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1.
The new double Schiff-base ligands H6ipa-hyhb and H6ipa-hyhh were synthesized by condensation of a 4,6-diformylresorcinol derivative (ipa) with 4-hydroxy-butanoic acid hydrazide (hyhb) and 6-hydroxy-hexanoic acid hydrazide (hyhh). The reaction with copper(II) perchlorate in the presence of an appropriate co-ligand (Him = imidazole, Hpz = pyrazole) leads to the novel coordination polymers {[Cu2(H4ipa-hyhb)(Hpz)2](ClO4)2}n (1), {[Cu2(H4ipa-hyhb)(Him)2](ClO4)2}n (2), and {[Cu2-(H4ipa-hyhh)(Hpz)2](ClO4)2}n (3). These coordination polymers are composed of primary building blocks with the general formula [Cu2(H4ipa-X)(L)2]2+ (X = hyhb, hyhh; L = Him, Hpz) which are linked by coordination of the hydroxyl groups of the ligand side chains at the apical position of copper(II) centers of adjacent building blocks. The resulting chains possess different topologies and therefore different supramolecular structures due to the variation in length of the ligand alkyl side chains. For the complexes 1 and 2 double hydroxyalkyl-bridged distorted ladder like chains are formed. Whereas in case of complex 3 single hydroxyalkyl-bridged chains are obtained which assemble to hydrogen bonded double chains. In the case of 1 and 2 these chains are cross-linked by hydrogen bonding interactions with the perchlorate counterions, whereas for 3 additional π–π stacking interaction are observed. The temperature-dependent magnetic measurements indicate weak antiferromagnetic interactions with coupling constants J = −26.1 cm−1 (1), J = −28.2 cm−1 (2), and J = −26.5 cm−1 (3). The magnetic exchange interaction is solely the result of a coupling within the dinuclear complex moieties through the central resorcinol moiety. 相似文献
2.
Chu‐Jun Chen Jin‐Ying Gao Xia Zhao Li‐Mei Chang Ying‐Liang Liu Hai‐Hong Mo Prof. Dr. Shan‐Tang Yue 《无机化学与普通化学杂志》2012,638(14):2324-2328
Reactions of H3tda (H3tda = 1H‐1, 2, 3‐triazole‐4, 5‐dicarboxylic acid) with Sm(NO3)3 · 6H2O, Eu(NO3)3 · 6H2O, and Tb(NO3)3 · 6H2O, in the presence of NaOH under hydrothermal conditions, produced three new coordination polymers, [Ln2(tda)2(H2O)3] · 5H2O [Ln = Sm ( 1 ), Eu ( 2 ), Tb ( 3 )]. These compounds were structurally characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), PXRD and single‐crystal X‐ray diffraction. The single‐crystal X‐ray diffraction studies of compounds 1 – 3 reveal that all compounds are three‐dimensional porous structures with chiral frameworks. Furthermore, the luminescence studies of compound 2 and 3 in the solid state reveal that they are potential luminescent materials at room temperature. 相似文献
3.
Synthesis,Structures, and Photoluminescence Properties of Five Novel Zinc(II) and Cadmium(II) Coordination Polymers based on Different Zwitterionic Pyridine Ligands
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Lin Du Lin‐Zong Zhou Yu‐Lu Ma Yu‐Na Wang Da‐Wei Wang Qi‐Hua Zhao 《无机化学与普通化学杂志》2017,643(24):2116-2123
A series of five new ZnII and CdII mixed‐ligand coordination polymers, namely, {[Zn(L1)(4,4′‐bpy)] · (ClO4) · 2H2O} ( 1 ), {[Zn(L2)(4,4′‐bpy)0.5] · (ClO4)} ( 2 ), {[Zn(L3)(4,4′‐bpy)] · (NO3) · 2H2O} ( 3 ), {[Cd(L4)(4,4′‐bpy)0.5(NO3)] · 5H2O} ( 4 ), and {[Zn(L4)(4,4′‐bpy)] · Cl · H2O} ( 5 ) [4,4′‐bpy = 4,4′‐bipyridine, L1 = 4‐carboxy‐1‐(4‐carboxybenzyl)pyridin‐1‐ium chloride, L2 = 3‐carboxy‐1‐(4‐carboxybenzyl)pyridin‐1‐ium chloride, L3 = 4‐carboxy‐1‐(3‐carboxybenzyl)pyridin‐1‐ium chloride, and L4 = 3‐carboxy‐1‐(3‐carboxybenzyl)pyridin‐1‐ium chloride], were obtained by the reactions of the 4,4′‐bipyridine with four dicarboxylate zwitterionic pyridine ligands. Single‐crystal X‐ray structural analyses reveal that the five complexes demonstrate different molecular frameworks coming from various coordination modes and flexibilities of different dicarboxylate zwitterionic pyridine ligands and central metal atoms. Mononuclear twofold dinuclear 2D twofold interpenetrating net for 2 , four‐coordinate mononuclear twofold interpenetrating 2D layer for 3 , mononuclear 2D layer arranged in parallel and with large grids for 4 , and twofold trans interpenetrating 2D network for compound 5 . The structural diversities in 1 – 5 indicate that the nature of the ligands and the presence of different metal atoms have a great influence on central metal coordination modes and the structural topologies of the metal‐organic molecular architectures. In addition, π ··· π stacking interactions also play important roles in the final crystal packing and supramolecular frameworks. The powder X‐ray diffraction, elemental analysis, and photoluminescence properties of 1 – 5 were studied, which show that architectures play an important role in emission bands and intensities. 相似文献
4.
Yu Xian Shu Yun Niu Prof. Jing Jin Li Ping Sun Guang Di Yang Ling Ye 《无机化学与普通化学杂志》2007,633(8):1274-1278
Three cadmium(II) coordination polymers [Cd(NA)2(H2O)2]n ( 1 ), {[Cd(NA)(phen)(NO3)]·(H2O)1/2}n ( 2 ), {[Cd(NA)(CH3C6H4COO)(H2O)2]·(CH3C6H4COOH)}n ( 3 ) (HNA = nicotinic acid, phen = 1, 10‐phenanthroline) have been synthesized by hydrothermal method. Their single‐crystal structures were determined by X‐ray diffractometry. The absorption, excitation and emission spectra were investigated and all the complexes emit strong fluorescence: λemmax = 544 nm (λex = 492 nm), 1 ; λemmax = 466 nm (λex = 393 nm), 2 ; λemmax = 430 nm (λex = 313 nm), 3 . At room temperature in the solid state the fluorescence lifetimes of the complexes were investigated and the relationships between the spectra were discussed as well as the connections of luminescence and crystal structures. 相似文献
5.
Yuan‐Yuan Gao Yue Ma Ya‐Li Wang Yu‐Zhang Tong Ming‐Fang Yang Qing‐Lun Wang Li‐Cun Li Dai‐Zheng Liao 《无机化学与普通化学杂志》2013,639(6):1015-1020
Two heterospin complexes [Cu(NIT3Py)(cda)H2O] · H2O ( 1 ) and [Cu(NIT2Py)(cda)H2O] · H2O · CH3OH ( 2 ) with CuII ions and pyridyl‐substituted nitronyl nitroxide radicals (NITxPy = 2‐(x′‐pyridyl)‐4,4,5,5‐tetramethyl‐imidazoline‐1‐oxyl‐3‐oxide, x = 3, 2; H2cda = 4‐hydroxy‐pyridine‐2,6‐dicarboxylic acid) were synthesized and characterized structurally and magnetically. The single crystal structures show that the two complexes are both two‐spin complexes, in which the different radicals make the two complexes have different hydrogen bonding interactions to form 2D and 1D supramolecular network for complexes 1 and 2 , respectively. The magnetic measurements indicate that complexes 1 and 2 both exhibit antiferromagnetic interactions between CuII and radicals. 相似文献
6.
Dr. Ya‐Guang Sun Tian‐Yi Lv Xin Gao Gang Xiong Di Sun Ling‐Ling He Zhen‐He Xu Shu‐Ju Wang Fu Ding 《无机化学与普通化学杂志》2012,638(14):2365-2369
Three new lanthanide‐organic coordination polymers, {[Ln2(bpdc)2(H2O)6(NO3)] · NO3} [Ln = La ( 1 ), Ce ( 2 ), Pr ( 3 )] (H2bpdc = 2, 2′‐bipyridine‐6, 6′‐dicarboxylic acid) were synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR spectroscopy as well as single‐crystal and powder X‐ray diffraction. Single‐crystal X‐ray diffraction analysis revealed that compounds 1 – 3 are isostructural, composed of two dimensional honeycomb network linked by bpdc ligands. The magnetic property of compound 3 was investigated. 相似文献
7.
Two Coordination Polymers based on a Flexible Tritopic Pyridyldicarboxylate Ligand: Structures and Magnetic Properties
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Yong‐Liang Liu Feng‐Ying Chen Yan‐Qing Di Jie Cao You‐Ying Di Chun‐Sheng Zhou 《无机化学与普通化学杂志》2016,642(3):246-249
The coordination polymers, [Ni(L)2]n ( 1 ) and [Mn2(L)2(DMF)2(H2O)]n ( 2 ) were synthesized by using a tritopic ligand 5‐(4′‐carboxylphenoxy)nicotinic acid (H2L). The structural analysis shows that compound 1 exhibits a ten‐connected three‐dimensional (3D) architecture with the point symbol 312.426.57, 2 displays an eight‐connected topology network with a point symbol of 424.64. The structures and formulas of 1 and 2 were determined by X‐ray diffraction, elemental analysis, and thermogravimetric analysis (TGA). In addition, the magnetic behaviors for 1 and 2 were investigated. 相似文献
8.
Victor Ch. Kravtsov Vasile Lozovan Nikita Siminel Eduard B. Coropceanu Olga V. Kulikova Natalia V. Costriucova Marina S. Fonari 《Molecules (Basel, Switzerland)》2020,25(23)
Eight mixed-ligand coordination networks, [Cd(2-aba)(NO3)(4-bphz)3/2]n·n(dmf) (1), [Cd(2-aba)2(4-bphz)]n·0.75n(dmf) (2), [Cd(seb)(4-bphz)]n·n(H2O) (3), [Cd(seb)(4-bpmhz)]n·n(H2O) (4), [Cd(hpa)(3-bphz)]n (5), [Zn(1,3-bdc)(3-bpmhz)]n·n(MeOH) (6), [Cd(1,3-bdc)(3-bpmhz)]n ·0.5n(H2O)·0.5n(EtOH) (7), and [Cd(NO3)2(3-bphz)(bpe)]n·n(3-bphz) (8) were obtained by interplay of cadmium nitrate tetrahydrate or zinc nitrate hexahydrate with 2-aminobenzenecarboxylic acid (H(2-aba)), three dicarboxylic acids, sebacic (decanedioic acid, H2seb), homophthalic (2-(carboxymethyl)benzoic acid, H2hpa), isophthalic (1,3-benzenedicarboxylic acid, H2(1,3-bdc)) acids, bis(4-pyridyl)ethane (bpe) and with four azine ligands, 1,2-bis(pyridin-4-ylmethylene)hydrazine (4-bphz), 1,2-bis(1-(pyridin-4-yl)ethylidene) hydrazine (4-bpmhz), 1,2-bis(pyridin-3-ylmethylene)hydrazine (3-bphz), and 1,2-bis(1-(pyridin-3-yl) ethylidene)hydrazine (3-bpmhz). Compounds 1 and 2 are 1D coordination polymers, while compounds 3–8 are 2D coordination polymers. All compounds were characterized by spectroscopic and X-ray diffraction methods of analysis. The solvent uptakes and stabilities to the guest evacuation were studied and compared for 1D and 2D coordination networks. The de-solvated forms revealed a significant increase of emission in comparison with the as-synthesized crystals. 相似文献
9.
Reaction of iron(II), cobalt(II) and nickel(II) selenocyanate with pyrazine in water at room temperature leads to the formation of the isotypic new ligand‐rich 1:2 (1:2 = ratio between metal and co‐ligand) compounds [M(NCSe)2(pyrazine)2]n (M = Fe ( 1 ), Co ( 2 ), Ni ( 3 )). The crystal structure of 2 was determined by X‐ray single crystal analysis and those of 1 and 3 were refined from X‐ray powder data with the Rietveld method. In their crystal structure the metal(II) cations are coordinated by four pyrazine co‐ligands, which connect them into layers, and two terminally N‐bonded selenocyanato anions in a distorted octahedral arrangement. The terminal coordination mode of the selenocyanato anions was further emphasized by IR spectroscopic investigations. On heating, all compounds decompose in a single heating step without the formation of ligand‐deficient intermediates like previously reported for related thiocyanato compounds. Magnetic measurements of compound 1 show a long‐range antiferromagnetic ordering with an ordering temperature of TN = 6.7 K, which must be mediated by the aromatic π‐system of the pyrazine ligand, whereas 2 and 3 show only Curie–Weiss behavior with antiferromagnetic exchange interactions. 相似文献
10.
The manganese(II) coordination polymer [Mn(2‐Meimi)2(μ1,1‐N3)2]n · nH2O ( 1 ) (Meimi = 2‐methyl‐imidazole) with μ1,1‐N3 (end‐on, EO) bridge was synthesized by hydrothermal reaction of MnCl2, NaN3, and Meimi. It was characterized by elemental analysis, IR spectroscopy, powder XRD, and magnetic measurements. Single crystal X‐ray analysis revealed that compound 1 features a one‐dimensional (1D) catenated structure and the 1D chains are further connected by strong intermolecular hydrogen bonds to a 3D supramolecular framework. Variable‐temperature magnetic susceptibility measurements revealed that compound 1 displays dominant ferromagnetic interactions through the μ1,1‐N3 (end‐on, EO) bridging mode. 相似文献
11.
Xiaoting Qin Yufei Ji Yanfei Gao Lei Yan Shuai Ding Yanqin Wang Zhiliang Liu 《无机化学与普通化学杂志》2014,640(2):462-468
Three new phenolate oxygen bridged transition metal complexes [Zn3(HL1)3(μ3‐CH3O)]·(ClO4)2(H2O)3 ( 1 ), [Ni2(HL1)2(μ1,1‐N3)(o‐vanillin)]·H2O ( 2 ), [Ni3(HL2)2(PhCOO)2(PhCOOH)2(EtOH)2] ( 3 ) have been synthesized by metal ions and potentially multidentate Schiff base ligands (H2L1 = 2‐((1‐hydroxy‐2‐methylpropan‐2‐ylimino) methyl)‐6‐methoxyphenol; H3L2 = (E)‐1‐((2‐hydroxy‐3‐methoxy‐benzylidene)amino)ethane‐1,2‐diol). All the three complexes 1 , 2 , and 3 have been characterized by elemental analysis, FT‐IR spectroscopy, and single‐crystal X‐ray diffraction studies. Crystal structures reveal that complex 1 is a trinuclear incomplete cubane‐like zinc cluster whereas complex 2 is a dinuclear nickel complex bridged by azide, and compound 3 is a trinuclear nickel complex. The luminescent property for complex 1 and magnetic behaviors for complexes 2 and 3 have been investigated. 相似文献
12.
Heterotrimetallic Coordination Polymers: {CuIILnIIIFeIII} Chains and {NiIILnIIIFeIII} Layers: Synthesis,Crystal Structures,and Magnetic Properties
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Dr. Maria‐Gabriela Alexandru Dr. Diana Visinescu Prof. Marius Andruh Dr. Nadia Marino Dr. Donatella Armentano Dr. Joan Cano Prof. Francesc Lloret Prof. Miguel Julve 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(14):5429-5446
The use of the [FeIII(AA)(CN)4]? complex anion as metalloligand towards the preformed [CuII(valpn)LnIII]3+ or [NiII(valpn)LnIII]3+ heterometallic complex cations (AA=2,2′‐bipyridine (bipy) and 1,10‐phenathroline (phen); H2valpn=1,3‐propanediyl‐bis(2‐iminomethylene‐6‐methoxyphenol)) allowed the preparation of two families of heterotrimetallic complexes: three isostructural 1D coordination polymers of general formula {[CuII(valpn)LnIII(H2O)3(μ‐NC)2FeIII(phen)(CN)2 {(μ‐NC)FeIII(phen)(CN)3}]NO3 ? 7 H2O}n (Ln=Gd ( 1 ), Tb ( 2 ), and Dy ( 3 )) and the trinuclear complex [CuII(valpn)LaIII(OH2)3(O2NO)(μ‐NC)FeIII(phen)(CN)3] ? NO3 ? H2O ? CH3CN ( 4 ) were obtained with the [CuII(valpn)LnIII]3+ assembling unit, whereas three isostructural heterotrimetallic 2D networks, {[NiII(valpn)LnIII(ONO2)2(H2O)(μ‐NC)3FeIII(bipy)(CN)] ? 2 H2O ? 2 CH3CN}n (Ln=Gd ( 5 ), Tb ( 6 ), and Dy ( 7 )) resulted with the related [NiII(valpn)LnIII]3+ precursor. The crystal structure of compound 4 consists of discrete heterotrimetallic complex cations, [CuII(valpn)LaIII(OH2)3(O2NO)(μ‐NC)FeIII(phen)(CN)3]+, nitrate counterions, and non‐coordinate water and acetonitrile molecules. The heteroleptic {FeIII(bipy)(CN)4} moiety in 5 – 7 acts as a tris‐monodentate ligand towards three {NiII(valpn)LnIII} binuclear nodes leading to heterotrimetallic 2D networks. The ferromagnetic interaction through the diphenoxo bridge in the CuII?LnIII ( 1 – 3 ) and NiII?LnIII ( 5 – 7 ) units, as well as through the single cyanide bridge between the FeIII and either NiII ( 5 – 7 ) or CuII ( 4 ) account for the overall ferromagnetic behavior observed in 1 – 7 . DFT‐type calculations were performed to substantiate the magnetic interactions in 1 , 4 , and 5 . Interestingly, compound 6 exhibits slow relaxation of the magnetization with maxima of the out‐of‐phase ac signals below 4.0 K in the lack of a dc field, the values of the pre‐exponential factor (τo) and energy barrier (Ea) through the Arrhenius equation being 2.0×10?12 s and 29.1 cm?1, respectively. In the case of 7 , the ferromagnetic interactions through the double phenoxo (NiII–DyIII) and single cyanide (FeIII–NiII) pathways are masked by the depopulation of the Stark levels of the DyIII ion, this feature most likely accounting for the continuous decrease of χM T upon cooling observed for this last compound. 相似文献
13.
Four Transition Metal Coordination Polymers based on an Aromatic Multi‐carboxylic Acid as Ligand: Syntheses,Crystal Structures,and Fluorescent/Magnetic Properties
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Four compounds, namely, [Zn(H2L)2 · 4H2O] ( 1 ), [Cu(HL) · (H2O)] · H2O ( 2 ), [Ni3L2(bpy)2 · 12H2O] · 4H2O ( 3 ), and [Co3L2(bpy)2 · 12H2O] · 4H2O ( 4 ) [H3L = 4, 4′‐[(5‐carboxy‐1, 3‐phenylene)bis(oxy)]dibenzoic acid], were synthesized under solvothermal conditions by employing a semi‐rigid aromatic multi‐carboxylic acid ligand (H3L) and ancillary nitrogen ligand (bpy = 4, 4′‐bipyridine). X‐ray diffraction studies revealed that complexes 1 , 3 , and 4 show zero‐dimensional (0D) structures, which were further extended to distinct 3D supramolecular nets by extensive hydrogen‐bond interactions. However, in compound 2 , 1D chains of square‐shaped pores were linked together by HL2– ligands to generate a 2D porous layer along the ac plane. Comparison of the structures indicated that not only the conformation of the functional ligand, but also the ancillary ligand helped in structural determination of the compounds. Compound 1 exhibited solid fluorescence emission originating from an intraligand π→π* transition. Magnetic susceptibility measurements demonstrated that compound 2 exhibited antiferromagnetic coupling between adjacent copper(II) ions, with the corresponding J values of –141.84 cm–1. Furthermore, the thermal behaviors of the complexes 1 – 4 were studied by thermogravimetric analysis. 相似文献
14.
David Adner Marcus Korb Charles Lochenie Birgit Weber Heinrich Lang 《无机化学与普通化学杂志》2015,641(7):1243-1246
The synthesis and characterisation of the hexanuclear copper(II) carboxylate complex [Cu(O2CCHPhOC2H4OC2H4OCH3)2]6 ( 1 ) is described. Single‐crystal X‐ray structure analysis reveals that the copper(II) ions are arranged in a six‐membered ring which adopts a chair‐like conformation. The copper(II) ions are bridged by μ2‐ and μ3‐coordinating carboxylates. The magnetic behavior of 1 was measured between 2 and 300 K, revealing at low temperature a weak antiferromagnetic interaction. The χM(T) dependency was fitted mathematically with one coupling constant J1 and a paramagnetic impurity α. 相似文献
15.
2D Coordination Polymer with a 1D Carboxylate‐Copper Chain Based on Rare Icosanuclear and Tetranuclear Clusters
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The 2D coordination polymer {[Cu32( pa )24(μ2‐OH)8(μ3‐OH)8( bibp )8] · (CH3OH)3(H2O)5}∞ was prepared by the solvothermal reaction of Cu(NO3)2 · 3H2O with phthalic acid (H2 pa ) and 4, 4′‐bis(imidazol‐1‐yl)biphenyl ( bibp ). The CuII ions show five different kinds of coordination environments, which are all connected by the pa 2– ion into an interesting 1D carboxylate‐copper chain with rare icosacopper and tetracopper clusters. The 1D chain is further bridged by the bibp ligand to form a 2D layer, which could be viewed as an unprecedented (4, 4) lattice based on rectangular and butterfly‐shaped tetracopper clusters with the ratio of 2:6. The magnetic properties were studied, and the results show antiferromagnetic interaction in the complicated 1D chain. 相似文献
16.
Two cobalt(II) coordination polymers, {[Co(μ‐4,4′‐bipy)(4,4′‐bipy)2(H2O)2]·(OH)3·(Me4N)·4,4′‐bipy·4H2O}n ( 1 ) and {[Co(μ‐4,4′‐bipy)(H2O)4]·suc·4H2O}n ( 2 ) (4,4′‐bipy = 4,4′‐bipyridine, suc = succinate dianions), were hydrothermally synthesized and structurally characterized by X‐ray diffraction analysis, UV‐Vis‐NIR, and ICP. The main structure feature common to the both polymers is presence of the infinite linear chains, [Co(μ‐4,4′‐bipy)(4,4′‐bipy)2(H2O)2]n ( 1 ) and [Co(μ‐4,4′‐bipy)(H2O)4]n ( 2 ), respectively. In 1 , the chains are further linked by the hydrogen‐bond and π‐π stacking interaction, producing extended layer structure. The 4,4′‐bipy molecules in 1 play three different roles. In 2 , the chains are linked into three‐dimensional network structure via complicated hydrogen bonding system. The variable temperature (2.0~300 K) magnetic susceptibility of 1 indicates a tendency of spin‐transition in the temperature range of 110 K to 22 K, which attributes to the transition of high‐spin to low‐spin from Co2+(d7) ion. Also, the result of surface photovoltage spectroscopy (SPS) reveals that the polymer 1 has significant photoelectric conversion property in the region of 300‐800 nm. 相似文献
17.
Cristian D. Ene Floriana Tuna Oscar Fabelo Catalina Ruiz-Pérez Augustin M. Madalan Herbert W. Roesky Marius Andruh 《Polyhedron》2008
Four new coordination polymers were obtained by employing polycarboxylato spacers and cationic copper(II) complexes as nodes: ∞2[Cu3(trim)2(NH3)6(H2O)3] (1); ∞1[Cu(tmen)(dhtp)] (2), ∞1[Cu(tmen)(hitp)(H2O)] (3), ∞1[Cu(tmen)(nitp)] (4). (H3trim = trimesic acid, H2dhtp = 2,5-dihydroxy-terephthalic acid; H2hitp = 5-hydroxy-isophthalic acid, H2nitp = 5-nitro-isophthalic acid; tmen = N,N,N′,N′-tetramethyl-ethylenediamine). The crystal structures of the four compounds have been solved. Compound 1 consists of 2D coordination polymers with heart-shaped meshes, while compounds 2–4 contain infinite zigzag chains. The role of the hydrogen bond interactions in sustaining the supramolecular solid-state architectures in compounds 1 and 3 is discussed. The cryomagnetic investigation of compounds 1, 2, and 4 reveals antiferromagnetic interactions between the copper ions. 相似文献
18.
Yan‐Feng Zheng Ya‐Qiu Sun Xiao‐Xu Liu Yan‐Yan Xu Dong‐Zhao Gao Guo‐Ying Zhang 《无机化学与普通化学杂志》2014,640(11):2232-2237
Two coordination polymers [Zn2(ipt)2(CuL)2(H2O)] ( 1 ) and [Zn2(ipt)2(NiL)2(H2O)] ( 2 ) (ML, H2L = 2,3‐dioxo‐5,6,14,15‐dibenzo‐1,4,8,12‐tetraazacyclo‐pentadeca‐7,13‐dien; H2ipt = isophthalic acid) were synthesized by solvothermal methods and characterized by single‐crystal X‐ray diffraction. Complexes 1 and 2 exhibit ladderlike chains, consisting of Zn4Cu4 and Zn4Ni4 units, respectively, which are connected via oxamide and isophthalate. These chains are further interlinked by hydrogen bonds resulting in a 2D supramolecular architecture. The fluorescence properties of compounds 1 and 2 are also discussed. 相似文献
19.
Shouwen Jin Dr. Daqi Wang Zhiwen Zheng Jie Chen Chao Feng Xianghua Ye Yiping Zhou 《无机化学与普通化学杂志》2010,636(8):1617-1624
Five novel coordination polymers, [(Cu(L1)2OH) · Cl · 3H2O] ( 1 ) [L1 = bis(N‐imidazolyl)methane], [Cd(L1)2(NCS)2] ( 2 ), [Zn(L1)2(NCS)2] ( 3 ), [Cu(L1)2(NO3)2] ( 4 ), and [Cu(L2)1.5(NCS)2] ( 5 ) [L2 = 1,4‐bis(N‐imidazolyl)butane] were obtained from self‐assembly of the corresponding metal salts with flexible ligands and their structures were fully characterized by X‐ray diffraction (XRD) analysis, Fourier Transform Infrared (FT‐IR) spectroscopy, elemental analysis and thermogravimetric (TGA) measurements. X‐ray diffraction analyses revealed that complexes 1 , 2 , 3 , and 4 exhibit 1D double‐stranded chain structures, which result from doubly bridged [CuOH], [M(NCS)2] (M = Cd, Zn), and [Cu(NO3)2] units, respectively. The polymeric copper complex 5 displays 1D ladder structure., These complexes, with the exception of complex 1 , are stable up to 300 °C. 相似文献
20.
Sebastian Bette Alice Costes Reinhard K. Kremer Gerhard Eggert Chiu C. Tang Robert E. Dinnebier 《无机化学与普通化学杂志》2019,645(15):988-997
Pure anhydrous Cu(CH3COO)2 was obtained both, by thermal dehydration of Cu(CH3COO)2 · H2O and by drying a commercially purchased mixture of Cu(CH3COO)2 · H2O and Cu(CH3COO)2 in a nitrogen atmosphere using P2O5 as drying agent. The crystal structure was solved ab initio from synchrotron X‐ray powder diffraction (XRPD) data at 150 °C and from laboratory XRPD data at ambient conditions and found to be isotypic to anhydrous chromium(II), molybdenum(II) and rhodium(II) acetate. Cu(CH3COO)2 crystallizes in space group P1 (no. 2) with lattice parameters of a = 5.1486(3) Å, b = 7.5856(6) Å, c = 8.2832(6) Å, α = 77.984(4)°, β = 75.911(8)°, γ = 84.256(6)° at ambient conditions. Cu2(CH3COO)4 paddle wheels with short (2.6 Å) Cu–Cu distances form chains in a direction, which is the main motif in the crystal structure. Due to their identical structural main motif Cu(CH3COO)2 · H2O and Cu(CH3COO)2 exhibit a similar bluish‐green color, almost identical UV/Vis spectra and comparable magnetic properties. The temperature dependent magnetic susceptibility also indicates only weak inter‐dimer spin exchange between neighbouring Cu2(CH3COO)4 paddle wheels. 相似文献