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1.
Mwaffak Rukiah Mahmoud Al‐Ktaifani 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(3):m135-m138
In order to explore the chemistry of the bidentate ligand 2,2‐dimethylpropane‐1,3‐diyl diisocyanide and to investigate the effect of counter‐ions on the polymeric structure of (2,2‐dimethylpropane‐1,3‐diyl diisocyanide)silver(I) complexes, the title polymeric compound, [AgI(C7H10N2)]n, was synthesized by treatment of 2,2‐dimethylpropane‐1,3‐diyl diisocyanide with AgI. X‐ray powder diffraction studies show, as expected, a polymeric structure, similar to the very recently reported Cl− and NO3− analogues [AgX(C7H10N2)]n (X = Cl− or NO3−). In the title structure, the AgI centre is bridged to two adjacent AgI neighbours by bidentate 2,2‐dimethylpropane‐1,3‐diyl diisocyanide ligands via the NC groups to form [Ag{CNCH2C(CH3)2CH2NC}]n chains. The iodide counter‐ions crosslink the AgI centres of the chains to form a two‐dimensional polymeric {[Ag{CNCH2C(CH3)2CH2NC}]I}n network. This study also shows that this bidentate ligand forms similar polymeric structures on treatment with AgX, regardless of the nature of the counter‐ion X−, and also has a strong tendency to form polymeric complexes rather than dimeric or trimeric ones. 相似文献
2.
Yang Yang Tao Jia Ying‐Zi Han Zi‐Ang Nan Shang‐Fu Yuan Feng‐Lei Yang Di Sun 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(35):12408-12413
The hardness of oxo ions (O2?) means that coinage‐metal (Cu, Ag, Au) clusters supported by oxo ions (O2?) are rare. Herein, a novel μ4‐oxo supported all‐alkynyl‐protected silver(I)–copper(I) nanocluster [Ag74?xCuxO12(PhC≡C)50] ( NC‐1 , avg. x=37.9) is characterized. NC‐1 is the highest nuclearity silver–copper heterometallic cluster and contains an unprecedented twelve interstitial μ4‐oxo ions. The oxo ions originate from the reduction of nitrate ions by NaBH4. The oxo ions induce the hierarchical aggregation of CuI and AgI ions in the cluster, forming the unique regioselective distribution of two different metal ions. The anisotropic ligand coverage on the surface is caused by the jigsaw‐puzzle‐like cluster packing incorporating rare intermolecular C?H???metal agostic interactions and solvent molecules. This work not only reveals a new category of high‐nuclearity coinage‐metal clusters but shows the special clustering effect of oxo ions in the assembly of coinage‐metal clusters. 相似文献
3.
Volker Gramlich Pemysl Lubal Stefano Musso Giorgio Anderegg 《Helvetica chimica acta》2001,84(3):623-631
Complex formation between N,N,N′,N′‐tetrakis(2‐aminoethyl)ethane‐1,2‐diamine (penten) and the metal ions Mn2+, Co2+, Cu2+, Zn2+, Cd2+, Hg2+, Ag+, Pb2+, and Tl3+ (in 1.00M NaNO3 and 25°) was investigated by potentiometry and spectrophotometry. These are the first reported values of the stability constants for this ligand with Ag+, Pb2+, and Tl3+. The X‐ray crystal structure of [Tl(NO3)(penten)](NO3)2 was determined. In this structure, Tl3+ shows a coordination number of seven made up of the six N‐donors and one O‐atom of NO. 相似文献
4.
Dirk Lützenkirchen‐Hecht Hans‐Henning Strehblow 《Surface and interface analysis : SIA》2009,41(10):820-829
Silver (II) oxide layers (AgO) were prepared by anodic oxidation of pre‐oxidized, Ag2O‐covered silver electrodes in 1 M NaOH (pH 13.8). The oxidized electrodes were investigated using a combination of electrochemical techniques, ex situ X‐ray photoelectron spectroscopy (XPS) and in situ surface‐sensitive grazing incidence X‐ray absorption spectroscopy (EXAFS) under full potential control. The application of these different techniques leads to a detailed, consistent picture of the anodic silver (II) oxide layer formation. The experiments have shown that the chemical composition of the AgO layer varies significantly with oxidation potential, revealing a decreasing oxygen deficiency with increasing anodization potential and oxidation time. XPS as well as EXAFS experiments support the interpretation of the oxide as a mixed valence Ag + Ag3 + O2 with different contributions of Ag + and Ag3 + species, depending on potential and anodization time. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
5.
Guo-Xia Jin Tian-Chao You Jian-Ping Ma 《Acta Crystallographica. Section C, Structural Chemistry》2019,75(12):1690-1697
The new asymmetrical organic ligand 2‐{4‐[(1H‐imidazol‐1‐yl)methyl]phenyl}‐5‐(pyridin‐4‐yl)‐1,3,4‐oxadiazole ( L , C17H13N5O), containing pyridine and imidazole terminal groups, as well as potential oxdiazole coordination sites, was designed and synthesized. The coordination chemistry of L with soft AgI, CuI and CdII metal ions was investigated and three new coordination polymers (CPs), namely, catena‐poly[[silver(I)‐μ‐2‐{4‐[(1H‐imidazol‐1‐yl)methyl]phenyl}‐5‐(pyridin‐4‐yl)‐1,3,4‐oxadiazole] hexafluoridophosphate], {[Ag( L )]PF6}n, catena‐poly[[copper(I)‐di‐μ‐iodido‐copper(I)‐bis(μ‐2‐{4‐[(1H‐imidazol‐1‐yl)methyl]phenyl}‐5‐(pyridin‐4‐yl)‐1,3,4‐oxadiazole)] 1,4‐dioxane monosolvate], {[Cu2I2( L )2]·C4H8O2}n, and catena‐poly[[[dinitratocopper(II)]‐bis(μ‐2‐{4‐[(1H‐imidazol‐1‐yl)methyl]phenyl}‐5‐(pyridin‐4‐yl)‐1,3,4‐oxadiazole)]–methanol–water (1/1/0.65)], {[Cd( L )2(NO3)2]·2CH4O·0.65H2O}n, were obtained. The experimental results show that ligand L coordinates easily with linear AgI, tetrahedral CuI and octahedral CdII metal atoms to form one‐dimensional polymeric structures. The intermediate oxadiazole ring does not participate in the coordination interactions with the metal ions. In all three CPs, weak π–π interactions between the nearly coplanar pyridine, oxadiazole and benzene rings play an important role in the packing of the polymeric chains. 相似文献
6.
Ai‐Li Cui Peng Han Hui‐Juan Yang Ru‐Ji Wang Hui‐Zhong Kou 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(12):m560-m562
In the title complex, [Ag(NO3)(C6H7N3O)]n or [Ag(NO3)(pyaoxH2)] (pyaoxH2 is N‐hydroxypyridine‐2‐carboxamidine), the Ag+ ion is bridged by the pyaoxH2 ligands and nitrate anions, giving rise to a two‐dimensional molecular structure. Each pyaoxH2 ligand coordinates to two Ag+ ions using its pyridyl and carboxamidine N atoms, and the OH and the NH2 groups are uncoordinated. Each nitrate anion uses two O atoms to coordinate to two Ag+ ions. The Ag...Ag separation via the pyaoxH2 bridge is 2.869 (1) Å, markedly shorter than that of 6.452 (1) Åvia the nitrate bridge. The two‐dimensional structure is fishscale‐like, and can be described as pyaoxH2‐bridged Ag2 nodes that are further linked by nitrate anions. Hydrogen bonding between the amidine groups and the nitrate O atoms connects adjacent layers into a three‐dimensional network. 相似文献
7.
Jian‐Long Du Xiao‐Long Zhu Pei Li 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(10):m281-m283
Yellow needle‐shaped crystals of the title compound, {[Ag(C30H22N4)][Ag(NO3)2]}n, were obtained by the reaction of AgNO3 and 9,10‐bis(benzimidazol‐1‐ylmethyl)anthracene (L) in a 2:1 ratio. The asymmetric unit consists of two AgI cations, one half L ligand and one nitrate anion. One AgI cation occupies a crystallographic inversion centre and links two N‐atom donors of two distinct L ligands to form an infinite one‐dimensional coordination polymer. The second AgI cation lies on a crystallographic twofold axis and is coordinated by two O‐atom donors of two nitrate anions to form an [Ag(NO3)2]− counter‐ion. The polymeric chains are linked into a supramolecular framework via weak Ag...O [3.124 (5) Å] and Ag...π (2.982 Å) interactions (π is the centroid of an outer anthracene benzene ring). The π interactions contain two short Ag...C contacts [2.727 (6) and 2.765 (6) Å], which can be considered to define Ag–η2‐anthracene bonding interactions. In comparison with a previously reported binuclear AgI complex [Du, Hu, Zhang, Zeng & Bu (2008). CrystEngComm, 10 , 1866–1874], this new one‐dimensional coordination polymer was obtained by changing the metal–ligand ratio during the synthesis. 相似文献
8.
A new ratiometric fluorescent sensor ( 1 ) for Cu2+ based on 4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐s‐indacene (BODIPY) with di(2‐picolyl)amine (DPA) as ion recognition subunit has been synthesized and investigated in this work. The binding abilities of 1 towards different metal ions such as alkali and alkaline earth metal ions (Na+, K+, Mg2+, Ca2+) and other metal ions ( Ba2+, Zn2+, Cd2+, Fe2+, Fe3+, Pb2+, Ni2+, Co2+, Hg2+, Ag+) have been examined by UV‐vis and fluorescence spectroscopies. 1 displays high selectivity for Cu2+ among all test metal ions and a ~10‐fold fluorescence enhancement in I582/I558 upon excitation at visible excitation wavelength. The binding mode of 1 and Cu2+ is a 1:1 stoichiometry determined via studies of Job plot, the nonlinear fitting of the fluorometric titration and ESI mass. 相似文献
9.
Two novel 25,27-dihydroxy-26,28-bis(3-phenylthiapropxy)-calix[4]arene(3) and 25,27-dihydroxy-26,28-bis(3-phenylthiapropoxy)-5,11,17,23-tetra-tert-butylcalix[4] arene (4) were synthesized for the evaluation of their ion-selectivity in ion-selective electrodes(ISEs).ISEs based on 3 and 4 as neutral ionophores were prepared,and their selectivity coefficients for Ag^ (lg KAg,M^pot)were investigated against other alkali metal,alkaline-earth metal,aluminum,thallium(Ⅰ),Lead and some transition metal ions using the separate solution method (SSM).These ISEs showed excellent Ag^ seletivity over most of the interfering cations examined,except for Hg^2 and Fe^2 having relative smaller interference(lg KAg,M^pot≤-2.1). 相似文献
10.
Chong‐Qing Wan Zi‐Jia Wang Peng Qiao Zhi‐Wei Wang Ai‐Min Li 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(5):m117-m120
In the title complex, [Ag(NO3)(C9H7N3OS)]n, η1:η1:η1:μ2‐bridging 2‐(pyridin‐4‐ylsulfinyl)pyrimidine (pypmSO) ligands with opposite chiralities are alternately arranged to link the AgI cations through two N atoms and one sulfinyl O atom of each ligand, leading to an extended zigzag coordination chain structure along the [01] direction. An FT–IR spectroscopic study shows a decreased stretching frequency for the η1‐O‐bonded S=O group compared with that of the free ligand. The parallel chains are arranged and interconnected via O(S=O)...π(pyridine/pyrimidine) and C—H(pyridine)...O(NO3−) interactions to furnish a layer almost parallel to the ac plane. Along the b axis, the layers are stacked and stabilized through anion(NO3−)...π(pyrimidine) interactions to form a three‐dimensional supramolecular framework. The ligand behaviour of the new diheterocyclic sulfoxide and the unconventional O(S=O)...π(pyridine/pyrimidine) and anion(NO3−)...π(pyrimidine) interactions in the supramolecular assembly of the title complex are presented. 相似文献
11.
Xiaoming Liu Colin A. Kilner Malcolm A. Halcrow 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):m100-m102
The title compound, [Cu4Cl6O(C12H14N2)4], is a new example of the well known [Cu4(μ4‐O)(μ‐X)6L4] class of complex (X− is Cl−, Br− or I−, and L is a monodentate ligand). The molecule has crystallographic C2 symmetry, with two Cl− ions on each edge of a Cu4 tetrahedron. Two of these, on opposite edges of the tetrahedron, accept intramolecular hydrogen bonds from two of the pyrazole N—H donors. 相似文献
12.
Da‐Hua Hu Wei Huang Kai Cui Yi‐Zhi Li Shao‐Hua Gou Ji‐Lin Yan 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(2):m91-m93
The title polymeric ladder complex, {[Cu2(C7H6NO2)2(C10H8N2)3(H2O)2](NO3)2·4H2O}n, has been synthesized and spectroscopically characterized. The polymeric nature of the compound involves two non‐equivalent 4,4′‐bipyridyl ligands acting as almost orthogonal bridges joining the metal coordination Jahn–Teller‐distorted octahedra, and forming ladders packed under the influence of hydrogen bonds involving the uncoordinated amino group of the p‐aminobenzoate ligand, the NO3− anion and the water molecules. 相似文献
13.
Kristof Seubert Dominik Böhme Jutta Kösters Wei‐Zheng Shen Eva Freisinger Prof. Dr. Jens Müller 《无机化学与普通化学杂志》2012,638(11):1761-1767
Metal‐mediated base pairs can be used to insert metal ions into nucleic acids at precisely defined positions. As structural data on the resulting metal‐modified DNA are scarce, appropriate model complexes need to be synthesized and structurally characterized. Accordingly, the molecular structures of nine transition metal complexes of N‐methyl‐2, 2'‐dipicolylamine (dipic) are reported. In combination with an azole‐containing artificial nucleoside, this tridentate ligand had recently been used to generate metal‐mediated base pairs (Chem. Commun. 2011 , 47, 11041–11043). The PdII and PtII complexes reported here confirm that the formation of planar complexes (as required for a metal‐mediated base pair) comprising N‐methyl‐2, 2'‐dipicolylamine is possible. Two HgII complexes with differing stoichiometry indicate that a planar structure might also be formed with this metal ion, even though it is not favored. In the complex [Ag2(dipic)2](ClO4)2, the two AgI ions are located close to one another with an Ag ··· Ag distance of 2.9152(3) Å, suggesting the presence of a strong argentophilic interaction. 相似文献
14.
You‐Ren Dong Xian‐Wen Wang Yue‐Qing Zheng 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):m19-m21
In the title novel mixed‐valence copper complex, {[Cu2(C8H2NO6)(C10H8N2)]·H2O}n, the CuI and CuII ions are linked by 4,4′‐bipyridine (bpy) and pyridine‐2,4,6‐tricarboxylate (ptc) ligands into corrugated layers, which are assembled via interlayer C—H⋯O hydrogen bonds to give a three‐dimensional supramolecular architecture. 相似文献
15.
Julienne Chaigneau Jerome Marrot Didier Riou 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(3):m101-m103
Crystals of the title tetramer, [Cu4(C7H3NO4)4(C7H5NO4)4(H2O)2], were synthesized hydrothermally at 433 K. The triclinic structure consists of tetrameric molecular species, which interact via strong hydrogen bonds. The CuII ions are distributed equally between one square‐pyramidal site and one octahedral site distorted by the Jahn–Teller effect. This coordination complex exhibits the peculiarity of having CuII ions linked to both the 2,6‐ and the 3,5‐isomers of pyridinedicarboxylic acid. 相似文献
16.
Sebastian Schmitz Natalya V. Izarova Claire Besson Jan van Leusen Paul Kgerler Kirill Yu. Monakhov 《无机化学与普通化学杂志》2019,645(4):409-415
A mononuclear complex [Cu(HL · S)2(NO3)2] ( 1 ) and a one‐ dimensional coordination polymer [Cu(HL · S)Cl2]n ( 2 ) [HL · S = 4‐(pyridin‐2‐ylmethyl)tetrahydro‐2H‐thiopyran‐4‐ol] showcase the structure‐directing role of the counterions in their formation reaction: monodentate ligation of NO3– and Cl– induces an octahedral (with two HL · S per Cu in 1 ) or trigonal‐bipyramidal (with one HL · S per Cu in 2 ) CuII coordination environment. In contrast to 1 exhibiting no coordinative metal–sulfur bonds in the crystal lattice (space group P21/c), 2 (P21/c) features intermolecular Cu–S contacts of 2.3188(7) Å. The coordination compounds are thermally stable up to ca. 160 °C. Whereas 1 demonstrates the spin‐like behavior of an isolated central CuII ion, compound 2 exhibits weak antiferromagnetic intra‐chain coupling with J ≈ –2.1 cm–1 between neighboring CuII ions. 相似文献
17.
Ingrid Socorro Antonia Neels Helen Stoeckli‐Evans 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(1):m13-m15
Bis[μ‐1‐(3‐pyridyl)ethanone oxime‐κ2N:N′]bis[nitratosilver(I)], [Ag2(NO3)2(C7H8N2O)2], crystallizes as a centrosymmetric binuclear macrocylic complex containing silver(I) ions bridged by the organic 1‐(3‐pyridyl)ethanone oxime ligand. The ligand coordinates via the pyridine and the oxime N atoms. A similar metal–ligand arrangement was found in the copper(I) complex catena‐poly[[bis[μ‐1‐(3‐pyridyl)ethanone oxime‐κ2N:N′]dicopper(I)]‐di‐μ‐iodo], [Cu2I2(C7H8N2O)2]n, but here the centrosymmetric macrocycles are connected by double anion bridges, resulting in the formation of a one‐dimensional coordination polymer. 相似文献
18.
Mojtaba Shamsipur Farhang Mizani Ali Akbar Saboury Hashem Sharghi Reza Khalifeh 《Electroanalysis》2007,19(5):587-596
Novel PVC membrane (PME) and coated graphite (CGE) Cu2+‐selective electrodes based on 5,6,7,8,9,10‐hexahydro‐2H‐1,13,4,7,10‐benzodioxatriazacyclopentadecine‐3,11(4H,12H)‐dione are prepared. The electrodes reveal a Nernstian behavior over wide Cu2+ ion concentration ranges (1.0×10?7–1.0×10?1 M for PME and 1.0×10?8–1.0×10?1 M for CGE) with very low limits of detection (7.8×10?8 M for PME and 9.1×10?9 M for CGE). The potentiometric responses are independent of the pH of the test solutions in the pH range 2.7–6.2. The proposed electrodes possess very good selectivities for Cu2+ over a wide variety of the cations including alkali, alkaline earth, transitions and heavy metal ions. The practical utility of the proposed electrodes have been demonstrated by their use in the study of interactions between copper ions and human growth hormone (hGH) in biological systems, potentiometric titration of copper with EDTA and determination of copper content of a sheep blood serum sample and some other real samples. 相似文献
19.
Gao‐Xiang Meng Ya‐Min Feng Xin‐Tang Huang 《Acta Crystallographica. Section C, Structural Chemistry》2014,70(8):823-827
The title compound, [Ag2(C6H4N4)(N3)]n, was obtained under hydrothermal conditions at 433 K. The asymmetric unit of the orthorhombic space group (Pna21) consists of two Ag+ cations, an anionic 5‐(pyridin‐4‐yl)tetrazolide (4‐ptz−) ligand and an anionic azide ligand. Both Ag+ centres are coordinated by four N atoms, forming a distorted tetrahedral coordination environment. When all the component ions are viewed as 4‐connected nodes, the whole three‐dimensional network can be regarded topologically as a new kind of 4,4,4,4‐connected net with the Schläfli symbol (4.85)(42.84)(43.83)2. 相似文献
20.
《Acta Crystallographica. Section C, Structural Chemistry》2017,73(5):363-368
Coordination polymers are constructed from two basic components, namely metal ions, or metal‐ion clusters, and bridging organic ligands. Their structures may also contain other auxiliary components, such as blocking ligands, counter‐ions and nonbonding guest or template molecules. The choice or design of a suitable linker is essential. The new title zinc(II) coordination polymer, [Zn(C5H5NO3P)Cl]n , has been hydrothermally synthesized and structurally characterized by single‐crystal X‐ray diffraction and vibrational spectroscopy (FT–IR and FT–Raman). Additionally, computational methods have been applied to derive quantitative information about interactions present in the solid state. The compound crystallizes in the monoclinic space group C 2/c . The four‐coordinated ZnII cation is in a distorted tetrahedral environment, formed by three phosphonate O atoms from three different (pyridin‐1‐ium‐3‐yl)phosphonate ligands and one chloride anion. The ZnII ions are extended by phosphonate ligands to generate a ladder chain along the [001] direction. Adjacent ladders are held together via N—H…O hydrogen bonds and offset face‐to‐face π–π stacking interactions, forming a three‐dimensional supramolecular network with channels. As calculated, the interaction energy between the neighbouring ladders is −115.2 kJ mol−1. In turn, the cohesive energy evaluated per asymmetric unit‐equivalent fragment of a polymeric chain in the crystal structure is −205.4 kJ mol−1. This latter value reflects the numerous hydrogen bonds stabilizing the three‐dimensional packing of the coordination chains. 相似文献