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141.
Zhanna DobrokhotovaAnna Emelina Aleksei SidorovGrigory Aleksandrov Mikhail Kiskin Pavel KoroteevMikhail Bykov Marat FazylbekovArtem Bogomyakov Vladimir NovotortsevIgor Eremenko 《Polyhedron》2011,30(1):132-141
Lithium-containing heterometallic complexes with cobalt (Li2Co2(Piv)6(2,4-Lut)2 (2, Piv is the pivalate anion) and Li2Co2(O2CCH2But)6(2,4-Lut)2 (3)) and with nickel (Li2Ni2(Piv)6(DME)2 (4) and Li2Ni2(Piv)6(2,2′-bpy)2 (5)) were synthesized. The structures of the complexes were established by X-ray diffraction. The magnetic properties of complexes 2 and 4 were studied. The thermal behavior of compounds 2, 3, and 5 was investigated. It was shown that the compounds under study can be used as molecular precursors for the synthesis of lithium cobaltate and nickelate. 相似文献
142.
You-Gui Huang Min-Yan Wu Wei Wei Qiang Gao Da-Qiang Yuan Fei-Long Jiang Mao-Chun Hong 《Journal of Molecular Structure》2008,885(1-3):23-27
Two 3D Ln(III)–Cu(II) coordination polymers [Er2Cu3(pydc)6(H2O)6]n (1) and [Tb2Cu3(pydc)6(H2O)6]n (2) were hydrothermally prepared from pyridine-2,4-dicarboxylic acid (H2pydc) and characterized by single-crystal X-ray diffraction analysis. The magnetic studies show that an unexpected ferromagnetic interaction between metal centers exists in 1 while 2 behaves as an antiferromagnet. 相似文献
143.
Michela L. Maiola Prof. Joshua A. Buss 《Angewandte Chemie (International ed. in English)》2023,62(48):e202311721
We employ a metal-metal salt metathesis strategy to access low-valent tantalum-copper heterometallic architectures (Ta−μ2-H2−Cu and Ta−μ3-H2−Cu3) that emulate structural elements proposed for surface alloyed nanomaterials. Whereas cluster assembly with carbonylmetalates is well precedented, the use of the corresponding polyarene transition metal anions is underexplored, despite recognition of these highly reactive fragments as storable sources of atomic Mn−. Our application of this strategy provides structurally unique early-late bimetallic species. These complexes incorporate bridging hydride ligands during their syntheses, the origin of which is elucidated via detailed isotopic labelling studies. Modification of ancillary ligand sterics and electronics alters the mechanism of bimetallic assembly; a trinuclear complex resulting from dinuclear C−H activation is demonstrated as an intermediate en route to formation of the bimetallic. Further validating the promise of this rational, bottom-up approach, a unique tetranuclear species was synthesized, featuring a Ta centre bearing three Ta−Cu interactions. 相似文献
144.
《Journal of Coordination Chemistry》2012,65(17):3040-3049
A new heterometallic antimony–samarium complex, [Sb2(edta)2Sm(H2O)4]NO3?·?3.55H2O (edta?=?ethylenediaminetetraacetate) (1), has been synthesized and characterized by elemental analyses (EA), Fourier transform infrared spectroscopy, thermogravimetry-differential scanning calorimetry, and X-ray crystallography. The X-ray crystal structure analysis reveals that in 1 the bridging carboxylate-O,O′ of edta4? connects samarium(III) and antimony(III) to form 2-D sheets. The 2-D sheets are further linked by bridging carboxylates from adjacent layers, resulting in 3-D coordination polymers. Complex 1 exhibits fluorescence in the solid state at room temperature. 相似文献
145.
《Journal of Coordination Chemistry》2012,65(19):3469-3480
A cyano-bridged heterometallic lanthanide-transition metal nitrosyl complex, [Pr(phen)2(MeOH)(H2O)2][Fe(CN)5(NO)]?·?(Phen)(DMF)(MeOH)(H2O) (Phen?=?1,10-phenanthroline and DMF?=?dimethylformamide), has been synthesized from reaction of PrCl3?·?6H2O with 1,10-phenanthroline in methanol and sodium nitroprusside followed by crystallization from DMF. The crystal structure shows that the complex is a 1-D chain, stabilized by coordination, hydrogen-bonding, and π–π stacking interactions. The complex shows nuclease activity with pUC19 supercoiled DNA in DMF/Tris-HCl buffer in the presence of H2O2. 相似文献
146.
《Journal of Coordination Chemistry》2012,65(7):997-1004
A lanthanide-transition heterometallic supramolecular complex {Eu(DMF)4(H2O)2Cr(CN)6·H2O} n (1) has been synthesized based on the reaction of K3[Cr(CN)6], N,N-dimethylformamide (DMF) and Eu(NO3)3·6H2O. 1 crystallizes in the monoclinic space group P2(1)/c with a=13.130(6)Å, b=12.923(7)Å, c=19.184(9)Å and Z=4. In 1 each Eu(III) is eight-coordinate with six oxygen atoms from four DMF molecules and two H2O molecules and two nitrogen atoms from two cis-bridging CN ligands to form a distorted dodecahedron. 1 has a three-dimensional network created by the incorporation of coordinative linkage, three inter-molecular and an intrachain hydrogen bond. 相似文献
147.
《Journal of Coordination Chemistry》2012,65(21):2343-2350
The heterometallic Ln(III)–Cu(II) coordination polymers [CuLn2(IN)8(H2O)4] n (IN?=?isonicotinate, Ln?=?Gd (1), Dy (2), Er(3)) have been synthesized by hydrothermal reactions and characterized by elemental analysis, IR and single crystal X-ray diffraction. The compounds are isomorphous and crystallize in monoclinic space group P21/c, adopting a one-dimensional chain structure with alternately arranged [Ln2(IN)6(H2O)4] and [Cu(IN)2] building blocks bridged by isonicotinates. Temperature-dependent magnetic susceptibility for complex 1 was studied, and a very weak ferromagnetic interaction between metal ions was observed. 相似文献
148.
Zn.V. Dobrohotova M.A. Kiskin G.G. Aleksandrov A.V. Tyurin M.A. Bykov I.P. Malkerova V.M. Novotortsev 《Journal of solid state chemistry》2010,183(10):2475-2482
The reaction of lithium pivalate, polymeric cobalt pivalate [Co(Piv)2]n, and triethylamine in THF at 60 °С afforded the new heterometallic antiferromagnetic complex Li2Co2(Piv)6(NEt3)2 (2). The molecular and crystal structure of complex 2 was established and its magnetic behavior was studied. The vaporization and solid-state thermolysis of 2 were investigated. The thermodynamic characteristics of complex 2 were determined. The results of the present study show that complex 2 can be used as a potential molecular precursor for the synthesis of thin films of lithium cobaltate LiCoO2. 相似文献
149.
Yang Guo Yue Ma Na Zhou Zhan‐Quan Liu Qing‐Lun Wang Shi‐Ping Yan Dai‐Zheng Liao Prof. Dr. 《无机化学与普通化学杂志》2010,636(5):865-871
To investigate the influence of the non‐covalent interactions, such as hydrogen‐bonding, π–π packing and d10–d10 interactions in the supramolecular motifs, three cyanido‐bridged heterobimetallic discrete complexes {Mn(bipy)2(H2O)[Ag(CN)2]}[Ag(CN)2] ( 1 ), {Mn(phen)2(H2O)[Au(CN)2]}2[Au(CN)2]2 · 4H2O ( 2 ), and {Cd(bipy)2(H2O)[Au(CN)2]}[Au(CN)2] ( 3 ) (bipy = 2,2′‐bipyridine, and phen = 1,10‐phenanthroline), which are based on dicyanidometallate(I) groups with 1:2 stoichiometry of metal ions and 2,2′‐bipyridyl‐like co‐ligands were synthesized and structurally characterized. In compound 1 , hydrogen bonding and π–π interactions governed the supramolecular contacts. In compound 2 , the incorporation of aurophilic, hydrogen bonding and π–π interactions result in a 3D supramolecular network. In compound 3 , hydrogen bonding and π–π stacking interactions result in a 2D supramolecular layer. In the three complexes, hydrogen‐bonding, π–π packing and/or d10–d10 interactions can play important roles in increasing the dimensionality of supramolecular assemblies. 相似文献
150.
Kyoung Chul Park Prof. Dr. Preecha Kittikhunnatham Dr. Jaewoong Lim Grace C. Thaggard Yuan Liu Dr. Corey R. Martin Dr. Gabrielle A. Leith Donald J. Toler Dr. An T. Ta Dr. Nancy Birkner Dr. Ingrid Lehman-Andino Dr. Alejandra Hernandez-Jimenez Dr. Gregory Morrison Dr. Jake W. Amoroso Prof. Dr. Hans-Conrad zur Loye Dr. Dave P. DiPrete Dr. Mark D. Smith Prof. Dr. Kyle S. Brinkman Prof. Dr. Simon R. Phillpot Prof. Dr. Natalia B. Shustova 《Angewandte Chemie (International ed. in English)》2023,62(5):e202216349
A novel series of heterometallic f-block-frameworks including the first examples of transuranic heterometallic 238U/239Pu-metal–organic frameworks (MOFs) and a novel monometallic 239Pu-analog are reported. In combination with theoretical calculations, we probed the kinetics and thermodynamics of heterometallic actinide(An)-MOF formation and reported the first value of a U-to-Th transmetallation rate. We concluded that formation of uranyl species could be a driving force for solid-state metathesis. Density of states near the Fermi edge, enthalpy of formation, band gap, proton affinity, and thermal/chemical stability were probed as a function of metal ratios. Furthermore, we achieved 97 % of the theoretical maximum capacity for An-integration. These studies shed light on fundamental aspects of actinide chemistry and also foreshadow avenues for the development of emerging classes of An-containing materials, including radioisotope thermoelectric generators or metalloradiopharmaceuticals. 相似文献