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1.
Water-soluble, relatively light-stable, chiral and achiral silver(I) complexes [[Ag(2)(ca)(2)]](n) and [[Ag(2)(ca)(2)(Hca)(2)]](n)(R- and S-Hca =(1R,4S)- and (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylic acid, respectively) prepared from the reaction of Ag(2)O with chiral and racemic Hca in 1:2 and 1:4 molar ratios were characterized by elemental analysis, TG/DTA, FTIR, and solution ((1)H, (13)C and (109)Ag) and solid-state ((13)C) NMR spectroscopy. Crystallography revealed that unique 2(1) helical polymer and zigzag structures were formed on self-assembly of the dimeric units in the crystals of [[Ag(2)(S-ca)(2)]](n) and three [[Ag(2)(ca)(2)(Hca)(2)]](n). In the crystal of [[Ag(2)(S-ca)(2)]](n) two 2(1) helices and a loop were observed in the stair-like polymer structure, whereas zigzag and a loop were seen in the crystals of three [[Ag(2)(ca)(2)(Hca)(2)]](n). Carbon NMR spectra in the solid state and in D(2)O indicated that these polymeric structures were loosely bound and fast ligand-exchange reactions took place in aqueous solution. The complexes, [[Ag(2)(ca)(2)]](n) and [[Ag(2)(ca)(2)(Hca)(2)]](n), showed a wide spectrum of effective antimicrobial activity as anticipated for weak silver(i)-O bonding complexes. Similar antimicrobial activity of [[Ag(2)(ca)(2)]](n) and [[Ag(2)(ca)(2)(Hca)(2)]](n) against selected microorganisms suggested that ligand exchangeability played an important role as well as the coordination geometry of the silver(i) ion. 相似文献
2.
3.
Self-assembly between silver carboxylates with 2-aminopyridine derivatives give two silver(I) complexes, [[Ag(5MP)2(CNB)] · NH3 (I) and [Ag(3MP)2(HMB)] (II), where 5MP, CNB, 3MP, and HMB represent 2-amin-5-methylpyridine, 5-chloro-2-nitrobenzoate, 2-amino-3-methylpyridine, and 2-hydroxy-3-methoxybenzoate, respectively. The crystal structures of the complexes were investigated. The Ag atom in each complex is coordinated by two pyridine N atoms and weakly coordinated by a carboxylic O atom. The crystal of I is triclinic: space group P $ \bar 1 $ , a = 7.562(2), b = 11.708(3), c = 12.933(3) Å, α = 103.378(4)°, β = 93.910(4)°, γ = 99.001(4)°, V = 1093.7(5) Å3, Z = 2. The crystal of II is monoclinic: space group C2/c, a = 25.727(5), b = 10.274(2), c = 19.872(4) Å, β = 126.62(3)°, V = 4215.7(15) Å3, Z = 4. 相似文献
4.
Three Ag(I) complexes of reduced Schiff base amino acid ligands, [Ag2(Hshis)2]·3H2O (1), Ag(Hcgly) (2), and Ag(cala) (3) (H2shis = N-(2-hydroxybenzyl)-l-histidine, H2cgly = N-(2-hydroxy-5-chlorobenzyl)-glycine, Hcala = N-(4-chlorobenzyl)-d,l-alanine), have been synthesized and characterized by X-ray crystallography. Complex 1 shows a dimeric structure, while complex 2 shows one-dimensional zigzag chains, which are extended into a two-dimensional supramolecular sheet by hydrogen bonds. Complex 3 exhibits a 2D sheet structure with dangling arms. The antimicrobial activities of the complexes have been investigated. 相似文献
5.
Jing-An Zhang Mei Pan Jian-Yong Zhang Hai-Ke Zhang Zhi-Jin Fan Bei-Sheng Kang Cheng-Yong Su 《Polyhedron》2009
Three silver(I) complexes of the asymmetric tridentate ligand 8-((pyridin-3-yl)methylthio)quinoline (TQMP3), namely [Ag2(TQMP3)2(NO3)2] (1), [Ag2(TQMP3)2(CF3CO2)2] (2) and {[Ag2(TQMP3)2](CF3SO3)2(H2O)}n (3), have been prepared by the method of layering and diffusing of diethyl ether. The structures of the complexes have been identified by elemental analysis (EA), infrared spectra (IR) and single-crystal diffraction, and are composed of discrete binuclear rings in complexes 1 and 2, with π–π interactions or H-bonds further extending the structures into 2D nets, while in complex 3, Ag?Ag interactions between the rings result in a 1D polymer chain. The antibacterial, antifungal and pesticide activities of the three complexes were tested. 相似文献
6.
Gang Wu Xiao-Feng Wang Min Chen Norikazu Ueyama 《Journal of solid state chemistry》2010,183(9):2174-2182
Five new silver(I) complexes [Ag2(L2)2](BF4)2·CH3CN·CH3OH (1), [Ag(L2)(CF3SO3)] (2), [Ag(L3)]ClO4·CH3OH (3), [Ag2(L3)2](CF3SO3)2·CH3CN·CH3OH·H2O (4) and [Ag(L3)]PF6·2CH3CN (5) [L2=1,3,5-tris(2-pyridylmethoxyl)benzene, L3=1,3,5-tris(3-pyridylmethoxyl)benzene] were synthesized and characterized by single crystal X-ray diffraction analyses. In complexes 1-5, ligands L2 and L3 show different conformations and act as three-connectors, while the Ag(I) atom serves as three-connecting node to result in the formation of 2D and 3D frameworks. Complexes 1 and 2 with different counteranions have similar 2D network structure with the same (4,82) topology. Complex 3 has a 3D structure with (10,3)-a topology while complexes 4 and 5 have the same 2D (6,3) topological structure. The results showed that the structure of organic ligands and counteranions play subtle but important role in determining the structure of the complexes. In addition, the photoluminescence and anion-exchange properties of the complexes were investigated in the solid state at room temperature. 相似文献
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8.
Three terephthalato-bridged dinuclear silver(I) complexes with the formulae Ag2(5map)4(tphth), [Ag2(6map)4(tphth)] · 2H2O, and [Ag2(4map)4(tphth)] · 2H2O (5map = 5-methyl-2-aminopyridine, 6map = 6-methyl-2-aminopyridine, 4map = 4-methyl-2-aminopyridine, tphth = terephthalate),
have been synthesized and characterized by elemental analysis and single crystal X-ray diffraction. The Ag atom in each of
the complexes is three-coordinate in a trigonal geometry with one carboxylate O atom and two pyridine N atoms. The characteristic
difference among the complexes is the positions for the methyl groups of the aminopyridine ligands. The crystals of the complexes
are stabilized by intermolecular N–H···O and O–H···O hydrogen bonds.
Electronic supplementary material The online version of this article () contains supplementary material, which is available to authorized users. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(22):4023-4040
Binuclear ruthenium(III) complexes [RuX3L]2?·?nH2O (X?=?Cl, L?=?L1, L2, L3; n?=?1, L4 and L5, X?=?Br; L?=?L3), [RuX3L1.5]2?·?nH2O (X?=?Br, L?=?L1; n?=?0, L4; n?=?6 and L5; n?=?10), and [RuX3L2]2 (X?=?Br, L?=?L2) have been isolated by treatment of hydrated RuX3 (X?=?Cl/Br) in acetone with 2-(2′-aminophenylbenzimidazole) (L1), 2-(3′-aminophenylbenzimidazole) (L2), 2-[(3′-N-salicylidinephenyl)benzimidazole] (L3), 2-(3′-pyridylbenzimidazole) (L4), and 2-(4′-pyridylbenzimidazole) (L5) in acetone. The complexes were characterized by elemental analysis, conductivity and magnetic susceptibility measurements, IR, electronic, EPR, and mass spectral studies. The complexes were dimeric; based on analytical and spectral studies, an octahedral geometry was proposed for the complexes. The synthesized complexes were screened against Gram-positive and Gram-negative bacteria and fungi. 相似文献
10.
《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
11.
Yaping Cao Cenlan Yi Hongmei Liu Haixia Li Qipeng Li Zeli Yuan Gang Wei 《Transition Metal Chemistry》2016,41(5):531-538
Four oxovanadium(IV) complexes, namely [VO(desa-met)(phen)]·MeOH·2H2O (1) (desa-met = Schiff base derived from 4-(diethylamino)salicylaldehyde and dl-methionine, phen = 1,10-phenanthroline), [VO(o-van-met) (phen)]·MeOH·CH2Cl2·3H2O (2) (o-van-met = Schiff base derived from o-vanillin and dl-methionine), [VO(dtbs-napa)(phen)]·2H2O (3) (dtbs-napa = Schiff base derived from 3,5-di-tert-butyl salicylaldehyde and 3-(1-naphthyl)-l-alanine) and [VO(hyna-napa)(phen)]·1.5H2O (4) (hyna-napa = Schiff base derived from 2-hydroxy-1-naphthaldehyde and 3-(1-naphthyl)-l-alanine), were synthesized and characterized by IR, HRMS, UV–vis spectra, molar conductance and single-crystal X-ray diffraction (XRD). X-ray structural analysis showed that the V(IV) atoms in all four complexes are six-coordinated in a distorted octahedral environment. In the crystals of complexes 1 and 2, π–π stacking interactions together with hydrogen bonds connect the molecular units into 2D networks. Meanwhile, CH–π stacking interactions are observed between the aromatic rings in the crystals of 1 and 4, while the π–π stacking interactions between aromatic rings in the crystals of 2 and 3 are arranged with a face-to-face mode. The in vitro anticancer activities of these complexes against A-549 and HeGp2 cells were tested by MTT assay. 相似文献
12.
The syntheses of four new bis(imino)acenaphthene (BIAN) imidazolium chlorides are reported, three of which have been structurally characterized. The synthesis of a new, structurally authenticated BIAN ligand is also described. We report the results of the use of these BIAN imidazolium salts as antimicrobials against the pathogens S. aureus, B. subtilis, E. coli and P. aeruginosa. The antimicrobial efficacies were particularly high for the N-(2,6-diisopropylphenyl)- and N-(mesityl)-substituted BIAN imidazolium salts (MIC values < 0.6 μg/mL). 相似文献
13.
Chun-Hong Tan Xiao Ma Qi-Long Zhu Yi-Hui Huang Rui-Biao Fu Sheng-Min Hu Tian-Lu Sheng Xin-Tao Wu 《Journal of Molecular Structure》2012
Two dinuclear molecule-bridged Cu(I) complexes, (μ-bpym)[Cu(PPh3)Cl]2 (1), [(μ-bpym)(CuL)2](ClO4)2·(CH3CN)2(H2O) (2) (bpym = 2,2′-bipyrimidine, L = (R)-(+)-2,2′-bis(diphenylphospho)-1,1′-dinaphthalene) have been synthesized and characterized. The molecular structures of the two new dinuclear compounds exhibit bridging of two copper(I) centers by the symmetrically bis-chelating bpym ligand. Intriguingly, compound 1 features a remarkable “intramolecular organic sandwich” configuration where the central 2,2′-bipyrimidine bridging ligand interacts in π/π/π fashion with two phenyl rings from the coligands above and below the central plane, while chiral compound 2 exhibits second-order nonlinear optical effect and temperature-dependent luminescence. Upon decreasing the temperature from 298 to 10 K, compound 2 shows a red light emission. 相似文献
14.
《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
15.
Chang-Xue An Xin-Li Han Peng-Bang Wang Zhi-Hui Zhang Hai-Ke Zhang Zhi-Jin Fan 《Transition Metal Chemistry》2008,33(7):835-841
Abstract Two new complexes, [Ag(L)2](NO3) · (H2O) (1) and [Co(L)2Cl2] (2) [L = 1-(imidazol-1-yl-methyl)-benzotriazole], have been synthesized and structurally characterized by X-ray diffraction techniques.
In complex (1), the Ag(I) atom adopts a linear coordination geometry involving the imidazole nitrogens of two ligands. The [Ag(L)2] units are developed into a three-dimensional structure by intermolecular hydrogen bonds, π–π interactions, and Ag···O interactions.
In complex (2), the Co(II) atom is in a distorted tetrahedral environment with two imidazole nitrogens and two chloride ligands. The [Co(L)2Cl2] units are assembled into a three-dimensional structure by intermolecular hydrogen bonds and π–π interactions. The bioactivities
of both complexes have been studied, and the results indicate that complex (1) exhibits excellent radical-scavenging (RS) and fungicidal (FG) activities while complex (2) only has weak fungicidal activity.
Graphical abstracts
Synthesis, crystal structures and biological activities of silver(I) and cobalt(II) complexes with an azole derivative ligand.
Chang-Xue An, Xin-Li Han, Peng-Bang Wang, Zhi-Hui Zhang*, Hai-Ke Zhang and Zhi-Jin Fan
Two novel complexes, [Ag(L)2](NO3) · (H2O) (1) and [Co(L)2Cl2] (2) [L = 1-(imidazol-1-yl-methyl)-benzotriazole] have been synthesized and structurally characterized. The molecules of complexes
(1) and (2) are extended to 2-D and 3-D structures by the non-coordinated bonds. The ligand and complex (1) exhibit excellent radical-scavenging and fungicidal activities.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
16.
Two polymeric silver(I) complexes, [Ag4(TAA)2(TA)2] · 2[Ag(TA)2] (I) and [Ag2(TA)(BA)]
n
(II), where TAA is tris(2-aminoethyl)amine, TA is terephthalic acid, BA is butane-1,4-diamine, were synthesized and structurally
characterized by elemental analyses and X-ray diffraction. Complex I consists of mononuclear [Ag(TA)2] units and TA-bridged tetranuclear [Ag4(TAA)2(TA)2] units, which are further linked via Ag…Ag interactions to form chains. In complex II, the silver atoms are linked by the TA and BA groups to form chains, which are further linked via Ag…Ag interactions to form
layers. In both complexes, molecules are finally linked through intermolecular hydrogen bonds to form three-dimensional networks. 相似文献
17.
Four new silver(I) complexes constructed with 2-(4-pyridyl)benzimidazole, namely, [Ag(PyBIm) · H2O] · NO3 (1), [Ag(PyBIm) · H2O] · ClO4 (2), [Ag2(PyBIm)2] · (SiF6) · 2H2O (3) and [Ag(PyBIm) · (HBDC)] (4) (PyBIm = 2-(4-pyridyl)benzimidazole, BDC = 1,3-benzenedicarboxylate) have been synthesized and characterized by X-ray crystallography. All the silver(I) atoms in complexes 1–4 are bridged by the different PyBIm ligands via NPy and NBIm into one-dimensional “zigzag” chains. The anions do not coordinate to the silver(I) atoms and only act as counter ions in complexes 1–3. Due to the anions, different hydrogen bonding systems are found in those three compounds, resulting in the different crystal packing. Through hydrogen bonding interactions, the structures of complexes 1–3 display a double layer, a three-dimensional framework and a novel double chain, respectively. In complex 4, the HBDC− anions act not only as a counter ion but also as bridging ligands, which lead the “zigzag” [Ag2(PyBIm)2]∞ chain into a two-dimensional undulating sheet. The sheets are connected through hydrogen-bonding as well as π–π interactions into a three-dimensional framework. The thermal stabilities of the four complexes and anion exchange properties of complexes 2 and 3 were also studied. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(21):3903-3917
Four metal(II) complexes with benzene-1,2,3-triyltris(oxy)triacetic acid (H3L), {[Co1.5(L)(H2O)6]·6H2O}n (1), {[Co1.5(L)(4,4′-bipy)1.5(H2O)4]·4H2O}n (2), {[Co(HL)(2,2′-bipy)(H2O)2]·1.5H2O}n (3), and {[Cu(HL)(phen)(H2O)2]·H2O}n (4) (4,4′-bipy = 4,4′-bipyridine; 2,2′-bipy = 2,2′-bipyridine; phen = phenanthroline), were prepared and structurally characterized. Complex 2 displays a 1-D structure, while 1, 3, and 4 reveal 0-D structures, which further extend to 3-D supramolecular networks by hydrogen bonding interactions, of which 1 and 4 contain double-helical chains, 2 includes meso-helices, and 3 comprises single-helices. Furthermore, the thermal stabilities and antibacterial activities of the complexes were studied. 相似文献
19.
In this Article, 11 silver complexes, namely, [Ag(L1)(2-Pyr)(H2O)] (1), Ag(L1)(2,3-Pyr) (2), [Ag2(L1)2(2Et,3Me-Pyr)2(H2O)] (3), [Ag(2,6-Pyr)](L1).1.5H2O (4), Ag(L1)(2,5-Pyr) (5), [Ag(H2O)2](L2).H2O (6), [Ag(L2)(2-Pyr)] (7), [Ag(L2)(2,3-Pyr)].1.5H2O (8), [Ag(L2)(2Et,3Me-Pyr)].2H2O (9), [Ag2(L2)(2,6-Pyr)(H2O)2](L2).H2O (10) and [Ag(L2)(2,5-Pyr)].H2O (11) (2-Pyr=2-methylpyrazine; 2,3-Pyr=2,3-dimethylpyrazine; 2Et,3Me-Pyr=2-ethyl-3-methylpyrazine; 2,6-Pyr=2,6-dimethylpyrazine; 2,5-Pyr=2,5-dimethylpyrazine; L1=p-aminobenzenesulfonate anion and L2=6-amino-1-naphthalenesulfonate anion), have been synthesized and characterized by elemental analyses, IR spectroscopy, and X-ray crystallography. In 1, 3, and 4, Ag(I) centers are linked by bridging pyrazine ligands to form one-dimensional chains, whereas compound 2 shows a double-chain structure through weak Ag-C interactions. The structure analyses show that both 5 and 11 form two-dimensional networks composed of 26-membered metallocycles. Unexpectedly, compounds 6 and 10 show discrete structures. In compound 7, silver(I) centers are bridged by sulfonate anions to form a polymeric helical structure, and the 2-Pyr molecule acts as a monodentate ligand. Compounds 8 and 9 show hinged chain structures containing 14-membered rings, and these chains interlace with each other to generate unique three-dimensional structures. These results indicate that the substituting groups and the substituting sites of pyrazine derivatives play an important role in the framework formation of silver complexes. Additionally, the luminescent properties of these compounds are also discussed. 相似文献
20.
Sambuddha Banerjee Susmita Mondal Writachit Chakraborty Soma Sen Ratan Gachhui Ray J. Butcher Alexandra M.Z. Slawin Chitra Mandal Samiran Mitra 《Polyhedron》2009,28(13):2785-2793
From a mononuclear Cu(II)-hydrazone complex [Cu(PBH)2] (1), one μ1,1-azido bridged dinuclear Cu(II) complex having the formula [{Cu(PBH)(μ1,1-NNN)}2] (2) (where HPBH = 2-pyridinecarboxaldehyde benzoyl hydrazone) has been synthesised. Both the complexes are characterised by elemental analyses, IR and UV–Vis spectroscopic studies. The tridentate hydrazone pro-ligand (HPBH) is obtained by the condensation of benzhydrazide and pyridine-2-carboxaldehyde. The structures of the complexes have conclusively been established by the X-ray single crystal diffraction method. Complex 1 and 2 both display DNA binding ability, which is ascertained by UV–Vis titration and cyclic voltammetric studies using calf thymus DNA (CT-DNA). The apparent binding constants (Kapp) are of moderate values and are 2.048 × 104 M−1 (±0.006) and 1.644 × 104 M−1 (±0.005), respectively. The modes of binding of the complexes with CT-DNA has been investigated using circular dichroism, ethidium bromide displacement assay and viscosity measurements. The cleavage properties of these complexes as well as the free pro-ligand with super coiled (SC) pUC19 are studied using the gel electrophoresis method, where both the complexes displayed chemical nuclease activity in the presence of H2O2 via an oxidative mechanism. The antimicrobial study using the free pro-ligand, 1 and 2 against both Gram positive and Gram negative bacteria are performed, 2 showed antimicrobial activity against both Gram negative and Gram positive bacteria whereas the free ligand and 1 show no antibacterial activity. 相似文献