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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/28933505/sbvo4-nanoparticles-synthesized-via-three-facile-one-pot-methods-controllable-morphologies-and-superhydrophobic-coatings
#1
Ximeng Liu, Xiaojuan Yang, Feng Li, Taohai Li, Wei Cao
Inert colloidal SbVO4 with special morphologies is promising for practical superhydrophobic coatings. However, its conventional synthesis suffers from harsh preparation conditions, limiting the material applications. Herein, by using K6V10O28·9H2O as a novel vanadium source, SbVO4 nanoparticles were prepared through three different facile methods: hydrothermal method, reflux method and ultrasonic method. The pH values of the reaction environment were tuned as the only variable to shape the final products. Colloidal morphologies can be engineered to microflakes, or amalgamations of nanoparticles...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933494/catalyst-free-room-temperature-iclick-reaction-of-molybdenum-ii-and-tungsten-ii-azide-complexes-with-electron-poor-alkynes-structural-preferences-and-kinetic-studies
#2
Paul Schmid, Matthias Maier, Hendrik Pfeiffer, Anja Belz, Lucas Henry, Alexandra Friedrich, Fabian Schönfeld, Katharina Edkins, Ulrich Schatzschneider
Two isostructural and isoelectronic group VI azide complexes of the general formula [M(η(3)-allyl)(N3)(bpy)(CO)2] with M = Mo, W and bpy = 2,2'-bipyridine were prepared and fully characterized, including X-ray structure analysis. Both reacted smoothly with electron-poor alkynes such as dimethyl acetylenedicarboxylate (DMAD) and 4,4,4-trifluoro-2-butynoic acid ethyl ester in a catalyst-free room-temperature iClick [3 + 2] cycloaddition reaction. Reaction with phenyl(trifluoromethyl)acetylene, on the other hand, did not lead to any product formation...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933485/synthesis-characterization-and-catalytic-epoxidation-properties-of-lanthanide-stabilized-peroxoisopolytungstates
#3
Jipeng Guo, Yanjun Niu, Lanying Song, Qiaofei Xu, Jingkun Lu, Pengtao Ma, Dongdi Zhang, Chao Zhang, Jingyang Niu, Jingping Wang
A series of new lanthanide-containing peroxoisopolyoxotungstates, K6Na4[H32{Ln4(WO4)(H2O)16[W7O22(O2)2]4}3]·105H2O [Ln = Ce(III) (1), Nd(III) (2), Sm(III) (3), Tb(III) (4), Er(III) (5)], have been successfully synthesized and structurally characterized. All polyanions [Ln(WO4)(H2O)16{W7O22(O2)2}4](14-) are isostructural and consist of a central [Ln(WO4)(H2O)16](10+) cluster surrounded by four peripheral [W7O22(O2)2](6-) units. They could act as efficient recyclable catalysts for the epoxidation of various alkenes including different cycloalkenes, styrene derivatives, internal and long-chain alkenes...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933481/bowl-shaped-deformation-in-a-planar-aromatic-polycycle-upon-reduction-li-and-na-separated-dianions-of-the-aromatic-polycycle-5-6-11-12-di-o-phenylene-tetracene
#4
T Wombacher, R Goddard, C W Lehmann, J J Schneider
Herein we report the synthesis and crystal structures of three light alkali metal salts of the dianion of the polycyclic aromatic hydrocarbon 5,6:11,12-di-o-phenylenetetracene (LDOPT). The compounds are obtained by reaction of LDOPT with an excess of lithium or sodium metal in different O-donor solvents (DME, diglyme) and crystallize as naked, solvated-cation separated dianions exhibiting no interaction between the alkali metal ion and the aromatic π-system of LDOPT. Depending on the aprotic etheral solvent and the hardness of the alkaline metal agent a significant structural perturbation of the conjugated carbon framework of LDOPT is observed resulting in a bowl shaped curvature of the anionic π-perimeter, in contrast to its fully planar neutral state...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933480/two-photon-spectroscopy-of-tungsten-0-arylisocyanides-using-nanosecond-pulsed-excitation
#5
Kana Takematsu, Sara A M Wehlin, Wesley Sattler, Jay R Winkler, Harry B Gray
The two-photon absorption (TPA) cross sections (δ) for tungsten(0) arylisocyanides (W(CNAr)6) were determined in the 800-1000 nm region using two-photon luminescence (TPL) spectroscopy. The complexes have high TPA cross sections, in the range 1000-2000 GM at 811.8 nm. In comparison, the cross section at 811.8 nm for tris-(2,2'-bipyridine)ruthenium(ii), [Ru(bpy)3](2+), is 7 GM. All measurements were performed using a nanosecond-pulsed laser system.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933477/a-cobalt-ii-heteroarylalkenolate-precursor-for-homogeneous-co3o4-coatings-by-atomic-layer-deposition
#6
Mehtap Büyükyazi, Thomas Fischer, Penmgei Yu, Mariona Coll, Sanjay Mathur
We present a new and efficient cobalt precursor, Co(II)(DMOCHCOCF3)2, to prepare Co3O4 thin films and conformal coatings. In the synthesis of this Co complex, heteroaryl moieties and CF3-groups were combined leading to the precursor with high thermal stability and volatility. The suitability of this precursor for ALD deposition was tested on flat silicon substrates and TiO2/C nanofibers upon process optimization. Deposition at 200 °C results in homogeneous and smooth Co3O4 thin films with a growth rate of 0...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933475/two-nanoscale-nb-containing-polyoxometalates-based-on-p2w15nb3o62-clusters-and-chromium-cations
#7
Peng Huang, Xin-Long Wang, De-Qing He, Hai-Yang Wu, Chao Qin, Meng Du, Chao Lai, Zhong-Min Su
Two novel mixed-addenda Nb/W polyoxometalates are successfully fabricated, and investigated as anode materials for lithium-ion batteries. For the Cs5K4{Cr3(H2O)12[P2W15Nb3O62]2}·60H2O sample, a reversible capacity (466.6 mA h g(-1)) and stable cycle performance are obtained.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932853/the-role-of-ligand-redox-non-innocence-in-ring-opening-polymerization-reactions-catalysed-by-bis-imino-pyridine-iron-alkoxide-complexes
#8
K R Delle Chiaie, A B Biernesser, M A Ortuño, B Dereli, D A Iovan, M J T Wilding, B Li, C J Cramer, J A Byers
The reactivity of iron-based ring opening polymerization catalysts is compared when the catalyst is in three different oxidation states. Formally iron(i) monoalkoxide complexes 3a (p-methoxyphenoxide) and 3b (neopentoxide) supported by bis(imino)pyridine ligands were synthesized and investigated as catalysts for the ring opening polymerization and copolymerization of various monomers. For most monomers, 3a and 3b were superior catalysts compared to analogous, formally iron(ii) and iron(iii) complexes (1a/1b and 2a/2b, respectively) for the ring opening polymerization of various cyclic ester and cyclic carbonate monomers...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932846/a-reactive-oxygen-species-generating-cyclooxygenase-2-inhibiting-cancer-stem-cell-potent-tetranuclear-copper-ii-cluster
#9
C Lu, K Laws, A Eskandari, K Suntharalingam
Tetranuclear copper(ii) complexes containing multiple diclofenac and Schiff base moieties, 1-4, are shown to kill bulk cancer cells and cancer stem cells (CSCs) with low micromolar potency. The most effective complex, 1, elicits its cytotoxic effect by elevating the intracellular reactive oxygen species (ROS) levels and inhibiting cyclooxygenase-2 (COX-2) expression.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932841/allowing-the-direct-interaction-of-n-aryl-%C3%AE-diimines-with-a-high-valent-metal-chloride-one-pot-wcl6-promoted-formation-of-quinoxalinium-salts
#10
Niccolò Bartalucci, Marco Bortoluzzi, Tiziana Funaioli, Fabio Marchetti, Guido Pampaloni, Stefano Zacchini
The full potential of a high valent metal chloride as both a chlorinating and an oxidative agent was explored by allowing WCl6 to react with N-(2,6-diisopropylphenyl) α-diimines, in CH2Cl2 at room temperature. These α-diimines underwent unprecedented conversion to quinoxalinium cations via intramolecular C-N coupling.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932839/the-fluorescence-properties-of-tiara-like-structural-thiolated-palladium-clusters
#11
Jishi Chen, Yanze Pan, Zonghua Wang, Peng Zhao
A series of tiara like structural Pdn(SR)2n (5 ≤ n ≤ 20) nanoclusters were synthesized by using a modified Brust-Schiffrin route and isolated via thin layer chromatography, and further measured using MALDI-MS. A new crystal structure of tiara like structural Pd6(SC2H4Ph)12 was determined by single-crystal X-ray crystallography. The atomic distance of PdPd increased and the Pd-S bond length decreased with the increase in the n value in the optimized structure of Pdn(SR)2n (5 ≤ n ≤ 10), which were optimized by density functional theory at the B3LYP level...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932836/recent-advances-in-structural-studies-of-heterometallic-uranyl-containing-coordination-polymers-and-polynuclear-closed-species
#12
Pierre Thuéry, Jack Harrowfield
An overview is given of recent structural studies on heterometallic uranyl-containing species, with particular emphasis on those formed with carboxylate ligands, showing the effect of the additional metal cations and ancillary ligands on the dimensionality, geometry and topology of the assemblies generated. These examples illustrate the level of elaboration which is now possible in the design and synthesis of both uranyl clusters and coordination polymers, properties and potential applications of which are also briefly discussed...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932832/coexistence-of-long-range-antiferromagnetic-order-and-slow-relaxation-of-the-magnetization-in-the-first-lanthanide-complex-of-a-1-2-4-benzotriazinyl-radical
#13
Ian S Morgan, Akseli Mansikkamäki, Mathieu Rouzières, Rodolphe Clérac, Heikki M Tuononen
The first lanthanide complex of a 1,2,4-benzotriazinyl radical (1), Dy(1)(tbacac)3 (2, tbacac = 2,2,6,6-tetramethyl-3,5-heptane-dionato), was synthesised and found to have an antiferromagnetically ordered ground state with a metamagnetic phase diagram and a critical field of 0.91 T at 1.85 K. The application of a small dc field revealed the single-molecule magnet behaviour of 2, illustrating the coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28929158/ru-os-dyads-based-on-a-mixed-bipyridine-terpyridine-bridging-ligand-modulation-of-the-rate-of-energy-transfer-and-ph-induced-luminescence-switching-in-the-infrared-domain
#14
Manoranjan Bar, Dinesh Maity, Sourav Deb, Shyamal Das, Sujoy Baitalik
A series of heterobimetallic complexes of compositions [(bpy/phen)2Ru(dipy-Hbzim-tpy)Os (tpy-PhCH3/H2pbbzim)](4+) (bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, tpy-PhCH3 = 4'-(4-methylphenyl)-2,2':6',2''-terpyridine and H2pbbzim = 2,6-bis(benzimidazole-2-yl)pyridine)), derived from a heteroditopic bpy-tpy bridging ligand, were synthesized and thoroughly characterized in this work. The heterometallic complexes exhibit two successive one-electron reversible metal-centered oxidations corresponding to Os(II)/Os(III) at lower potential and Ru(II)/Ru(III) at higher potential...
September 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926065/isomerisation-reactivity-and-coordination-chemistry-of-a-new-hybrid-multi-functional-phosphazane
#15
Alex J Plajer, Kevin Bold, Felix J Rizzuto, Raúl García-Rodríguez, Tanya K Ronson, Dominic S Wright
The unsymmetric P(III)/P(V) cyclodiphosphazane framework [(S[double bond, length as m-dash])(H)P(μ-N(t)Bu)2PNH(t)Bu] (2) provides entry into the mixed chalgogenide dianion [(S)P(μ-N(t)Bu)2P(Se)N(t)Bu](2-), and unique insight into the mechanisms of cis/trans isomerism in phosph(iii)- and phosph(v)-azanes.
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926060/mg-doped-li2fesio4-c-nanocomposites-synthesized-by-the-solvothermal-method-for-lithium-ion-batteries
#16
Ajay Kumar, O D Jayakumar, Jagannath, Parisa Bashiri, G A Nazri, Vaman M Naik, Ratna Naik
A series of porous Li2Fe1-xMgxSiO4/C (x = 0, 0.01, 0.02, 0.04) nanocomposites (LFS/C, 1Mg-LFS/C, 2Mg-LFS and 4Mg-LFS/C) have been synthesized via a solvo-thermal method using the Pluronic P123 polymer as an in situ carbon source. Rietveld refinement of the X-ray diffraction data of Li2Fe1-xMgxSiO4/C composites confirms the formation of the monoclinic P21 structure of Li2FeSiO4. The addition of Mg facilitates the growth of impurity-free Li2FeSiO4 with increased crystallinity and particle size. Despite having the same percentage of carbon content (∼15 wt%) in all the samples, the 1Mg-LFS/C nanocomposite delivered the highest initial discharge capacity of 278 mA h g(-1) (∼84% of the theoretical capacity) at the C/30 rate and also exhibited the best rate capability and cycle stability (94% retention after 100 charge-discharge cycles at 1C)...
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926052/pseudo-electron-deficient-organometallics-limited-reactivity-towards-electron-donating-ligands
#17
Anaïs Pitto-Barry, Alexandru Lupan, Markus Zegke, Thomas Swift, Amr A A Attia, Rianne M Lord, Nicolas P E Barry
Half-sandwich metal complexes are of considerable interest in medicinal, material, and nanomaterial chemistry. The design of libraries of such complexes with particular reactivity and properties is therefore a major quest. Here, we report the unique and peculiar reactivity of eight apparently 16-electron half-sandwich metal (ruthenium, osmium, rhodium, and iridium) complexes based on benzene-1,2-dithiolato and 3,6-dichlorobenzene-1,2-dithiolato chelating ligands. These electron-deficient complexes do not react with electron-donor pyridine derivatives, even with the strong σ-donor 4-dimethylaminopyridine (DMAP) ligand...
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926047/simple-znet2-as-a-catalyst-in-carbodiimide-hydroalkynylation-structural-and-mechanistic-studies
#18
Antonio Martínez, Sonia Moreno-Blázquez, Antonio Rodríguez-Diéguez, Alberto Ramos, Rafael Fernández-Galán, Antonio Antiñolo, Fernando Carrillo-Hermosilla
Expanding the possibilities of the use of simple and available ZnEt2 as a catalyst, the hydroalkynylation of carbodiimides with a variety of alkynes to obtain unsaturated substituted amidines is described in this work. Different stoichiometric studies allow proposing that amidinate complexes are intermediates in this catalytic process, produced by easy activation of the C-H bond of the alkyne and formation of alkynyl derivatives followed by a carbodiimide insertion step. Kinetics studies allowed the generation of a rate law for the hydroalkynylation of N,N'-diisopropylcarbodiimide with phenylacetylene which is second order in [carbodiimide], first order in [catalyst] and zero order in [alkyne], with a negligible PhC[triple bond, length as m-dash]CH/PhC[triple bond, length as m-dash]CD isotopic effect, consistent with a rate-determining state involving carbodiimide insertion...
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926046/long-range-magnetic-ordering-in-a-metal-organic-framework-based-on-octanuclear-nickel-ii-clusters
#19
Jun-Li Wang, Yan Bai, Hui Pan, Guang-Shui Zheng, Dong-Bin Dang
A novel three-dimensional metal-organic framework [Ni3(BTC)2(bpp)2(H2O)]·3H2O (1) based on mixed ligands H3BTC (1,2,4-benzenetricarboxylic acid) and bpp (1,3-bis(4-pyridyl)propane) was obtained under hydrothermal conditions. Crystal structure analysis reveals that 1 is a framework based on cage-like Ni8(COO)12 units. Furthermore, long-range magnetic ordering is observed at low temperature.
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28926045/fluorite-type-coordination-compound-as-iodide-ion-conductor-crystal-structure-and-ionic-conductivity
#20
Xin Chen, Chen Xue, Shao-Xian Liu, Jian-Lan Liu, Zhi-Yuan Yao, Xiao-Ming Ren
The solid state electrolytes show a wide range of practical applications in a variety of all-solid-state electrochemical devices, and it is highly in demand to explore new types of solid state electrolyte materials. In this study, we have designed and prepared a fluorite-type coordination compound, [Mn(en)3]I2, which has been characterized by microanalysis for C, H and N elements, infrared spectrum in the wavenumber range of 4000-400 cm(-1), thermogravimetric analysis and differential scanning calorimetry. The single crystal X-ray diffraction revealed that the bigger size [Mn(en)3](2+) cations build three-dimensional network in the crystal of [Mn(en)3]I2 and the smaller size iodide ions occupy the tetrahedral or octahedral cavities surrounded by the [Mn(en)3](2+) cations, featuring as the fluorite-type compound...
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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