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1.
The solvothermal reaction of Hbta (Hbta = benzotriazole) and Ni(NO3)2·6H2O yielded a blue block crystal, [Ni9(bta)12(NO3)6(DMA)6]·3DMA (1), (DMA = N,N-dimethylacetamide), which has been characterized by various measurements including elemental analysis, thermogravimetric (TG) analysis, infrared (IR) spectrum, powder X-ray diffraction (PXRD), and X-ray single-crystal diffraction. In compound 1, three crystallographic independent Ni2 + ions are connected by two types of Hbta ligands to generate a centrosymmetric nine-nuclear {Ni9} cluster, which could further form a 3D supramolecular network through intra- and intermolecular hydrogen bonds. The TG curve of 1 exhibits a weight loss between 25 and 330 °C, being in accordance with the release of DMA. Furthermore, the variable-temperature magnetic susceptibility of 1 has studied, and the results indicate that antiferromagnetic interactions exist among Ni2 + ions. 相似文献
2.
A novel metal-organic framework, [Co6(μ3-OH)4(ndc)4(bip)2(H2O)2]n (1)[H2 ndc = 1,4-naphthalenedicarboxylic acid, bip = 1,5-bis(imidazole-1-yl)pentane], constructed from unique [Co6(μ3-OH)4]8 +n chains containing alternate [Co4(OH)2]6 + and [Co2(OH)2]2 + subunits, was reported, which has a new (3,3,8,12)-connected or 12-connented fcu/cubic network and shows weak antiferromagnetic interaction between the adjacent Co(II) ions mediated through the carboxylate and hydroxyl groups. 相似文献
3.
Two transition metal coordination polymers (CPs), namely, Cd(1,4-NDC)(py) (1), Co2(1,4-NDC)2(DMF)2 (2) (1,4-NDCH2 = 1,4-naphthalenedicarboxylic acid, py = pyridine, DMF = N,N-dimethylformamide) have been synthesized and characterized. Compound 1 contains one-dimensional chains, which are further linked by the NDC2 − ligands to form a three-dimensional framework with a 5,5T2 topology network. There exist two types of left-hand helical chains interconnected to each other through the Cd(II) center in compound 1. Although compound 2 has been reported previously, in this work the synthetic method of 2 is modified to obtain high quality crystals. In addition, the magnetic property of compound 2 is investigated, which shows the metamagnetic behavior induced by the external field. 相似文献
4.
Presented here are two new zinc phosphites, formulate as Zn3(dabco)2(HPO3)3 (1, dabco = 1,4-diazabicyclo[2·2·2]octane), and H2pmdeta ⋅ Zn3(HPO3)4 (2, pmdeta = N,N,N′,N″,N″-pentamethyldiethylenetriamine). Compound 1 has 12-membered-ring (12 MR) channels with a 5-connected bnn topology containing 4 = 1 secondary building units. Compound 2 has multidirectional 10 MR channels with a pcu topology constructed from 6*1 secondary building units. The gas adsorption and fluorescent properties of compound 1 were also investigated. 相似文献
5.
A new dinuclear cobalt compound, namely Co2(L)(H2O)Cl2 (1, H2L = N,N′-o-phenylenebis(salicylide-neimine) was obtained by one-pot solvothermal self-assembly of CoCl2, 1,2-phenylenediamine, and salicylaldehyde in C2H5OH. The magnetic studies suggest weak antiferromagnetic behavior and the magnetic data were interpreted by means of a dinuclear cobalt model with the parameters of g = 2.12, J = ?1.25 cm?1, θ = ?3.12 K. 相似文献
6.
《Inorganic chemistry communications》2008,11(10):1159-1161
Thin films of halide free Cu–Co mixed metal oxide have been prepared at 390 °C from the heterobimetallic complex Co4(THF)4(TFA)8(μ-OH)2Cu2(dmae)2 · 0.5C7H8 (1) [dmae = N,N-dimethylaminoethanol ((CH3)2NCH2CH2O−), TFA = triflouroacetate (CF3COO−), THF = tetrahydrofurane (C4H8O)] which was prepared by the reaction of [Cu(dmae)Cl]4 and Co(TFA)2 · 4H2O. The precursor was characterized for its melting point, elemental composition, FTIR and X-ray single crystal structure determination. Thin films grown on glass substrate by using AACVD out of complex 1 were characterized by XRD and SEM. TGA and AACVD experiments reveal it to be a suitable precursor for the deposition of halide free Cu–Co mixed-metal oxide thin films at relatively low temperatures. 相似文献
7.
《Inorganic chemistry communications》2008,11(10):1243-1245
Compound Co3(hpyedpH)2(H2O)4 · H2O (1) (hpyedpH4 = 1-hydroxy-2-(3-pyridyl)ethylidene-1,1-diphosphonic acid) has a layer structure where chains of {Co3(hpyedpH)2(H2O)4}n are connected by {CPO3} tetrahedra, generating a layer containing 4-, 8- and 16-membered rings. Magnetic measurements show that compound 1 is a ferrimagnet with Tc = 3.8 K. Slow magnetic relaxation is observed below 3.8 K, possibly due to the domain wall movement. 相似文献
8.
Two new 3-D coordination polymers bearing linear trinuclear secondary building blocks with mixed bridging ligands, {[Ni3(tbip)2(Htbip)2(bib)2]·4H2O}n (1) and {[Co3(tbip)2(Htbip)2(btb)2]·4H2O}n (2) (H2tbip = 5-tert-butyl isophthalic acid, bib = 1,4-bis(imidazol-1-yl)butane, btb = 1,4-bis(1,2,4-triazol-1-yl)butane), were obtained and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, single-crystal X-ray crystallography and powder X-ray diffraction. Both complexes 1 and 2 display similar 3D 6-connected pcu networks containing the linear trinuclear [M3(COO)6] (M = Ni and Co) clusters as nodes. 相似文献
9.
Zhong-Yi Liu Xiang-Jun Shi En-Cui Yang Xiao-Jun Zhao 《Inorganic chemistry communications》2010,13(11):1259-1262
A 3D pillared-layer porous framework, {[Co2(H2O)(μ3-OH)(ptz)(nip)]·2H2O}n (1) (ptz = 5-(4-pyridyl)tetrazolate, nip = 5-nitroisophthalate), was in situ hydrothermally synthesized and structurally and magnetically characterized. Interestingly, the layered substructure of 1 consists of scarcely observed corner-sharing Co2(μ3-OH) ?-chain and unprecedented pentadentate ptz ligand. More importantly, due to the mixed triple syn,syn-carboxylate-μ3-OH-μ4-tetrazolyl bridges as well as the triangular CoII arrangement, 1 behaves as a typical antiferromagnetically coupled paramagnet with a slight spin frustration, which exhibits a low-dimensional antiferromagnetic ordering below 10 K (Neel Temperature). 相似文献
10.
《Microporous and mesoporous materials》2007,98(1-3):16-20
Deprotonation of 4,4′-biphenyldicarboxylic acid (H2BPDC) with triethylamine followed by the copolymerization with Y(III) in N,N-dimethylformamide (DMF) at room temperature yields a new three-dimensional (3-D) porous metal–organic coordination network, [Y2(BPDC)3(DMF)2(H2O)2]n · (DMF)n · (H2O)n (1). Compound 1 (C24.50H19N1.50O9Y) crystallizes in the triclinic P-1 space group (a = 8.220 (2), b = 13.998 (4), c = 14.212 (4) Å, α = 111.058 (5)°, β = 90.187 (5)°, γ = 94.318 (5)°, V = 1520.9 (7) Å3, and Z = 2). X-ray crystallography reveals that 1 consists of a 3-D framework contained open 1-D channels with the dimension of 5 × 10 Å along the crystallographic a axis. The adsorption measurements show that compound 1 can adsorb N2, Ar and CO2 into its pores. The adsorption isotherms for MeOH and H2O were also measured. 相似文献
11.
Through the radical copolymerization of MMA (methyl methacrylate) with a vinyl-containing complex monomer {[Yb4(L)2(HL)2(μ3-OH)2(NO3)2]·(NO3)2} (1; H2L = N,N′’-bis-(5-(3′-vinylphenyl)-3-methoxy-salicylidene)cyclohexane-1,2-diamine), the first example of PMMA-supported and Yb4(Salen)4-containing metallopolymer Poly(1-co-MMA) exhibits significantly improved physical properties besides relatively higher NIR quantum yields (ΦYbYb = 1.18% and ΦLYb = 0.86%) than those (ΦYbYb = 1.02–1.04% and ΦLYb = 0.73–0.75%) of complex monomer 1 in solution and 1@PMMA in solid state. 相似文献
12.
A cyanide-bridged FeIII–CoII heterometallic complex {[Fe(1-CH3im)(CN)5][Co(H2O)2]}n·3H2O (1-CH3im = 1-methylimadazole) (2) has been synthesized by the reaction of CoII(ClO4)2·6H2O with the pentacyanideferrite(III) building block (Ph4P)2[FeIII(1-CH3im)(CN)5]·4.5H2O (1). X-Ray single crystal diffraction analysis shows that complex 2 has a two-dimensional (2D) grid-like structure. Magnetic investigations show that complex 2 displays long-range antiferromagnetic ordering with TN = 9.45 K. The typical metamagnetic behaviors were observed with the critical field of ca. 4000 Oe at 1.82 K. 相似文献
13.
《Inorganic chemistry communications》2007,10(11):1276-1280
Two-dimensional (2D) metal-organic supramolecular polymer [Co2(μ2-4,4′-bipy)2(μ2-be)2(be)2]n 1 (4,4′-bipy = 4,4′-bipyridine, be = benzoate) has been synthesized by low-temperature solid-state reaction and characterized by single-crystal X-ray diffraction, elemental analyses, TGA, IR spectra and UV–visible spectra. The 2D structure is built from the linkage of secondary building units of binuclear [Co2(μ2-4,4′-bipy)2(μ2-be)2(be)2] clusters by a mixed connector of 4,4′-bipyridine and benzoate. The third-order non-linear optical (NLO) properties of the 1 were also investigated and they exhibit the reverse saturable absorption and self-defocusing performance with modulus of the hyperpolarizability (γ) 8.30 × 10−30 esu for 1 in a 2.70 × 10−4 mol dm−3 DMF solution. 相似文献
14.
Two new Mn(II) and Co(II) coordination polymers with azide and zwitterionic dicarboxylate ligands L1 and L2 (L1 = [4-((1-carboxylatobenzyl)pyridimium-3-yl) benzoic acid] chloride, L2 = [1,1′-bis(4-carboxylatobenzyl)-4,4′-bipyridinium] dichloride) were synthesized and structurally and magnetically characterized. They are formulated as [Mn3(L1)4(N3)(CH3CH2OH)(H2O)]ClO4·4H2O (1) and [Co3(L2)4(N3)2(H2O)2]·4NO3 (2). Compound 1 contains two different linear trinuclear [Mn3(COO)8(CH3CH2OH)2]2 − and [Mn3(COO)6(H2O)2(N3)2]2 − units built from the mixed bridges of (μ-COO)2(μ2-Ocarboxylate). The trinuclear units are alternately linked into 1D chains by L1. Compound 2 contains linear trinuclear [Co3(N3)2(COO)4(H2O)2] units built from the mixed bridges (μ-COO)2(μ-H2O). Magnetic studies demonstrated that the mixed triple bridges are antiferromagnetic in compounds 1 and 2. 相似文献
15.
Hua-Hong Zou Xian-Hong Yin Xiao-Jun Sun Yan-Ling Zhou Sheng Hu Ming-Hua Zeng 《Inorganic chemistry communications》2010,13(1):42-45
A new 2D coordination polymer with the formula [Co4(μ3-OH)2(H2nip-2H)2(H2nip-H)2(bpe)2]n (1) (H2nip = 5-nitro-isophthalic acid, bpe = trans-1,2-bis(4-pyridyl)ethylene), has been hydrothermally synthesized and structurally characterized. The structure of 1 is built around uncommon, rhombic {Co4} clusters with double Td and double Oh Co(II) geometries, which are extended into 2D network by the rigid deprotonated H2nip and bpe bridges. Magnetic property study indicates there is weak antiferromagnetic coupling interaction between Co(II) ions, which mainly arises from the antiferromagnetic coupling interaction in the tetramer, based on the nature of the μ3-hydroxyl group and syn–syn carboxylate-bridged modes. 相似文献
16.
Tao Wei Shunsheng Zhao Weiyu Bi Xingqiang Lü Yani Hui Jirong Song Wai-Kwok Wong Richard A. Jones 《Inorganic chemistry communications》2009,12(12):1216-1219
With the Zn-Schiff-base [ZnL(Py)] from the simple Salen-type Schiff-base ligand H2L (H2L = N,N′-bis(salicylidene)ethylene-1,2-diamine) as the precursor, two co-crystallized heterometallic (Zn2Ln and ZnLn array) complexes [Zn2Ln(L)2(Py)2(NO3)2]·[ZnLn(L)(Py)(NO3)3(H2O)]·NO3·mMeOH·nS (Ln = Er(1), S = CH3CN, m = 2, n = 1 or Gd(2), S = H2O, m = 1, n = 3) were obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The result of their photophysical properties shows the intramolecular effective energy transfer has been demonstrated in the Zn2Er and ZnEr arrayed complex 1, and the co-existence of different chromophores should be a potentially new way to the fine-tuning properties of NIR luminescence from Er3+ ions. 相似文献
17.
The cobalt(II)–lanthanide(III) heteronuclear complexes [Ln(H2O)4Co2(TTHA)(SCN)2]·H3O+ (H6TTHA = triethylenetetraaminehexaacetic acid, Ln = La(2), Ce(3)) have been synthesized based on a binuclear building block of [Co2(H2TTHA)(H2O)2] in [Co2(H2TTHA)(H2O)2]·4H2O (1). Single-crystal structures show that complex 1 is a binuclear complex, containing the [Co2(H2TTHA)(H2O)2] unit as a useful building block. Adding the La3 + and Ce3 + ions to this synthesis system, two new 3d-4f mixed complexes 2 and 3 were obtained. Complexes 2 and 3 show 3D framework, comprising an infinite 1D (one-dimensional) chain based on heterometallic Ln2Co2 (Ln = La(2), Ce(3)). Further investigations such as IR spectra, UV–vis spectra, TGA, XRD and magnetic properties were studied. 相似文献
18.
《Inorganic chemistry communications》2007,10(8):906-909
Vanadium complexes are extensively used in the chemical industry as oxidation catalysts. During the course of our investigations into vanadium oxidation catalysis, the rich reactivity of a vanadium(III) scorpionate analogue complex, (CpPOEtCo)VCl2(DMF) (1), was investigated. The octahedrally coordinated 1 was prepared by mixing vanadium(III) chloride with Na(CpPOEtCo) in DMF. The crystal structure of 1 has been determined through X-ray diffraction. Complex 1, C20H42Cl2CoNO10P3V, crystallizes in the monoclinic space group P21/c with a = 38.566(9) Å, b = 9.499(2) Å, c = 18.149(4) Å, and β = 100.485(4)° with Z = 8. Complex 1 was found to be an effective pre-catalyst for the oxidation of 3,5-di-tert-butylcatechol to 3,5-di-tert-butylquinone. The reactivity studies, oxidative catalytic ability, as well as X-ray structural characterization of (CpPOEtCo)VCl2(DMF) will be discussed. ((CpPOEtCo) = [η5-cyclopentadienyltris(diethylphosphito-κ1P) cobaltate(III)−; DMF = N,N-dimethylformamide). 相似文献
19.
The structure of compound [Cd2(NDC)2(L)2(H2O)]·0.5DMF (1) (NDC = 1,4-naphthalenedicarboxylate, L = pyrazino[2,3-f][1,10]phenanthroline and DMF = N,N′-dimethylformamide) is reported. Two independent Cd(II) atoms in a distorted [CdO4N2] octahedral environment and three unique NDC ligands showing different coordination modes give strongly undulated two-dimensional grid motifs. Dangling L ligands are chelated to every Cd(II) atom decorating both sides of the layers. Due to the marked undulation of the layers, the large open windows are threaded by the dangling ligands of other layers producing a three-dimensional polythreaded supramolecular array that can be also described as a single three-dimensional framework if the extended columnar face-to-face π–π interactions are considered. 相似文献
20.
Shengjun Deng Ning Zhang Weiming Xiao Chao Chen 《Inorganic chemistry communications》2009,12(2):157-160
A double-T-shaped ligand (H4BPTC) as the spacer has been first used to direct the assembly of a 2D coordination polymer with brickwall network topology, [Cu2(BPTC)(Im)4(H2O)(DMF)]n (1) (DMF = N,N-dimethylformamide, H4BPTC = Biphenyl-3,3′,4,4′-tetracarboxylic acid, Im = imidazole), which exhibits an interesting framework dynamic upon de-/resolvation. 相似文献