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1.
《Journal of Coordination Chemistry》2012,65(5):752-765
Three inorganic–organic hybrid materials based on Keggin-type polyoxometalates (POMs), [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2][PMo12O40]2·2H2O (1), [CuII(phen)2(H4,4′bipy)][PW12O40]·H2O (2), and [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2](H24,4′-bipy)0.5·3H2O (3) (phen = 1,10-phenanthroline, 4,4′-bipy = 4,4′-bipyridine), were synthesized using different POMs in the hydrothermal conditions. Compounds 1–3 were characterized by single-crystal X-ray diffraction, IR spectra, elemental analyses, powder X-ray diffraction analyses, and thermogravimetric analyses. Compound 1 presents a two-dimensional (2-D) network containing the Keggin-type [PMo12O40]3? anion and dinuclear metal–organic units [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2]3+. Compound 2 is a 2-D architecture constructed from a [PW12O40]3? and mononuclear metal–organic units [CuII(phen)2(H4,4′-bipy)]3+. In 3, the [BW12O40]5? anions link [CuII2(phen)2(4,4′-bipy)] units to form a one-dimensional (1-D) chain [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2]; the 1-D chain connects with protonated 4,4′-bipy ligands and lattice waters, yielding a 2-D layer. Fluorescence spectra, UV–vis spectra, and electrochemical properties of 1–3 have been investigated. 相似文献
2.
A series of new oxo-vanadium(IV) complexes, [VOCl0.69(OH)0.31 (2,2′-bipy)2]Cl·2H2O (1, 2,2′-bipy?=?2,2′-bipyridine) [(VO)2Cl4(4,4'-bipy)3 (H2O)2] (2, 4,4'-bipy?=?4,4'-bipyridine), [VO(ida)(H2O)]n (3, H2ida?=?iminodiacetic acid), and [(VO)2(oa)4]n·4n(H3O)·n(H2O) (4, H2oa?=?oxalic acid), have been synthesized and structurally characterized. 1 contains a [VOCl0.69(OH)0.31(2,2′-bipy)2]+ cation, Cl – anion and two free H2O molecules. 2 exhibits a binuclear centrosymmetric moiety built up from two [VOCl2(4,4'-bipy)(H2O)] units and one bridging 4,4'-bipy ligand, which provides a rare example of a 4,4'-bipy molecule acting as monodentate ligand. 3 displays a neutral chain [VO(ida)(H2O)]n constructed by the linkages of [VO(H2O)]2+ units and ida2? bridging ligands, while 4 offers the only example of three kinds of oa2- ligands coexisting within the same anionic chain [(VO)2(oa)44-]n. Their spectroscopic properties were investigated, and the magnetic susceptibility of 4 shows antiferromagnetic behavior. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(4):668-680
Two new ZnII complexes, {[Zn(L)(phen)(H2O)]?·?H2O}∞ (1) and {[Zn(L)(4bpy)(H2O)]?·?H2O}∞ (2) (L?=?5,6-dihydro-1,4-dithiin-2,3-dicarboxylate, phen?=?1,10-phenanthroline, and 4bpy?=?4,4′-bipyridine), have been prepared by in situ reaction of Zn(ClO4)2?·?6H2O with 5,6-dihydro-1,4-dithiin-2,3-dicarboxylic anhydrate in the presence of lithium hydroxide, together with incorporating chelating phen or bridging 4bpy as co-ligands. Their structures were determined by single-crystal X-ray diffraction. Complex 1 takes a 1-D helical structure that is further assembled into a 2-D network by O–H?···?O, C–H?···?O hydrogen bonds, and weak S?···?S interactions, and then an overall 3-D supramolecular framework was formed by π?···?π stacking interactions. Complex 2 possesses a 2-D (4,4)-layered structure. The structural difference between 1 and 2 can be attributed to the different N-donor auxiliary co-ligands. Both 1 and 2 are photoluminescent materials whose emission properties are closely related to their intrinsic structure. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(23):4077-4087
Two complexes, [Cu2(TFSA)(2,2′-bpy)4]?·?TFSA?·?8H2O (1) and {[Cu(4,4′-bpy)(H2O)2]?·?TFSA?·?6H2O} n (2) (H2TFSA?=?tetrafluorosuccinic acid, 2,2′-bpy?=?2,2′-bipyridine, and 4,4′-bpy?=?4,4′-bipyridine), have been synthesized and structurally characterized by X-ray structural analyses. Complex 1 is a binuclear molecule bridged by TFSA ligands; 2 is a 1-D chain bridged by 4,4′-bpy ligands. The asymmetric units of the two complexes are composed of cationic complexes [Cu2(TFSA)(2,2′-bpy)4]2+ (1) and [Cu(4,4′-bpy)(H2O)2]2+ (2), free TFSA anion, and independent crystallization water molecules. A unique 2-D hybrid water–TFSA anionic layer by linkage of {[(H2O)8(TFSA)]2?} n fragments consisting of 1-D T6(0)A2 water tape and TFSA anionic units by hydrogen bonds in 1 was observed. Unique 2-D hybrid water–TFSA anionic layer generated by the linkage of {[(H2O)6(TFSA)]2?} n fragments consisting of cyclic water tetramers with appended water molecules and TFSA anionic units, and 1-D metal–water tape [Cu–H2O?···?(H2O)6?···?H2O?] n in 2 were found. 3-D supramolecular networks of the two complexes consist of cationic complexes and water–TFSA anionic assemblies connected by hydrogen bonds. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(16):2923-2935
Two new coordination complexes, [Zn(IA)2(phen)] (1) and [Zn(IA)2(4,4′-bipy)] n ?·?C2H5OH (2) (IAH?=?indole-3-acetic acid, phen?=?1,10-phenanthroline, 4,4′-bipy?=?4,4′-bipyridine), have been prepared and characterized by single-crystal X-ray diffraction. Complex 1 is mononuclear and 2 presents a 1-D zigzag chain, in which 4,4′-bipy connects the Zn(II) ions. Both complexes show fluorescence emissions and exhibit fluorescence quenching when Hg2+ ions are present. ICP, EDS, and SEM experiments reveal that zinc in both complexes can be exchanged by toxic mercury ions. 相似文献
6.
Qing Lin Guan Xue Gao Jing Liu Wen Juan Wei Yong Heng Xing 《Journal of Coordination Chemistry》2016,69(6):1026-1038
[Cu2(UO2)4(suc)4(pac)4] (1), [(Cu(H2O)2)(4,4′-bipy)2][(UO2)2(H2O)2(Hca)2]·3H2O (2), and [(Cu(H2O)2)(UO2)(bta)]·4H2O (3) were synthesized by the reaction of succinic acid and 3-pyridinecarboxylic acid, citric acid and 4,4′-bipyridine, or 1,2,4,5-benzenetetracarboxylic acid ligands with Cu(NO3)2·3H2O and UO2(CH3COO)2·2H2O. The complexes were characterized by IR and UV–vis spectroscopy, powder X-ray diffraction, single-crystal X-ray diffraction, and photoluminescence spectroscopy. Photocatalytic activities of the complexes were also investigated. 相似文献
7.
《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
8.
《Journal of Coordination Chemistry》2012,65(15):2489-2498
AbstractFive new coordination complexes [MnII (L1)2(4,4′-bpy)]n (1), [NiII (L1)2(4,4′-bpy)]n (2), [ZnII (L1)2(4,4′-bpy)]n (3), [CuII (L1)2(phen)2]Cl2 (4) and [CuII 2(L1)2(2,2′-bpy)2]Cl2 (5) (HL1?=?3,4,5-trifluorobenzeneseleninic acid, 4,4′-bpy = 4,4′-bipyridine, 2,2′-bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline), have been synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), elemental analysis and IR spectroscopy. Complexes 1–3 display similar layers structures. In 1–3, the adjacent layers are further connected through π···π interactions to form three-dimensional supramolecular structures. Complexes 4 and 5 show a dimer containing an eight-membered ring. The dimer extends into three-dimensional supramolecular structures through π···π interactions, C–H···F and C–H···Cl interactions. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(18):3274-3286
Hydrothermal reactions of lanthanide chloride, phosphonoacetic acid (H2O3PCH2COOH), and water in the presence of HCl provide a series of lanthanide coordination polymers. FT-IR spectra confirm that there are three kinds of structures among seven complexes, {[Ln2(O3PCH2CO2)2(H2O)3]?·?H2O}∞ (type I) (Ln?=?LaIII for 1; PrIII for 2; NdIII for 3 and EuIII for 4), [Ln(O3PCH2CO2)(H2O)2]∞ (type II) (Ln?=?TbIII for 5), and [Ln(O3PCH2CO2)(H2O)2]∞ (type III) (Ln?=?HoIII for 6 and YbIII for 7). Complexes 1–5 show 2-D 4,4,5,5-connected (44?·?62)(45?·?6)(46?·?64)(48?·?62) topology networks and 2-D 4-connected (44?·?62) topology networks and then are further linked into 3-D supramolecular networks by hydrogen-bonding interactions; 6 and 7 both exhibit a 3-D 4-connected (42?·?63?·?8) topology with 1-D dumbbell-shaped channels. The results indicate infrared spectroscopy is in accord with the result of single-crystal X-ray analysis. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(9):1613-1628
Vanadium complexes (VO)2(2,2′-bipy)2(bta)(H2O)2 (1) and (VO)2(1,10-phen)2(bta)(H2O)2 (2) (H4bta?=?1,2,4,5-benzenetetracarboxylic acid, 2,2′-bipy?=?2,2-bipyridine and 1,10-phen?=?1,10-phenanthroline) have been synthesized by the reaction of V2(SO4)3, H4bta, 2,2′-bipy (for 1) and 1,10-phen (for 2) by hydrothermal methods. The complexes were characterized by elemental analysis, IR, UV–vis, thermogravimetric analyses, and single-crystal X-ray diffraction. Structural analyses indicate that 1 and 2 are both VO-bta-N-heterocycle system complexes. The central vanadium is coordinated by N2O4 donors to form a distorted octahedral geometry. The complexes exhibit catalytic bromination activity in a single-pot reaction with conversion of phenol red to bromophenol blue in a mixed solution of H2O-DMF at 30?±?0.5?°C with pH 5.8, indicating that they can be considered as a functional model of vanadium-dependent haloperoxidases. The practical application of H2O2 detection has also been studied. 相似文献
11.
《Journal of Coordination Chemistry》2012,65(11):1997-2005
The DNA cleavage activities of two coordination polymers of Robson-type macrocycles, {[Cu4L1(4,4′-bipy)2](ClO4)4·H2O}∞ (1) and {[Cu4L2(4,4′-bipy)4](ClO4)4·2CH3CN·2H2O}∞ (2) (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 studied. The interactions of the complexes with calf thymus-DNA were investigated by UV–vis spectroscopy, CD spectroscopy, and gel electrophoresis. The binding constants of 1 and 2 are 7.2 × 104 and 2.1 × 105 M?1, respectively. The complexes exhibit DNA cleavage activity, with the cleavage process involving oxidative cleavage of DNA. 相似文献
12.
《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
13.
《Journal of Coordination Chemistry》2012,65(13):1419-1426
Asymmetric citrato dioxovanadates(V), [Hneo]4[V2O4(R-Hcit)(OH)][V2O4(S-Hcit)(OH)]?·?4H2O (1) and [Ni(phen)3]2[V2O4(R-Hcit)(OC2H5)][V2O4(S-Hcit)(OC2H5)]?·?4H2O (2) and (H4cit?=?citric acid, neo?=?2,9-dimethyl-1,10-phenanthroline, phen?=?1,10-phenanthroline) are isolated with the help of large counterions. Structural analyses of complexes 1 and 2 show that vanadium atoms are coordinated by tridentate citrate ligand and hydroxy or ethoxy groups, respectively. The insertions of hydroxy and ethoxy groups give new examples of the mixed RO-bridges for vanadium–citrate complexes. 相似文献
14.
《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
15.
《Journal of Coordination Chemistry》2012,65(10):1770-1781
Four new anthraquinone-1,5-disulfonate (L)-based metal complexes with N,N-bidentate chelating coligands, {[Pb(phen)2(L)]?·?4H2O} n (1), {[Mn2(2,2′-bipy)2(H2O)6(L)]?·?L?·?6H2O} (2), [Co(phen)2(H2O)(L)] (3), and [Zn(phen)2(H2O)(L)] (4) (phen = 1,10-phenanthroline and 2,2′-bipy?=?2,2′-bipyridine), have been hydrothermally synthesized and were structurally characterized by single-crystal X-ray diffraction, elemental analyses, FT-IR spectra, thermogravimetric curves, and solid luminescence spectra. Structural analysis suggests that 1 is a polymeric 1D zigzag chain bridged by dianionic L. In contrast, the other three complexes have discrete centrosymmetric binuclear structure for 2 and isolated isomorphic mononuclear entities for 3 and 4, which are further assembled into 3D supramolecular networks by abundant hydrogen-bonding and/or π–π stacking interactions. Additionally, 2 and 4 exhibit favorable luminescent emissions, suggesting they are potential candidates for light emission materials. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(21):2273-2281
Two copper(II) triphosphonate compounds, Cu[(APTPH4)(phen)(H2O)]?·?2.16H2O (1) and [Cu(APTPH4)(2,2′-bipy)(H2O)]?·?2.63H2O (2), have been prepared by a low temperature hydrothermal reaction from 1-aminopropane-1,1,3-triphosphonic acid (APTPH6), CuO and a second ligand, phen?=?1,10-phenanthroline, or 2,2′-bipy?=?2,2′-bipyridyl. These two compounds were characterized by single crystal X-ray diffraction, elemental analysis, IR and TG. Crystal data for 1: Monoclinic, space group P21 /c, a?=?14.4830(7)?Å, b?=?9.1721(5)?Å, c?=?16.7403(8)?Å, β?=?90.101(2)°. For compound 2: Triclinic, space group P 1, a?=?7.1215(7)?Å, b?=?10.460(2)?Å, c?=?14.671(2)?Å, α?=?82.983(2)°, β?=?83.882(2)°, γ?=?80.617(2)°. In both compounds, each Cu2+ ion is five-coordinate with two oxygen atoms from the triphosphonate, two nitrogen atoms from the second ligand and one water molecule, to form a distorted square-pyramidal geometry. Both complexes have 3D supramolecular structures constructed by hydrogen bonds and π–π stacking interactions. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(12):2110-2116
A new linear trinuclear Cu(II) complex, [Cu3(NTA)2(4,4′-bpt)4(H2O)2]?·?10H2O (H3NTA?=?nitrilotriacetic acid, 4,4′-bpt?=?4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole) (1), was obtained from evaporation of an aqueous solution containing Cu(NO3)2?·?6H2O, 4,4′-bpt, nitrilotriacetic acid (H3NTA), and NaOH. 1 was characterized using single-crystal X-ray diffraction, IR, and elemental analysis. In the trimer, the three linear copper ions are bridged by two NTA carboxylate groups in a syn–anti conformation and connected by 4,4′-bpt to produce a 1-D array. Temperature-dependent magnetic susceptibilities reveal the presence of weak antiferromagnetic exchange between metal centers. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(3):545-554
Two cadmium complexes, {[Cd2(2,5-tda)2(ip)4]·4H2O}n (1) and {[Cd2(4,4′-obb)2(ip)2·H2O]·H2O}n (2) (2,5-tda?=?thiophene-2,5-dicarboxylic acid, 4,4′-obb?=?4,4′-oxybisbenzoic acid, ip?=?1H-imidazo[4,5-f][1, 10]-phenanthroline), were synthesized and characterized by IR, elemental analysis, powder X-ray diffraction, and single-crystal X-ray diffraction. X-ray analysis revealed that 1 is a dinuclear complex with the 2,5-tda anion connecting two Cd ions in a μ1-η1:η0/μ1-η1:η0 coordination mode. Each dinuclear complex is further connected with neighboring complexes via hydrogen-bonding interactions. Compound 2 displays a 2-D layer structure with opened windows occupied by crystallographic water molecules. The layers are further packed via hydrogen-bonding interactions. Luminescent properties for 1 and 2 are also investigated in the solid state at room temperature. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(6):847-856
Three new complexes, [Cu(phen)(L-argH+)Cl]Cl?·?2.5H2O (1), [Cu(phen)(L-leu)(H2O)]Cl?·2.5H2O (2) and [Cu(phen)(L-met)(H2O)]Cl?·?2H2O (3), where phen?=?1,10-phenanthroline, L-arg?=?L-argininate, L-leu?=?L-leucinate, and L-met?=?L-methioninate, were synthesized and characterized by elemental analysis, molar conductivity, IR and UV-Vis spectroscopies. Complex 1 was structurally characterized by single-crystal X-ray diffraction. The superoxide dismutase (SOD)-like activities of the three complexes were determined by the improved NBT method. The results show that the complexes have high superoxide dismutase-like activities and may act as good mimics for superoxide dismutases. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(2):222-231
Two new compounds, [Cd2(bptc)(bpimb)(H2O)]?·?2H2O (1) and [Cd2(bptc)(bpib)]?·?4H2O (2) (where H4bptc?=?biphenyl-3,3′,4,4′-tetracarboxylic acid, bpimb?=?1,3-bis((2-(pyridin-2-yl)-1H-imidazol-1-yl)methyl)benzene, bpib?=?1,4-bis(2-(pyridin-2-yl)-1H-imidazol-1-yl)butane), were synthesized by reactions of the corresponding metal salts with H4bptc and N-containing auxiliary ligands and their structures have been determined by single-crystal X-ray diffraction. Compound 1 is built by Cd4-clusters which further construct a 3-D (3,8)-connected framework with tfz-d notation; 2, also built by Cd4-clusters, is a 3-D (4,8)-connected framework with (32?·?42?·?52)(34?·?48?·?512?·?64) topology. In addition, the elemental analyses, infrared spectra, fluorescence, and thermogravimetric analyses for 1 and 2 are discussed. 相似文献