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1.
The reactions of Mn2+ ion with 4-nitrobenzene-1,2-bicarboxylic acid in the presence of bipyridyl-type coligands gave two new manganese(II) coordination polymers, [Mn2(Nbdc)2(Bipyp)(H2O)4] n (I) and [Mn2(Nbdc)2(Bipye)(H2O)4] n (II) (H2Nbdc = 4-nitrobenzene-1,2-bicarboxylic acid, Bipyp = 1,3-bi(4-pyridyl)propane, and Bipye = 1,2-bi(4-pyridyl)ethane). Both two complexes contain uniform carboxyl-bridged manganese chains with the composition of [Mn2(Nbdc)2(H2O)4] n , which are interlinked by interchain Bipyp/Bipye spacers to afford two closely-related layers (CIF files CCDC nos. 1008182 (I) and 1008183 (II)). Magnetic studies for two compounds show the presence of similar antiferromagnetic couplings between the adjacent Mn2+ ions through the carboxyl bridges, the best fittings to the experimental magnetic susceptibilities gave J =–0.20 cm–1 and g = 1.96 for I, and J =–0.24 cm–1 and g = 1.98 for II. Similar magnetic parameters and thermal behaviors further verify that two compounds possess closely-related structures.  相似文献   

2.
New hexanuclear Fe(III)–Mn(II, III) pivalates [Fe2 III Mn4 II(O)2(Piv)10(HPiv)4] (I) or [Fe4 III Mn2 III(O)2(Piv)12(CH2O2)(HPiv)2] · Et2O (II) are synthesized using the solid-state thermolysis of [Fe2Mn(O)(Piv)6(HPiv)3] (90°С). Complexes I and II differ by the ratio of iron and manganese ions, which depends on the atmospheric composition during thermolysis. The structures of compounds I and II are determined by X-ray diffraction studies. According to the parameters of the Mössbauer spectrum, complex I contains the Fe3+ ions in the high-spin state in the octahedral environment of oxygen atoms.  相似文献   

3.
Hydrothermal reaction of Co(II) salt with 1,4-di(1-imidazolyl)benzene (L1) and 4,4’-oxydiphthalic acid (H4OA) yields a new complex [Co3(HOA)2(L1)4(H2O)4] (I). [Ni(L2)2SO4] · 0.5H2O (II) can be obtained via the hydrothermal reaction of NiSO4 · 6H2O with 1,3-di(1H-imidazol-4-yl)benzene (L2). Complexes I and II have been characterized by single-crystal and powder X-ray diffraction (CIF files CCDC nos. 1019291 (I) and 1019292 (II)), IR, elemental, and thermogravimetric analyses. Complex I exhibits the uninodal six-connected 3D pcu framework structure of I with (412 · 63) topology; Complex II consists of the uninodal four-connected 2D sql (44 · 62) networks. In addition, magnetic property of I was investigated.  相似文献   

4.
Three new complexes based on 1-tetrazole-4-imidazole-benzene (Tibz), namely, [Cd(Tibz)2(H2O)2] n (I), [Mn(Tibz)2(H2O)4] · 2H2O (II) and [Co(Tibz)2(H2O)4] · 2H2O (III) have been synthesized through hydrothermal method and structurally characterized by element analyses, IR spectroscopy and single-crystal X-ray diffraction analyses (CIF files CCDC nos. 1443867 (I), 1443868 (II), 1443869 (III)). Single-crystal X-ray diffraction reveals that complex I is a 1D double-chain architecture, II and III are both mononuclear complexes. The results of single-crystal X-ray diffraction analyses indicate that the hydrogen bond and π··· π stacking exist in the complexes, which make great contribution to the stabilities of complexes IIII. The fluorescent properties of these complexes have also been studied in the solid state at room temperature.  相似文献   

5.
The coordination polymers (CPs) {[Cd(Pydc)(H2O)3] · PydcH2} (I) and [Mn(Pydc)(H2O)3] · PydcH2} (II) were obtained by the reaction of CdSO4 · 5H2O or MnCl2 · 4H2O with pyridine-2,6-dicarboxylic acid (PydcH2). The structures of the CPs I and II were characterized by IR, UV-Vis, TGA, and X-ray single crystal analysis (CIF files CCDC nos. 1417757 (I), 1417758 (II)). The network structures of I and II are constructed by an infinite number of discrete binuclear molecules and free PydcH2. The structures of the CPs I and II connected by the extensive H-bonds and π–π stacking, forming a 3D-network. The CPs I and II were screened to test their antimicrobial activities against different species of bacteria and fungi.  相似文献   

6.
A new macrocyclic oxamido-nickle(II) complex Na2NiL was synthesized. L denotes the doubly deprotonated forms of (13Z, 19Z)-16-methyl-6,7-dioxo-5,6,7,8-tetrahydrotriben-zo[b,f,l][1,4,8,11]tetraazacyclotetradecine- 13,20-dicarboxylate. Based on the complex ligand Ni(L2–), two heterometallic complexes [Ca2(NiL)2(H2O)8] · 10H2O (I) and [Co(NiL)2(H2O)2][Co(H2O)6] · 2.8H2O (II) were prepared. X-ray single crystal analyses (CCDC nos. 914618 (I), 914616 (II)) revealed that [Ca2(NiL)2(H2O)8] in I is a molecular box and the trinuclear complex anion [Co(NiL)2(H2O)2]2–in II is centrosymmetric. Thermogravimetric analyses showed that I exhibited moderately good stability and Co(II) catalyzed the thermal decomposition of II.  相似文献   

7.
Three two-dimensional coordination polymers [Cd(2,3-Pyma)Cl2] n (I), {[Cd(2,3-Pyma)(1,4-Chdc)] · 4H2O}n (II) and {[Zn2(2,3-Pyma)(1,2,4,5-Bttc)(H2O)4] · 6H2O} n (III) (2,3-Pyma = (2,3-pyridylmethyl) amine, H2-1,4-Chdc = 1,4-cyclohexanedicarboxylic acid, and H4-1,2,4,5-Bttc = 1,2,4,5-benzenetetracarboxylic acid) have been synthesized and structurally characterized by single crystal X-ray crystallography (CIF files CCDC nos. 989461 (I), 1055685 (II) and 1055686 (III)). Three complexes are all twodimensional layer networks bridged by the flexible 2,3-Pyma ligands or the carboxylate ligands. It is noted that the flexible 1,4-Chdc ligands bind the Cd2+ ions into a helical chain structure in complex II. The photoluminescence and thermal properties are investigated.  相似文献   

8.
Four new complexes, [Cu2(Bpca)2(L1)(H2O)2] · 3H2O (I), [Cu2(Bpca)2(L2)(H2O)2] (II), [Cu2(Bpca)2(L3)] · 2H2O (III), [Cu2(Bpca)2(L1)(H2O)] · 2H2O (IV) (Bpca = bis(2-pyridylcarbonyl)amido, H2L1 = glutaric acid, H2L2 = adipic acid, H2L3 = suberic acid, H2L4 = azelaic acid) have been synthesized and characterized by single-crystal X-ray diffraction methods (CIF files CCDC nos. 1432836 (I), 1432835 (II), 817411 (III), and 817412 (IV)), elemental analyses, IR spectra. Structural analyses reveal that compounds I, II, and IV have similar structures [Cu(Bpca)]+ units bridged by dicarboxylate forming dinuclear units, whereas the dinuclear of compound III are edge-shared through two carboxylate oxygen atoms of different suberate anions. Hydrogen bonds are response for the supramolecular assembly of compounds I to IV. The temperature-dependent magnetic property of III was also investigated in the temperature range of 2 to 300 K, and the magnetic behaviour suggests weak antiferromagnetic coupling exchange.  相似文献   

9.
Different-metal different-ligand complexes [{Co(Phen)3}2{Co(Phen)(H2O)4}2][{Ge(μ-OH)(μ- Hedp)}6Cl2] (I), [{Cu(Phen)2(H2O)}2(HPhen)2][Ge(μ-OH)(μ-Hedp)]6 · 20H2O (II) (H4Hedp = 1-hydroxyethylidenediphosphonic acid, Phen = 1,10-phenanthroline) were synthesized and studied by X-ray diffraction. According to X-ray diffraction data (CIF files CCDC nos. 1573112 (I), 1573113 (II)), compounds I and II are cation–anion type complexes in which the anions are represented by {[Ge(μ-OH)(μ-Hedp)]6}6– and, in the case of I, two additional Cl ions, while the cations are [Co(Phen)3]2+, [Co(Phen)(H2O)4]2+ in I and [Cu(Phen)2(H2O)]2+, HPhen+ in II. In the crystals of compounds I and II, the cations, anions, and water molecules are combined by numerous intermolecular hydrogen bonds, giving rise to a 3D network.  相似文献   

10.
Two complexes, namely, triaqua(18-crown-6)strontium dibromide monohydrate (I) and diaquabromo(18-crown-6)barium bromide (II), are synthesized. Their crystal structures are determined by X-ray diffraction analyses. For complex I, space group C2/c, a = 17.547 Å, b = 10.246 Å, c = 14.786 Å, β = 123.08°, Z = 4. For complex II, space group Pnma, a = 17.753 Å, b = 17.465 Å, c = 6.629 Å, Z = 4. The structures are solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.056 (I) and 0.042 (II) for 2696 (I) and 2440 (II) independent reflections (CAD-4 automated diffractometer, λMoK α radiation). Both complex cations—randomly disordered [Sr(18C6)(H2O)3]2+ in complex I and [BaBr(18C6)(H2O)2]+ in complex II—are of the host-guest type. The Sr2+ (Ba2+) cation resides in the cavity of the 18-crown-6 ligand and coordinated by all six O atoms. In the structures complexes I and II, the coordination polyhedra of the Sr2+ and Ba2+ cations (coordination number 9) can be described as distorted hexagonal bipyramids with one apex at the O atom of the water molecule in complex I or at the Br? ligand in complex II and the other split apex at the O atoms of two water molecules.  相似文献   

11.
Novel double complex salts, [Zn(DMF)6]2[SiW12O40] · 2H2O (I) and [Zn(H2O)2(DMF)4][Zn(DMF)6]2[PW12O40]2 · 6DMF (II) (DMF = N,N-dimethylformamide), were prepared by the reaction of Zn2+ and heteropoly acids Hx[EW12O40] · xH2O (E = P, X = 3, E = Si, X = 4) in DMF. Compounds I and II were studied by X-ray diffraction (СIF files CCDC nos. 1497570 (I) and 1497571 (II)) and IR spectroscopy.  相似文献   

12.
Two novel coordination polymers, namely {[Co(Ttac)0.5(1,4-Bib)(H2O)] · H2O}n (I) and {[La(HTtac)2(2H2O)] · H2O}n (II) (H4Ttac = 4,5-di(3'-carboxylphenyl)-phthalic acid, 1,4-Bib = 1,4-bis(1-imidazoly) benzene), have been designed and successfully prepared via hydrothermal process, and characterized by elemental analyses, IR spectroscopy, and single crystal X-ray diffraction (CIF files CCDC nos. 1039298 (I), 1039300 (II)). Structural analysis reveals that the H4Ttac ligands adopt different coordination modes in the as-synthesized I and II, and thus give rise to the targeted coordination polymers with different configurations. It is worth mentioning that, coordination polymer I is assembled from low-dimensional structures into three-dimensional (3D) via π···π stacking interactions, while three-dimensional coordination polymer II is formed by covalent bonds. Luminescent properties of coordination polymer II have been studied at ambient temperature. Significantly, luminescent measurement indicates that coordination polymer II may be acted as potential luminescent recognition sensors towards Cu2+ and Mn2+ ions.  相似文献   

13.
Complex salts [Rh(H2O)6]PO4 (I) and [Rh(H2O)6]PO4 · H2O (II) were obtained. Dehydration processes of compounds I and II were studied by thermogravimetry and differential scanning calorimetry. The heat effect for the loss of 0.82 ± 0.01 H2O (hydration) molecule was found to be 54 ± 1 kJ/mol, while that for the loss of coordinated H2O is 47 ± 1 kJ/mol (for I) and 43 ± 1 kJ/mol (for II). The solid phases of dehydration products were studied by X-ray powder diffraction, IR and 31P MAS NMR spectroscopy, and they were found to be polymers.  相似文献   

14.
Two new zinc(II) complexes with the formulas of [Zn(HTma)(Bpe)] (I) and [Zn1.5(Stp) (Bpe)(H2O)2] (II), where H3Tma = 1,2,4-trimellitic acid, Bpe = 1,2-bis(4-pyridyl)ethane, NaH2Stp = monosodium 2-sulfoterephthalate, have been prepared under hydrothermal conditions. Structural syntheses show complex I is a five-fold interpenetrated three-dimensional structure based on the diamond-like networks, however, complex II is a Bpe-pillared three-dimensional framework (CIF files CCDC nos. 1404475 (I) and 140447 (II)). Thermоgravimetric analyses show that complex I possesses high thermal stability up to 325°C and the dehydrated product of complex II also begins to decompose from 357°C. The luminescent properties of the two complexes are investigated in solid state.  相似文献   

15.
Complexes [CuL1Cl2] (I), [CuL2Cl2] · EtOH (II), and Cu2L3Cl4 (III) containing esters of the N-derivatives of optically active amino acids based on (+)-3-carene (L1, L2) and (?)-α-pinene (L3) are synthesized. The crystal and molecular structures of compounds I and II are determined by X-ray diffraction analyses (CIF files CCDC nos. 1560071 (I), 1560072 (II)). The crystal structure of compound I consists of mononuclear complex molecules. In the structure of compound II, the unit cell contains two crystallographically independent molecules of mononuclear complex [CuL2Cl2] and two EtOH molecules. Ligands L1 and L2 perform the tridentate-chelating function by the N atoms of the NH and NOH groups and by the O atom of the C=O group. In compounds I and II, the coordination polyhedra Cl2N2O of the Cu atoms are trigonal bipyramid. According to the data of IR and electronic spectroscopy, binuclear complex III has similar coordination polyhedra. The experimental values of μeff for compounds I, II, and III at 300 K are 1.93, 1.88, and 2.71 μB. For complex III, the μeff(T) dependence in a range of 2–300 K indicates a weak ferromagnetic exchange interaction.  相似文献   

16.
The reaction of [Co(Etm)3] · 3H2O (I) with sulfuric acid affords [Co(HEtm)3]2(SO4)3 · 4H2O (II). The change in the synthesis procedure (the direction interaction of cobalt(II) sulfate with β-aminoethanol (HEtm)) makes it possible to isolate [Co(HEtm)3](SO4)(HSO4) · H2O (III) and {[Co(HEtm)3][Co(Etm)3]}2(SO4)3 · 7.75H2O (IV). The X-ray diffraction analyses of compounds IIIV show that all of them are of the ionic type. In compounds II and III, the ionic structure consists of the [Co(HEtm)3]3+ cations and sulfate anions in a ratio of 2: 3 and 1: 2, respectively. The basic difference in compounds II and III is the different degrees of deprotonation of the acid residues. In complex II, two anions SO 4 2? are doubly deprotonated. In complex III, of the four anions found in the independent part of the unit cell of the sulfate anion two anions are monodeprotonated. In structure IV, two crystallographically independent complexes [Co(HEtm)3]3+ and [Co(Etm)3] are joined into a dimer through the O-H?O hydrogen bonding.  相似文献   

17.
Seven new cobalt(II) complexes based on the Schiff bases, 2,6-diacetylpyridine bis(isonicotinoylhydrazone) (H2L1) and 2,6-diacetylpyridine bis(nicotinoylhydrazone) (H2L2), are synthesized and studied by X-ray diffraction analysis: [Co(H2L1)(NCS)2] · 2.25H2O (I), [Co(H2L2)(NCS)2] · CH3OH (II), [Co(H2L2)(NCS)(H2O)]NCS (III), [Co(H4L1)(NCS)2](NO3)2 · 2H2O (IV), [Co(H4L1)(NCS)2][Co(NCS)4] · 0.75H2O (V), [Co(H4L2)(NCS)2][Co(NCS)4] · 1.75H2O (VI), and [Co(H2L2)(NCS)(CH3OH)]2[Co(NCS)4] · 2CH3OH (VII) (CIF files CCDC 941186 (I), 1457906 (Ia), 1457905 (II), 941187 (III), 1457907 (IV), 1457908 (V), 1457909 (VI), and 941188 (VII)). The organic ligands in the complexes act as pentadentate neutral H2L or doubly protonated (H4L)2+ coordinated through the same set of donor atoms N3O2. In all compounds IVII, the coordination polyhedron of the Co2+ ion in a complex with the Schiff bases has a shape of a pentagonal bipyramid. The hydrazones are arranged in the equatorial plane of the bipyramid. Its axial vertices are occupied by the nitrogen atoms of the NCS ̄ anions in compounds I, II, and IV–VI and by the nitrogen atoms of NCS ̄ and oxygen of the water molecule in compound III or methanol in compound VII. The NO 3 - anions or [Co(NCS)4]2 ̄ complex anions obtained by the reactions are involved along with the NCS ̄ anions in the formation of compounds IV–VII.  相似文献   

18.
Two Co(III) dioximates, cyanoguanidine complex {[Na2(µ-H2O)2(L1)2(H2O)2]-[CoIII(DmgH)2(N3)2]} n [CoIII(DmgH)2(N3)2] n (L1 = (H2N)2C=N–C=N) (I) and aminoguanidine complex [H3L2][Co(DmgH)2(N3)2] (H2L2 = H2N–C(=NH)–NH–NH2) (II), were synthesized from the [CoCl(DmgH)2(H2O)] structural unit (DmgH is the dimethylglyoxime monoanion). The implementation of the synthesis was confirmed by chemical analysis, IR spectroscopy, and X-ray diffraction (CIF files CCDC 1531845 (I), 1531846 (II)). Both compounds are ionic. Compound I consists of cations representing centrosymmetrical 2D coordination polymers, {[Na2(µ-H2O)2(L1)2(H2O)2][CoIII(DmgH)2(N3)2]} n+ n , and monomeric [Co(DmgH)2(N3)2] anions, while in II, the charge of the [Co(DmgH)2(N3)2] complex anion is counterbalanced by the organic [H3L2]+ cation. In I, L1 is coordinated to the metal as a monodentate neutral ligand, while in II, H2L2 occurs in the complex as a protonated uncoordinated component. Since L1 in I and H2L2 in II contain functional amine groups able to form intermolecular hydrogen bonds acting as proton donors, the component packing mode in the crystals was analyzed assuming various types of interactions, apart from electrostatic ones. The biological properties of the complexes were tested considering their effect on the biosynthesis of proteases by the micromycete Fusarium gibbosum CNMN FD 12 strain. Culturing the producer on a culture medium containing complex I in the selected optimal concentrations of 5–10 mg/L was found to increase the acid protease activity by 140–150%.  相似文献   

19.
A reaction between VOSO4, 2,6-diacetylpyridine, and nicotinohydrazide in a molar ratio of 1: 1: 2 afforded two complexes differing in both color and crystal shape as well as in chemical composition and molecular structure. The compositions and structures of the vanadium complexes were determined by IR spectroscopy and X-ray diffraction (CIF files CCDCnos. 1411235 (I) and 1411236 (II)). These complexes can be formulated as [V 2 II (H2L)2](NO3)4 ? H2O (I) and [VIV(=O)(H2L)(SO4)] ? 5H2O (II), where H2L is 2,6-diacetylpyridine bis(nicotinylhydrazone). Complex I consists of centrosymmetric dinuclear complex cations [V2(H2L)2]4+, NO 3 - anions, and crystal water molecules in a ratio of 1: 4: 1; complex II is built from molecular V(IV) complexes and crystal water molecules in a ratio of 1: 5. The coordination polyhedron of the metal atom in I is a tetragonal pyramid made up of the electron-donating atoms N3O2 of two ligands H2L. The coordination polyhedron of the metal atom in II is a pentagonal bipyramid made up of the electron-donating atoms N3O2 of one neutral five-coordinate ligand H2L and two O atoms coming from the oxo ligand and the SO 4 2- anion coordinated in a monodentate fashion.  相似文献   

20.
Two new copper(II) complexes with 1,3-bis(5-(pyridin-2-yl)-1,2,4-triazol-3-yl)propane (H2L), [Cu2(HL)Cl3] · H2O (I) and [Cu(H2L)](ClO4)2 (II), were described. The compounds were characterized by elemental analysis, IR spectroscopy, and magnetochemical data. According to X-ray diffraction data (CIF files CCDC nos. 1497511 (I), 1497512 (II)), complex I is binuclear and the metal cations are bound by the nitrogen atoms of the triazole ring and by the chloride anion. Complex II is mononuclear. Analysis of the temperature dependence of the magnetic susceptibility of I attests to the antiferromagnetic coupling of paramagnetic centers (–2J = 18 cm–1). Exchange channels are analyzed by means of density functional theory (B3LYP/6-311G(d)) using the broken symmetry approach.  相似文献   

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