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1.
以4-(2-(4-咪唑)苯乙烯基)吡啶(ISPE)为配体,分别与间苯二甲酸(1,3-H_2BDC)、4,4′-联苯二甲酸(4,4′-H_2BPDC)和4,4′-二苯乙烯二甲酸(4,4′-H_2STDC)及过渡金属盐Cd(NO3)2·4H_2O通过溶剂热自组装形成了3种配位聚合物晶体{[Cd_2(ISPE)_2(1,3-BDC)_2]·DMF}_n(1)、[Cd(ISPE)(4,4′-BPDC)]_n(2)和[Cd(ISPE)_2(4,4′-STDC)(H_2O)_2]_n(3)。并用单晶X射线衍射、PXRD、红外光谱、元素分析、热重等对其进行了表征。单晶解析结果表明:配位聚合物1是二维层状网格结构,配位聚合物2是一个六重穿插的类金刚烷三维网格结构,配位聚合物3是由一维网格结构通过氢键和分子间作用力堆积形成的三维网格结构。另外还研究了它们的室温固态荧光性能。  相似文献   

2.
Solvothermal reactions of CdCl2·2.5H2O with 4,4′-bis(benzoimidazol-1-yl)bibenzene (bimbb) and 1,4-benzenedicarboxylic acid (1,4-H2bdc), 4,4′-biphenyldicarboxylic acid (4,4′-H2bpdb), 5-methyl-1,3-benzenedicarboxylic acid (5-Me-1,3-H2bdc), or 1,3,5-benzenetricarboxylic acid (H3btc) afforded four 3-D metal–organic frameworks, {[Cd2(1,4-bdc)2(bimbb)2]·H2O}n (1), {[Cd2(4,4′-bpdb)2(bimbb)(H2O)2]} n (2), [Cd2(5-Me-1,3-bdc)2(bimbb)] n (3), and {[Cd3(btc)2(bimbb)(H2O)2]·2H2O} n (4). Complexes 1–4 were characterized by elemental analysis, IR spectroscopy, powder X-ray powder diffraction, and single-crystal X-ray diffraction. 1 possesses a 3-D framework with 2-D undulated (8,4) layers which are further connected by bimbb pillars. 2 forms a 3-D pillared-layer framework constructed through 2-D undulated (4,4) layers and bimbb pillars. 3 has 1-D ribbons of [Cd4(5-Me-1,3-bdc)4] n which are linked by bimbb to form a 3-D structure. 4 exhibits a 3-D pillared-bilayer framework consisting of (6,3) double-decker [Cd9(btc)6(μ-OH2)6] n layers and bimbb pillars. The Schläfli symbols for the four frameworks are (42·63·8)(42·65·83) (1), (44·66) (2), (44·62)(46·64) (3), and (63)(610) (4). The photoluminescent properties of 1–4 were also investigated.  相似文献   

3.
Under hydrothermal conditions, in the presence of H2BDC, the self-assembly of CdCl2, H2ip or H2NDC at pH = 7 generated two Cd(II)-containing coordination polymers, Cd6(ip)6(μ-H2O)4·H2O (1) and Cd2(NDC)2(μ-H2O)2 (2) (H2BDC/H2ip/H2NDC = 1,4/1,3/1,2-benzenedicarboxylic acid). The structures are 2D metal-organic frameworks constructed from Cd-O-C rod-shaped SBUs (Secondary Building Units). Crystal samples in the solid state display strong fluorescence at 335 and 343 nm.  相似文献   

4.
The reactions of m-H2BDC, NaOH with Cd(NO3)2?·?4H2O and Co(NO3)2?·?4H2O (m-BDC?=?1,3-benzene-dicarboxylate) in DMF gave two isostructural three-dimensional (3D) heterometallic coordination polymers: [CdNa(m-BDC)2]?·?[NH2(CH3)2] (1) and [CoNa(m-BDC)2]?·?[NH2(CH3)2] (2), respectively. The compounds were characterized by single-crystal X-ray diffraction, X-ray powder diffraction, ICP, TGA, IR, and photoluminescence spectroscopy. The crystal structures were determined by X-ray diffraction and refined by full-matrix least-squares methods to R?=?0.0221 and wR?=?0.0579 using 1925 reflections with I?>?2σ(I) for 1; and R?=?0.0654 and wR?=?0.1591 using 1881 reflections with I?>?2σ(I) for 2. Their frameworks are constructed from M–O–C (M?=?Na, Cd and Co) chains composed of alternating six-coordinate Na(I) centers and four-coordinate Cd(II) or Co(II) centers. These chains are further linked by m-BDC to form unusual 3D open-framework structures.  相似文献   

5.
Three new coordination polymers based on 2-ethyl-imidazole-4,5-dicarboxylate with 1,10-phenanthroline as ligands, Pb(HEIDC)(phen)2 (1), [Zn(EIDC)(phen)] n (2), and {[Ba(H2EIDC)2(phen)]?·?(phen)2?·?[Ba(H2EIDC)(HEIDC)(phen)]} n (3) (H3EIDC?=?2-ethyl-1-Himidazole-4,5-dicarboxylate; phen?=?1,10-phenanthroline), have been synthesized under hydrothermal conditions and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. Complex 1 displays a tetranuclear square constructed of four Pb(II) centers, four HEIDC, and eight phen, resulting in a 3-D network with a 1-D open channel along the c-axis via C–H?···?O hydrogen bonds, C–H?···?π, and π–π stacking interactions. Complex 2 is an infinite zigzag chain resulting in the final 3-D supramolecular framework via C–H?···?O and π–π stacking interactions. Complex 3 is composed of two individual Ba chains, exhibiting a 3-D framework via O–H?···?O, O–H?···?N hydrogen bonds, and π–π stacking interactions. The photoluminescence spectra of 1 and 2 in the solid state have been investigated, 1 exhibits green photoluminescence in the solid state at room temperature.  相似文献   

6.
Four coordination polymers, [Ag(L1)](m-Hbdc) (1), [Ag(L1)]2(p-bdc)?·?8H2O (2), [Ag(Hbtc)(L1)][Ag(L1)]?·?2H2O (3) and [Ag2(L2)2](OH-bdc)2?·?4H2O (4), where L1?=?1,1′-(1,4-butanediyl)bis(imidazole), L2?=?1,2-bis(imidazol-1-ylmethyl)benzene, m-H2bdc?=?1,3-benzenedicarboxylic acid, p-H2bdc?=?1,4-benzenedicarboxylic acid, H3btc?=?1,3,5-benzenetricarboxylic acid, and OH–H2bdc?=?5-hydroxisophthalic acid, were synthesized under hydrothermal conditions. Compound 1 contains a–Ag-L1–Ag-L1–chain and a hydrogen-bonding interaction induced–(m-Hbdc)-(m-Hbdc)–chain. Compound 2 consists of two independent–Ag-L1–Ag-L1–chains. P-bdc anions are not coordinated. Hydrogen bonds form a 3D supramolecular structure. A novel (H2O)16 cluster is formed by lattice water molecules in 2. Compound 3 contains a–Ag-L1–Ag-L1–and a–Ag(Hbtc)-L1–Ag(Hbtc)-L1–chain. The packing diagram shows a 2D criss-cross supramolecular structure, with?π?···?π?and C–H ···?π?interactions stabilizing the framework. Compound 4 contains a [Ag2(L2)2]2+ dimer with hydrogen-bonding,?π?··· π, and Ag ··· O interactions forming a 3D supramolecular framework. The luminescent properties for these compounds in the solid state are discussed.  相似文献   

7.
Four coordination polymers, [Zn(o-bdc)(bth)0.5(H2O)] n (1), [Cd(o-bdc)(bth)0.5(H2O)] n (2), [Zn(m-bdc)(bth)] n (3), and [Cd(p-bdc)(bth)?·?(H2O)2] n (4) (where o-bdc?=?1,2-benzenedicarboxylate, m-bdc?=?1,3-benzenedicarboxylate, p-bdc?=?1,4-benzenedicarboxylate, and bth?=?1,6-bis(triazol)hexane), have been hydrothermally synthesized and structurally characterized. Both 1 and 2 are isostructural, featuring two binodal architectures: (63)(65·8) topology in terms of o-bdc and ZnII/CdII as three- and four-connected nodes. Complex 3 shows a 2-D (4,4) network with the Zn?···?Zn?···?Zn angle of 57.84°, whereas 4 exhibits planar 2-D (4,4) network. These 2-D networks of 3 and 4 are extended by supramolecular interactions, such as CH?···?π/π–π stacking and hydrogen-bonding into 3-D architecture. A structural comparison of these complexes demonstrates that the dicarboxylate building blocks with different dispositions of the carboxyl site play a key role in governing the coordination motifs as well as 3-D supramolecular lattices. Solid-state properties such as photoluminescence and thermal stabilities of 14 have also been studied.  相似文献   

8.
Three transition metal coordination complexes, {[Co(2,4-DCP)2(μ 2-H2O)(H2O)2]?·?(H2O)2} n (1), [Zn(2,4-DCP)(IN)] n (2), and [Mn2(2,4-DCP)3(DMPY)2(μ 2-H2O)(H2O)]?·?(2,4-DCP)?·?0.2(H2O) (3) (2,4-DCP?=?2,4-dichlorophenoxyacetate, IN?=?isonicotinate, DMPY?=?5,5′-dimethyl-2,2′-bipyridine), have been prepared under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. Complex 1 displays a 1-D chain through cobalt and bridging water molecules with Co?···?Co distance of 4.028(2)?Å. Complex 2 shows a 2-D (4,4) net, which is extended into a 3-D supramolecular framework by weak hydrogen-bonding interactions. Complex 3 consists of discrete dinuclear cations, 2,4-DCP counter ions and free water molecules, which are assembled into a packing structure through π?···?π stacking of inversion-related DMPY ligands and hydrogen bonds. Magnetic susceptibility measurements show weak antiferromagnetic interactions in 1. The photoluminescence and lifetime of 2 in the solid state have also been studied.  相似文献   

9.
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 13 have been investigated in the crystalline state at room temperature.  相似文献   

10.
Two new coordination polymers formulated as {[Zn(bdic)(bmt)H2O]?·?0.5H2O} n (1) and {[Cd(bdic)(bmt)(H2O)2]?·?2H2O} n (2) (H2bdic?=?1,3-benzenedicarboxylic acid, bmt?=?1-((benzotriazol-1-yl)methyl)-1-H-1,2,4-triazole) have been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. Both coordination polymers exhibit 1-D chain structure where bmt is unidentate and bdic2? bridging. In 1, bmt hangs at two sides of the main chain, whereas bmt hangs at one side of the main chain in 2. Fluorescent properties have also been determined.  相似文献   

11.
The aim of this study was to explore the influence of the position and angles of carboxyl groups of polycarboxylates on constructing coordination polymers. Three Co(II) metal–organic coordination polymers based on a tri-pyridyl-bis-amide ligand, namely [Co(L)(1,2-BDC)(H2O)2]·2H2O (1), [Co(L)(1,4-BDC)(H2O)2]·2H2O (2) and [Co(L)2(BTEC)0.5]·H2O (3) (L = N,N′-bis(pyridine-3-yl)pyridine-2,6-dicarboxamide, 1,2-H2BDC = 1,2-benzenedicarboxylic acid, 1,4-H2BDC = 1,4-benzenedicarboxylic acid, H4BTEC = 1,2,4,5-benzenetetracarboxylic acid), have been obtained by tuning the auxiliary polycarboxylate ligands. Structural analyses reveal that complexes 13 display diverse structures. Complex 1 displays a meso-helical chain linked by L ligands, which is further extended into a three-dimensional supramolecular framework through hydrogen-bonding interactions. The 1,2-BDC with a chelating coordination mode only acts as the hydrogen bond acceptor. In complex 2, the 1,4-BDC anions connect adjacent Co(II) atoms to form a linear chain, which is connected by hydrogen-bonding interactions to construct a 3D supramolecular network. Complex 3 exhibits a chain, which is composed of left-/right-handed Co-L helical chains and Co-BTEC linear chain. The 1D chains are ultimately extended into a two-dimensional supramolecular network by hydrogen-bonding interactions. Moreover, the thermal stability and the fluorescent properties of the title complexes and the electrochemical behaviors of a bulk-modified carbon paste electrode with complex 2 have been investigated at room temperature.  相似文献   

12.
Three zinc(II) benzenedicarboxylate coordination polymers, {ZnII(L1)(phen)(H2O)} n (1), {[ZnII(L2)(phen)]2} n (2), and {[ZnII(L3)(phen)(H2O)]} n (3) (L1?=?1,4-benzenedicarboxylic dianion, L2?=?1,3-benzenedicarboxylic dianion, L3?=?1,2-benzenedicarboxylic dianion, and phen?=?1,10-phenanthroline), have been synthesized by self-assembly. Structural analyses of 13 reveal that the compounds are one-dimensional (1-D) chains. However, the structural motifs for 13 are distinct from each other, where 1 forms 1-D zig-zag chains, 2 is in 1-D ladder-like motif, and 3 is a 1-D helical form. Compounds 13 exhibit photoluminescence with emission maxima at ca 371, 392, and 375?nm, respectively.  相似文献   

13.
Four Cd(II)- and Cu(II)-containing coordination polymers (CPs) based on a multidentate N-donor ligand and varied dicarboxylate anions, [Cd(3,3′-tmbpt)(p-bdc)]·2.5H2O (1), [Cd(3,3′-tmbpt)(m-bdc)]·2H2O (2), [Cu(3,3′-tmbpt)(m-bdc)]·H2O (3), and [Cu(3,3′-tmbpt)(p-bdc)]·2H2O (4), where 3,3′-tmbpt = 1 ? ((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, p-H2bdc = 1,4-benzenedicarboxylic acid, and m-H2bdc = 1,3-benzenedicarboxylic acid, have been prepared hydrothermally. The structures of the compounds were determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra and elemental analyses. Compound 1 exhibits a 3-D twofold interpenetrating framework with a 65·8 CdSO4 topology. Compound 2 is a 2-D layer containing meso-helical chains with a 44·62 sql topology. Compound 3 shows a 1-D → 3-D interdigitated architecture while 4 displays a 2-D → 3-D interdigitated architecture. The structural differences of the compounds indicate that the dicarboxylate anions and the central metal ions play important roles in the resulting structures of CPs. Optical band gaps and solid-state photoluminescent properties have also been studied.  相似文献   

14.
通过水热或溶剂热合成的方法制备了5个一维配合物{[Zn(btbb)_(0.5)(m-phda)]·0.5H_2O}_n(1),{[Cd_2(btbb)(adtda)_2(H_2O)]·H_2O}_n(2),[Mn_2(btbb)(tbi)_2]_n(3),{[Cd(btbb)_(0.5)(3-Nitro-o-bdc)(H_2O)]·H_2O}_n(4)和[Cd_2(btbb)(tbi)_2]_n(5)(btbb=1,4-双(2-(4-噻唑基)苯并咪唑-1-基甲基)苯,m-H_2phda=间苯二甲酸,H_2adtda=1,3-金刚烷二羧酸,H_2tbi=5-叔丁基间苯二甲酸,3-Nitro-o-H_2bdc=3-硝基-1,2-苯二甲酸)。配合物1是一个包含22元环的一维链。配合物2是一个包含8元环的一维链,并且氮配体在这个一维链中仅仅起到装饰作用。配合物3是一个一维双链结构。配合物4是一个包含14元环的一维链。配合物5是一个阶梯状的一维双链结构。  相似文献   

15.
Herein, we report research regarding the Ln–Cu(II)–Hpic–H2BDC system, where Ln, Hpic, and H2BDC are lanthanide ions, picolinic acid, and 1,2-benzenedicarboxylic acid, respectively. Under different reaction temperatures (160°C and 170°C), the self-assembly of Gd2O3, CuCl2, Hpic, and H2BDC in water at pH = 2 adjusted by HClO4 generates two Ln-containing coordination compounds, GdCu(pic)(PhCOO)4 (1) and Gd(pic)(BDC)(µ-H2O)2(H2O) (2) (PhCOOH = benzenecarboxylic acid). Under the same reaction conditions, if Gd2O3 is replaced by Pr3O4, then polymer Pr4(BDC)6(µ-H2O)2 (3) is obtained. The structural features are 1-D tape or 2-D irregular (6, 3) net. We also explored their phase purity by X-ray diffraction analysis and evaluated their thermostability by thermogravimetric analysis studies.  相似文献   

16.
Three zinc(II) coordination polymers {[Zn(btp)(1,2-bdc)(H2O)]?·?H2O} n (1), {[Zn(btp)(1,3-bdc)(H2O)]?·?1.5H2O} n (2), and {[Zn(btp)(NO2-1,3-bdc)(H2O)]?·?2H2O} n (3) were synthesized by 1,3-bis(1,2,4-triazol-1-yl)propane (btp) and bis-carboxylate. Compound 1 is a thick 2-D network; 2 and 3 are undulated 2-D (4,4) networks. In 2 and 3, two adjacent networks interpenetrate to form a new 2-D double-layer network, which is sustained by hydrogen-bonding interactions. Compounds 1 and 2 reveal blue emission maximum at 351 and 403, respectively, in the solid state at room temperature.  相似文献   

17.
Four cobalt(II) coordination polymers, {[Co(HO-BDC)(bbp)]}n (1), {[Co(HO-BDC)(bmbp)2]·(H2O)2}n (2), {[Co(HO-BDC)(bbb)]}n (3), and {[Co2(HO-BDC)2(bmbb)2]·(H2O)3}n (4), where HO-H2BDC?=?5-hydroxyisophthalic acid, bbp = 1,3-bis(benzimidazol-1-yl)propane, bmbp = 1,3-bis(2-methyl-benzimidazol-1-yl)propane, bbb = 1,4-bis(benzimidazol-1-yl)butane, and bmbb = 1,4-bis(2-methyl-benzimidazol-1-yl)butane, have been synthesized and characterized by elemental analyses, IR spectra, single-crystal X-ray diffraction, thermogravimetric analyses, and fluorescence properties. Compounds 1 and 3 are 4-connected 2-D networks with (44·62) topology. Compound 2 is a 1-D chain, while 4 features a 1-D ladder. These 1-D and 2-D complexes are further connected by hydrogen bonds to form 3-D supramolecular architectures. Complexes 1–4 showed very strong yellow luminescence emission.  相似文献   

18.
用水热合成方法得到1个新的配位聚合物[Cd2(BDC)2(obix)2]·H2O(H2BDC=对苯二甲酸,obix=1,2-(二亚甲基)二咪唑).配合物晶体属三斜晶系,P1空间群.晶体结构表明:镉原子与3个对苯二甲酸上的5个氧原子,2个1,2-(二亚甲基)二咪唑中的2个氮原子配位形成扭曲的五角双锥配位构型.2个Cd(Ⅱ)原子通过两个羧基桥联形成一个双核Cd2单元,再通过配体连接成二维层状结构,层与层之间通过C-H…O氢键和弱的π-π相互作用形成三维超分子结构.室温下配合物具有较强的荧光发射光谱.  相似文献   

19.
Two new coordination compounds, {[Cd2(btrm)(ip)2(H2O)2]?·?2H2O} n (1) and {[Cd2(btrm)(hip)2(H2O)4]?·?3H2O} n (2) (btrm?=?bis(1,2,4-triazol-1-yl)methane, H2ip?=?isophthalic acid, H2hip?=?5-hydroxy isophthalic acid), have been synthesized and structurally characterized. Compound 1 is a 3-D network with CdSO4 topology. Compound 2 contains 1-D ladder structures, which are interconnected by classical hydrogen-bonding interactions (O–H?···?O) to lead to 3-D supramolecular architectures. Luminescence was performed on 1 and 2, both of which showed strong fluorescent emissions in the solid state at room temperature.  相似文献   

20.
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   

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