共查询到20条相似文献,搜索用时 15 毫秒
1.
Cui Shuxin Zhu Baili Zhang Xiaoying Xiang Shuanglong He Pengzhen Yin Qianzhu Zuo Minghui Xu Bo 《Transition Metal Chemistry》2021,46(5):345-351
Transition Metal Chemistry - Two complexes [Fe(1,10-phen)2Ni(CN)4]n (1), {[Fe2(1,10-phen)4(CN)4Co2(1,10-phen)2Fe(CN)6]·2H2O}n (2) were prepared in the reaction of K3[Fe(CN)6] as cyanometalate... 相似文献
2.
使用Dy(NO3)3·6H2O与席夫碱配体2-(((2-羟基-3-甲氧基苄基)亚氨基)甲基)-4-甲氧基苯酚(H2L)和2个辅助配体PhCO2H和2-NO2-PhCO2H在乙醇中反应,得到2例Dy4配合物[Dy4(L)4(PhCO2)2(NO3)2(EtOH)2](1)和[Dy4(L)4(2-NO2-PhCO2)2(NO3)2(EtOH)2](2)。单晶X射线衍射解析表明配合物1和2均由Dy2基本单元构建,形成中心对称的四核线性链状结构。配合物1和2中Dy2单元中的一个Dy(Ⅲ)离子呈现七配位几何构型,另一个Dy(Ⅲ)离子呈现八配位几何构型。2例配合物均为单分子磁体,其能垒分别为110和108 K。通过理论计算对1和2的磁性能进行了分析。 相似文献
3.
使用Dy (NO3)3·6H2O与席夫碱配体2-(((2-羟基-3-甲氧基苄基)亚氨基)甲基)-4-甲氧基苯酚(H2L)和2个辅助配体PhCO2H和2-NO2-PhCO2H在乙醇中反应,得到2例Dy4配合物[Dy4(L)4(PhCO2)2(NO3)2(EtOH)2](1)和[Dy4(L)4(2-NO2-PhCO2)2(NO3)2(EtOH)2](2)。单晶X射线衍射解析表明配合物1和2均由Dy2基本单元构建,形成中心对称的四核线性链状结构。配合物1和2中Dy2单元中的一个Dy (Ⅲ)离子呈现七配位几何构型,另一个Dy (Ⅲ)离子呈现八配位几何构型。2例配合物均为单分子磁体,其能垒分别为110和108 K。通过理论计算对1和2的磁性能进行了分析。 相似文献
4.
Two new Mn(II) complexes, trans-[Mn(L1-L2)2(NCS)2] (1–2) with triaryltriazole (1, L1 = 3-(p-bromophenyl)-4-phenyl-5-(2-pyridyl)-1,2,4-triazole; 2, L2 = 3,4-bis(p-methylphenyl)-5-(2-pyridyl)-1,2,4-triazole), have been synthesized and structurally characterized by elemental analysis, FT-IR, ESI-MS, and single-crystal X-ray crystallography. Crystallographic studies revealed that both 1 and 2 contain a distorted octahedral [MnN6] core with two trans-disposed NCS? ions. The L1 ligand, 1 and 2, together with four known homologous Mn(II) complexes, trans-[Mn(L3-L6)2(NCS)2] (3–6) (3, L3 = 3-(p-methoxyphenyl)-4-(p-chlorophenyl)-5-(2-pyridyl)-1,2,4-triazole; 4, L4 = 3-(p-methoxyphenyl)-4-(p-bromophenyl)-5-(2-pyridyl)-1,2,4-triazole; 5, L5 = 3-(p-chlorophenyl)-4-(p-methylphenyl)-5-(2-pyridyl)-1,2,4-triazole; 6, L6 = 3,5-bis(2-pyridyl)-4-(p-methylphenyl)-1,2,4-triazole), were tested in vitro for their antibacterial activities against two Gram-positive bacterial strains and two Gram-negative bacterial strains by the MTT method. The results indicate that 1 exhibited better activity than Penicillin and Kanamycin against Pseudomonas aeruginosa and also better than its free L1 ligand. 相似文献
5.
Two new lanthanide-radical complexes [Ln(Hfac)3(NIT-4PhAllO)2](Ln(III) = Gd (I), Tb (II); Hfac = hexafluoroacetylacetonate; NIT-4PhAllO = 4′-allyloxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been prepared and characterized in structurally as well as magnetically. Single crystal X-ray diffraction analyses reveal that two complexes are isostructural with mononuclear tri-spin structure, in which the metal ions are eight-coordinated in distorted dodecahedron geometry. The nitronyl nitroxide radicals act as monodentate ligands towards Ln(Hfac)3 unit through the oxygen atom of the nitronyl nitroxide group. Magnetic studies reveal that the Gd-coordinated nitroxide interaction is ferromagnetic. 相似文献
6.
7.
Susanta HazraSuraj Mondal Michel FleckSujit Sasmal E. Carolina Sañudo Sasankasekhar Mohanta 《Polyhedron》2011,30(11):1906-1913
The work in this paper reports syntheses, molecular and supramolecular structures, electrochemistry and magnetic properties of two diphenoxo-bridged dinickel(II) compounds [NiII2L(N3)2(H2O)2]·CH3CN (1) and [NiII2L(N3)2(H2O)] (2), where H2L is the tetraimino diphenolate macrocyclic ligand, obtained on [2 + 2] condensation of 4-methyl-2,6-diformylphenol and 2,2′-dimethyl-1,3-diaminopropane. Brown colored compound 1 and green colored compound 2 are produced from the same reaction mixture as a function of temperature; 1 is formed from the reaction mixture in acetonitrile at low temperature (ca. 5 °C), while 2 is formed on heating the reaction mixture in acetonitrile. Crystals of compounds 1 and 2 are monoclinic (space group P21/c) and orthorhombic (space group P212121), respectively. Analyses of the crystal packing of the crystalline phases reveal that two-dimensional topologies are resulted in both 1 and 2 due to hydrogen bonding interactions. Variable-temperature (2-300 K) magnetic susceptibility measurements of the two compounds reveal that the metal centers in both the complexes are coupled by moderate antiferromagnetic interactions with J values (H = -2JS1·S2) −18.8 and −34.2 cm−1 for 1 and 2, respectively. Electrochemical analyses of 2 reveal that this compound exhibits two-step reduction couples at E½ = −977 and −1155 mV. 相似文献
8.
Yun Yang Li Zhang Lang Liu Guangfei Liu Jixi Guo Dianzeng Jia 《Structural chemistry》2007,18(6):909-915
Three new manganese complexes, [Mn(PPeAP-INH)(CH3OH)2]n(CHCl3) (1) [PPeAP-INH=N-(1-phenyl-3-phenylethyl-4-ethylene-5-pyrazolone isoniazid, INH = isoniazid], [Mn2(PM4MbP-INH)2(CH3OH)4](CH3OH) (2·CH3OH), [PM4MbP-INH=N-(1-phenyl-3-methyl-4-(p-methylbenzoylene)-5-pyrazolone) isoniazid)] and [Mn2(PPePeP-INH)2(CH3OH)4] (3) [PPePeP-INH=N-(1-phenyl-3-phenylethyl-4-phenylethylene-5-pyrazolone) isoniazid] have been prepared, aiming at the formation
of extended coordination polymer with Mn(II) ions. Formation of the corresponding manganese-ligand complexes has been monitored
and characterized by chemical and spectroscopic techniques. X-ray diffraction analyses of available single crystals revealed
1D polymeric patterns of supramolecular system. Among them, the dimers of 2 and 3, bridged by two methanol molecules, are extended by hydrogen bond of O–H···N to form the 1D chain. In these three new complexes
which are all octahedral coordination environments, the N(5) atom of the pyridine heterocycles plays a very important role
in building the bridged polymeric chain. 相似文献
9.
Transition Metal Chemistry - Two trinuclear oxo-centered iron(III) complexes [Fe3(μ3-O)Salox(L1)5(MeOH)2] (1) and [Fe3(μ3-O)Salox(L1)5(EtOH)2]·2EtOH·2H2O (2)... 相似文献
10.
《Journal of Coordination Chemistry》2012,65(17):3102-3109
Two new linear trinuclear complexes, [Co(NiL1)2(SCN)2] (1) and [Co(NiL2)2(H2O)2](ClO4)2?·?2C2H5OH (2), have been prepared by using Co(ClO4)2?·?6H2O and two macrocyclic complex ligands NiL1 and NiL2. L1 and L2 are the doubly deprotonated forms of dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo[1,4,8,11]tetraazabicyclo[12.4.015,16]13,18-dicarboxylate and dimethyl 5,6,7,8,15,16-hexahydro-15-methyl-6,7-dioxodibenzo[1,4,8,11]tetraazacyclotetradecine-13,18-dicarboxylate, respectively. X-ray single crystal analyses reveal the coordination geometries around Ni(II) in both 1 and 2 are identical and slightly distorted square planar with N4 donors; all Ni–N bonds in the two complexes are very short. The Co(II) ions are at the centers of the trinuclear complexes and have distorted octahedral coordination geometries of O4N2 donors in 1 and an O6 in 2. π?···?π interactions involving aromatic and non-aromatic π-systems join the trinuclear entities to form 2-D layers in the crystals of 1 and 2. 相似文献
11.
Chen-I Yang Kai-Hung Cheng Motohiro Nakano Gene-Hsiang Lee Hui-Lien Tsai 《Polyhedron》2009,28(9-10):1842-1851
The reaction of salicylaldoxime (H2salox) with Mn(ClO4)2 · 6H2O, NaN(CN)2 and NEt3 in MeOH affords a MnIII6 hexanuclear complex of [Mn6O2(salox)6(MeOH)6(NCNCONH2)2] (1), while reaction of H2salox with MnCl2 · 4H2O and NEt4OH in EtOH affords a MnIII6 hexanuclear complex of [Mn6O2(salox)6(EtOH)4(H2O)2Cl2] (2). Both complexes 1 and 2 contain a [MnIII6(μ3-O)2]14+ core, which is a known structural type in the family of Mn6 complexes. Variable temperature magnetic susceptibilities and magnetization measurement of complexes 1 and 2 have been carried out. Exchange interactions of metal centers for complexes 1 and 2 are fitted by a full diagonalization matrix method. The fitting results indicate that both complexes 1 and 2 have the ground-state spin value of S = 4, and the ground state of complex 1 has the much closer energy to low-lying spin states than that of complex 2. Magnetization measurements at 2.0–4.0 K and 10–70 kG confirm that the ground state is S = 4, with significant magnetoanisotropy as gauged by the D value of ?0.82 cm?1 and ?1.18 cm?1, for 1 and 2, respectively. The frequency dependence of the out-of-phase component in alternating current magnetic susceptibilities for both complexes 1 and 2 indicates the slow magnetic relaxation of superparamagnetic behaviour with a Ueff of 27.0(1) K and τ0 = 3.8(2) × 10?9 s for complex 1, and Ueff of 25.1(6) K and τ0 = 4.6(1) × 10?8 s for complex 2. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(17):1481-1488
Two lead complexes [Pb(2,2′-bipy)2(H2O)2(tcm)]2·(tcm)2·2H2O, 1, and [Pb(phen)2(tcm)2], 2, have been prepared by reacting Pb(NO3)2, potassium tricyanomethanide (Ktcm) and 2,2-bipyridine or 10-phenanthroline, respectively. X-ray crystallography studies show that 1 is a dimer formed by two eight-coordinate [Pb(bipy)2(H2O)2] units bridged by tricyanomethanide while 2 is a mononuclear six-coordinate compound with the lead atom surrounded by two phen ligands and two tricyanomethanide ions. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(9):1538-1545
Two new 1-D manganese(III) Schiff-base complexes bridged by dicyanamide (dca), [Mn(III)(5-Brsalen)(dca)] ? CH3OH (1) and [Mn(III)(3,5-Brsalen)(dca)] · CH3OH · CH3CN (2) (5-Brsalen = N,N′-ethylenebis(5-bromo salicylaldiminato) dianion; 3,5-Brsalen = N,N′-ethylenebis(3,5-dibromosalicylal diminato) dianion), have been synthesized and characterized. X-ray diffraction analyses reveal that the two complexes have 1-D chain structures constructed by μ 1,5-dca bridge. Magnetic susceptibility measurements exhibit weak antiferromagnetic exchange coupling in the complexes. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(1):56-66
[Cd2(C7H3NO5)2 · 4(H2O)] n · 3nH2O · 0.5n(CH3OH) (1) and [Cd3(C7H2NO5)2 · 10(H2O)] · 2H2O ·0.5CH3OH (2) were synthesized and characterized by X-ray single-crystal diffraction. The crystal structure of 1 reveals that both Cds are seven-coordinate with pentagonal bipyramid geometries. Coordination polyhedra are interlinked into a 1-D chain, further linked by hydrogen bonds into a 3-D network. Complex 2 is a discrete structure, then independent [Cd3(C7H2NO5)2 · 10(H2O)] are linked by hydrogen bonds into a 3-D network. The optical properties of 1 and 2 were investigated with fluorescent spectra; both exhibit strong green luminescence probably originating from π–π* transition of the ligand. 相似文献
15.
Two new neodymium complexes, [Nd2(abglyH)6(2,2′-bipy)2(H2O)2] · 4H2O 1 and {[Nd(abglyH)3(H2O)2] · (4,4′-bipy) · 7H2O}n
2 (abglyH2 = N-P-acetamidobenzenesulfonyl-glycine acid, 2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine), have been synthesized and
their structures have been measured by X-ray crystallography. In 1, nine-coordinated Nd(III) ions are bridged by two syn–syn bidentate and two tridentate bridging carboxylate groups from four different abglyH− anions to form dinuclear motifs, which are further connected into a 3-D supramolecular framework via hydrogen bonds between
the binuclear motifs and the uncoordinated water molecules. In 2, eight-coordinated Nd(III) ions are linked by six carboxylate groups adopting a syn–syn bidentate bridging fashion to form a 1-D inorganic–organic alternating linear chain. These polymeric chains generate microchannels
extending along the a direction, and these cavities are occupied by discrete tetradecameric water clusters, which interact with their surroundings
and finally furnish the 3-D supramolecular network via hydrogen bonds. At the same time, π–π stacking interactions between
benzene rings from abglyH− anions also play an important role in stabilizing the network. 相似文献
16.
Two temperature-dependent copper(II) complexes {[Cu(HL)][Cu(HL)(H2O)]} n (1) and {[Cu(HL)]·H2O} n (2) [H3L = 4-(1H-imidazol-4-ylmethyl)aminophthalic acid] have been synthesised under hydrothermal conditions. X-ray diffraction analysis reveals that complex 1 displays two crystallographic independent units, 1D chain and binuclear unit, respectively. The 1D chains and binuclear molecules are staggered arrangements along the c-axis in an (…ABAB…) fashion. When increasing the reaction temperature, complex 2 was obtained with only 1D chains structure. In addition, the magnetic property of complex 2 was studied, which indicates antiferromagnetic interactions between the neighbouring Cu(II) centres. The electrochemical and electrocatalytic properties of complex 2 have also been studied by modified glassy carbon electrode of 2. 相似文献
17.
18.
Beedle CC Stephenson CJ Heroux KJ Wernsdorfer W Hendrickson DN 《Inorganic chemistry》2008,47(23):10798-10800
The synthesis of [Mn(4)(anca)(4)(Hmdea)(2)(mdea)(2)].2CHCl(3) (1) is reported along with room temperature fluorescence, UV-vis, and NMR spectra. Direct current magnetization versus field data reveal a S = 8 ground state. Quantized steps in temperature- and field-dependent magnetization versus field hysteresis loops confirm single-molecule magnet behavior. 相似文献
19.
20.
《Journal of Coordination Chemistry》2012,65(17):3007-3018
Syntheses, structures, and antimicrobial activities of cobalt(III) complexes with two tetradentate Schiff-base ligands, (BA)2en?=?bis(benzoylacetone)ethylenediimine dianion and (acac)2en?=?bis(acetylacetone)ethylenediimine dianion, and two axial pyridines (py) have been investigated. These complexes were characterized by FT-IR, 1H-NMR, UV-Vis spectroscopy, and elemental analysis. The crystal structures of the complexes were determined by X-ray crystallography. Single-crystal X-ray diffraction analyses revealed that both complexes have distorted octahedral environments, Schiff-base ligand coordinates cobalt in four equatorial positions, and the two axial positions are occupied by pyridines. The pyridines and Schiff-base ligands are involved in N–H···O hydrogen bonds with perchlorate. Biological activities of the ligands and metal complexes have been studied on Staphylococcus aureus, Escherichia coli, and Bacillus subtilis by the well diffusion method. The activity data show the metal complexes to be more potent than the parent ligand against two bacterial species. 相似文献