A new organic-inorganic hybrid material [Na6(H2O)16(dod)2V10O28] (dod = 1,4- diazoniabicyclo[2,2,2]octane-1,4-diacetate) has been synthesized and X-ray single-crystal structural analysis reveals it crystallizes in triclinic, space group P with a = 11.533(7), b = 12.031(7), c = 12.187(4) ? a = 72.47(1), b = 73.16(1), g = 68.21(1)o, C20H64N4Na6O52V10, V = 1467(1) ?, Z = 1, Mr = 1840.1, Dc = 2.083 g/cm3, MoKa, l = 0.71073 ? m = 1.686, F(000) = 924, S = 1.027, the final R = 0.0538 and wR = 0.1272 for 4398 observed reflections. The compound has a three-dimensional frame- work constructed from decavanadate clusters, NaO chains and dod ligands. A variety of OH…O and CH…O hydrogen bonds play an important role in stabilizing the framework.
A new lanthanide complex [Sm(C2O4)(H2O)5]nCln·2nH2O has been obtained by hydrothermal synthetic method. The crystal belongs to monoclinic, space group P21/n, with a = 7.5438(6), b = 14.3201(11), c = 10.8608(9) , β = 94.565(4)o, V = 1169.55(16) 3, C2H14ClO11Sm, Mr = 399.93, Z = 4, Dc = 2.271 g/cm3, μ = 5.290 cm1, F(000) = 772, the final R = 0.0271 and wR = 0.0632 for 1880 observed reflections with I > 2σ(I). X-ray crystal analysis reveals that each Sm(III) atom is nine-coordinated by four oxygen atoms from two oxalate ligands and five coordinated water molecules in a distorted tricapped trigonal prism. The chain-like structure of lanthanide oxalate is reported for the first time. The fluorescent property and magnetic behavior of the title compound were investigated. The θ of –14.3(2)° and J of –0.26 cm-1 indicate antiferromagnetic interaction in the molecule.
The title compound ([NH3(CH2)2NH2(CH2)2NH3]BiCl6, Mr = 527.88 ) has been syn- thesized by diffusion method and its crystal structure was determined by X-ray diffraction method. It crystallizes in orthorhombic, space group P212121 with a = 6.8444(4), b = 13.6329(10), c = 15.6641(12) ?, V = 1461.60(18) ?3, Z = 4, Dc = 2.399 g/cm3, F(000) = 984, μ(MoKα) = 13.132 mm–1 and T = 293(2) K. The final R = 0.0294 and wR = 0.0490 for 2325 observed reflections with I > 2σ(I). Each bismuth atom in the present compound is coordinated by six chlorine atoms to furnish a slightly distorted octahedral geometry. It is worthy to note that each adjacent [BiCl6]3– and [H3dien]3+ entities are linked by hydrogen bonds to form two right- and left-handed helical double-chains running along the b axis. These two helical double-chains are interlaced into quadruple-stranded braid to give rise to a three- dimensional network. The optical absorption spectrum of the compound reveals the appearance of a sharp optical gap of 3.30 eV.
The ruthenium unit was introduced into the redox-active molecular poly gon to assembly new Ru-Fc metallocycles (Compound 1), in which the redox active (ferrocene) and fluoresecent (ruthenium) signaling subunits are directly attache d by the putative cation-binding sites. The compound 1 displayed high selectivit y for Ca2+ by electrochemical tests. The measurements of the fluorescence spectr a on titration of 1 with Ca2+, Li+, Na+, K+, Mg2+ or Ba2+ ion indicate the uniqu e ability of 1 to detect Ca2+ ions selectively.
In this paper we describe a new copper diphosphonate compound [NH2(C2H4)2NH2]Cu3(hedp)2(H2O)4(hedp=1 hydroxyethyli denediphosphonate, CH3C(OH)(PO3)2) synthesized under hydrothermal conditions. Single crystal structure determination reveals that the compound contains anionic ladder like chains of {Cu3(hedp)2(H2O)4}n which are linked by moderately strong inter chain hydrogen bonds, forming a supramolecular layer. The protonated piperazine fill the spaces between the layers.
