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1.
《Journal of Coordination Chemistry》2012,65(16):1873-1882
Two lanthanide complexes with 2-fluorobenzoate (2-FBA) and 1,10-phenanthroline (phen) were synthesized and characterized by X-ray diffraction. The structure of each complex contains two non-equivalent binuclear molecules, [Ln(2-FBA)3?·?phen?·?CH3CH2OH]2 and [Ln(2-FBA)3?·?phen]2 (Ln?=?Eu (1) and Sm (2)). In [Ln(2-FBA)3?·?phen?·?CH3CH2OH]2, the Ln3+ is surrounded by eight atoms, five O atoms from five 2-FBA groups, one O atom from ethanol and two N atoms from phen ligand; 2-FBA groups coordinate Ln3+ with monodentate and bridging coordination modes. The polyhedron around Ln3+ is a distorted square-antiprism. In [Ln(2-FBA)3?·?phen]2, the Ln3+ is coordinated by nine atoms, seven O atoms from five 2-FBA groups and two N atoms of phen ligand; 2-FBA groups coordinate Ln3+ ion with chelating, bridging and chelating-bridging three coordination modes. The polyhedron around Ln3+ ion is a distorted, monocapped square-antiprism. The europium complex exhibits strong red fluorescence from 5D0?→?7F j ( j?=?1–4) transition emission of Eu3+. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(24):4040-4046
Two mixed-ligand Cu(II) complexes, [CuL1(Himdz] · CH3OH (1) and [CuL2(phen)] · 0.5DMF (2), with different structures have been synthesized by using substituted aroylhydrazones, 5-bromo-salicylaldehyde-benzoylhydrazone (H2L1) and 5-bromo-salicylaldehyde-3,5-dimethoxy-benzoylhydrazone (H2L2), and mono/bidentate heterocycles, imidazole (Himdz) and 1,10-phenanthroline (phen). Their crystal structures and spectroscopic properties have been studied. X-ray analysis show a distorted square-planar geometry for 1 and a distorted square-pyramidal geometry for 2, in which the chelating phen ligand displays axial-equatorial bonding. In both structures the ONO tridentate ligand occupies the basal plane. Self-assembly via O–H ··· N, N–H ··· O and C–H ··· O interactions lead to one-dimensional chain arrangement in 1 and 2. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(15):1329-1337
A novel manganese(II) complex, [Mn(phen)(H2O)4]SO4·2H2O (1), has been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. The manganese(II) complex contains only one phen ligand and four water ligands. By a catalytic test, complex 1 provided direct evidence that phen is a key ligand instead of an auxiliary one in manganese catalase mimics. Magnetic susceptibility measurements for complex 1 have been performed down to 2?K, suggesting paramagnetic behavior for this complex. 相似文献
4.
Synthesis,Structures and DFT Studies of Imido‐bridged and (Bis)ligand‐coordinated Titanium Complexes
Jian Wu Yanmei Chen Zhou Chen Wei Liu Yahong Li Hao Pei Yonglu Liu Qian Gao Wu Li 《无机化学与普通化学杂志》2013,639(10):1876-1883
Syntheses and structures of five imido‐bridged dinuclear titanium complexes and two (bis)ligand‐coordinated mononuclear titanium complexes are reported. Addition of 1 or 2 equiv. of Schiff base ligand (((1H‐pyrrol‐2‐yl)methylene)amino)‐2,3‐dihydro‐1H‐inden‐2‐ol (H2L) to Ti(NMe2)4 resulted in transamination with 4 equiv. of dimethylamides generating a (bis)ligand‐coordinated complex Ti(L)2 ( 1 ). Treatment of Ti(NMe2)4 with 1 equiv. of tBuNH2 followed by addition of 1 equiv. of H2L afforded an imido‐bridged complex [Ti(L)(NtBu)]2 ( 2 ). 1:1:1:1 reaction of Ti(NMe2)4/RNH2/H2L/py(or phen) produced imido‐bridgedcomplexes [Ti(L)(NPh)(py)]2 ( 3 ), [Ti(L)(4‐F‐PhN)(py)]2·Tol ( 4 ·Tol), [Ti(L)(4‐Cl‐PhN)(py)]2·Tol·THF ( 5 ·Tol·THF), [Ti(L)(4‐Br‐PhN)(py)]2·Tol ( 6 ·Tol) and a (bis)ligand‐coordinated complex Ti(L)2·phen ( 7 ) (py = pyridine, phen = 1,10‐phenanthroline). Attempts to prepare the monomeric titianium imido complexes were unsuccessful. DFT studies show that the assumed compound which contains Ti = N species is less stable than imido‐bridged Ti‐N(R)‐Ti complexes, providing the better understanding of the experimental results. 相似文献
5.
Self‐assembly of Cd(phen)2+ and Cu(phen)2+ (phen = 1,10‐phenanthroline) building blocks with the bent ligand 4,4′‐dithiodipyridine (dtdp) has been investigated. Both building blocks serve as corner units with constrained cis‐geometry. The arched chain coordination polymer [{Cd(phen)(μ‐dtdp)(dtdp)(H2O)}(ClO4)2·2CH3OH·1.5H2O]n ( 1 ) crystallised from a mixture of Cd(ClO4)2·H2O, phen and dtdp in methanol. The reaction of [Cu(phen)(H2O)2](CF3SO3)2 ( 2 ) with dtdp in an ethanol/water mixture yielded a chair‐like metallamacrocycle, [{Cu(phen)(CF3SO3)2}2(μ‐dtpd)2] ( 3 ). The crystal structure of the precursor complex 2 is also reported. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(15):2761-2769
A new tetranuclear complex, {[Cu(phen)(OH)]4(H2O)2}?·?(SO4)2?·?8H2O (1) (phen = 1,10-phenanthroline), has been synthesized and characterized by elemental analysis, UV-Vis, IR, TG, and single-crystal X-ray diffraction. Complex 1 exhibits a 3-D supramolecular network with a 1-D metal–water chain consisting of tetranuclear hydroxo-bridged copper(II) clusters and water octamers and a 2-D water–sulfate layer containing cyclic water octamers with five types of O–H?···?O hydrogen-bonding motifs. The free ligand and its complex were screened for antibacterial activity against Gram-positive and Gram-negative bacteria. 相似文献
7.
Two new CdII complexes, [Cd( ces )(phen)]∞ ( 1 ) and {[Cd( ces )(bpy)(H2O)](H2O)}2 ( 2 ), were prepared by slow solvent evaporation methods from mixtures of cis‐epoxysuccinic acid and Cd(ClO4)2 · 6H2O in the presence of phen or bpy co‐ligand ( ces = cis‐epoxysuccinate, phen = 1,10‐phenanthroline, and bpy = 2,2′‐bipyridine). Single‐crystal X‐ray diffraction analyses show that complex 1 has a one‐dimensional (1D) helical chain that is further assembled into a two‐dimensional (2D) sheet, and then an overall three‐dimensional (3D) network by the interchain C–H ··· O hydrogen bonds. Complex 2 features a dinuclear structure, which is further interlinked into a 3D supramolecular network by the co‐effects of intermolecular C–H ··· O and C–H ··· π hydrogen bonds as well as π ··· π stacking interactions. The structural differences between 1 and 2 are attributable to the intervention of different 2,2′‐bipyridyl‐like co‐ligands. Moreover, 1 and 2 exhibit intense solid‐state luminescence at room temperature, which mainly originates from the intraligand π→π* transitions of aromatic co‐ligands. 相似文献
8.
A new copper(II) complex, [Cu(naph‐leu)phen]CH3OH·0.5H2O, in which naph‐leu is the tridentate Schiff base ligand derived from the condensation of 2‐hydroxy‐1‐naphthaldehyde and L‐leucine, phen is phenanthroline, has been synthesized and characterized by elemental analyses, IR spectra and single crystal X‐ray diffraction. The DNA‐binding properties of this complex have been investigated by absorption spectra, fluorescence spectra and circular dichroism (CD) spectra, as well as viscosity measurement. Results show that this copper(II) complex binds to calf thymus DNA (CT‐DNA) in an intercalative mode and its intrinsic binding constant Kb is 4.87×103 L·mol?1. Furthermore, the DNA cleavage activity of this copper(II) complex has also been investigated by submarine gel electrophoresis. Interestingly, it was found that this complex can cleave the supercoiled plasmid pBR322 DNA to both nicked and linear forms. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(13):2122-2131
An organic-inorganic hybrid compound constructed from Wells-Dawson polyanion clusters and metal-organic complex subunits, [Cu(phen)3][Cu(phen)2Cu(phen)2(P2W18O62)]·2H2O (1) has been prepared hydrothermally and characterized by elemental analysis, IR, UV, cyclic voltammetry (CV) and single-crystal X-ray diffraction. Crystal structural analysis indicates that two terminal oxygen atoms of the Wells-Dawson polyanion located in the “belt” site coordinate with Cu2+. Three Cu ions have different coordination environments: Cu1 and Cu2 are five-coordinate, while Cu3 is six-coordinate. The bisupporting polyoxoanions [Cu(phen)2Cu(phen)2(P2W18O62)]2? are polymerized into a 1D chain by hydrogen bonding interactions, then the chains are stacked into a two-dimensional structure via offset, face-to-face, π ··· π stacking interactions. CV reveals that 1 exhibits three chemically-reversible processes. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(16):2811-2819
The synthesis and structure of two Cu(II) complexes, {[Cu2(L1)2]?·?DMF} n (1) and [CuL2(phen)] (2), are described. The dinegative hydrazones are obtained by deprotonation of both phenolic and amide moieties of N′-(5-bromo-2-hydroxybenzylidene)-3,5-dimethoxybenzohydrazide (H2L1) and N′-(2-hydroxybenzylidene)pyrazine-2-carbohydrazide (H2L2). In each complex the planar ligand binds the metal ion via phenolate-O, imine-N, and amide-O. Complex 1 is a polymer in which phenoxo-bridged binuclear Cu(II) units are further joined by equatorial–apical amide-O bridges. The Cu···Cu separations are 3.0306 and 3.8217?Å for the phenolate-O bridged pair and the amide-O bridged pair, respectively. Complex 2 is a monomer where chelating phen displays axial–equatorial bonding, with square-pyramidal Cu(II). 相似文献
11.
The crystal structure of two salts of the complex [Ir(phen)Cl4]? anion with K+ (K[Ir(phen)Cl4]·H2O, 1) and Me4N+ ((Me4N)[Ir(phen)Cl4], 2) cations is determined. The iridium(III) ion is in a distorted octahedral environment consisting of chloride anions and a bidentate heterocyclic ligand of 1,10-phenanthroline (phen). A crucial role in the formation of the crystal structure of complex 1 belongs to K…Cl contacts, while in the crystal structure of complex 2, the stacking interactions dominate. 相似文献
12.
Marcin Swiatkowski 《Journal of Coordination Chemistry》2017,70(4):642-675
The coordination compounds of group 12 halides with 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen), 2[CdF2(bpy)2]·7H2O (1), [ZnI(bpy)2]+·I3? (2), [CdI2(bpy)2] (3), [Cd(SiF6)H2O(phen)2]·[Cd(H2O)2(phen)2]2+·F–·0.5(SiF6)2–·9H2O (4), [Hg(phen)3]2+·(SiF6)2–·5H2O (5), [ZnBr2(phen)2] (6), 6[Zn(phen)3]2+·12Br–·26H2O (7) and [ZnI(phen)2]+·I– (8), have been synthesized and characterized by X-ray crystallography, IR spectroscopy, elemental and thermal analysis. Structural investigations revealed that metal?:?ligand stoichiometry in the inner coordination sphere is 1?:?2 or 1?:?3. A diversity of intra- and intermolecular interactions exists in structures of 1–8, including the rare halogen?halogen and halogen?π interactions. The thermal and spectroscopic properties were correlated with the molecular structures of 1–8. Structural review of all currently known coordination compounds of group 12 halides with bpy and phen is presented. 相似文献
13.
M. Katada T. Nawa H. Kumagai S. Kawata S. Kitagawa 《Journal of Radioanalytical and Nuclear Chemistry》1999,239(2):227-232
New lanthanoid-iron complexes having phenanthlorine as the chelating ligand were synthesized and characterized by151Eu- and57Fe-Mössbauer spectroscopy. The temperature dependence of the area intensity of Mössbauer lines of europium complexes (single crystals) has been correlated to the state of molecular association in the solid state. The crystal structure of europium complex, {[Eu(phen)2(H2O)2][(μ-NC)2 Fe(CN)4]·2phen]}x was determined by X-ray crystal analysis. This complex consists of one-dimensional zig-zag chain structure. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(18):2093-2101
A new TbIII complex of 5-fluorouracil-1-acetate (5-FUA) and 1,10-phenanthroline(phen), [Tb(phen)(5-FUA)3] n ?· H2O, has been synthesized, characterized by elemental analysis, IR spectroscopy, XRD powder diffraction, thermal analysis and its structure has been determined by X-ray crystallography. The structural studies show that compound to be a two-dimensional coordination polymer and the Tb atoms to have ten-coordinate geometry, TbN2O8. Self-assembly of this compound in the solid state is likely caused by N–H·?·?·O, O?–?H·?·?·O and O–H·?·?·F hydrogen bonding. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(2):273-283
The saccharinato complexes [Zn(phen)2(sac)(H2O)]sac (1) and [Zn(sac)(dmp)(H2O)](sac) (2), where phen = 1,10-phenanthroline, dmp = 2,9-dimethyl-1,10-phenanthroline, and sac =saccharinato ion/ligand, were synthesized by the reaction of [Zn(sac)2(H2O)4] · 2H2O with ligands and have been characterized by elemental analysis, IR, and 1H NMR spectroscopies. Conductivity of complexes was measured in DMSO. Compound 1 is characterized by single crystal X-ray diffraction and compared with some isomorphous zinc-saccharinate complexes reported previously. Complex 1 crystallizes in the triclinic system, space group P 1 , with Z = 2, and consists of alternating slightly distorted octahedral [Zn(phen)2(sac)(H2O)]+ and noncoordinated saccharinate. The zinc bound aqua is hydrogen bonded to an oxygen of carbonyl in the saccharinate ligand and the SO2 group in the saccharinate counter-ion from an adjacent molecule. Intermolecular and intramolecular hydrogen bonds and C–H ··· O and C–H ··· N short contacts lead to a 3-D network. 相似文献
16.
The complex [Cu(phen)2(POAc)3]ClO·4H2O has been synthesized and investigated by elemental analysis, IR spec-troscopy and X-ray diffraction methods, where phen = 1,10-phenanthroline, POAc = phenylacetate group). The complex crystallizes in the triclinic space group PI with two molecules in a unit cell of dimensions a = 1.0579(2) nm, b = 1.2423(3) nm, c = 1.9190(4) nm, α = 71.84(1)°, β = 80.50(2)°, γ = 88.60(1)°, V = 2.3625(9) nm3, R = 0.0407 and Rw = 0.0656. The complex results from bridging of two Cu(phen)2 units by three carboxylate groups, and each Cu2 ion is in a distorted square pyramidal geometry with two nitrogen atoms of phen and three carboxylate oxygen atoms of POAc. It has been showed that intramolecular stacking interactions occur between the phenyl moieties of POAc and aromatic rings of phen, leading to a novel molecule structure with two coordinating modes of carboxylate ligands, of which two phenylacetates are μ2-carboxylate-O-bridging ligands, and the other is a μ2-carboxylate- 相似文献
17.
Reaction of CuCl2 · 2H2O, phenanthroline, maleic acid and NaOH in CH3OH/H2O (1:1 v/v) at pH = 7.0 yielded blue {[Cu(phen)]2(C4H2O4)2} · 4.5H2O, which crystallizes in the monoclinic space group C2/c (no. 15) with cell dimensions: a = 18.127(2)Å, b = 12.482(2)Å, c = 14.602(2)Å, β = 103.43(1)°, U = 3213.5(8)Å3, Z = 4. The crystal structure consists of the centrosymmetric dinuclear {[Cu(phen)]2(C4H2O4)2} complex molecules and hydrogen bonded H2O molecules. The Cu atoms are each square‐pyramidally coordinated by two N atoms of one phen ligand and three carboxyl O atoms of two maleato ligands with one carboxyl O atom at the apical position (d(Cu‐N) = 2.008, 2.012Å, equatorial d(Cu‐O) = 1.933, 1.969Å, axial d(Cu‐O) = 2.306Å). Two square‐pyramids are condensed via two apical carboxyl O atoms with a relatively larger Cu···Cu separation of 3.346(1)Å. The dinuclear complex molecules are assembled via the intermolecular π—π stacking interactions into 1D ribbons. Crossover of the resulting ribbons via interribbon π—π stacking interactions forms a 3D network with the tunnels occupied by H2O molecules. The title complex behaves paramagnetically between 5—300 K, following the Curie‐Weiss law χm(T—θ) = 0.435 cm3 · mol—1 · K with θ = 1.59 K. 相似文献
18.
The complex of Zn[(phen)(dione)Cl]ClO_4·H_2O(where phen is 1,10-phenanthroline and dione is 1,10-phenan-throline-5,6-dione)has been synthesized and characterized.The interaction of the complex with DNA was investi-gated using UV absorption,fluorescence spectroscopy and electrophoresis measurements.The results show that thecomplex mainly binds to the double helix of DNA with intercalation mode and the binding constant K is 2.4×10~4mol~(-1)·L.Moreover,the complex can efficiently cleave plasmid DNA at physiological pH and temperature.Thecleavage occurs via a hydrolysis mechanism,which is showed by adding radical scavengers,rigorously anaerobicexperiments,analysis for malondialdehyde-like products,and the hydrolysis experiment of BDNPP with a rate con-stant k_(obs)of 5.3×10~(-6)s~(-1). 相似文献
19.
Ahmet Bulut brahim Uar Okan Zafer Yeilel Hasan budak Halis
lmez Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(10):m526-m528
The title mononuclear [Cu(sq)(phen)2]·3H2O complex [sq is squarate (C4O4) and phen is 1,10‐phenanthroline (C12H8N2)] has been synthesized and the structure consists of a neutral mononuclear [Cu(sq)(phen)2] unit and three solvate water molecules. The CuII ion has distorted square‐pyramidal coordination geometry, comprised of one carboxylate O atom from a monodentate squarate ligand and four N atoms from two chelating phen ligands. An extensive three‐dimensional network of OW—H⋯O/OW hydrogen bonds, face‐to‐face π–π interactions between the 1,10‐phenanthroline aromatic rings and a weak π–ring interaction are responsible for crystal stabilization. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(11):1233-1240
Reaction of freshly-prepared CuCO3, phenanthroline monohydrate and maleic acid in CH3OH/H2O(1 : 1 v/v) at pH=2.13 yielded diaqua(1,10-phenanthroline-N,N')hydrogenmaleatocopper(II) hydrogenmaleate monohydrate, [Cu(phen)(H2O)2(C4H3O4)](C4H3O4)(H2O), which consists of [Cu(phen)(H2O)2(C4H3O4)]+ complex cations, hydrogenmaleate anions and lattice H2O molecules. Within the complex cations, the Cu atoms are each square-pyramidally coordinated by two N atoms of one chelating phen ligand and three O atoms of two H2O molecules and one hydrogenmaleato ligand with one H2O molecule at the apical position (d(Cu-N) = 2.001, 2.009 Å, equatorial d(Cu-O) = 1.966 Å and axial d(Cu-O) = 2.235 Å). Through hydrogen bonding, the complex cations, hydrogenmaleate anions and lattice H2O molecules are assembled into 1D chains, which are held together by weak Cu···O interactions (3.139 Å) to form corrugated 2D layers. Significant π-π stacking interactions between neighboring phen ligands leads to supramolecular assembly of the 2D layers. Over the temperature range 5-300 K, the complex obeys the Currie-Weiss law with an effective magnetic moment of 1.78 BM at room temperature. 相似文献