title: Structures and properties of lanthanide metal-organic frameworks based on a 1,2,3-triazole-containing tetracarboxylate ligand.
abstract: A family of 3D lanthanide metal-organic frameworks, [La(HTADIP)(H(2)O)(4)]·xH(2)O (2 < x < 2.5) (1), [Eu(HTADIP)(H(2)O)(4)]·H(2)O (2), [Tb(HTADIP)(H(2)O)(3)]·2H(2)O (3), and [Er(HTADIP)(H(2)O)(3)]·2H(2)O (4) (H(4)TADIP = 5,5'-(1H-1,2,3-triazole-1,4-diyl)diisophthalic acid), have been hydrothermally synthesized and characterized. The unsymmetrical 1,2,3-triazole-containing tetracarboxylate ligand was synthesized through the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction of diethyl-5-azidoisophthalate (M1) and diethyl-5-ethynylisophthalate (M2). Single-crystal X-ray diffraction analyses for 1-4 reveal that they are isostructural. These compounds crystallize in the monoclinic P2(1)/c space group with the rutile topology. The luminescent properties of compounds 2 and 3 were investigated and characteristic Eu(III) and Tb(III) emissions are observed. Compound 3 exhibits selective luminescent sensing behavior for Cu(2+) ions in aqueous solution. The magnetic properties of compounds 3 and 4 were studied.
authors.affiliation: State Key Lab of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, P. R. China.
authors.forename: Libo
authors.initials: L
authors.lastname: Sun
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Liang
authors.forename: Jihong
authors.initials: J
authors.lastname: Yu
authors.forename: Ruren
authors.initials: R
authors.lastname: Xu