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Four nickel(II)-5-aminodiacetic isophthalate coordination polymers with different auxiliary ligands are synthesized by the solvothermal method. {[Ni4(adip)2(H2O)10]·6H2O}n(1) (H4adip = 5-aminodiacetic isophthalic acid) is a supermolecular structure assembled by two-dimensional (2D) layers, and it can be viewed as a novel binodal (3,4)-connected topological net with a Schläfli symbol of (4.6.8)4(62.82.102) which has not been reported in the literature. When dipyridyl auxiliary ligands with different spacers are engaged in the reactions to pillar the 2D layers of 1, the 3D frameworks of complexes 2–4are obtained. {[Ni3(Hadip)2(bpy)2(H2O)4]·9H2O}n(2) (bpy = 4,4′-bipyridine) was crystallographically characterized to be a three-dimensional (3D) coordination network with SPC519 type topology. {[Ni8(adip)4(bpy)(H2O)18]·10H2O}n(3) as a 3D framework exhibits a scarcely reported (3,5)-connected topology with a Schläfli symbol of (4.6.8)4(62.86.102). {[Ni2(adip)(bpp)(H2O)2]·2H2O}n(4) (bpp = 1,3-bis (4-pyridyl)propane) features a 3D chiral framework composed of the achiral reagents adip4–and bpp, resulting a new (4.52)(4.53.72.84) topology. Meanwhile, the influences of configuration and length of the auxiliary ligands on the structures are investigated. The magnetic studies indicate antiferromagnetic behaviors for complexes 1and 3, and as their metal–metal distances in the dinulcear units increase the antiferromagnetic interactions become stronger. [ABSTRACT FROM AUTHOR]

A series of luminescent lanthanide coordination complexes, [Eu2(hqc)6(H2O)4]·8H2O (1), [Ln2(hqc)6(H2O)2(DMF)2]·2H2O (Ln = Eu (2), Dy (3), Ho (4)), and [Ln2(hqc)6(H2O)4]·2H2O·2DMF (Ln = Ce (5), La (6), Pr (7); Hhqc =2-hydroxyquinoline-4-carboxylic acid), have been synthesized via evaporative crystallization and then characterized by single-crystal X-ray diffraction. Complexes 1−7are nine-coordinated lanthanide(III) complexes with distorted tricapped trigonal prism geometry around each metal center. The dinuclear units in 1−7form the two-dimensional square networks and further extend to three-dimensional supramolecular frameworks through the π−π stacking and strong hydrogen bonding interactions. The optical properties of complexes 1−7in both the solid state and solution state were investigated in detail at room temperature and 10 K. The results show that the Eu3+ions in 1and 2could be highly sensitized by the hqc−ligands and thus emit intense red luminescence with long lifetimes, while complexes 3and 5−7exhibit the characteristic blue luminescence. Furthermore, X-ray diffraction and thermogravimetric analysis of 1−7are also studied, which demonstrate their high purities and good thermal stabilities. [ABSTRACT FROM AUTHOR]

Reactions of 2,2′-dihydroxyl-[1,1′]-binaphthalene-3,3′-dicarboxylate acid (H2bna) with manganese chloride by a solvent or solvothermal method in the presence of pyridine (py) or 4-picoline (pic) give birth to three 1D to 3D frameworks: [Mn(bna)(DMF)2(H2O)2]n·nDMF (1), {(Hpic)2[Mn3(bna)4(C2H5OH)2(H2O)2]·5H2O}n(2), and {(Hpy)2[Mn3(bna)4(py)2(H2O)2]·4H2O}n(3) (DMF = N,N′-dimethylformamide). Crystal structure analyses reveal that 1is a mesomer with equivalent R- and L-helical rectangular tubes constructed from homochiral ligands, which is further assembled into a 3D supramolecular network through hydrogen bonds and C−H···π interactions. Complex 2consists of a (4,4) grid chiral layer structure, while 3features a 3D cubic diamond network with Schläfli symbol 66topology, though they both comprise of [Mn3(μ2-COO)6(COO)2] pinwheel molecular building blocks which act as 4-connected nodes and bna2−as linkers. Magnetic studies indicate that antiferromagnetic couplings exist in both 2and 3. [ABSTRACT FROM AUTHOR]

A porous anionic framework with cubic symmetry and multi-intersecting open channels, H2tmdp3In6(btc)8·40H2On (1) (tmdp 4,4‘-trimethylene dipiperidine, H3btc1,3,5-benzenetricarboxylic acid), is reported. Complex1crystallizes in the cubic space group I3d (abc20.3732(8) Å, V8456.2(6) Å3, and Z2). Its cagelike units, In9(btc)11, constitute a large accessible void with 65.4% of the total volume. The cationic guests located in the channels can be exchanged with inorganic ions, such as K, NH4, Ca2, Sr2, and Ba2. [ABSTRACT FROM AUTHOR]

A novel three-dimensional (3D) microporous lanthanide−organic framework [Nd(2,5-pydc)(Ac)(H 2O)] n·2 nH 2O ( 1) has been prepared under hydrothermal conditions. The results of an X-ray crystallographic analysis revealed that compound 1has a 3D nanotubular structure. From the topological point of view, the intricate 3D framework of compound 1can be specified by the Schläfli symbol (4 26 38) as a zeolite ABW net. The H 2adsorption isotherm at 77 K shows an uptake of 132 cm 3g −1at 1.0 atm. [ABSTRACT FROM AUTHOR]