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1.
《Journal of Coordination Chemistry》2012,65(24):4254-4263
The self-assembly reaction of 1,4-bis(1,2,4-triazol-1-yl)butane (btb) and Ni(II) salts gives three coordination polymers {[Ni(btb)2(NCS)2]?·?H2O} n (1), [Ni(btb)2(NCO)2] n (2), and [Ni(btb)2Cl2] n (3). Compound 1 is comprised of a twofold interpenetrating 4-connected 65?·?8-CdSO4 3-D coordination network. Compounds 2 and 3 are neutral 2-D (4,4) networks with the ABAB?···?and ABCABC?···?stacking modes, respectively. The thermal stabilities of 1–3 were investigated. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(2):250-262
Four 1,3-bis(1,2,4-triazol-1-yl)propane (btp)-based transition metal complexes, {[Zn(btp)3] ?(ClO4)2} n (1), [Zn(btp)2(dca)2] n (2), [Zn(btp)(NCS)2] (3), and [Mn(btp)2(NCS)2] n (4), have been obtained by introducing small anionic coligands and structurally characterized by single crystal X-ray diffraction, elemental analysis, IR spectra, thermogravimetric curves, and solid luminescence spectra. Structural determinations reveal that the polymeric triple-stranded chain for 1 without coligand is changed into 1-D double-stranded chains for 2 and 4, and discrete binuclear structure for 3. Compared with 1, the mixed-ligand complexes are moderately destabilized for 2 and 4, and slightly enhanced for 3. Additionally, the four solid complexes exhibit strong emissions, suggesting their potential applications as luminescent materials. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(20):3609-3621
Four transition metal complexes, [Mn(Hbimtz)2(H2O)2(NCS)2] (1), [Co(Hbimtz)2(H2O)2(NCS)2] (2), [Pb(Hbimtz)Br2] n (3), and {[Ag2(Hbimtz)3]SO4?·?4H2O} n (4) (Hbimtz?=?1-[(1H-benzimidazol-2-yl)-methyl]-1,2,3,4-tetrazole), were synthesized and characterized by single-crystal X-ray diffraction. The Mn(II) of 1 and Co(II) of 2 are six-coordinate with two nitrogen atoms from Hbimtz, two nitrogen atoms from thiocyanate and two water molecules. The geometry of Pb(II) in 3 is a distorted octahedron with two nitrogen atoms of two Hbimtz's and four Br? ions, including the weak bond between the Pb1 and N6 of Hbimtz. Complex 3 is assembled into a 1-D [PbBr2] n inorganic chain by μ 2-Br? and into a 2-D layer by weak interactions. The Ag(II) of 4 has two geometries, linear and tetrahedral. Hbimtz bridges the two kinds of Ag(II) into a 1-D helical chain. Fluorescence of 3 and 4 were also investigated. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(18):2926-2934
Three new coordination polymers [Co(bimb)2(NCS)2] n (1), {[Co(bimb)2(dca)2]?·?CH3CN} n (2) and [Cu(bimb)2(NO3)2] n (3) (bimb?=?1,4-bis(imidazol-1-yl)butane, dca?=?dicyanamide) were synthesized and characterized. In 1, each Co(II) links two Co(II)'s by double bimb ligands and extends to form a one-dimensional chain containing the Co2(bimb)2 22-membered metallocycle. 2 and 3 are two-dimensional (4, 4) networks linked by bimb bridges. The conformations of the bimb ligands in 1, 2 and 3 are analyzed. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(3):413-423
Three coordination polymers containing Cd(II) and Co(II), connected via 4-[(3-pyridyl)methylamino]benzoate (L?), have been synthesized in hydrothermal conditions. In [Cd(L)Cl] n (1), adjacent Cd(II) cations are linked by carboxylates to give a dinuclear cluster. Pairs of L? bridge the dinuclear cluster to form double helical chains, and these chains are further linked by Cl? to produce a 4-connected net with (42?·?63?·?8) topology. [CdL2] n (2) contains 1-D ladder-like chains. The packing structure displays a 3-D supramolecular structure, with π?···?π interactions stabilizing the framework. [CoL2] n (3) has a 2-D extended supramolecular structure via π?···?π interactions of 1-D coordination polymers of 3. The crystal structures of 1–3 have been determined by single-crystal X-ray diffraction. Luminescent properties for 1 and 2 are discussed. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(9):1600-1609
Three coordination compounds, {[Co(btrp)2(H2O)2]?·?NO3?·?H2O} n (1), {[Co(btrp)2(H2O)2]?·?H2O?·?2H2btc} n (2), and {[Co(btrp)3]?·?2ClO4} n (3) (btrp?=?1,3-bis(1,2,4-triazol-1-yl)propane; H3btc?=?benzene-1,3,5-tricarboxylic acid), have been prepared via solvothermal method and characterized by single-crystal X-ray diffraction and elemental analyses. Compound 1 possesses a 1-D double-stranded chain composed of ribbons of 20-membered cycles. Binuclear water clusters link adjacent nitrate anions to form a 1-D supramolecular helix in the structure. Compound 2 has a 1-D double-stranded chain wherein free H2btc ligands constitute 1-D negative chains through classical hydrogen-bonding interactions (O–H?···?O). Compound 3 exhibits a triple-stranded 1-D chain. For 1–3, 3-D supramolecular structures are consolidated by interchain weak hydrogen-bonding interactions as well as electrostatic interactions. 相似文献
7.
《Journal of Coordination Chemistry》2012,65(13):2294-2303
Compounds [CdLCl2] n (1) and {[Cd(L)2(ClO4)]·ClO4} n (2), where L?=?1,3-bis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene, have been synthesized by hydrothermal method, and characterized by element analysis, IR spectra, Powder XRD, and X-ray crystallographic diffraction. Cd(II) in 1 and 2 are both trigonal bipyramidal. Different cadmium salts of chloride and perchlorate lead to different configurations of [Cd2L2]2+, trans-form in 1 but trans and cis-forms in 2. The 1-D beaded chains of 1 are further linked to generate a 3-D supramolecular architecture by strong π–π stacking interactions as well as intermolecular C–H?···?Cl hydrogen bonds. In 2, the 1-D beaded chains are further assembled by intermolecular C–H?···?O hydrogen bonds to form a 2-D layer. Solid-state fluorescent properties of 1 and 2 were investigated at room temperature. 相似文献
8.
《Journal of Coordination Chemistry》2012,65(14):2358-2366
Three new coordination polymers [Zn(btp)(NCS)2] n (1), {[Zn(btp)2(dca)2] n (2), and {[Zn(btp)3](BF4)2} n (3) (btp = 1,3-bis(1,2,4-triazol-1-yl)propane, dca = dicyanamide) were synthesized and characterized. In 1, 2, and 3, one-, double-, triple-btp ligands link two Zn(II) atoms and extend to form a 1-D zigzag chain for 1, 1-D double chain for 2, and 1-D triple chain for 3. The conformations of the btp ligands in 1, 2, and 3 are analyzed. 1, 2, and 3 have emission maxima at approximately 405, 407, and 409 nm, respectively, in the solid state at room temperature. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(15):2497-2510
Reactions of fresh M(OH)2 (M = Zn2+, Cd2+) precipitate and (RS)-2-methylglutaric acid (H2MGL), 2,2′-bipyridine (bipy), or 1,10-phenanthroline (phen) in aqueous solution at 50°C afforded four new metal–organic complexes [Zn2(bipy)2(H2O)2(MGL)2] (1), [Zn2(phen)2(H2O)(MGL)2] (2), [Cd(bipy)(H2O)(MGL)] · 3H2O (3), and [Cd(phen)(H2O)(MGL)] · 2H2O (4), which were characterized by single crystal X-ray diffraction, IR spectra, TG/DTA analysis as well as fluorescence spectra. In 1, the [Zn(bipy)(H2O)]2+ moieties are linked by R- and S-2-methylglutarate anions to build up the centrosymmetric dinuclear [Zn2(bipy)2(H2O)2(MGL)2] molecules. In 2, the 1-D ribbon-like chains [Zn2(phen)2(H2O)(MGL)2] n can be visualized as from centrosymmetric dinuclear [Zn2(phen)2(H2O)2(MGL)2] units sharing common aqua ligands. Both 3 and 4 exhibit 1-D chains resulting from [Cd(bipy)(H2O)]2+ and [Cd(phen)(H2O)]2+, respectively, bridged alternately by R- and S-2-methylglutarate anions in bis-chelating fashion. The intermolecular and interchain π···π stacking interactions form supramolecular assemblies in 1 and 1-D chains in 2–4 into 2-D layers. The hydrogen bonded lattice H2O molecules are sandwiched between 2-D layers in 3 and 4. Fluorescence spectra of 1–4 exhibit LLCT π → π* transitions. 相似文献
10.
Xiao-Yu Zhang Chao-Hong Su Hua-Yu Pang Qing Yu 《Journal of Coordination Chemistry》2017,70(21):3650-3659
Four Cu(I) complexes with 1-(2-hydroxyethyl)-5-mercapto-1H-tetrazole (Hhmt) as a ligand, [Cu(hmt)]n (1), [Cu2Cl(hmt)]n (2), [Cu4Br(hmt)3]n (3), and [Cu4I(hmt)3]n (4), have been synthesized. In 1–4, hmt adopts a μ4-η1?:? η1?:? ηS2 coordinate mode to join the adjacent Cu(I) ions, which form different two-dimensional (2-D) structures. In 1, the neighboring four Cu(I) atoms are connected by μ4-hmt to form a 2-D structure. In 2, the Cu(I) ions are firstly connected with Cl ions to form a 1-D [Cu4Cl2] subunit chain, which then have been bridged by hmt to form a 2-D structure. However, the inorganic [Cu4Br] and [Cu4I] motifs are respectively connected by hmt to form 2-D structures in isostructural 3 and 4. In addition, the fluorescent properties and the thermal stability properties of 1–4 have been investigated. 相似文献
11.
《Journal of Coordination Chemistry》2012,65(5):750-759
Three manganese coordination polymers [Mn(bimb)2(NCS)2] n (1), [Mn(bimb)2(dca)2] n (2) and [Mn(bimb)2(N3)2] n (3) (bimb?=?1,4-bis(imidazol-1-yl)butane, dca?=?dicyanamide) were synthesized and characterized by X-ray crystallography, IR and thermogravimetric analysis. In 1 and 2, each Mn(II) links two Mn(II) atoms by double bimb ligands and extends to form a one-dimensional double chain structure containing the Mn2(bimb)2 22-member metallocycle. 3 constructs a two-dimensional (4,4) network linked by bimb bridges. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(5):904-914
Four cobalt(II) coordination polymers, [Co2(oba)2(1,2-bix)2]n (1), [Co(oba)(1,3-bix)]n (2), {[Co4(oba)4(1,4-bix)4]·6H2O}n (3), and {[Co6(oba)6(1,4-bix)6]·2H2oba·3DMF·11H2O}n (4), where H2oba?=?4,4′-oxybis(benzoic acid), DMF = N,N-Dimethyl formamide, and 1,n-bix?=?1,n-bis(imidazol-l-yl-methyl)benzene (n?=?2, 3, 4), have been synthesized. These compounds were structurally characterized by single-crystal X-ray crystallography, IR spectroscopy, and thermogravimetric analysis. Compound 1 exhibits a 2-D nano square grid (4,4) network, while 2 features a 2-D structure with two distinct left- and right-handed helical chains. Compound 3 possesses a doubly interpenetrated double-layered framework structure. The structure of 4 is comprised of 1-D chains of rings. The structural differences reveal that the flexible dicarboxylate and neutral bis(imidazole) are effective building blocks in constructing coordination polymers with diverse architectures. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(2):286-297
Three new lead(II)-based coordination polymers, [Pb(5-OH-BDC)] n ?·?nH2O (1) (5-OH-BDC?=?5-hydroxyisophthalate), [Pb2(5-CH3-BDC)2] n (2), and [Pb2(5-CH3-BDC)2(phen)2] n ?·?2nH2O (3) (5-CH3-BDC?=?5-methylisophthalate, phen?=?1,10-phenanthroline), have been hydrothermally synthesized, structurally determined by single-crystal X-ray diffraction, and characterized by elemental analyses, IR spectra, and thermogravimetric analyses. Both 1 and 2 exhibit 2-D double-layer network structures, while 3 possesses 1-D chain structure bridged by 5-CH3-BDC. The coordination sphere of Pb(II) in 1 is holodirected, whereas in 2 and 3 the spheres feature hemidirected structures. Fluorescence properties of 1–3 have been investigated in the crystalline state at room temperature. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(2):244-255
A series of new coordination compounds with 1-carboxymethylpyridinium-4-benzoate (L) and transition metal ions have been synthesized. They are formulated as [M(L)2(H2O)4]?·?4H2O M=Mn (1) and Co (2), {[M(L)2]?·?xH2O} n M=Mn, x?=?1 (3); M=Co, x?=?2 (4), and M=Cu, x?=?3 (5). In 1 and 2, the zwitterionic dicarboxylate ligand is monodentate through only one carboxylate to generate mononuclear molecules. The molecules are assembled through O–H?···?O interactions to give 3-D pillared layer-like architectures, in which interesting 1-D tape-like hydrogen bonding motifs are connected into 2-D layers via carboxylate-mediated hydrogen bonds. In 3–5, the organic ligands serve as bridges with one carboxylate monodentate and the other chelating, and the metal ions are linked by double bridges to give 1-D polymeric chains, which are zigzag (3) or stair-like (4 and 5) due to the cis or trans coordination geometry around metal ions. The chains are further stabilized and associated into 3-D architectures through intra- and interchain hydrogen bonding and/or π–π stacking interactions. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(13):2296-2306
Two cadmium(II) coordination polymers, [Cd(2-mBIM)(NCS)(SCN)] n (1) and [Cd2(2-mBIM)2(NO3)2(C4H4O4)(H2O)5] n (2) (2-mBIM = bis(2-methylimidazo-1-yl)methane, C4H4O4= succinate), have been synthesized and characterized by X-ray diffraction. Complex 1 crystallizes in the triclinic space group P 1 with a = 9.0770(5) Å, b = 9.4043(4) Å, c = 19.8720(9) Å, α = 101.551(1)°, β = 93.498(1)°, γ = 108.484(1)°, V = 1562.02(13) Å3, and Z = 2. Each Cd(II) is octahedrally coordinated and connected with two adjacent Cd(II)'s by double end-to-end thiocyanate bridges, resulting in the formation of 1-D zigzag chains, linked to each other via bridging 2-mBIM giving a 2-D supramolecular framework. Complex 2 crystallizes in the monoclinic space group P2(1)/n with a = 12.6543(6) Å, b = 7.7128(4) Å, c = 17.3089(9) Å, β = 109.3980(10)°, V = 1593.45(14) Å3, and Z = 2. Cd(II) is coordinated with oxygen and nitrogens from two independent 2-mBIM, in a cis-configuration to form a 1-D helical structure. A 3-D supramolecular network comprised of succinate anion bridged 1-D helical chains, and weak hydrogen bonds between dimer waters gave 2-D layers. 相似文献
16.
Yan-Qiu Yang Cheng-Fu Su Jun-Di Zhang Gui-Yang Zhang 《Journal of Coordination Chemistry》2016,69(24):3762-3775
Three new Cd(II) complexes incorporating both 2-(1H-imidazol-1-methyl)-1H-benzimidazole (imb) and 1,4-benzenedicarboxylate (bdic2?), [CdCl(bdic)1/2(imb)2]n (1), {[Cd(bdic)(imb)(H2O)]·DMF·2H2O}n (2), and [Cd(bdic)(imb)]·3H2O}n (3), have been prepared and structurally characterized by single crystal X-ray diffraction. Bdic2? anions connect the?Cd-imb-Cd-imb?chains leading to a 2-D structure of 1. Bdic2?(A) and bdic2?(B) anions link the binuclear [Cd2(imb)2(H2O)2] units forming a 2-D structure of 2. Complex 3 features a 2-D structure involving supramolecular “double-layer” motifs. IR spectra and thermogravimetric curves are consistent with the results of the X-ray crystal structure analysis; 1–3 exhibit good fluorescence in the solid state at room temperature. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(24):4375-4388
Four new fpa-metal complexes, [Co(fpa)2(H2O)2] (1), [Cu(fpa)2(H2O)] (2), [Zn2(fpa)4(bpp)2] n (3), and {[Zn(bpy)(H2O)4]?·?2(fpa)} n (4), have been synthesized and fully characterized by elemental analyses, IR spectroscopy, single-crystal X-ray diffraction, and thermogravimetric analysis (TGA), (Hfpa?=?2,2-difluoro-2-(pyridine-2-yl)acetate, bpp?=?1,3-bis(4-pyridyl)propane, bpy?=?4,4′-bipyridine). X-ray diffraction analyses reveal that 1 and 2 with 0-D structures are both extended into 3-D supramolecular networks through hydrogen bonds and π···π interactions. Complex 3 with chiral centers possesses a 1-D structure constructed by two kinds of bpp molecules and four kinds of fpa? molecules with different conformations, with bbp and fpa? bridging and capped ligands, respectively. In 4, bpy links [Zn(H2O)4]2+ into a 1-D polymeric cationic chain and uncoordinated fpa? compensates the framework charge. The results of TGA reveal that fpa? decomposes through two processes. Both 3 and 4 show strong fluorescence in the solid state at room temperature. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(15):2692-2704
Four new compounds, [Mn(HL)(phen)2(H2O)] (1), [Ni(HL)(phen)2(H2O)] (2), [Zn(HL)(4,4′-bipy)1.5(H2O)] n ?·?2nH2O (3) and [Zn2(HL)2(H2O)6] (4), have been synthesized from an asymmetric semi-rigid V-shaped multicarboxylate 4-(4-carboxy-phenoxy)-phthalic acid (H3L) with 1,10-phenanthroline (phen), or 4,4′-bipyridine (4,4′-bipy) as auxiliary ligands. Single-crystal X-ray diffraction analysis reveals that 1, 2 and 4 have 0-D structures with 3-D supramolecular frameworks formed by intermolecular hydrogen bonds. Compound 3 shows a 1-D infinite ribbon bridged by 4,4′-bipy, which further forms a 3-D supramolecular architecture by π–π stacking interactions and hydrogen bonds. Thermal stabilities of 1–4 and luminescence properties of 3 and 4 have also been investigated. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(5):760-767
A tetradentate N-donor ligand 1,4-bis[2-(2-pyridyl)benzimidazolato]butane (L) was prepared for construction of a coordination framework. Three one-dimensional coordination polymers {[M(II)L(NCS)2](DMF)2} n (M(II) = cadmium(II), 1, zinc(II), 2, manganese(II), 3) were obtained by reaction of metal ions and L in the presence of KSCN in DMF/water. The complexes are isostructural and consist of 1D zigzag [M(II)L(NCS)2] n chains and DMF molecules. Within the chains, the metal atoms are each octahedrally coordinated by four N atoms of L and two N atoms of the SCN? anions. Complexes 1 and 2 in the solid state at room temperature exhibit intense photoluminescence at 453 and 433 nm, respectively. 相似文献
20.
Xiu Juan Shi Peng Yun Chen Ming Ze Wu Dong Chen Cai 《Journal of Coordination Chemistry》2018,71(7):1063-1072
Hydrothermal reactions of 1,3-bis(1,2,4-triazol-1-yl)benzene (btb) and M(NO3)2 (M = Co2+ (1), Cu2+ (2)) afforded two new coordination polymers, [Co(btb)2(NO3)(H2O)]n·NO3·H2O (1) and [Cu(btb)2(NO3)2]n (2), respectively. Single-crystal X-ray diffraction reveals that 1 crystallizes in the space group P21/m and 2 crystallizes in the space group Pī, both showing a double-stranded chain structure. The 1-D chains are interconnected via π?π interactions to lead to 2-D ladder-like supramolecular architectures. In addition, magnetic behavior and thermal stability of 1 and 2 have been investigated. For 1, weak antiferromagnetic interactions are observed at low temperature, and the data obey the Curie–Weiss law χM = C/(T?θ), with C = 3.22 cm3·mol?1·K and θ = ?10.39 K. For 2, the decrease of the χT vs. T curve at low temperature is the result of intermolecular antiferromagnetic magnetic interactions. 相似文献