共查询到20条相似文献,搜索用时 15 毫秒
1.
S. A. Sapchenko E. S. Saparbaev D. G. Samsonenko D. N. Dybtsev V. P. Fedin 《Russian Journal of Coordination Chemistry》2013,39(8):549-552
Heating of zinc(II) nitrate and 2,5-thiophenedicarboxylic acid (H2Tdc) in the presence of hexamethylenetetramine in N-methylpyrrolidone (Nmp) gave the crystals of a layered coordination polymer [Zn2(Nmp)2(Tdc)2] · 2Nmp · 0.5H2O, which were studied by X-ray diffraction. The compound was characterized by IR spectroscopy, elemental and thermogravimetric analyses, and luminescence measurements. 相似文献
2.
Yan Yang Chang-Gui Li Xu-Jian Luo Zhi-Hui Luo Rong-Jun Liu 《Supramolecular chemistry》2013,25(4):281-286
A new complex associated with Cd2+, [Cd(OH-H2Bdc)(2-Pbim)]n (1), (OH-H2Bdc = 5-hydroxyisophthalic acid, 2-Pbim = 2-(2-pyridyl)benzimidazole), has been synthesised under hydrothermal conditions and characterised by elemental analysis, FT-IR spectroscopy, TG/DTG and fluorescence spectrum. Its in vitro cytotoxicity towards four selected tumour cell lines has been evaluated by an microculture tetrozolium assay, the results suggest that complex 1 displays greater inhibition than the free benzimidazole ligand. On the basis of the combination of absorption titration and fluorescence emission titration, the binding mode of complex 1 to calf thymus DNA has been investigated. Complex 1 can interact with the base pairs of double-helical DNA via the combined mode of intercalation and groove binding with larger binding constants. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(18):2009-2013
A one-dimensional coordination polymer [Co(μ 1,3-NCS)2(npdo)2] n (npdo?=?4-nitropyridine N-oxide) has been synthesized and structurally determined by X-ray crystallography. The complex crystallizes in the orthorhombic space group of Pbcn with a?=?22.688(5)?Å, b?=?7.2636(17)?Å, c?=?10.299(2)?Å. Adjacent Co(II) ions are coordinated by two μ 1,3-SCN? bridging ligands, forming a one-dimensional chain along the c axis and the npdo coordinates to Co(II) ion as a terminal ligand. The thermal variation of the magnetic moments of the complex reflects the antiferromagnetic interaction between the bridged Co(II) ions above 20?K and the ferromagnetic transition or the strong short-range spin interaction below 20?K. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(13):2271-2279
A new complex, {[Mn3(oba)2(IP)2(CH3COO)2]·H2O}n (1) (H2oba?=?4,4′-oxybis(benzoic acid), IP?=?1-H-imidazo[4,5-f][1,10]-phenanthroline), has been synthesized and structurally characterized by single-crystal diffraction analysis. The structural determination revealed that 1 has a 2-D grid motif, which can be further linked into a 3-D porous network via packing interactions. The magnetic properties of 1 are discussed. 相似文献
5.
A bimetallic coordination polymer, infinity (2)[{LNi (II)Co (II)}(dca) 2], has been constructed from heterobinuclear [Ni (II)Co (II)] nodes and dicyanamido spacers [L (2-) is the dianion of the Schiff base resulting from the 2:1 condensation of 3-methoxysalicyladehyde with 1,3-propanediamine; L (2-) = N, N'-propylenebis(3-methoxysalycilideneiminato)]. The intranode Co (II)-Ni (II) interaction was found to be ferromagnetic because of the orthogonality of the magnetic orbitals. Below 12 K, the onset of the canted ferromagnetic ordering is observed. 相似文献
6.
Zhang JY Ma Y Cheng AL Yue Q Sun Q Gao EQ 《Dalton transactions (Cambridge, England : 2003)》2008,(15):2061-2066
A new two-dimensional (2D) coordination polymer with mixed pyrimidine-2-carboxylate (pymca) and oxalate (ox) bridges, [Mn(2)(pymca)(2)(ox)(H(2)O)(2)](n) (1), was synthesized by a hydrothermal reaction involving the in situ formation of the pymca and ox ligands from 2-cyanopyrimidine (pymCN), and its structure and magnetic properties were characterized. The dianionic ox and monoanionic pymca ligands are both potentially bis(chelating) and have been used to construct anionic and cationic 2D honeycomb networks [(6,3) net], respectively. In the present compound, ox assumes the usual bis(chelating) bridging mode, but pymca serves as a tridentate bridge with one of the pyrimidyl nitrogens uncoordinated. The two different bridges collaborate to generate a highly undulated 2D layer with the (6,3) net topology, and the layers are closely packed in parallel through pi-pi interactions between pyrimidyl rings and hydrogen bonds involving coordinated water molecules, oxalate oxygens, and uncoordinated pyrimidyl nitrogens. Magnetic measurements reveal that the compound is a spin-canted antiferromagnet with weak ferromagnetic transition below T(c) = 2.4 K. 相似文献
7.
Two new Ni(II) coordination polymers, namely [Ni3(Hsdac)2(sdac)2(2,2′-bipy)2] (1) and [Ni2(sdac)2(4,4′-bipy)2]·2H2O (2) (sdba = 4,4′-sulfonyldibenzoate, 2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine), have been prepared under hydrothermal conditions and characterized by single crystal X-ray diffraction analyses. Compound 1 possesses an interesting chain structure. Adjacent chains are further linked through H-bond interactions between Hsdac ligands to give a two-dimensional (2D) supramolecular architecture. Compound 2 displays an unusual 2D polyrotaxane-like network. 相似文献
8.
9.
《Journal of Coordination Chemistry》2012,65(9):1518-1524
A manganese(II) coordination polymer [Mn(TMB)2?·?H2O] n (1) (HTMB?=?3,4,5-trimethoxybenzoic acid) has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, powder X-ray diffraction analysis, spectroscopic (IR, solid state UV-Vis), and thermal methods. The crystal belongs to orthorhombic system, space group P212121, with cell parameters a?=?7.3001(8), b?=?11.4146(13), c?=?27.053(3)?Å, α?=?β?=?γ?=?90°, V?=?2254.3(4)?Å3, Z?=?4. In 1, TMB in two different coordination modes bridges six-coordinate manganese(II) centers forming a 1-D infinite chain coordination framework. The spectral and thermal properties of the complexes have also been studied. 相似文献
10.
A new 1D chiral metal-organic coordination polymer constructed by Cu(II) with L-3-Cyanophenylalanine
A new 1D chiral metal-organic coordination polymer [Cu(Cphe)2] · 3H2O (I) (HCphe = L-3-Cyanophenylalanine) has been synthesized in an aqueous solution and characterized by elemental analysis, thermogravimetric analysis (TGA), X-ray powder diffraction (XRPD), infrared spectroscopy (IR) and single crystal X-ray diffraction. The X-ray diffraction analysis reveals that I crystallizes in the monoclinic space group P21. The adjacent copper(II) atoms are linked by Cphe ligands to form a 1D zigzag chain, which is further connected via strong hydrogen bonds to form a 3D supramolecular framework. The unit cell parameters for I are: a = 12.0201(8), b = 6.1495(4), c = 14.8576(10) Å, β = 94.1720(10)°, V = 1095.00(13) Å3, and Z = 2. 相似文献
11.
A manganese(II) complex with N,N′-bis(carboxymethyl)dithiooxamide (H4GLYDTO), [Mn(H2GLYDTO)(H2O)2]n, has been synthesized and characterized by elemental analysis and thermogravimetric analysis, as well as by infrared, electronic and EPR spectroscopy and magnetic susceptibility measurements. The crystal and molecular structure of this complex was determined by single-crystal X-ray structure analysis. The compound shows a 3D porous framework with alternate left- and right-handed helical channels where the manganese(II) ions have an octahedral environment. Variable temperature magnetic measurements reveal the existence of very weak antiferromagnetic interactions through the syn-anti carboxylate bridge, with an exchange parameter of J/k = −0.12 K. 相似文献
12.
A three‐dimensional (3D) manganese (II) coordination polymer: Synthesis,structure and catalytic activities
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A new Mn (II)‐containing coordination polymer, [Mn6(Ipa)6(ad)?6H2O] ( 1 ; Ipa = isophthalate ligand; ad = adenine), was synthesized by reacting hydrated manganese nitrate with isophthalic acid and adenine under solvothermal reaction conditions. Polymer 1 was characterized using single‐crystal X‐ray diffraction analysis and other techniques such as Fourier transform infrared spectroscopy, elemental analyses and powder X‐ray diffraction. The solid‐state structure of 1 confirmed the formation of a three‐dimensional framework structure based on Mn6 secondary building units. Phase purity of bulk 1 and its thermal stability were investigated. Polymer 1 was evaluated for its performance as a heterogeneous catalyst for the Henry (nitroaldol) reaction of nitromethane with several aldehydes. The recyclability of 1 and heterogeneity of the reaction were also explored. A plausible mechanism for such reaction is proposed. To the best of our knowledge, polymer 1 represents the first example of a Mn (II)‐ and adenine‐containing coordination polymer as well as the first example of a Mn (II)‐containing coordination polymer that has been employed for the Henry reaction. 相似文献
13.
A new two-dimensional layered cadmium coordination polymer [Cd(D,L-mal)H2O]
n
(H2mal = malic acid) is solvothermally synthesized and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction.
Each Cd(II) centre is surrounded by seven oxygen atoms from three different malate ligands and one coordinated water molecular
forming a pentagonal bipyramidal configuration. Furthermore, complex 1 exhibits blue intense photoluminescence property at room temperature. 相似文献
14.
Zheng-Bo Han Zhen-Ning Lou Yu-Chun Jiang Li-Tian Zhang Li Liu 《Transition Metal Chemistry》2007,32(2):219-223
A metal-organic framework, [Co2(pydc)2(bpy)2]
n
· 2nH2O (1) (H2pydc = pyridine-3,4-dicarboxylic acid, bpy = 4,4′-bipyridine), was synthesized under hydrothermal conditions. X-ray diffraction
experiments reveal that (1) exhibits a chiral 3D metal-organic framework, which represents the rare example of 3D chiral coordination polymers containing
two kinds of organic ligands. Temperature-dependent magnetic susceptibility for (1) was also studied.
Electronic Supplementary Material Supplementary material is available to authorised users in the online version of this article at . 相似文献
15.
Gavrilenko KS Punin SV Cador O Golhen S Ouahab L Pavlishchuk VV 《Inorganic chemistry》2005,44(16):5903-5910
Three new homo- and heterometallic hexanuclear complexes [Mn(2)M(II)(4)O(2)(PhCOO)(10)(DMF)(4)] (with M = Mn (1), Co (2) or Ni (3) and DMF = dimethylformamide) have been synthesized by redox generation of benzoate ligands from benzaldehyde in a one-pot reaction. All of the compounds are isostructural and crystallize in the I-42d space group of the tetragonal system, data for 1: a = 27.2249(8) Angstroms, c = 25.5182(5) Angstroms, R1 = 0.0681. The crystal structure contains isolated molecules. Each molecule consists of 2 x Mn(III) surrounded by four M(II) ions to form two edge-sharing OMn(2)M(2) tetrahedra giving rise to the [Mn(2)M(4)O(2)] core. The coordination sphere of each metal is completed by the bridging benzoate ligands and DMF molecules. The magnetic susceptibilities of 1-3 have been measured in the 1.8 K < T < 300 K temperature range. The magnetic susceptibilities for 1 and 2 pass through a broad maximum at low temperature which is characteristic of the diamagnetic ground state, while for 3 no maximum is detected down to 1.8 K. The magnetic data have been interpreted quantitatively for 1 and 3 on the basis of spin exchange interactions between the metallic centers (spin Hamiltonian for a pair being H(AB) = -J(AB) S(A).S(B)). Single-crystal measurements on [Mn(6)O(2)(PhCOO)(10)(CH(3)CN)(4)] (4) show that significant magnetic anisotropy develops at low temperature. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(23):2559-2566
A cadmium(II) coordination polymer [CdL(H2O)] (1) (H2L?=?3,3-bis(carboxymethyl)imidazo[1,2-a]pyridin-2-one) was synthesized under hydrothermal conditions and characterized by X-ray structure analysis. Compound 1 crystallizes in the monoclinic space group P21/n with a?=?11.945(2)?Å, b?=?8.0865(16)?Å, c?=?13.114(3)?Å, β?=?91.36(3)°, Z?=?4, and represents a 2D network with the 4*82 topology constructed from combination of metal centers with a T-shaped geometry and ligands with T-shaped structure simultaneously. Compound 1 also exhibits strong photoluminescence at room temperature. 相似文献
17.
Hua-Hong Zou Shu-Hua Zhang Ming-Hua Zeng Yan-Ling Zhou Hong Liang 《Journal of Molecular Structure》2008,885(1-3):50-55
A novel linear trimeric-based, Mn(II)–carboxylate chain well separated by long-linking flexible aliphatic tricarballylic acid ligands in a 3D coordination polymer [Mn3(C6H5O6)2(H2O)4]n (1, C6H5O6CH (COO−)(CH2COO−)2, TCA) exhibits low-dimensional antiferromagnetic order at 3.0 K. Such magnetic behavior is arises from the alternate Antiferro–Antiferro–Antiferro′ (J1 J1 J2) repeating interactions sequence, based on the nature of the binding modes of Mn(II)-carboxylate chain and the effect of interchains arrangement of 1. The reported carboxylate-bridged metal chain systems display a new structurally authenticated example of linear homometallic spin arranged antiferromagnet among metal carboxylates. 相似文献
18.
Yi Ma Yongke He Litian Zhang Xiaofang Wang Jingqun Gao Zhengbo Han 《Structural chemistry》2007,18(6):1005-1009
A new Cd(II) coordination polymer, [Cd(bpy)(oba)]
n
(1) (H2oba = 4,4′-oxybis(benzoic acid); bpy = 4,4′-bipyridine) has been synthesized under the hydrothermal conditions and structurally
characterized by elemental analysis, IR spectrum and single crystal X-ray diffraction. X-ray diffraction analysis reveals
that 1 features an interesting 3D framework with wavelike [Cd2(oba)2]
n
ribbons linked by 4,4′-bpy bridges. The oba ligand adopts chelating and chelating/bridging coordination modes. 1 displays strong fluorescent emission in the solid state at room temperature.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
19.
A new Cu(II) coordination polymer with singly deprotonated 2-propyl-imidazole-4,5-dicarboxylate (H3PIDC) as bridging ligand of formula [Cu(H2PIDC)2] n (I) was synthesized and characterized by IR, element analysis, and X-ray diffraction method. Compound I crystallizes in the monoclinic space group P21/n with cell parameters a = 8.332(1), b = 10.160(1), c = 11.228(1) Å, β = 91.13(1)°, V = 950.3(2) Å3, M r = 457.88, Z = 2, ρ c = 1.600 g/cm3, F(000) = 470, μ = 1.202 mm?1, R 1 = 0.0412, and wR 2 = 0.1064 for 2015 observed reflections. The Cu2+ ions are coordinated by four H2PIDC? ligands via N,O-chelating and O-bridging mode to form 2D layer planes, which are further linked by intermolecular hydrogen bonds and weak interactions into a 3D framework. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(15):2630-2642
A new cadmium(II) pyrazine-2-carboxylate coordination polymer, {[Cd(L)(H2O)2(SO4)0.5]2·H2O}n (1) (HL = pyrazine-2-carboxylic acid), has been synthesized by low-temperature solid-state reaction. Single-crystal X-ray analyses reveal that 1 possesses a 3-D framework structure. The polymer 1 was characterized by elemental analyses, thermogravimetric analyses, X-ray powder diffraction analyses, IR spectra, and UV–visible spectra. The third-order non-linear optical properties were also investigated and they exhibit nice non-linear absorption and self-defocusing performance with modulus of the hyperpolarizability (γ) 1.30 × 10?30 esu for 1 in a 2.01 × 10?4 M?dm?3 DMF solution. 相似文献