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1.
Two new coordination polymers [Cu_2(bbim)(dpa)_2(C_2H_5OH)_2](1), [Co(dpa)_2(bbbm)](2)(H_2dpa = diphenic acid, bbim = 1,1?-(1,6-hexanediyl)bis-1H-benzimidazole, bbbm = 1,1?-(1,4-butanediyl)bis-1 H-benzimidazole) constructed from bis(benzimidazole)-based ligands with different lengths and diphenic acid co-ligand have been synthesized under solvothermal conditions.Complex 1 possesses Cu-dpa helical chains. The adjacent chains are connected by the bbim ligands into two-dimensional(2D) 3-connected(63) topology. Differently, the layer structure of 2 was consisted by one-dimensional chains containing alternated 8-and 18-membered rings. Furthermore,the thermal stability and fluorescence property for all crystalline materials have been investigated. 相似文献
2.
Two new one-dimensional chain-like coordination polymers,[Cu(H2O)(dpa)- MoO4]·H2O 1 and [Co(H2O)(dpa)MoO4] 2,have been synthesized under hydrothermal reactions. Their structures were determined by single-crystal X-ray diffraction analysis. Crystal data for 1: [Cu(H2O)(dpa)MoO4]·H2O,Mr = 430.71,monoclinic,space group P21/c,a = 9.5469(10),b = 16.6874(17),c = 9.0799(10)A,β = 104.9100(10)°,V = 1397.8(3)A^3,Z = 4,Dc = 2.047 g/cm^3,F(000) = 852,μ = 2.449 mm-1,the final R = 0.0293 and wR = 0.0638 for 2472 independent reflections (Rint = 0.0338) and 2034 observed reflections with I 〉 2σ(I). Crystal data for 2: [Co- (H2O)(dpa)MoO4],Mr = 408.09,monoclinic,space group P21/c,a = 10.204(2),b = 18.933(4),c = 6.8875(16)A,β = 102.195(3)o,Z = 4,V = 1300.5(5)A^3,Z = 4,Dc = 2.084 g/cm3,F(000) = 804,μ = 2.262 mm-1,the final R = 0.0357 and wR = 0.0693 for 3022 independent reflections (Rint = 0.0436) and 2286 observed reflections (I 〉 2σ(I)). Polymer 1 is based on a one-dimensional zigzag chain built up from {Cu(H2O)(dpa)}2+ units bridged through the bidentate {MoO4}2- ligands. The chains extending along the c-axis are arranged alternately with two opposite orientations along the b-axis. The adjacent chains are stably packed together through π-π interactions and exhibit an interesting three-dimensional supramolecular architecture via hydrogen bonding interactions. Polymer 2 based on a one-dimensional zonal chain is built up from {Co(H2O)(dpa)}2+ units linked by the tridentate {MoO4}2- ligands. The ribbons extend along the c-axis. In the bc layers,there are significant interactions of N-H…O-Mo hydrogen bonds and π-π overlaps of dpa ligands between adjacent ribbons. 相似文献
3.
《结构化学》2017,(7)
Hydrothermal reactions of Bi_2O_3 with pyridine-2,6-dicarboxylic acid(2,6-H_2pdc) and trimesic acid(H3btc)/pyromellitic acid(H4pyr) lead to two bismuth-organic frameworks, namely, [Bi(2,6-pdc)(H_2btc)(H_2O)2]n(1) and [Bi_2(2,6-pdc)2(H2pyr)(H_2O)_2]n(2). Compound 1 crystallizes in the space group P2_1/c. The dimeric {Bi_2} units are linked by 2,6-pdc2-ligands to form 1D chains; Compound 2 exhibits a 2D layered structure with 44 network topology by using dimeric {Bi_2} as secondary building units(SBUs). The chains and layers in 1 and 2 are further arranged into 3D supramolecular structures via hydrogen bonding interactions. The compounds emit blue luminescence. Furthermore, the PXRD, TGA, UV-visible and IR spectra were also studied. Compounds 1, 2 represent good examples of using mixed-ligand approach to construct diversity of luminescent bismuth-organic frameworks. 相似文献
4.
A. A. Ostroushko M. O. Tonkushina N. A. Martynova 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(6):1022-1027
The sorption capacity of polyoxometallates with a buckyball structure (fullerene)
$
(NH_4 )_{42} [Mo_{72}^{VI} Mo_{60}^V O_{372} (H_3 CCOO)_{30} (H_0 O)_{72} ] \cdot 30H_3 CCOONH_4 \cdot 250H_2 O
$
(NH_4 )_{42} [Mo_{72}^{VI} Mo_{60}^V O_{372} (H_3 CCOO)_{30} (H_0 O)_{72} ] \cdot 30H_3 CCOONH_4 \cdot 250H_2 O
相似文献
5.
<正>Two novel organic-inorganic heteropolyoxometalate compounds [{Cu(1,10- phen)OH}_2]_2[V_2W_4O_19]·6H_2O (1) and [Co(1,10-phen)_3]_2[V_2W_4O_(19)]·5H_2O (2) (1,10-phen = 1,10- phenanthroline) were hydrothermally synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. Compound 1 contains a di-V substituted classical Lindqvist-type polyanion [V_2W_4O_(19)]~(4-), two dinuclear copper cations [{Cu(1,10-phen)OH}_2]~(2+) and six water molecules of crystallization. Two dinuclear copper cations [{Cu(1,10-phen)OH}_2]~(2+) consist of four transition metal coordination cations {Cu(1,10-phen)}~(2+), bridged by four hydroxyl groups. Meanwhile, both two dinuclear cations are grafted on the Lindqvist polyanion [V_2W_4O_(19)]~(4-) through two terminal oxygen (O(9)) and two μ_2-oxygen (O(6)) atoms. Such an unusual linking fashion is unique in the polyoxometalate chemistry. The basic framework of 2 is similar to that of 1 and contains one Lindqvist-type polyanion [V_2W_4O_(19)]~(4-), two six-coordinated cobalt cations [Co(1,10-phen)_3]~(2+) and five free water molecules. 相似文献
6.
LI Jian-Rong LIN Ping LI Zhi-Hua DU Shao-Wu 《结构化学》2009,28(11):1475-1479
The self-assembly reactions of [MOS3]^2- (M = W, Mo) with CuS2COCH3 in DMF produced two novel dodecanuclear Mo(W)/Cu/S heterometallic clusters, [Et4N]4[{MOS3}3Cu6S2- (CuS2COCH3)3]·H2O (1: M = W; 2: M = Mo). Cluster 1 crystallizes in hexagonal, space group P-62c with a = 16.5612(3), b = 16.5612(3), c = 16.4660(5)A, Z = 2, V = 3911.13(16)A^3, Dc = 1.935 g/cm^3, μ(MoKα) = 7.269 mm^-1, F(000) = 2192, the final R = 0.0289 and wR = 0.0789 for 2425 observed reflections (I 〉 2σ(I)). Cluster 2 is isomorphous to 1 with similar crystal parameters. X-ray analysis reveals that both clusters consist of three incomplete cubane-like cluster units {MOS3Cu3S2COCH3}, which are linked together by two μ3-S atoms. 相似文献
7.
Emil N. Rizkalla M. Abd-Elkhalek Mansour Samy S. Anis 《Transition Metal Chemistry》1989,14(2):131-134
The decomposition of hydrogen peroxide in the presence of hydroxonitrilotri(methylenephosphonato)iron(III), [Fe(NTMP)(OH)4–], was studied in nitrate media (=0.10–0.26 M) over the 0.2–0.5 mM concentration range for the iron complex and the temperature range 26–40°C. The rate law;
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