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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/27934986/a-unique-copper-ii-assisted-transformation-of-acetylacetone-dioxime-in-acetone-that-leads-to-one-dimensional-quinoxaline-bridged-coordination-polymers
#1
Zoi G Lada, Amaia Soto Beobide, Aikaterini Savvidou, Catherine P Raptopoulou, Vassilis Psycharis, George A Voyiatzis, Mark M Turnbull, Spyros P Perlepes
The reactions of copper(ii) carboxylate sources with acetylacetone dioxime (acacdoH2) in Me2CO have been studied and a novel, metal ion-assisted ligand transformation has been discovered. The reaction of [Cu2(diba)4(dibaH)2] and acacdoH2 (1 : 1.5) in Me2CO has provided access to the complex {[Cu2(diba)4(qunx)]}n (1) in low yield (25-30%), where dibaH is 3,3-dimethylbutyric acid and qunx is quinoxaline. The [Cu2(piv)4(pivH)2]/acacdoH2 (1 : 1.5) reaction system in warm Me2CO, where pivH is pivalic acid, gave the analogous complex {[Cu2(piv)4(qunx)]}n (2) in moderate yield (∼50%)...
December 9, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27934983/syntheses-structures-and-magnetic-properties-of-nine-coordination-polymers-based-on-terphenyl-tetracarboxylic-acid-ligands
#2
Xinhui Zhou, Qianqian Chen, Baolin Liu, Liang Li, Tao Yang, Wei Huang
Nine coordination polymers (CPs) [Mn(H3L)(H2L)0.5(phen)]n (1), [Ni2L(phen)2(μ2-H2O)]n (2), {[Mn2L(phen)2]·(DMA)(H2O)}n (3), {[Co2L(μ2-H2O)(μ2-DMA)]·DMF}n (4), [CoL0.5(H2O)(phen)]n (5), {[Ni2L(μ2-H2O)(μ2-DMA)]·DMA}n (6), {[Co2L(μ2-H2O)(μ2-DMA)]·DMA}n (7), {[Ni2L(μ2-H2O)(H2O)2(DMF)2]·(H2O)2(DMF)}n (8), and {[Ni4L2(μ2-H2O)4(H2O)2]·(H2O)2(NMP)}n (9) (H4L = 1,1':4',1''-terphenyl-2',4,4'',5'-tetracarboxylic acid, DMA = N,N-dimethylacetamine, DMF = N,N-dimethylformamide, NMP = N-methyl-2-pyrrolidone, phen = 1,10-phenanthroline) have been synthesized and structurally characterized...
December 9, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27934982/shape-electronic-structure-and-steric-effects-of-organometallic-nanocatalysts-relevant-tools-to-improve-the-synergy-between-theory-and-experiment
#3
Lucy Cusinato, Iker Del Rosal, Romuald Poteau
Working closely with experimentalists on the comprehension of the surface properties of catalytically active organometallic nanoparticles (NPs) requires the development of several computational strategies which significantly differ from the cluster domain where a precise knowledge of their optimal geometry is a mandatory prerequisite to computational modeling. Theoretical simulations can address several properties of organometallic nanoparticles: the morphology of the metal core, the surface composition under realistic thermodynamic conditions, the relationship between adsorption energies and predictive descriptors of reactivity...
December 9, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929587/highly-efficient-electrochemiluminescence-based-on-4-amino-1-2-4-triazole-schiff-base-two-dimensional-zn-cd-coordination-polymers
#4
Shu-Hua Zhang, Ji-Ming Wang, Hai-Yang Zhang, Yi-Peng Fan, Yu Xiao
Four coordination polymers, formulated as [Zn(L(1))2]n (1), [Cd(L(1))2]n (2), [Zn(L(2))2]n (3) and [Cd(L(2))2]n (4) (HL1 is (E)-2-(((4H-1,2,4-triazol-4-yl)imino)methyl)-4,6-dibromophenol; HL2 is (E)-2-(((4H-1,2,4-triazol-4-yl)imino)methyl)-4,6-dichlorophenol) have been synthesized through vial reactions. The four compounds were structurally characterized by single crystal X-ray diffraction, elemental analysis, PXRD, and fluorescence spectroscopy. For 1-4, a detailed analysis of Hirshfeld surfaces and fingerprint plots facilitates a comparison of intermolecular interactions, which are crucial in building different supramolecular architectures...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929585/recovery-of-uranium-vi-from-aqueous-solutions-using-a-modified-honeycomb-like-porous-carbon-material
#5
Jiahui Zhu, Qi Liu, Zhanshuang Li, Jingyuan Liu, Hongsen Zhang, Rumin Li, Jun Wang, G A Emelchenko
Researchers have focused their attention on environment-friendly adsorption materials to solve the energy shortage problem and guarantee the sustainable development of human society. For that matter, pomelo peel, which is a low-cost and universal biomass waste, can be used as an effective carbon source with a large specific surface area. In this paper, a novel composite adsorbent, consisting of a three-dimensional honeycomb-like porous carbon material and MnO2 nanowires (HLPC/MnO2), has been successfully synthesized using alkaline activation followed by a carbonization procedure at high temperatures and in situ growth of MnO2 nanowires...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929173/novel-mitochondria-targeted-copper-ii-complexes-of-ferrocenyl-terpyridine-and-anticancer-active-8-hydroxyquinolines-showing-remarkable-cytotoxicity-dna-and-protein-binding-affinity
#6
Banashree Deka, Tukki Sarkar, Samya Banerjee, Arun Kumar, Sanjoy Mukherjee, Sasanka Deka, Kandarpa K Saikia, Akhtar Hussain
Metal complexes with organelle specificity and potent but selective cytotoxicity are highly desirable. In this work, we report the synthesis, characterization and cytotoxicity of six novel copper(ii) complexes of the formula [Cu(R-tpy)(N-O)]NO3 (1-6), where R-tpy is 4'-phenyl-2,2':6',2''-terpyridine (Ph-tpy; 1-3) or 4'-ferrocenyl-2,2':6',2''-terpyridine (Fc-tpy; 4-6), N-O is the anion of 8-hydroxyquinoline (HQ in 1, 4), 5-chloro-7-iodo-8-hydroxyquinoline (CQ in 2, 5) or 5-nitro-8-hydroxyquinoline (NQ in 3, 6)...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929171/biobr-nanoplates-tio2-nanowires-carbon-fiber-cloth-as-a-functional-water-transport-network-for-continuous-flow-water-purification
#7
Yan Mei, Yanhui Su, Zheng Li, Shiqi Bai, Mengyu Yuan, Lu Li, Zheng Yan, Jun Wu, Lian-Wen Zhu
A novel BiOBr@TiO2/carbon hybrid framework as a continuous flow sunlight water purification system has been reported in the present work. The BiOBr@TiO2/carbon hybrid framework was fabricated via the sequential growth of TiO2 nanowires and BiOBr nanoplates on carbon fiber cloth. TiO2 nanowires interweaved with carbon fibers to form a porous network, while BiOBr nanoplates were arrayed on TiO2 nanowires. The obtained BiOBr@TiO2/carbon hybrid framework possesses numerous micro/nanochannels between their adjacent one-dimensional building blocks, which can serve as an effective water transport network driven by capillary force...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27929170/cyclometalated-ir-iii-complexes-containing-quinoline-benzimidazole-based-n-n-ancillary-ligands-structural-and-luminescence-modulation-by-varying-the-substituent-groups-or-the-protonation-deprotonation-state-of-imidazole-units
#8
Dan-Ping Gong, Tai-Bao Gao, Deng-Ke Cao, Michael D Ward
Cyclometalated Ir(iii) complexes [Ir(dfppy)2(qbiH)](PF6) (1), [Ir(dfppy)2(qbim)](PF6)·H2O (2), [Ir(dfppy)2(qbio)](PF6) (3) and [Ir(dfppy)2(qbi)] (4) have been designed and prepared, in which the N^N ligands qbiH, qbim and qbio incorporate different substituent groups R on their imidazole units (H atom, CH3 group and n-C8H17 group, respectively) in order to explore the influence of the substituent groups R and the protonation/deprotonation state of imidazole units in these Ir(iii) complexes on their structures and luminescence behaviors...
December 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924996/n-heterocyclic-carbene-or-phosphorus-ylide-which-one-forms-a-stronger-bond-with-group-11-metals-a-theoretical-study
#9
Mehdi Bayat, Asieh Sedghi, Leila Ebrahimkhani, Seyyed Javad Sabounchei
N-Heterocyclic carbene and phosphorus ylides are inorganic and organometallic ligands, and their coordination chemistry with transition elements, particularly group 11 metals, would be noticeable. This study seeks to characterize the structure and nature of the C→M bond of group 11 metals (M = Cu(i), Ag(i), Au(i)) in coordination with different monodentate phosphorus ylides {P(Ph)3CHR} and N-heterocyclic carbenes (NHC(R)) (where R = F, Cl, Br, CF3, CH3, H, C(CH3)3, Si(CH3)3, SiH3, Ph). In this regard, DFT calculations with the PBE/def2-TZVP level of theory were applied...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924994/spin-crossover-between-high-spin-s-5-2-and-low-spin-s-1-2-states-in-six-coordinate-iron-iii-porphyrin-complexes-having-two-pyridine-n-oxide-derivatives
#10
Yuki Ide, Nami Murai, Hiroki Ishimae, Masaaki Suzuki, Shigeki Mori, Masashi Takahashi, Mikio Nakamura, Katsumi Yoshino, Takahisa Ikeue
In contrast to the general tendency that six coordinate iron(iii) porphyrin complexes with neutral oxygen ligands adopt a high-spin state in a wide range of temperature, some complexes with substituted pyridine N-oxides have exhibited spin-crossover from high-spin to low-spin states with decreasing temperature both in solution and in the solid state.
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924993/solution-and-solid-state-structures-and-magnetism-of-a-series-of-linear-trinuclear-compounds-with-a-hexacoordinate-ln-iii-and-two-terminal-ni-ii-centers
#11
Peter Comba, Markus Enders, Michael Großhauser, Markus Hiller, Dennis Müller, Hubert Wadepohl
Reported are the syntheses, structures and magnetic properties, also by NMR spectroscopy in solution, of a series of 13 linear trinuclear 3d-4f compounds with a lanthanide(iii) surrounded by two Ni(II) ions, NiLn(III), where the central Ln(III) is hexacoordinate. For three of the crystal structures, an additional H2O molecule is coordinated to the central Ln(III) ion, leading to a monocapped trigonal prismatic structure. However, NMR spectroscopy indicates that in solution, these complexes also have a hexacoordinate Ln(III) center...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924992/p-n-depleted-bulk-biobr-%C3%AE-fe2o3-heterojunctions-applied-for-unbiased-solar-water-splitting
#12
Hua-Yan Si, Chen-Jing Mao, Ya-Meng Xie, Xiu-Guo Sun, Jin-Jin Zhao, Na Zhou, Jian-Qiang Wang, Wen-Jie Feng, Yan-Ting Li
P-N depleted bulk BiOBr/α-Fe2O3 heterojunction (DBH) nanostructures with the growth of (001) BiOBr facets were prepared via a simple hydrothermal method. BiOBr possesses an average thickness of around 50 nm and shows preferential exposure of the (001) facets. α-Fe2O3 nanoparticles, with an average diameter of 5 nm, are attached on the surface of BiOBr as 20-50 nm clusters with an intimate contact interface. Such DBH nanostructures show high hydrogen evolution, and 193 mmol g(-1) of H2 is produced with DBH containing 1 wt% Pt, which is 6...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924980/coordination-of-bis-azol-1-yl-methane-based-bisphosphines-towards-ru-ii-rh-i-pd-ii-and-pt-ii-synthesis-structural-and-catalytic-studies
#13
Sajad A Bhat, Madhusudan K Pandey, Joel T Mague, Maravanji S Balakrishna
The coordination chemistry of bisphosphine ligands assembled on the five-membered heterocyclic platform of bis(azol-1-yl)methane viz.: bis(2-diphenylphosphinoimidazol-1-yl)methane (1), bis(5-diphenylphosphinopyrazol-1-yl)methane (2) and bis(5-diphenylphosphino-1,2,4-triazol-1-yl)methane (3) with Ru(II), Rh(I), Pd(II) and Pt(II) is described. The bisphosphines 1-3 react with elemental selenium to give the corresponding bis-selenoyl derivatives 4-6. The reactions of 1-3 with transition metal derivatives produce complexes with different coordination modes...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924979/the-mechanism-of-selective-catalytic-reduction-of-nox-on-cu-ssz-13-a-computational-study
#14
Douglas W Crandell, Haiyang Zhu, Xiaofan Yang, John Hochmuth, Mu-Hyun Baik
The copper-exchanged aluminosilicate zeolite SSZ-13 is a leading catalyst for the selective catalytic reduction of NO. Density functional theory calculations are used to construct a complete catalytic cycle of this process paying special attention to the coordination geometries and redox states of copper. N2 can be produced in the reduction half-cycle via a nitrosamine intermediate generated from the reaction of the additive reductant NH3 with a NO(+) intermediate stabilized by the zeolite lattice. The decomposition of this nitrosamine species can be assisted by incipient Brønsted acid sites generated during catalysis...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924977/a-unique-dysprosium-selenoarsenate-iii-exhibiting-a-photocurrent-response-and-slow-magnetic-relaxation-behavior
#15
Jian Zhou, Hua-Hong Zou, Rongqing Zhao, Hong Xiao, Qingran Ding
A redox, substitution and self-assembly reaction offers a novel dysprosium selenoarsenate(iii) with As(3+) [Dy2(tepa)2(μ2-OH)2Cl2]3[As3Se6]2 (1, tepa = tetraethylenepentamine), which provides the first example of chair conformation ring [As3Se6](3-) combined with lanthanide complexes as counterions. 1 exhibits a photocurrent response and slow magnetic relaxation behavior.
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924976/simple-and-high-yield-access-to-octafunctional-azido-amine-and-urea-group-bearing-cubic-spherosilicates
#16
Sandra Schäfer, Guido Kickelbick
Spherosilicates and polyhedral oligomeric silsesquioxanes represent unique well-defined rigid building blocks for molecular and hybrid materials. Drawbacks in their synthesis are often low yields and the restricted presence of functional groups either based on incomplete transformation of all corners or the reactivity of the functional groups. Particularly amine-functionalization reveals some synthetic challenges. In this study we report the synthesis of a new class of octafunctionalized hydrogen bond forming spherosilicates via a facile route based on octabromo alkyl functionalized cubic spherosilicates...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924975/a-25-mg-89-y-and-115-in-solid-state-mas-nmr-study-of-yt2x-and-y-t0-5t-0-5-2x-t-t-pd-ag-au-x-mg-in-heusler-phases
#17
Christopher Benndorf, Sebastian Stein, Lukas Heletta, Marcel Kersting, Hellmut Eckert, Rainer Pöttgen
Yttrium-transition metal-magnesium (indium) Heusler phases YPd2Mg, YPd2In, YAg2Mg, YAg2In, YAu2Mg, and YAu2In and their quaternary compounds (solid solutions) Y(Pd0.5Ag0.5)2Mg, Y(Pd0.5Ag0.5)2In, Y(Pd0.5Au0.5)2Mg, Y(Pd0.5Au0.5)2In, Y(Ag0.5Au0.5)2Mg and Y(Ag0.5Au0.5)2In were synthesized from the elements in sealed niobium ampoules in a high-frequency furnace or by arc-melting, respectively. All compounds crystallize with the cubic MnCu2Al type structure (Heusler phase), space group Fm3[combining macron]m. The structure of Y(Ag0...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924971/highly-effective-synthesis-of-a-cobalt-ii-metal-organic-coordination-polymer-by-using-continuous-flow-chemistry
#18
Chunhua Gong, Junyong Zhang, Xianghua Zeng, Jingli Xie
The coordination polymer [Co2L4(H2O)2]·CH3CN·H2O (HL = (E)-2-[2-(4-chlorophenyl)vinyl]-8-hydroxyquinoline) has been achieved with 95% yield by using an Asia flow synthesis system (chip reactor). Compared with the conventional batch-type methods such as diffusion, reflux and solvothermal reactions, higher yielding reactions carried out in a flow reactor have demonstrated that this technique is a powerful strategy to obtain coordination compounds.
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924325/lirb2lab2o6-a-new-rare-earth-borate-with-a-mof-5-like-topological-structure-and-a-short-uv-cut-off-edge
#19
Dongdong Xu, Fangfang Zhang, Yanzhou Sun, Zhihua Yang, Binghua Lei, Lili Liu, Shilie Pan
A new rare-earth borate LiRb2LaB2O6 (LB-1) has been synthesized using a high-temperature solution method. Interestingly, it shares its topological structure with the famous porous material MOF-5, which is formed from Zn4O(BDC)3 (BDC = 1,4-benzenedicarboxylate). The nodes [OZn4] and organic linkers [BDC] of MOF-5 are carefully substituted with La(3+) rare-earth cations and the inorganic linkers [BO3] and [LiO4], respectively, in order to construct a pure inorganic open framework. LB-1 exhibits good thermal and water stability...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27924321/a-unified-ligand-electronic-parameter-based-on-13-c-nmr-spectroscopy-of-n-heterocyclic-carbene-complexes
#20
Qiaoqiao Teng, Han Vinh Huynh
The properties and reactivities of transition metal complexes are rooted in the stereoelectronic properties of their ligands. While the bulk of a ligand can be easily evaluated and compared by the drawing of its Lewis structure, prediction on the electronic contributions is often less straightforward. Thus, several electronic parameters have been developed for the experimental evaluation of ligands throughout the years. This article accounts for the most recent one developed by the Huynh group, which employs (13)C NMR spectroscopy to determine ligand donor strengths using N-heterocyclic carbene complexes...
December 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
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