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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/28102423/synthesis-and-solution-stability-of-water-soluble-%C3%AE%C2%BA-2-n-%C3%AE%C2%BAo-bis-3-5-dimethylpyrazolyl-ethanol-manganese-i-tricarbonyl-bromide-corm-onn1
#1
Ralf Mede, Juliane Traber, Moritz Klein, Helmar Görls, Guido Gessner, Patrick Hoffmann, Michael Schmitt, Jürgen Popp, Stefan H Heinemann, Ute Neugebauer, Matthias Westerhausen
The reaction of (OC)5MnBr with bis(3,5-dimethyl-1-pyrazolyl)methane yields [{(Pz(Me2))2CH2}Mn(CO)3Br] (1). The use of tridentate heteroscorpionates such as bis(3,5-dimethyl-1-pyrazolyl)acetic acid and 2,2-bis(3,5-dimethyl-1-pyrazolyl)ethanol leads to the formation of mononuclear [(OC)3Mn{(Pz(Me2))2CH-CO2}] (2) and [(OC)3Mn{(Pz(Me2))2CH-CH2OH}]Br (3, CORM-ONN1). Salt-like photoCORM 3 is soluble in aqueous media up to a concentration of 200 μM, non-toxic up to an approx. 65 μM solution and releases all carbonyl ligands upon irradiation...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102401/the-effect-of-substituents-on-the-stability-of-triply-bonded-gallium-triple-bond-length-as-m-dash-antimony-molecules-a-new-target-for-synthesis
#2
Jia-Syun Lu, Ming-Chung Yang, Ming-Der Su
The effect of substitution on the potential energy surfaces of RGa(-)[triple bond, length as m-dash]Sb(+)R (R = F, OH, H, CH3, SiH3, SiMe(SitBu3)2, SiiPrDis2 and NHC) is studied using density functional theory (M06-2X/Def2-TZVP, B3PW91/Def2-TZVP and B3LYP/LANL2DZ + dp). The computational results show that all of the triply bonded RGa(-)[triple bond, length as m-dash]Sb(+)R molecules have a preference for a bent geometry (i.e., ∠RGaSb ≈ 180° and ∠GaSbR ≈ 90°), which can be described using a valence bond model...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102400/using-chiral-ionic-liquid-additives-to-enhance-asymmetric-induction-in-a-diels-alder-reaction
#3
P Goodrich, H Q Nimal Gunaratne, L Hall, Y Wang, L Jin, M J Muldoon, A P C Ribeiro, A J L Pombeiro, V I Pârvulescu, P Davey, C Hardacre
A bis-oxazoline ligand has been complexed using Cu(ii) and Zn(ii) trifluoromethanesulfonate and a range of chiral ionic liquid (CIL) additives based on natural products were used as a co-catalyst for a Diels-Alder reaction. The catalytic performance of these systems was compared for the asymmetric Diels-Alder reaction between N-acryloyloxazolidinone and cyclopentadiene with and without the presence of a CIL additive. In the absence of the CIL, both catalysts resulted in low enantioselectivities in conventional solvents and ionic liquids...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102398/low-temperature-heat-capacity-standard-entropy-standard-enthalpy-and-magnetic-property-a-new-1d-cu-ii-coordination-polymer-incorporating-tetrazole-1-acetic-acid-and-p-nitrobenzoic-acid
#4
Qi Yang, Jing Ge, Xin Liu, Quan Shi, Hongshan Ke, Qing Wei, Gang Xie, Sanping Chen, Shengli Gao
A new 1D Cu(II) coordination polymer, formulated as {[Cu(TZA)(PNA)]·H2O}n (1) (HTZA = tetrazole-1-acetic acid, HPNA = p-nitrobenzoic acid), was synthesized and structurally characterized. Thermogravimetric analysis demonstrated that the main frame of 1 exhibited good thermostability up to 473 K. The non-isothermal kinetics for the first exothermic process of 1 were studied by Kissinger and Ozawa methods. The magnetic study revealed that 1 possessed antiferromagnetic exchange interactions between Cu(II) ions through the carboxyl-bridge...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102397/highly-exposed-fe-n4-active-sites-in-porous-poly-iron-phthalocyanine-based-oxygen-reduction-electrocatalyst-with-ultrahigh-performance-for-air-cathode
#5
Ganesan Anandhababu, Syed Comail Abbas, Jiangquan Lv, Kui Ding, Qin Liu, Dickson D Babu, Yiyin Huang, Jiafang Xie, Maoxiang Wu, Yaobing Wang
Progress in the development of efficient electrocatalysts for oxygen reduction reactions is imperative for various energy systems such as metal-air batteries and fuel cells. In this paper, an innovative porous two-dimensional (2D) poly-iron-phthalocyanine (PFe-Pc) based oxygen reduction electrocatalyst created with a simple solid-state chemical reaction without pyrolysis is reported. In this strategy, silicon dioxide nanoparticles play a pivotal role in preserving the Fe-N4 structure during the polymerization process and thereby assist in the development of a porous structure...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102394/markedly-enhanced-visible-light-photocatalytic-h2-generation-over-g-c3n4-nanosheets-decorated-by-robust-nickel-phosphide-ni12p5-cocatalysts
#6
Jiuqing Wen, Jun Xie, Rongchen Shen, Xin Li, XingYi Luo, Hongdan Zhang, Aiping Zhang, Guican Bi
In the present work, nickel phosphide (Ni12P5) modified graphitic carbon nitride (g-C3N4) nanosheets were synthesized by a simple grinding method. The structural characterization clearly proved that Ni12P5 nanoparticles were well loaded on the surface of g-C3N4 nanosheets. The photocatalytic activity of the composites was tested by catalyzing the reduction of water to hydrogen under visible light irradiation. The results demonstrate that Ni12P5 is an efficient co-catalyst for photocatalytic H2 production of g-C3N4 nanosheets...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102393/chemically-reversible-binding-of-h2s-to-a-zinc-porphyrin-complex-towards-implementation-of-a-reversible-sensor-via-a-coordinative-based-approach
#7
Maria Strianese, Marina Lamberti, Claudio Pellecchia
Binding of hydrogen sulfide (H2S) to a zinc porphyrin complex and the stabilization of the related zinc hydrosulfido adduct are explored. High-resolution MALDI Fourier transform ion cyclotron resonance mass spectrometry (HR MALDI-FT-ICR) and (1)H NMR experiments provide evidence that HS(-) coordination occurs at the zinc centre. The coordination of HS(-) occurs in a reversible manner and modulates fluorescence emission of a tetra(N-methylpyridyl)porphine zinc complex (TMPyPZn). The results highlight the potential of TMPyPZn and related systems for the implementation of fast and simple H2S sensors via a coordinative-based approach...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102391/enhancement-in-catalytic-proton-reduction-by-an-internal-base-in-a-diiron-pentacarbonyl-complex-its-synthesis-characterisation-inter-conversion-and-electrochemical-investigation
#8
Zhimei Li, Zhiyin Xiao, Fenfen Xu, Xianghua Zeng, Xiaoming Liu
The reaction of a tripodal ligand (H2L) with a {S2N} donor-set with tri-iron dodecacarbonyl in toluene leads to the isolation of a diiron pentacarbonyl complex 1 as a model for the sub-site of the [FeFe]-hydrogenase. Protonation of this complex under CO (1 atm.) forms quantitatively the hexacarbonyl complex 2H+ with a pendant pyridinium group. Infrared spectroscopic investigations indicate that its pendant pyridinium group dissociates to give hexacarbonyl complex 2 which forms subsequently the pentacarbonyl complex 1...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102388/crystal-structure-of-ba2-la0-727ba0-182m0-091-mo6-m-nb-sb-bi-symmetry-nuance-identified-in-photoluminescence-and-ir-spectroscopy-studies
#9
Rohan Phatak, Santosh K Gupta, Priya Maheshwari, Amitabh Das, Sanjay K Sali
A one-third lanthanum deficiency was created in Ba2LaM(5+)O6 compounds (LaM compounds) to form Ba2La2/3M(5+)O5.5 compounds (La2/3M compounds) for M = Nb, Sb, and Bi. The compounds were prepared by a gel-combustion method using citric acid as a fuel. All the compounds were characterized by powder X-ray diffraction (XRD). The XRD analysis showed that the space group of the La2/3M compounds remains the same for the Bi and Sb samples when compared to the reported LaM compounds, except for the Nb sample. La2/3Nb and La2/3Sb adopt a rhombohedral structure with the space group R3[combining macron], whereas La2/3Bi adopts a monoclinic structure with the space group I2/m...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102387/anion-dependent-self-assembly-of-sandwich-13-metal-ni-ln-nanoclusters-with-a-long-chain-schiff-base-ligand
#10
Shiqing Wang, Xiaoping Yang, Jinjie Qian, Qipeng Li, Zhongning Chen, Lijie Zhang, Shaoming Huang, Chengri Wang, Richard A Jones
Two classes of Ni-Ln clusters [Ln4Ni3L3(OAc)6(NO3)3(OH)3] (Ln = Gd (1) and Tb (2)) and [Ln6Ni7L6(OAc)12(OH)6](OH)2 (Ln = Gd (3) and Dy (4)) were prepared using a specifically designed Schiff base ligand built around a flexible (CH2)2O(CH2)2O(CH2)2 chain. 1 and 2 exhibit cone-like structures, while 3 and 4 have nanosized sandwich architectures. The structures were studied by single-crystal X-ray diffraction and TEM, and magnetic properties were investigated.
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102379/the-pyrrole-ring-%C3%AE-2-hapticity-bridged-binuclear-tricarbonyl-mo-0-and-w-0-complexes-catalysis-of-regioselective-hydroamination-reactions-and-dft-calculations
#11
Vikesh Kumar Jha, Ganesan Mani, Yogeswara Rao Davuluri, Anakuthil Anoop
Following the report of the ferrocene structure, metal complexes containing the heteroatom-substituted cyclopentadienyl (Cp) analogue, that is the η(5) pyrrolyl ligand, have been reported. While the Cp ligand continues to be a favorite ligand in organometallics, the transition metal chemistry of the pyrrolyl ligand is still in the developing stage. In view of this, we carried out the reaction between the multidentate ligand 2,3,4,5-tetrakis(3,5-dimethylpyrazolylmethyl)pyrrole (LH) and Mo(CO)6 or [W(CO)3(CH3CN)3] and isolated two new binuclear tricarbonyl Mo(0) and W(0) complexes, [Mo2(CO)6(μ-η(2):η(2)-LH-κ(4)N)] (1) and [W2(CO)6(μ-η(2):η(2)-LH-κ(4)N)] (2)...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102378/a-high-performance-supercapacitor-electrode-based-on-tremella-like-nic2o4-nio-core-shell-hierarchical-nanostructures-on-nickel-foam
#12
Dong He, Guolong Liu, Anqi Pang, Yang Jiang, Hui Suo, Chun Zhao
Tremella-like nickel oxalate@nickel oxide (NiC2O4@NiO) core/shell hierarchical nanostructures have been successfully synthesized on nickel foam, using Ni foam as a current collector, a Ni source and a three-dimensional (3D) substrate, through a facile hydrothermal method followed by an electrochemical activation process. The prepared samples can be directly used as binder-free electrodes for supercapacitors. The tremella-like morphology, together with the NiC2O4 nanoblocks on 3D Ni foam, significantly increases the amount of active sites for redox reactions and the conductivity of the electrode material, shortens the diffusion pathway for ions, facilitates the effective penetration of the electrolyte, and lowers the intrinsic equivalent series resistance, demonstrating good potential for energy storage application...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098318/correction-on-the-mechanism-of-ni-ii-promoted-michael-type-hydroamination-of-acrylonitrile-and-its-substituted-derivatives
#13
S Lapointe, D Zargarian
Correction for 'On the mechanism of Ni(ii)-promoted Michael-type hydroamination of acrylonitrile and its substituted derivatives' by S. Lapointe et al., Dalton Trans., 2016, 45, 15800-15810.
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098309/multi-shelled-ceria-hollow-spheres-with-a-tunable-shell-number-and-thickness-and-their-superior-catalytic-activity
#14
Yuanyuan Liao, Yuan Li, Lei Wang, Yongxia Zhao, Danyang Ma, Biqing Wang, Yongxia Wan, Shengliang Zhong
In this work, ceria multi-shelled nanospheres with a tunable shell number and thickness were prepared by a facile coordination polymer (CP) precursor method without the use of any template and surfactant. Interestingly, the number, thickness and structure of the shell can be tuned by varying the reaction time, reaction temperature, ratio of reagent and calcination temperature. The formation process of the multi-shelled hollow spheres was also investigated, which experienced a core contraction and shell separation process...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098294/co2-as-a-hydrogen-vector-transition-metal-diamine-catalysts-for-selective-hcooh-dehydrogenation
#15
Cornel Fink, Gábor Laurenczy
The homogeneous catalytic dehydrogenation of formic acid in aqueous solution provides an efficient in situ method for hydrogen production, under mild conditions, and at an adjustable rate. We synthesized a series of catalysts with the chemical formula [(Cp*)M(N-N')Cl] (M = Ir, Rh; Cp* = pentamethylcyclopentadienyl; N-N = bidentate chelating nitrogen donor ligands), which have been proven to be active in selective formic acid decomposition in aqueous media. The scope of the study was to examine the relationship between stability and activity of catalysts for formic acid dehydrogenation versus electronic and steric properties of selected ligands, following a bottom-up approach by increasing the complexity of the N,N'-ligands progressively...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098290/in-situ-ligand-exchange-mediated-0d-1d-transformation-of-a-polyoxovanadate
#16
M Wendt, P Polzin, J van Leusen, C Näther, P Kögerler, W Bensch
The antimonato-polyoxovanadate {Ni(II)(en)3}3[VSbO42(H2O)]·ca.15H2O was utilized as a synthon for the solvothermal in situ generation of the new compound {Ni(II)(phen)3}2[{Ni(II)(en)2}VSbO42(H2O)]·19H2O, a rearrangement induced by ligand metathesis. While in the precursor structure cations and anions are isolated, the solid-state structure of the product is characterized by 1D chains consisting of alternating [V15Sb6O42(H2O)](6-) cluster shells and [Ni(en)2](2+) units covalently linked to neighboring clusters via terminal oxygen atoms...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098289/photoactive-meso-tetra-4-pyridyl-porphyrin-tetrakis-chloro-2-2-bipyridine-platinum-ii-derivatives-recognize-and-cleave-dna-upon-irradiation
#17
Vanessa A Oliveira, Bernardo A Iglesias, Bruna L Auras, Ademir Neves, Hernán Terenzi
In this work, we evaluate the interaction of the peripheral Pt(bpy)Cl(+) substituted porphyrins, H2PtPor and ZnPtPor with DNA using UV-vis, emission fluorescence, CD spectroscopy, and DNA melting properties altered by the Pt(ii)-porphyrinoid compounds. Additionally, we observe the ability of these porphyrin derivatives to generate (1)O2 and to efficiently photocleave plasmid DNA upon visible light irradiation based on a mixed (oxidative/hydrolytic) mechanism.
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098286/tridentate-lewis-acids-based-on-triphenylsilane
#18
Janek Tomaschautzky, Beate Neumann, Hans-Georg Stammler, Andreas Mix, Norbert W Mitzel
Several derivatives of the propeller-shaped ortho-substituted triphenylsilanes, carrying metal- or silicon-based acceptor groups, are reported. They were synthesized starting from tris(2-bromophenyl)fluorosilane, tris(2-vinylphenyl)fluorosilane and tris(2-ethynylphenyl)fluorosilane to generate a scope of Lewis-acidic molecules with different cavities. An improved synthetic protocol for donor-free tris(2-lithiophenyl)silanes is described. First attempts in host-guest chemistry to probe the binding between a threefold alane-functionalised ortho-substituted triphenylsilane and a tridentate Lewis-basic guest molecule are presented...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098285/kb-po4-f-a-novel-acentric-deep-ultraviolet-material
#19
Ji-Hong Jiang, Lin-Chuan Zhang, Ya-Xi Huang, Zhi-Mei Sun, Yuanming Pan, Jin-Xiao Mi
Two challenges to grow KBe2BO3F2 (KBBF), the best known deep-ultraviolet nonlinear optical (NLO) material to date, are the limited crystal sizes and the use of a highly toxic element (Be). Herein we report on the discovery of a novel anhydrous non-centrosymmetric alkali fluorinated borophosphate KB(PO4)F (KBPF) featuring a cut-off wavelength of less than 200 nm and a large second-harmonic generation (SHG) effect similar to KH2PO4 (KDP), hence representing a new promising deep-ultraviolet NLO material. The KBPF crystals consisting of common elements can be grown using green and cost effective processes and do not show any detectable hygroscopicity...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098284/oxygen-vacancy-ordering-in-srfe0-25co0-75o2-63-perovskite-material
#20
Javier Fernández Sanjulián, Madhu Chennabasappa, Susana García-Martín, Gwilherm Nénert, Alain Wattiaux, Etienne Gaudin, Olivier Toulemonde
SrFe0.25Co0.75O2.63 was synthesized by a solid-state reaction. Its structural study at room temperature using conventional X-ray as well as neutron powder diffraction, electron diffraction and high-resolution transmission electron microscopy is presented. An oxygen-vacancy ordering related to the "314" model known for the Sr3Y1Co4O10.5 oxide is proposed despite neither an A-site ordering nor an A-site mismatch. By means of Mössbauer spectroscopy, Mohr salt titration and the difference in the neutron cross sections of Fe and Co, a cation distribution within the crystallographic sites as the following Sr4(Fe0...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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