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1.
Two new coordination polymers, [Co2(L)1.5(OH)(H2O)2]·2H2O (1) and [CoL(bpp)] (2) (H2L = 2,5-dibenzoylterephthalic acid and bpp = 1,3-bis(4-pyridyl)propane), have been synthesized and characterized by elemental analyses, IR spectra, and thermogravimetric analyses. Their structures were determined by single crystal X-ray diffraction analyses. Complex 1 exhibits a 3D framework assembled from tetra-nuclear cobalt-oxygen bridged by carboxylic O atoms with a (412·63) topology. Complex 2 possesses a 2D layered structure which extends into a 3D architecture via C–H···π interaction between propane proton and the phenyl ring or pyridine ring of an adjacent sheets. Furthermore, the magnetic properties of them are discussed. 相似文献
2.
3.
Three new coordination polymers, namely, [ML(H2O)]n (M = Co (1), Zn (2)) and [CuL(DMF)]n (3), have been hydrothermally synthesized through the reaction of bifunctional ligand 5-((2-methyl-1H-imidazol-1-yl)methyl)benzene-1,3-dioic acid (H2L) with divalent cobalt, zinc and copper salts, and structurally characterized by elemental analysis, IR and X-ray diffraction. Both complexes 1 and 2 are two-fold interpenetration 3D frameworks. Complex 3 exhibits (3,6)-connected framework with (4.62)2(42.610.83) topology. Furthermore, UV–vis absorption spectra and powder X-ray diffraction (PXRD) were investigated as well. 相似文献
4.
The assembly of a semirigid tridentate N-donor ligand with Cd(II) ions afforded two novel coordination polymers, [Cd(tipa)(H2O)2·2NO3·2DMF·H2O]n (1), [Cd2(tipa)2Cl4·2DMF·6H2O]n (2), where tipa = tris(4-(1H-imidazol-1-yl)phenyl) amine. Structural analyses indicate that the two compounds feature 2D layered networks. A 3-connected uninodal net with point symbol of (82·10) is constructed in compound 1 by the connection of tipa and metal ions, in which the terminally coordinated water molecules prevent further extension of the layer. Compound 2 features [Cd2Cl4] motifs, which are bridged by tridentate tipa ligands into a 2D (3,6)-connected layer. The results show that tipa with different dihedral angles between benzene ring and terminal imidazole groups can act as versatile building blocks for the generation of various networks. Moreover, the photoluminescence properties of 1 and 2 in the solid state at room temperature have been investigated. 相似文献
5.
《Inorganic chemistry communications》2005,8(8):746-750
Two new helical Cu(II) coordination polymers, [Cu(2,2′-bpy)(Hsgly)]Cl · 2H2O(H2sgly = N-(2-hydroxylbenzyl)glycine) (1) and [Cu(2,2′-bpy)(Hsala)](NO3) · 2H2O(H2sala = N-(2-hydroxylbenzyl)-l-alanine) (2) were synthesized. Single crystal X-ray diffraction analysis indicated that both complexes showed helical chains arrangement of Cu(II) centers bridged by carboxyl groups. The magnetic measurements showed complex 1 exhibited ferromagnetic interaction while there was no interaction between the Cu(II) centers in complex 2. 相似文献
6.
《Inorganic chemistry communications》2007,10(9):1117-1120
Two azido-bridged coordination polymers, [Ni(L)(μ1,1-N3)2] (1) and [Cu(L)(μ1,1,3-N3)(N3)] (2) (L = 1,2-diaminocyclohexane), have been synthesized and characterized by elemental analyses, IR spectra and X-ray structural analyses. Complex 1 is a one-dimensional helical chain coordination polymer with both azides as μ1,1-bridge, which exhibits interesting wheel motif. Complex 2 shows two-dimensional layer network in which an azide acts as μ1,1,3-bridge and the other azide as monodentate ligand. Cyclic voltammogram gives quasi-reversible redox wave of Cu(II)/Cu(I) pair. Variable-temperature magnetic property of 1 was investigated, which shown strong ferromagnetic interaction arising from the μ1,1-azido bridging nickel(II) chains. 相似文献
7.
Two coordination polymers containing Ag(I) atoms, {[Ag(3-pia)](PF6)}n (1) and {[Ag(3-pia)2](PF6)}n (2) (3-pia = N-pyridin-3-yl-isonicotinamide), have been synthesized using different solvents, and characterized by single X-ray analyses. In compound 1, Ag(I) atoms are linearly coordinated by two 3-pia ligands, resulting in one-dimensional chains. On the other hand, in compound 2, Ag(I) atoms are tetrahedrally coordinated by four 3-pia ligands, resulting in two-dimensional sheets. 相似文献
8.
Three coordination polymers [Cu2(obtz)2(tdc)2]n (1), {[Cu(obtz)2(H2O)2][Cu2(obtz)2(sip)2]5.5H2O}n (2) and [Cu(obtz)(nip)]n(3) were synthesized by the hydrothermal reaction (obtz = 1.2-bis(1,2,4-triazol-1-ylmethyl)benzene, tdc = 2.5-thiophenedicarboxylate, sip = 5-sulfoisophthalate, nip = 5-nitroisophthalate). 1 shows a ladder-like one-dimensional chain with two side arms. 2 is comprised of two distinct and crystallographically independent polymeric motifs. The first motif in 2 is the ladder-like one-dimensional anionic chain with two side arms. The second motif in 2 is the cationic chain. 3 exhibits the intriguing 2-fold interpenetrated network based on the undulated 2D (4.4) network. 1, 2 and 3 are good photocatalysts for the degradation of methyl orange (MO) under UV irradiation. 相似文献
9.
Two entangled coordination polymers [Cd2(bib)(bdc)2]n (1) and [Cd2(bib)(bda)2]n (2) were synthesized by the hydrothermal reaction (bib = 1,4-bis(2-methyl-imidazol-1-yl)butane, bdc = 1,2-benzenedicarboxylate, bda = 1,4-benzenediacetate). 1 exhibits an unusual 6-connected self-catenated 3D network based on Cd2(COO)2 dimer with the point symbol of (44·610·8). 2 exhibits a 3-fold interpenetrating 3D pcu network based on Cd2(COO)2 dimer. The different conformations of bib ligands (the anti–anti–anti conformation in 1 and gauche–anti–gauche conformation in 2) play the key role in the construction of different structures in 1 and 2. The luminescence and thermal stability were investigated. 相似文献
10.
Bo Liu Ru-Qiang Zou Rui-Qin Zhong Song Han Hiroshi Shioyama Tetsuya Yamada Goro Maruta Sadamu Takeda Qiang Xu 《Microporous and mesoporous materials》2008,111(1-3):470-477
Two isostructural coordination polymers M3(NDC)3(DMF)4 (M = Co (1), Mn (2); H2NDC = 2,6-naphthalenedicarboxylic acid; DMF = N,N′-dimethylformamide) were prepared through conventional and microwave-assisted solvothermal methods. Single crystal X-ray analysis indicated that both complexes crystallized in the monoclinic system with space group C2/c. Powder X-ray diffraction (PXRD) patterns of the bulk samples for the two complexes obtained from microwave-assisted solvothermal syntheses matched well with the simulated ones from the single crystal data as well as the ones prepared by conventional solvothermal method. These microporous cobalt(II) and manganese(II) coordination polymers undergo reversible structural change upon desolvating, giving stable microporous frameworks containing unsaturated metal sites, and resolvating. The desolvated complexes showed different nitrogen gas adsorption capabilities but very close hydrogen adsorption behaviors. Variable-temperature magnetic susceptibilities of 1 and 2 revealed the weak antiferromagnetic coupling between the adjacent metal ions bridged by carboxylate. 相似文献
11.
In this article, four new lead(II) coordination polymers based on a N,O-donor ligand 2′-(1 H-1,3,7,8-tetraaza-cyclopenta[l]phenanthren-2-yl)biphenyl-2-carboxylic acid (HL) have been hydrothermally synthesized, namely, [PbL2]·2H2O (1), [PbL2]·2H2O·CH3CH2OH (2), [Pb5L2(m-BDC)4]·3H2O (3) and [Pb2L2(p-BDC)] (4), where m-BDC = 1,3-benzenedicarboxylate and p-BDC = 1,4-benzenedicarboxylate. Compound 1 shows a 2D bilayer structure, which is further extended into a 3D supramolecular structure through π–π stacking interactions. Compound 2 shows a 3D supramolecular structure based on a zero-dimensional molecule by π–π stacking interactions of neighboring molecules. Compound 3 shows a 2D layer structure. Compound 4 displays a 1D chain-like structure, which is then stacked by π–π interactions to result in a 2D supramolecular structure. Solid-state luminescent spectra of four lead(II) complexes indicate intense fluorescent emissions. 相似文献
12.
Yao Chen Shi-Yuan Zhang Xiao-Qing Zhao Jing-Jing Zhang Wei Shi Peng Cheng 《Inorganic chemistry communications》2010,13(6):699-702
The reactions of Fe(II) salts with 1,4-bis(1,2,4-triazole-1-ylmethyl-benzene) (btx) give two new Fe(II) coordination polymers {[Fe(btx)3](ClO4)2}n (1) and {[Fe(btx)(SO4)(H2O)2]}n (2), which have been characterized by element analysis, PXRD, single-crystal X-ray diffraction and magnetic susceptibility. 1 shows infinite plait-like chain structure, while 2 exhibits as 2D grid. Magnetic studies indicate that the Fe(II) ions in the two coordination polymers retain in high-spin ground state upon cooling from 300 to 2 K, showing antiferromagnetic interactions. 相似文献
13.
Two new coordination polymers, |DMF|[Zn2(C7N2O4H6)2(C10N2H8)] (1) and |(H2O)3|[Co(C8N2O4H9)2(H2O)2] (2) have been synthesized based on 2-ethyl-1H-imidazole-4,5-dicarboxylic acid (H3EtImDC) and 2-propyl-1H-imidazole-4,5-dicarboxylic acid (H3PrImDC) as organic ligands, respectively. Single-crystal X-ray diffraction analysis reveals that compound 1 is a two dimensional layered structure constructed from two types of six-membered metallocycle, and the layers are stacked in an –ABCABC– sequence. For 2, the mononuclear [Co(C8N2O4H9)2(H2O)2] molecules are connected with each other through hydrogen bonds forming a three dimensional supermolecular structure. Further characterizations including elemental analyses, IR spectra, and thermogravimetric analyses have been studied. 相似文献
14.
Two novel Cd(II) coordination frameworks based on a semirigid asymmetric ligand L and aromatic multi-carboxylate ligands, {[Cd2L(btc)(H2O)2]·5H2O}n (1) and [Cd2L2(bdc)]n (2) (L = (4-((2-(pyridine-2-yl)-1H-imidazol-1-yl)methyl)benzoic acid, H3btc = 1,3,5-benzenetricarboxylic acid, H2bdc = 1,3-benzenedicarboxylic acid), have been hydrothermally synthesized, and structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography. Due to various coordination modes and conformations of the semirigid asymmetric ligand, and carboxylate containing co-ligands, therefore, the two complexes exhibit structural and dimensional diversity. Complex 1 exhibits a novel 2D (3, 5)-connected network structure with (3·52)(32·53·64·7) topology. Complex 2 exhibits a novel 3D CdSO4 topology, which is formed from different dinuclear cadmium units. In addition, the photoluminescence properties of the free ligand L, and complexes 1 and 2 were studied in the solid state at room temperature. 相似文献
15.
Two coordination polymers {[Cu4(OH)2(btrb)2(btc)2]·4H2O}n (1) and {[Cd2(btrb)(adc)2(H2O)]·H2O}n (2) were synthesized with hydrothermal method and characterized (btrb = 1,4-bis(1,2,4-triazol-4-ylmethyl)benzene, btc = 1,3,5-benzenetricarboxylate, adc = 1,3-adamantanedicarboxylate). 1 shows an unusual (3,10)-connected two-dimensional metal–organic framework based on the tetranuclear copper(II) cluster [Cu4(μ3-OH)2]. 2 is an interesting three-dimensional network based on the one-dimensional metal–organic nanotube. 1 shows good photocatalytic activity for the degradation of methyl blue (MB). The luminescence of 2 was investigated. 相似文献
16.
Hydrothermal reactions of CdCl2·2.5H2O with 3,6-bis(imidazol-1-yl)carbazole (bmcz), 2-amine-1,4-benzenedicarboxylic acid (2-NH2-1,4-H2BDC) or 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) afforded two coordination polymers, [Cd(2-NH2-1,4-BDC)(bmcz)]n (1) and [Cd(1,4-NDC)(bmcz)]n (2). Complexes 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 and 2 are isomorphic and exhibit 3D supermolecular structures. The solid state luminescent and optical properties of 1 and 2 at ambient temperature were also investigated. A comparative study on their photocatalytic activity toward the degradation of methylene blue in polluted water was explored. 相似文献
17.
《Inorganic chemistry communications》2008,11(10):1110-1112
Two new cadmium diphosphonate complexes, namely, Cd2(H2O)2[(C5H5N)CH2C(OH)(PO3)(PO3H)]2 1 and Cd2(H2O)(Cl)[(C5H5N)CH2C(OH)(PO3)2] 2, based on [1-hydroxy-2-(3-pyridyl)-ethylidene]-bis-[phosphonic acid] monosodium salt have been synthesized under hydrothermal reaction and characterized by single crystal X-ray diffraction. Both complexes show strong fluorescence emission in contrast to the free ligand, respectively, in solid state at ambient temperature. 相似文献
18.
Two new 3-D Cd(II) coordination polymers (CPs) with 3,5-bi(4-carboxyphenoxy)-benzoic acid (H3L), namely [Cd3(L)2(H2O)4]·4H2O (1) and [Cd3(L)2(H2O)3]·2H2O (2), were successfully synthesized under hydrothermal condition at 140 °C and 180 °C, respectively. Complex 1 is constructed from 1-D (–Cd–O–)∞ rod-shaped SBUs (secondary building units) and ‘Y’-shaped L ligands. In complex 2, the 3-D network is mediated by 2-D [Cd(COO)2]n layered motifs and ‘T’ and ‘Y’-shaped L ligands. The results show that the reaction temperature plays a key role on the final structures of the complexes. The luminescent properties of the complexes have also been investigated. 相似文献
19.
Reactions of Co(II) with 5-(3-(1H-imidazol-1-yl)phenyl)-1H-tetrazolate (HIPT) resulted in three Co(II) coordination polymers (CPs), namely, {[Co(IPT)2(H2O)2]·2H2O}n (1), [Co(IPT)2]n (2), and {[Co3(IPT)2(CH3COO)2(OH)2(H2O)2]·2H2O}n (3). Compound 1 that obtained from CoCl2·6H2O at 120 °C is a 2D network based on Co(II) ions and μ2-IPT− ligands. Compound 2 that obtained from CoCl2·6H2O at 170 °C exhibits a 3D framework based on linear trinuclear Co(II) SBUs and features a pcu network topology. Compound 3, which obtained by using Co(Ac)2 as salt, displays a 2D network based on 1D SBUs. The structures of compounds 1–3 are dependent on the temperatures and inorganic anions. The magnetic properties of compounds 2–3 were also explored. 相似文献
20.
Three new coordination polymers [Zn(Htip)Cl(H2O)]n (1), [Zn(Htip)2]n (2) and [Cd(Htip)2]n·2nH2O (3) were synthesized by reactions of Zn(II)/Cd(II) salts with a multidentate tetrazole-based ligand 2-(4-(tetrazol-5-yl)phenyl)imidazo(4,5-f)(1,10)phenanthroline (H2tip). Complex 1 possesses an infinite 1D coordination chain, and further forms the final 3D supramolecule through π⋯π stacking interactions. Complexes 2 and 3 are isomorphous, and both of them feature an 8-fold interpenetrating 4-connected 3D framework with the dia topological net and the Schläfli symbol of {66}. In 1–3, the Htip− ligand links two metal centers through three terminal N-donors. The structural analyses indicate that the anions and solvents can subtly influence the formation of the resulting network. Moreover, the thermal stabilities and photoluminescent properties of 1–3 are investigated in the solid state. 相似文献