7439-89-6Relevant articles and documents
An investigation of the Dy-Fe-Cr phase diagram: Phase equilibria at 773 K
Yao, Qingrong,Wang, Hailong,Liu, Zhanwei,Zhou, Huaiying,Pan, Shunkan
, p. 286 - 288 (2009)
Phase equilibria in the Dy-Fe-Cr system were investigated by X-ray powder diffraction (XRD), differential thermal analysis (DTA), scanning electron microscopy (SEM) techniques and the isothermal section at 773 K was obtained. It consists of 8 single-phase
Nesmeyanov et al.
, p. 163 (1969)
SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF THE MIXED-METAL CARBIDO CLUSTER Fe5C(μ2-CO)3(CO)11(μ2-AuPEt3)-(μ4-AuPEt3) AND THE OXIDATION OF Fe-Au CLUSTERS
Johnson, Brian F.G.,Kaner, David A.,Lewis, Jack,Rosales, Maria J.
, p. C73 - C78 (1982)
Reaction of 2- with excess (PEt3)AuCl/Tl(PF6) affords the mixed-metal cluster Fe5C(μ2-CO)3(CO)11(μ2-AuPEt3)(μ4-AuPEt3) which has been shown by an X-ray structural analysis to exhibit a novel coordination for one of the AuPEt3 groups.This and another Fe-Au cluster, Fe4H(CO)12C(AuPEt3) undergo unusual oxidative rearrangements.
Morphology, diameter distribution and Raman scattering measurements of double-walled carbon nanotubes synthesized by catalytic decomposition of methane
Ren, Wencai,Li, Feng,Chen, Jian,Bai, Shuo,Cheng, Hui-Ming
, p. 196 - 202 (2002)
Double-walled carbon nanotubes (DWNTs) were synthesized by catalytic decomposition of methane in the presence of Fe catalyst at 1373 K. The microstructure of the as-prepared DWNTs was characterized by high-resolution transmission electron microscopy (HRTEM) and resonant laser Raman spectroscopy. HRTEM observations revealed that the dominant type of the as-prepared product was DWNTs, which are mostly bundle-like. A triangular lattice arrangement of DWNTs in a DWNT bundle was observed. The as-prepared DWNTs show corresponding peaks from resonant Raman spectra of the radial breathing mode (RBM), which are considered to be associated with inner tubes as well as outer tubes of the DWNTs. The outer and inner tube diameters of the DWNTs, as determined from HRTEM images, are in the range of 1.6-3.6 and 0.8-2.8 nm, in agreement with the results from the resonant Raman scattering measurements. Moreover, the interlayer spacing of DWNTs is not a constant, ranging from 0.34 to 0.41 nm.
Field emission properties of vertically aligned iron nanocluster wires grown on a glass substrate
Kim, Do-Hyung,Jang, Hoon-Sik,Lee, Hyeong-Rag,Kim, Chang-Duk,Kang, Hee-Dong
, p. 109 - 111 (2004)
The synthesis of vertically aligned nanocluster wires (NCW) on indium-tin-oxide-coated glass substrates by the thermal decomposition of Fe(CO)5 with a resistive heater under a magnetic field was discussed. It was shown that the aligned NCW was controlled by varying the flow rate of carrier gas. It was found that the low-density NCWs showed better field emission characteristics, with a low turn-on field of about 4 V/μm and a current density as high as 3 mA/cm2 at 7.6 V/μm. The field enhancement factor (γ) was determined to be ～1200 for high-density NCWs and ～1600 for low-density NCW.
Atomic Iron Recoil in Multiphoton Dissociation of Ferrocene
Liou, H. T.,Ono, Y.,Engelking, P. C.,Moseley, J. T.
, p. 2892 - 2896 (1986)
The translational energy of atomic iron, produced by a three-photon dissociation of bis(cyclopentadienyl)iron (ferrocene), has been measured by using the atomic multiphoton ionization Doppler line width at 440 nm.The iron atoms have an appreciable amount of recoil, indicating that the ferrocene dissociation process is nonconcerted and does not preserve a center of symmetry.This is also evidence for a dissociation via one or more repulsive electronic states, rather than by statistical, unimolecular decay of a hot ground state.
Williams, H. E.
, p. 1014 - 1014 (1912)
Aqueous electrodeposition of iron group-vanadium binary alloys
Yoo,Schwartz,Nobe
, p. 4335 - 4343 (2005)
Electrodeposition of binary iron group (IG)-vanadium (V) alloys from aqueous citrate solutions was investigated. Addition of NH3(aq.) and increasing solution pH resulted in increased deposit V content, but non-metallic deposits were obtained at solution pH > 7. Increasing current density resulted in an almost linear decrease in V content and a sharp increase in hydrogen evolution (decreased current efficiency). In general, the amount of V deposited with the IG metal increased as follows: Ni Fe ≤ Co. XRD spectra indicated that preferred orientations from 25 °C solutions were not displaced by elevated temperature deposits. Changes in orientation may contribute to the deposit magnetic properties; e.g., Co-V deposits with (1 0 0) planes exhibit harder magnetization than deposits with (0 0 2) planes.
Nitrogen storage properties based on nitrogenation and hydrogenation of rare earth-iron intermetallic compounds R2Fe17 (R=Y, Ce, Sm)
Itoh, Masahiro,Machida, Ken-Ichi,Nakajima, Hiroharu,Hirose, Kazuhiro,Adachi, Gin-Ya
, p. 141 - 146 (1999)
The nitrogen storage properties for the rare earth-iron intermetallic compounds, R2Fe17 (R=Y, Ce, and Sm), were investigated. These intermetallic compounds formed the corresponding metal nitrides by heating in a mixed gas of NH3-H2 at 350-450°C and the nitrogen was incorporated into interstitial sites of the crystal lattices. The nitrogen stored as the metal nitrides was reversibly released as NH3 by the following heating in H2 at 450°C. An amount of the nitrogen released per unit volume of these intermetallic compounds is larger than that of a conventional nitrogen container charged at 15 MPa. The nitrogen storage capacity of Sm2Fe17Nx was increased by repeating the nitrogenation-hydrogenation cycle owing to the formation of FeNx/RNy composites with large surface areas derived from the starting intermetallic compound through the cycle. Furthermore, the nitrogen storage characteristics of Sm2Fe17 powders were effectively improved by surface loading with Ru metal that is active for ammonia generation.
Electrodeposited Ni-Fe-C cathodes for hydrogen evolution
Meguro, Shinsaku,Sasaki, Teruhito,Katagiri, Hiroshi,Habazaki, Hiroki,Kawashima, Asahi,Sakaki, Takashi,Asami, Katsuhiko,Hashimoto, Koji
, p. 3003 - 3009 (2000)
Tailoring of active nickel alloy cathodes for hydrogen evolution in a hot concentrated hydroxide solution was attempted by electrodeposition. Electrodeposited iron is naturally more active for hydrogen evolution than nickel, but Ni-Fe alloys show further high activity for hydrogen evolution, although the rate-determining step being assumed as proton discharge is not changed. The carbon addition to iron or nickel remarkably enhances the activity for hydrogen evolution and changes the mechanism of hydrogen evolution. Ternary Ni-Fe-C alloys show the highest activity for hydrogen evolution, and the Tafel slope of hydrogen evolution is about 33 mV/dec, suggesting the rate-determining step of desorption of adsorbed hydrogen by recombination. XPS analysis reveals that the charge transfer occurs from nickel to iron in alloys and the carbon addition particularly enhances the charge transfer. Accelerated proton discharge due to enhanced charge transfer from nickel to iron seems responsible for the high activity of the Ni-Fe-C alloys for hydrogen evolution.
Dispersing and coating of transition metals Co, Fe and Ni on carbon materials
Zhong, Ziyi,Liu, Binghai,Sun, Lianfeng,Ding, Jun,Lin, Jianyi,Tan, Kuang Lee
, p. 135 - 143 (2002)
Interaction between transition metals Co, Fe and Ni and carbon materials, such as multi-walled carbon nanotubes (MWNTs), single-walled carbon nanotubes (SWNTs), activated carbon (AC) and layered graphite (LG), has been investigated at high temperatures. Complete wetting for AC, partial wetting for MWNTs, and almost no wetting for SWNTs and LG have been observed, respectively. It is found that the defects in the carbon materials play a key role in the interaction.
Electrodeposition of metal iron from dissolved species in alkaline media
Allanore,Lavelaine,Valentin,Birat,Lapicque
, p. E187-E193 (2007)
The electrodeposition of metal iron from iron dissolved species in alkaline media has been investigated. Dissolved ferric species in equilibrium with hematite (α -Fe2 O3) have been electrochemically identified and their reduction to iron was demonstrated. The reduction efficiency was poor, however, because of the low concentration of dissolved matter (2.6× 10-3 M). In order to determine more precisely the electrochemical features of the deposition reaction from iron ions, more concentrated solutions at 1.9× 10-2 M have been obtained using an iron anode as the ion source. Voltammetric and chronoamperometric investigations using a rotating disk electrode revealed that such concentrated solutions contain ferric and ferrous species, with higher concentration of the trivalent form. Metal can be deposited with higher current efficiency in these concentrated solutions with less than 30% of the current spent in hydrogen evolution.
Webb, A. N.,Eischens, R. P.
, p. 4710 - 4713 (1955)
Johns et al.
, p. 277 (1962)
Structure and magnetic properties of electrodeposited Fe-Ni alloy films
Ueda, Yuji,Takahashi, Minoru
, p. 477 - 483 (1980)
Fe-Ni alloy films with a composition of Invar region were prepared on copper substrates by electrodeposition. The crystal structures and magnetic properties of the films were investigated. The region which formed α phase in the films was different from that shown in the equilibrium phase diagram for bulk samples of Fe-Ni system, that is, the region shifts toward the nickel richer composition. The drop region the magnetization in the electrodeposited film shows a tendency to shift to the nickel richer composition (45 at.%Ni-Fe) corresponding with the shift of the α phase at the film deposition. The magnetic moment at low temperatures in the electrodeposited film decreases more rapidly with the increase of temperature as compared with the result observed in the bulk crystal.
Belcher, R.,West, T. S.
, p. 260 - 267 (1951)
Phillips, M. J.,Emmett, P. H.
, p. 268 - 272 (1986)
Electrodeposition of monodispersed Fe nanocrystals from an ionic liquid
Aravinda,Freyland
, p. 2754 - 2755 (2004)
Monodispersed Fe nanocrystals up to ～2 nm thick, ～50 nm wide and ～120 nm long have been electrodeposited from the ionic melt AlCl 3-1-methyl-3-butylimidazolium chloride {AlCl3-[MBIm] +Cl-} at room temperature on
Belbruno, Joseph J.
, p. 267 - 273 (1989)
Photocatalytic hydrogen evolution under highly basic conditions by using Ru nanoparticles and 2-phenyl-4-(1-naphthyl)quinolinium ion
Yamada, Yusuke,Miyahigashi, Takamitsu,Kotani, Hiroaki,Ohkubo, Kei,Fukuzumi, Shunichi
, p. 16136 - 16145 (2011)
Photocatalytic hydrogen evolution with a ruthenium metal catalyst under basic conditions (pH 10) has been made possible for the first time by using 2-phenyl-4-(1-naphthyl)quinolinium ion (QuPh+-NA), dihydronicotinamide adenine dinucleotide (NADH), and Ru nanoparticles (RuNPs) as the photocatalyst, electron donor, and hydrogen-evolution catalyst, respectively. The catalytic reactivity of RuNPs was virtually the same as that of commercially available PtNPs. Nanosecond laser flash photolysis measurements were performed to examine the photodynamics of QuPh+-NA in the presence of NADH. Upon photoexcitation of QuPh+-NA, the electron-transfer state of QuPh+-NA (QuPh?-NA ?+) is produced, followed by formation of the π-dimer radical cation with QuPh+-NA, [(QuPh?-NA?+) (QuPh+-NA)]. Electron transfer from NADH to the π-dimer radical cation leads to the production of 2 equiv of QuPh?-NA via deprotonation of NADH?+ and subsequent electron transfer from NAD? to QuPh+-NA. Electron transfer from the photogenerated QuPh?-NA to RuNPs results in hydrogen evolution even under basic conditions. The rate of electron transfer from QuPh ?-NA to RuNPs is much higher than the rate of hydrogen evolution. The effect of the size of the RuNPs on the catalytic reactivity for hydrogen evolution was also examined by using size-controlled RuNPs. RuNPs with a size of 4.1 nm exhibited the highest hydrogen-evolution rate normalized by the weight of RuNPs.
Baxter, G. P.,Hoover, C. R.
, p. 1657 - 1657 (1912)
Visible multiphoton dissociation of Fe(CO)5 for production of iron atoms
Mitchell, S.A.,Hackett, P.A.
, p. 7813 - 7821 (1990)
Ground state (a 5D) and metastable excited state (a 5F and a 3F) iron atoms have been produced by visible multiphoton dissociation of Fe(CO)5 at 552 nm in a static pressure gas cell at room temperature.The distribution of iron atoms among these states has been measured by using a pump and probe arrangement in which the probe laser pulse excites resonance fluorescence from iron atoms at variable time delay following the photolysis pulse.Collisional relaxation processes of metastable a 5F and a 3F iron atoms have been investigated by using a simple model to describe the main features of the overall relaxation process.Results for a variety of quenching gases including N2O, C2H4O, and O2 indicate that relaxation occurs mainly by transitions between adjacent multiplets, with little intermediate intramultiplet relaxation and no detectable removal by chemical reaction.An interpretation of these results is given in terms of schematic potential energy curves which represent the bonding capabilities of specific-electronic configurations of iron atoms.These curves are discussed in an accompanying paper on studies of chemical reactions of ground state iron atoms.
On the use of amine-borane complexes to synthesize iron nanoparticles
Pelletier, Frédéric,Ciuculescu, Diana,Mattei, Jean-Gabriel,Lecante, Pierre,Casanove, Marie-José,Yaacoub, Nader,Greneche, Jean-Marc,Schmitz-Antoniak, Carolin,Amiens, Catherine
, p. 6021 - 6026 (2013)
The effectiveness of amine-borane as reducing agent for the synthesis of iron nanoparticles has been investigated. Large (2-4 nm) Fe nanoparticles were obtained from [Fe{NACHTUNGTRENUNG(SiMe3)2}2]. Inclusion of boron in the nanoparticles is clearly evidenced by extended X-ray absorption fine structure spectroscopy and M?ssbauer spectrometry. Furthermore, the reactivity of amine-borane and amino-borane complexes in the presence of pure Fe nanoparticles has been investigated. Dihydrogen evolution was observed in both cases, which suggests the potential of Fe nanoparticles to promote the release of dihydrogen from amine-borane and amino-borane moieties. Copyright
Interaction of diamond with ultrafine Fe powders prepared by different procedures
Chepurov,Sonin,Chepurov,Zhimulev,Tolochko,Eliseev
, p. 864 - 868 (2011)
We have studied the interaction of synthetic diamond crystals with ultrafine Fe powders during catalytic diamond gasification in a hydrogen atmosphere at 900°C. The Fe powders were prepared by three procedures: reduction of Fe2O3 nan
Reduction and adsorption of Pb2+ in aqueous solution by nano-zero-valent iron - A SEM, TEM and XPS study
Xi, Yunfei,Mallavarapu, Megharaj,Naidu, Ravendra
, p. 1361 - 1367 (2010)
This study reports the synthesis, characterisation and application of nano-zero-valent iron (nZVI). The nZVI was produced by a reduction method and compared with commercial available ZVI powder for Pb2+ removal from aqueous phase. Comparing with commercial ZVI, the laboratory made nZVI powder has a much higher specific surface area. XRD patterns have revealed zero-valent iron phases in two ZVI materials. Different morphologies have been observed using SEM and TEM techniques. EDX spectrums revealed even distribution of Pb on surface after reaction. The XPS analysis has confirmed that immobilized lead was present in its zero-valent and bivalent forms. 'Core-shell' structure of prepared ZVI was revealed based on combination of XRD and XPS characterisations. In addition, comparing with Fluka ZVI, this lab made nZVI has much higher reactivity towards Pb2+ and within just 15 min 99.9% removal can be reached. This synthesized nano-ZVI material has shown great potential for heavy metal immobilization from wastewater.
Ligational and biological studies of Fe(III), Co(II), Ni(II), Cu(II), and Zr(IV) complexes with carbamazepine as antiepileptic drug
Mohamed, Amira A.,Sadeek, Sadeek A.
, (2021/02/12)
Carbamazepine (CBZ) is considered to be the preferred drug for fractional seizures and may also use in the prevention of primary generalized tonic–clonic seizures. The chelates of CBZ with Fe(III), Co(II), Ni(II), Cu(II), and Zr(IV) were designed and characterized on the basis of elemental analysis, FT-IR, 1H NMR, UV-visible, mass spectra, thermal analysis (TG, DTG, and DTA), molar conductivity, and magnetic moment. IR spectra emphasize that CBZ acts as a neutral bidentate ligand with metal ions through amide oxygen and amino nitrogen. UV-visible spectra and magnetic moment demonstrate that all chelates have geometric octahedral structures. Complexes thermal behavior is systematically analyzed employing TG and DTA technicality. TG findings signalize that water molecules (hydrated and coordinated) are extracted the first and second phases, while CBZ ligand is splitted in the second and subsequent steps. From the DTA curves, the obtained data reflect that the degradation processes are endothermic or exothermic peaks. Assorted thermodynamic factors are calculated, and the results are explicated. Antimicrobial activity was examined against two Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) and two Gram-negative bacteria (Escherichia coli and Pseudomonas aeuroginosa). Anti-fungal efficacy of the compounds has been tested. The Co(II) complex was highly significant against the antifungal Candida albicans and significantly against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis.
ROMP polymer supported manganese porphyrins: Influence of C[dbnd]C bonds along polymer chains on catalytic behavior in oxidation of low concentration Fe2+
Li, Fanfan,Wang, Xuan,Zhang, Yanwu,Zhao, Huanhuan
, (2020/02/22)
One unsaturated polymer support was prepared through ring opening metathesis polymerization (ROMP) of norbornene-2,3-dip-toluene sulfonate initiated by Grubbs 2nd initiator and manganese porphyrins were immobilized on polymer through transesterification reaction. To investigate the effect of C[dbnd]C bonds along polymer chains on the catalytic behavior, the obtained polymer supported catalyst (P-PPIXMnCl) was applied in oxidation of low concentration Fe2+ to mimic catalytic behavior of Ceruloplasmin. In the presence of P-PPIXMnCl, the conversion of Fe2+ reaches to 91.92% and 96.46% at 10 °C and 37.5 °C (body temperature), respectively. Compared to manganese porphyrins, P-PPIXMnCl can dramatically increase oxidation rate of Fe2+ and the catalytic kinetic shows that the oxidation reaction changes from second-order to third-order. Upon hydrogenation of ROMP polymer, the oxidation reaction still conforms to the second-order kinetics. Density functional theory (DFT) calculation shows that the C[dbnd]C bonds along polymer chains play an important role in the coordination with Fe2+ in the catalytic microenvironment. The real time morphology of supported catalysts in aqueous environment characterized by Cryo-TEM indicates that hydrogenation can shrink the morphology of polymer-water skeleton. The catalyst could be recycled six times without any significant loss in activity. The liner heterogeneous catalyst is expected to be used as drugs for treating excessive iron accumulation in the human body.
COMPOUND
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Paragraph 0080-0085, (2020/10/31)
A purpose of the invention is to provide a novel compound. The novel compound is represented by M[i-C3H7NC(R)N-i-C3H7]2 (where, M=Co or Fe; R=n-C3H7 or i-C3H7) that is a liquid under 25° C. (at 1 atmospheric pressure).
