanide supramolecular complexes with 4-oxo-1(4H)-quinolineacetate

• Published in: Journal of solid state chemistry 2010-03, Vol.183 (3), p.575-583
• Main Authors: Wang, Jun, Fan, Jun, Guo, LiangYu, Yin, Xia, Wang, ZhiHong, Zhang, WeiGuang
• Format: Article
• Language: English
• Subjects: 4-Oxo-1(4H)-quinolineacetate; Attraction; AZINES; BIPYRIDINES; COMPLEXES; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; CRYSTAL STRUCTURE; EMISSION; EUROPIUM COMPLEXES; Exact sciences and technology; GADOLINIUM COMPLEXES; Growth from solutions; HETEROCYCLIC COMPOUNDS; Hydrogen bonds; HYDROTHERMAL SYNTHESIS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Lanthanide; Lanthanides; LIGANDS; LUMINESCENCE; Materials science; MATHEMATICS; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHOTOLUMINESCENCE; PHOTON EMISSION; Physics; PRASEODYMIUM COMPLEXES; PYRIDINES; RARE EARTH COMPLEXES; SAMARIUM COMPLEXES; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Supramolecular frameworks; Supramolecular network; SYNTHESIS; TEMPERATURE RANGE; TEMPERATURE RANGE 0273-0400 K; Three dimensional; TOPOLOGY
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2009.12.027

Five new lanthanide supramolecular complexes, namely, [Sm(oqa) 2(H 2O) 4] 2 (ClO 4) 2 ·(bpy) 2 (1), [ Ln(oqa) 3]·2H 2O [ Ln=Sm( 2), Gd( 3)] and [ Ln(oqa) 2(NO 3)(H 2O)] [ Ln=Pr( 4), Eu( 5)] (oqa=4-oxo-1(4H)-quinolineacetate, bpy=4,4′-bipyridine), have been synthesized under hydrothermal conditions. These complexes exhibit three typical structure features. Complex 1 possesses a dimeric structure, which is further connected together through hydrogen bonds and π–π attractions, forming a 3D supramolecular framework. Compounds 2– 3 are isomorphous and contain 1D ring-like chains, which are further interconnected by the oqa ligands into 2D sheet-like structures. 4 and 5 exhibit eight-connected 3D network of 4 24·6 4- bcu topology. The various coordination modes of carboxylate ligands and the selection of the counterions have clearly affected the topological structures. Furthermore, the solid-state luminescent properties of complexes 1, 2 and 5 were investigated at room temperature and they show intense, characteristic emissions in the visible region. The hydrothermal reactions of the oqa molecules with varied lanthanide ions resulted in the formation of five new complexes, which exhibit three typical structure features.