共查询到20条相似文献,搜索用时 15 毫秒
1.
《Journal of Coordination Chemistry》2012,65(11):947-953
The trinuclear complex {[Cu(oxbe)(py)]2Ni(py)2}·2DMF has been prepared and characterized by elemental analysis, IR and electronic spectra and magnetic susceptibility, where H3oxbe is the dissymmetrical ligand N-benzoato-N′-(2-aminoethyl) oxamido, py?=?pyridine, DMF?=?dimethylformamide. The molecular structure of this complex is centrosymmetrical and has an extended oxamido-bridged structure consisting of two pyramidal copper(II) and one octahedral nickel(II) ions. The central Ni(II) and two terminal Cu(II) ions are antiferromagnetically coupled, J?=???60.2?cm?1. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(2):308-315
A 3-D metal-organic framework [Cd3(L)2(DMF)2]?·?2H2O?·?2DMF (1) (H3L?=?2-(dimethylcarbamoyl)biphenyl-5,2′,5′-tricarboxylic acid, DMF?=?N,N-dimethylformamide) with trinuclear Cd(II) units has been prepared. Complex 1 is a (3,?6)-connected (42?·?6)2(44?·?62?·?88?·?10) coordination net, which results from the solvothermal in situ formation of a new asymmetric ligand, 2-(dimethylcarbamoyl)biphenyl-5,2′,5′-tricarboxylic acid (H3L), through amidation of biphenyl-2,5,2′,5′-tetracarboxylic acid (H4bptc). Additionally, the luminescence of 1 has been investigated. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(24):4409-4418
A N-donor containing carboxylic ligand, 5-(pyridin-4-yl)isophthalic acid (H2L), was applied to construct two new coordination polymers [Cd(L)(DMF)] n (1, DMF?=?N,N-dimethylformamide) and {[Co(L)(H2O)2]?·?0.5CH3OH?·?1.5H2O} n (2) under different conditions. The complexes were characterized by IR, elemental, and thermogravimetric analyses, powder and single crystal X-ray diffraction. In 1 each L2? links four CdII to form a 3-D framework, while in 2 each L2? connects three metals to form a 2-D layer structure, which is further connected together by hydrogen bonds to form a 3-D architecture. The thermal stability of the complexes and the photoluminescence of 1 were investigated. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(7):763-769
A novel dinuclear nickel(II) complex Ni2(NO3)4(APTY)4 (1) (APTY?=?1,5-dimethyl-2-phenyl-4-{[(1E)-pyridine-4-ylmethylene]amino}-1,2-dihydro-3H-pyrazol-3-one), was synthesized by solvothermal reaction of Ni(NO3)2?·?6H2O with APTY in methanol at 353?K. The structure consists of centrosymmetric dimers resulting from octahedrally coordinated Ni atoms bridged by APTY ligands. Weak intermolecular interactions (C–H?···?N, C–H?···?O hydrogen bonding, C–H?···?π and π–π stacking interactions) are responsible for a supramolecular assembly of molecules in the lattice. Magnetic measurements over 1.8–300?K show weak antiferromagnetic coupling between Ni(II) ions with J?=?2.969?cm?1, g?=?2.280, θ?=??5.903. 相似文献
5.
Yan‐Hong Zhang Gui‐Ru Deng Qing‐Lun Wang Rui‐Hong Zhang Fan Yang Guang‐Ming Yang Prof. Dai‐Zheng Liao 《无机化学与普通化学杂志》2009,635(8):1254-1258
Two new oxamido‐bridged N4 macrocyclic complexes [(CuL)2Mn(C2H5OH)2](ClO4)2 · 2C2H5OH ( 1 ) and [(CuL)2Co‐(C2H5OH)2](ClO4)2 · 2C2H5OH ( 2 ) (H2L = 2,3‐dioxo‐5,6:14,15‐di‐benzo‐7,13‐diphenyl‐1,4,8,12‐tetraazacyclo‐pentadeca‐7,13‐diene) have been synthesized and structurally characterized by X‐ray crystallographic investigations. In the two complexes, all copper(II) ions adopt a slightly distorted square‐planar configuration and the central manganese(II) and cobalt(II) ions are set in a distorted octahedral coordination sphere, connected to the other CuL fragments through exo‐cis oxamido bridges. The analyses of the magnetic properties were carried out by means of the theoretical expression of the magnetic susceptibility deduced from the spin Hamiltonian ? = –2J?1?2, leading to J = –14.58 cm–1 for complex 1 and J = –26.95 cm–1 for complex 2 , respectively. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(10):1829-1836
{[Zn2(tdba)2(phen)2(H2O)2]?·?2H2O?·?2DMF} n (1) and [Zn(tdba)(bpy)] n (2) (H2tdba?=?2,2′-thiodibenzoic acid, phen?=?1,10-phenanthroline, bpy?=?2,2′-bipyridine, DMF?=?dimethylformamide) were hydrothermally synthesized, and characterized by single-crystal X-ray diffraction analysis, FT-IR, and elemental analysis. The obtained complexes exhibit different structures. Compound 1 is 0-D with tdba connecting two Zn ions in a μ 1–η 1/μ 1–η 1 coordination forming a dinuclear molecule. Each molecule is further connected with neighbors via hydrogen-bonding and π?···?π interactions. Compound 2 displays a 1-D structure in which Zn2+ centers are connected via tdba anions into 1-D chains propagating along the a-axis; these chains are further packed via π?···?π interactions. In addition, photoluminescence for 1 and 2 has been investigated. 相似文献
7.
《Journal of Coordination Chemistry》2012,65(24):4419-4429
Two metal complexes, [NiII(mscinn)2(pda)2] (1) and [CdII(mscinn)2(dmeda)2·2H2O] (2) (mscinn?=?4-methylsulfonyl cinnamate, pda?=?propane-1,3-diamine, dmeda?=?N′,N′-dimethylethane-1,2-diamine), were synthesized by reacting 4-methylsulfonyl cinnamate with the diamines and metal salts. Their structures were determined by single-crystal X-ray diffraction analysis. Crystal parameters of 1: C26H38N4NiO8S2, M?=?657.43, monoclinic, P21/c, a?=?16.6123(8)?Å, b?=?8.5956(4)?Å, c?=?11.2047(5)?Å, β?=?107.423(1)°, V?=?1526.54(12)?Å3, Z?=?2, D calcd?=?1.430?g?cm?3, F(000)?=?692, μ?=?0.825?mm?1, R 1?=?0.0257, wR 2?=?0.0669. Crystal data of 2: C28H42CdN4O8S2?·?2(H2O), M?=?775.24, monoclinic, P21/c, a?=?9.8278(4)?Å, b?=?11.6611(5)?Å, c?=?15.3972(7)?Å, β?=?96.195(1)°, V?=?1754.26(13)?Å3, Z?=?2, D calcd?=?1.468?g?cm?3, F(000)?=?804, μ?=?0.798?mm?1, R 1?=?0.0299, wR 2?=?0.0770. Antimicrobial activities for 1 and 2 against Escherichia coli, Pseudomonas putida, Bacillus subtilis, and Bacillus cereus had better antibacterial activity than their parent carboxylic acid against Gram-positive bacteria (B. subtilis and B. cereus). The cadmium complex of the cinnamate displayed high inhibitory activity with an MIC value of 5?µg?mL?1 against P. putida, while the nickel complex also exhibited good inhibitory potency with an MIC value of 5?µg?mL?1 against B. subtilis. 相似文献
8.
《Journal of Coordination Chemistry》2012,65(3):505-514
Reaction of Co(OAc)2 · 4H2O with N-(2-hydroxybenzyl)salicylaldimine (H2La) in dimethylformamide (DMF)–H2O yields a linear trinuclear mixed valence complex [CoIII(μ-La)(μ-Lb)(μ-OAc)]2CoII · 2DMF (1). Here, HLb is salicylaldimine, which is afforded by an in situ transformation of H2La via cleavage of the C–N bond. Complex 1 has been characterized by X-ray crystallography as well as elemental analysis, UV-Vis, and IR spectroscopy. The cathodic and anodic responses of 1 in DMF appeared at ?1.46 V (CoIII → CoII, quasi-irreversible) and +0.99 V (CoII → CoIII, irreversible) versus saturated calomel electrode, respectively. The magnetic behavior of 1 has been analyzed by the one-ion approximation with spin–orbit coupling in Oh symmetry giving λ = ?121 cm?1. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(15):2618-2630
In the presence of nickel acetate, a chiral ligand, (S)-Hdphp ((S)-N-[di(2-pyridyl)-hydroxy-methyl]-proline), was synthesized in situ by nucleophilic addition of L-proline to di-2-pyridyl ketone. Based on this ligand, three chiral mononuclear complexes, {Ni[(S)-dphp](DMF)(H2O)}(ClO4) (1), {Ni[(S)-dphp](H2O)2}(ClO4)(H2O)1.5 (2), and {Ni[(S)-dphp](SCN)(H2O)} (3), have been obtained and characterized by single-crystal X-ray diffraction, elemental analyses, and infrared spectra. By virtue of charge-assisted O–H?···?O hydrogen-bonding interactions, all the complexes possess double chain structures. The double chains were connected into 2-D networks via π?···?π stacking and CH?···?π interactions in 1. For 2, O–H?···?O hydrogen-bonding interactions between free water molecules and other oxygens as well as π?···?π stacking and CH?···?π interactions extend the chains into a 3-D network. Complex 3 exhibits 3-D structure via O–H?···?S interactions. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(5):893-901
Two coordination complexes, [Co2L2(4,4′-bpy)2(H2O)4]?·?6H2O (1) and [CoL(4,4′-bpy)] (2) (H2L?=?4,6-bis(4-methylbenzoyl)isophthalic acid and 4,4′-bpy?=?4,4′-bipyridine), have been synthesized with the same starting materials under conventional and hydrothermal condition, respectively. Their structures have been characterized by X-ray diffraction, elemental analysis, IR spectra, and thermogravimetric analysis. Complex 1 features a 2-D sheet structure (space group C2/c) with (4,4) grid units. The non-covalent interactions (O–H?·?·?·?O, C–H?·?·?·?π, and weak π??·?·?·?π interactions) extend 1 into a 3-D supramolecular network. Complex 2 displays a (3,5)-connected network (space group P 1) with a (42?·?6)(42?·?68) topology. 相似文献
11.
《Journal of Coordination Chemistry》2012,65(8):1456-1468
Weak anti-ferromagnetic coupling is observed in a mononuclear copper(II) complex, [Cu(Pid)(OSO3)(H2O)]?·?(H2O) (Pid?=?2,2′-(1,10-phenanthrolin-2-ylimino)diethanol). The Cu(II) complex is a distorted square pyramid. Analysis of the crystal structure indicates that there are two types of magnetic coupling pathways, where one pathway involves π–π stacking between adjacent complexes and the second one involves the O–H?···?O hydrogen bonds between adjacent complexes. The variable-temperature magnetic susceptibilities show that there is a weak anti-ferromagnetic coupling between adjacent Cu(II) ions with Curie–Weiss constant θ?=??13.71?K?=??9.93?cm?1. Theoretical calculations reveal that the π–π stacking resulted in anti-ferromagnetic coupling with 2J?=??6.30?cm?1, and the O–H?···?O hydrogen-bonding pathway led to a weaker anti-ferromagnetic interaction with 2J?=??3.38?cm?1. The theoretical calculations also indicate that anti-ferromagnetic coupling sign from the π–π stacking accords with the McConnell I spin-polarization mechanism. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(9):1584-1595
Three coordination polymers of Robson-type macrocycles, {[Cu4L1(4,4′-bipy)2]·4ClO4·H2O}∞ (1), {[Cu4L2(4,4′-bipy)4]·2CH3CN·4ClO4·2H2O}∞ (2), and {[Zn2L2(4,4′-bipy)2]·(ClO4)2}∞ (3) (where H2L1 and H2L2 are the [2?+?2] condensation products of 1,3-diaminopropane with 2,6-diformyl-4-methylphenol and 2,6-diformyl-4-fluorophenol, respectively), have been synthesized and characterized. Magnetic susceptibility was measured for 1 and 2 from 2 to 300?K. The optimized magnetic data were J?=?–368.5?cm?1, J′?=?40.5?cm?1 with R?=?1.69?×?10?6 for 1 and J?=?–291.22?cm?1, J′?=?83.74?cm?1, ρ = 0.00168 with R?=?1.8?×?10?11 for 2, respectively. The data reveal strong antiferromagnetic interactions between two Cu(II) ions in the macrocyclic unit and ferromagnetic interaction between the Cu(II) ions in two adjacent macrocyclic units for 1 and 2. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(24):4315-4326
Two coordination polymers, {[Zn(NiL)(DMA)(H2O)2] (DMA)(H2O)} n (1) (DMA?=?N,N-dimethylacetamide) and {[Zn2(NiL)2(DMF)(H2O)4]?·?3DMF} n (2) (DMF?=?N,N-dimethylformamide), have been prepared by reactions of Zn(NO3)2?·?6H2O and NiL in CH2Cl2-DMA–H2O and CH2Cl2-DMF–H2O, respectively. H2L denotes dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-9,10-benzo-[1,4,8,11]tetraazacyclotetradecine-13,18-dicarboxylate. Single-crystal X-ray diffraction analyses reveal that coordination geometries around Ni(II) are identical with slightly distorted square planar and all Ni–N bonds are very short. Complex 1 shows 1-D zigzag chain structure, while 2 has 1-D double-zigzag chains. The chains, which are packed parallel in 1 and 2, are interconnected by lattice solvent through O–H···O and C–H···O hydrogen bonds to form 3-D supramolecular networks. We discuss solvent effects on assembly of the two coordination polymers. The results reveal that coordinated solvent has influence on the assembly procedure. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(24):4132-4147
AbstractA new binuclear complex, [Zn2L2Cl4]·2H2O {L?=?N-aldehyde-N-(4-(benzyloxy)benzyl)-1,4,7triazacyclononane}, was synthesized and characterized by X-ray, elemental analysis, infrared and electronic spectroscopy, and mass spectrometry. The central ion is bridged by the L and lies in a tetrahedral configuration with Zn···Zn distance of 6.283 Å. The complex crystallizes in the triclinic space group Pī. ESI-MS of the complex indicates that the protonated ligand HL+ is the active species. The interaction of HL+ with calf thymus–DNA (CT–DNA) and bovine serum albumin (BSA) was studied by means of various spectroscopic methods, which revealed that HL+ could interact with CT–DNA through groove-binding mode and could quench the intrinsic fluorescence of BSA in a static quenching process. DNA–cleavage experiments indicate that HL+ exhibits efficient DNA–cleavage activity in the presence of H2O2, hydroxyl radical (HO?) may serve as the major cleavage active species, and the pseudo-Michaelis–Menten kinetic parameters (Kcat, KM, Vmax); 2.47?h?1, 2.70?×?10?4 M and 6.68?×?10?4 Mh?1. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(11):1931-1939
Two heterometallic coordination complexes, {[Cu(aeop)Zn(H2O)3]2?·?3H2O} n (1) and [Cu(aeop)Ni(H2O)4]?·?4H2O (2) (H4aeop?=?N-(2-aminoterephthalic acid)-N′-(1,3-propanediamine)oxamidate), have been synthesized and characterized by elemental analyses, IR, UV spectroscopy, thermogravimetric analysis, and X-ray crystal diffraction. Complex 1 features a 1-D chain constructed from neutral tetranuclear units. Complex 2 is a neutral binuclear complex. Through intermolecular hydrogen-bonding interactions, 2 gives a 3-D network structure. The variable temperature magnetic susceptibility measurements (2–300?K) of 2 show a pronounced antiferromagnetic interaction between the copper(II) and nickel(II), and the exchange integral J is equal to ?42.7?cm?1. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(22):3897-3906
The (enH2)[GdIII 2(pdta)2(H2O)2]?·?8H2O (1) (en?=?ethylenediamine and H4pdta?=?propylenediamine-N,?N,?N′,?N′-tetraacetic acid) and (enH2)[GdIII(egta)(H2O)]2?·?6H2O (2) (H4egta?=?ethyleneglycol-bis-(2-aminoethylether)-N,?N,?N′,?N′-tetraacetic acid) complexes were synthesized and characterized by infrared spectrum, thermal analysis, and single-crystal X-ray diffraction. The complex (enH2)[GdIII 2(pdta)2(H2O)2]?·?8H2O has a binuclear eight-coordinate structure with pseudo square antiprism and crystallizes in the monoclinic crystal system with C2/c space group. Through a carboxylate bridge, an infinite 1-D zigzag polymeric binuclear [GdIII 2(pdta)2(H2O)2]2? complex anion is formed. All infinite zigzag polymeric complex anions link through hydrogen bonds, yielding a layer structure. (enH2)[GdIII(egta)(H2O)]2?·?6H2O has a mononuclear nine-coordinate structure with pseudo monocapped square antiprism and crystallizes in the monoclinic crystal system with P21/n space group. Each enH2 2+ cation, through hydrogen bonds, connects two adjacent [GdIII(egta)(H2O)]? complex anions. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(20):3546-3555
Two U(VI)-containing coordination polymers, (UO2)2O2(Suc)(2,2′-bipy)2 (1) and UO2(BC)2(DMF) (2) (2,2′-bipy?=?2,2′-bipyridine, H2Suc?=?succinic acid, HBC?=?benzoic acid, DMF?=?N,N-dimethylformamide), have been synthesized and characterized via elemental analysis, infrared spectroscopy, UV-Vis spectroscopy, and single-crystal X-ray diffraction. Structural analyses show that 1 is a 1-D chain coordination polymer in which U(VI) ions are connected by succinic acid ligand and the 1-D chain is connected into a 3-D supramolecular network by C?H···O hydrogen bonds between carbon of 2,2′-bipyridine and uranyl oxygen. For 2, monomeric entities are further assembled into a 1-D supramolecular network by C–H···O hydrogen bonds between carbon of DMF molecule and coordinated carboxylate oxygen. Thermogravimetric analyses and photoluminescent properties of 1 and 2 are discussed. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(22):3871-3879
The syntheses and crystal structures of the closely related but non-isostructural Cd2(C19H21N3O3F)4(H2O)2?·?4H2O (1) and Pb2(C19H21N3O3F)4?·?4H2O (2) are described, where C19H21N3O3F? is enrofloxacinate (enro). Both compounds contain centrosymmetric, binuclear, neutral complexes incorporating a central diamond-shaped M2O2 (M?=?Cd, Pb) structural unit. The Cd2+ coordination polyhedron in 1 is a CdO6 trigonal prism, including one coordinated water. The Pb2+ coordination polyhedron in 2 can be described as a very distorted square-based PbO5 pyramid, although two additional short Pb?···?O (<3.1?Å) contacts are also present. In the crystal of the cadmium complex, O–H?···?O hydrogen bonds lead to a layered structure. In the lead compound, O–H?···?O and O–H?···?N interactions lead to chains in the crystal. Crystal data: 1: C76H96Cd2F4N12O18, M r?=?1766.45, triclinic, P 1, a?=?12.185(2)?Å, b?=?12.306(3)?Å, c?=?14.826(3)?Å, α?=?68.15(3)°, β?=?70.28(3)°, γ?=?86.11(3)°, V?=?1938.2(7)?Å3, Z?=?1, T?=?298 K, R(F)?=?0.030, wR(F 2)?=?0.079. 2: C76H88F4N12O16Pb2, M r?=?1920.00, triclinic, P 1, a?=?12.0283(4)?Å, b?=?12.7465(4)?Å, c?=?13.0585(4)?Å, α?=?83.751(1)°, β?=?74.635(1)°, γ?=?81.502(1)°, V?=?1904.3(1)?Å3, Z?=?1, T?=?298?K, R(F)?=?0.021, wR(F 2)?=?0.049. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(12):1303-1315
The reaction of α-[SiMo12O40]4? with trivalent cations Ln3+ and N-methyl-2-pyrrolidone leads to a series of complexes of formula [Ln(NMP)4(H2O) n ]H[SiMo12O40]?·?2NMP?·?mH2O [where Ln?=?La (1), Pr (2), Nd (3), Sm (4), Gd (5), n?=?4, Ln?=?Dy (6), Er (7), n?=?3. NMP?=?N-methyl-2-pyrrolidone]. The syntheses, X-ray crystal structures, IR, and ESR spectra and thermal properties of the complexes 1, 2, 4, 6, 7 have been reported previously. Here, we report X-ray crystal structures, IR, UV, ESR spectra and thermal properties of the complexes [Nd(NMP)4(H2O)4]H[SiMo12O40]?·?2NMP?·?1.5H2O (3), and [Gd(NMP)4(H2O)4]H[SiMo12O40]?·?2NMP?·?H2O (5). In addition, the electrochemical behaviour of this series of complexes in aqueous solution and aqueous-organic solution has been investigated and systematic comparisons have been made. All these complexes exhibit successive reduction process of the Mo atoms. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(19):3458-3468
Two organic–inorganic compounds based on Keggin building blocks have been synthesized by hydrothermal methods, (C7N2H7)3(C7N2H6)?·?PMo12O40?·?2H2O (1) and (C7N2H7)3(C7N2H6)2?·?AsMo12O40?·?3H2O (2) (C7N2H6?=?benzimidazole). Single-crystal X-ray analysis revealed that 1 crystallized in the triclinic system, P-1 space group with a?=?9.8980(4)?Å, b?=?11.2893(4)?Å, c?=?25.8933(9)?Å, α?=?93.307(2)°, β?=?90.630(2)°, γ?=?108.330(2)°, V?=?2740.68(18)?Å3, Z?=?2, R 1(F)?=?0.0740, ωR 2(F 2)?=?0.1511, and S?=?1.037; 2 crystallized in the triclinic system, P-1 space group with a?=?12.3353(4)?Å, b?=?13.2649(4)?Å, c?=?20.2878(6)?Å, α?=?95.6630(10)°, β?=?100.1720(10)°, γ?=?99.3940(10)°, V?=?3195.72(17)?Å3, Z?=?2, R 1(F)?= 0.0329, ωR2 (F 2)?=?0.1236, and S?=?1.088. The two compounds show a layer framework constructed from Keggin-polyoxoanion clusters and benzimidazole via hydrogen bonds and π–π stacking interactions, resulting in a 3-D supramolecular network. Both have high catalytic activity for oxidation of methanol. When the initial concentration of the methanol is 5.37?g?m?3 in air and the flow velocity is 4.51?mL?min?1, methanol is completely eliminated at 150°C for 1 (160°C for 2). 相似文献