title: Synthesis, crystal structures, luminescent and magnetic properties of homodinuclear lanthanide complexes with a flexible tripodal carboxylate ligand.
abstract: Six new homodinuclear lanthanide(III) complexes with a flexible tripodal carboxylate ligand (H(3)L), of formulae [Ln(2)L(2)(DMF)(4)]·4DMF (Ln = La (1), Nd (2), Eu (3), Gd (4), Tb (5), Dy (6), DMF = N, N-Dimethylformamide) have been synthesized. Among them, 1, 2, 3, 4, 6 were characterized by single-crystal X-ray diffraction, which crystallized in the monoclinic space group P2(1)/n with a = 13.309(2) Å, b = 27.404(4) Å, c = 16.686(3) Å, β = 105.115(2) and V = 5875.2(17) Å(3) for 1, a = 13.3016(5) Å, b = 27.1952(12) Å, c = 16.6339(7) Å, β = 105.030(2) and V = 5811.3(4) Å(3) for 2, a = 13.2797(10) Å, b = 27.072(2) Å, c = 16.6564(13) Å, β = 104.9390(10) and V = 5785.7(8) Å(3) for 3, a = 13.2855(3) Å, b = 27.0074(6) Å, c = 16.6357(3) Å, β = 104.9790(10) and V = 5766.2(2) Å(3) for 4, a = 13.2837(5) Å, b = 26.9105(10) Å, c = 16.6066(6) Å, β = 104.917(2) and V = 5736.3(4) Å(3) for 6. The crystal structures reveal that these complexes are isostructural, and molecules are connected from 0D to 3D supramolecular structures by hydrogen bonds. All of them were characterized by elemental analysis, IR spectroscopy, XRD and TGA. Unusually, non-luminescent Tb(III) complex was obtained. The photophysical property of the Eu(III) complex and the magnetic property of Gd(III) complex are investigated and discussed in detail.
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Ai-Jiang
authors.initials: AJ
authors.lastname: Zhang
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Dou
authors.forename: Ming
authors.initials: M
authors.lastname: Dong
authors.forename: Yan-Ling
authors.initials: YL
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Tang
authors.forename: Wei-Sheng
authors.initials: WS
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Peng
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry; D005682:Gadolinium / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D008280:Magnetics; D008968:Molecular Conformation; D013050:Spectrometry, Fluorescence; D013725:Terbium / Q000737:chemistry
chemical_list: D002264:Carboxylic Acids; D056831:Coordination Complexes; D028581:Lanthanoid Series Elements; D008024:Ligands; D013725:Terbium; D005063:Europium; D005682:Gadolinium