F:Highly flammable;
7439-96-5Relevant articles and documents
Koch, O. G.
, (1955)
Supramolecular Interactions Induced Chirality Transmission, Second Harmonic Generation Responses, and Photoluminescent Property of a Pair of Enantiomers from in Situ [2 + 3] Cycloaddition Synthesis
Gao, Ji-Xing,Xiong, Jian-Bo,Xu, Qing,Tan, Yu-Hui,Liu, Yi,Wen, He-Rui,Tang, Yun-Zhi
, p. 1559 - 1564 (2016)
Spontaneous resolutions from an in situ reaction especially for a Sharpless reaction are really rare. Here we display a new pair of enantiomeric compounds Δ- and Λ-[Mn(4-tzba)(bpy)2·H2O](bpy)·3H2O (labeled as Δ-1 and Λ-1 respectively) (4-tzba = 4-tetrazolbenzoic acid; bpy = 2,2′-bipyridine) from a Sharpless reaction. They crystallized in the P212121 chiral space group and demonstrated strong second harmonic generation (SHG) responses and red photoluminescence property. The chiral metal conformations were captured by the introduction of the distorted bpy and the in situ synthesized 4-tzba ligands. The hydrogen bonds connecting the 4-tzba and central metal play a crucial role in the chirality transmission, as well as the donor-acceptor type SHG nonlinear response.
Synthesis, spectral characterization, density functional theory studies, and biological screening of some transition metal complexes of a novel hydrazide–hydrazone ligand of isonicotinic acid
El-Nahas, Ahmed M.,Kashar, Tahani I.,Tolan, Dina A.,Yoshizawa, Kazunari
, (2021)
Novel Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) complexes (1–7) of hydrazide–hydrazone ligand (H2L) derived from the condensation of isonicotinic acid hydrazide with (Z)-N′-(2-nitrobenzylidene)-3-oxobutanehydrazide have been prepared. The ligand and its chelates were characterized based on elemental analysis, spectral, thermal analysis, molar conductance, and magnetic moment measurements. Besides, density functional theory (DFT) computations have been conducted to study structures and energetics of the ligand and its complexes. The IR spectra showed that the ligand was chelated with the metal ion in a monobasic tridentate manner using ONO donors in all complexes except Zn(II) complex (5) where the ligand binds with Zn(II) ion as a dibasic tridentate utilizing ONO donors. The magnetic moment and electronic spectral data revealed octahedral and square pyramidal geometries for complexes (1, 7) and (2, 4, 5), respectively, whereas a square planar geometry was suggested for 3. DFT studies show that the Cd(II) center reveals interesting structural deviations from regular octahedral geometry in the resulting hexa-coordinated complex [Cd(H2L)2].2H2O (6) assumes a trigonal prismatic (TP) structure for this complex. The antibacterial and antifungal activities of the ligand and its complexes have been investigated with different bacterial and fungal strains. The data revealed that Hg(II) complex (7) demonstrated a very good antibacterial and antifungal activity than others. Highlights: A new hydrazide–hydrazone ligand of isonicotinic acid was synthesized. Seven mononuclear Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) complexes of the new ligand were prepared and characterized by different tools. DFT studies have been carried out to study the structure of the ligand and its complexes. Antimicrobial activities of the ligand and its complexes were studied against a variety of bacterial and fungal strains by using disk diffusion method and results were compared with standard drugs.
Colclough, T. P.
, p. 202 - 223 (1925)
The synthesis of alkylmanganese(III) complexes. Crystal structure of MnMe(2-Me2NCH2C6H4)2
Latten, Jozef L.,Dickson, Ron S.,Deacon, Glen B.,West, Bruce O.,Tiekink, Edward R.T.
, p. 101 - 108 (1992)
Treatment of bis(3-N,N-dimethylaminopropyl)manganese(II) with methyllithium and subsequently with silver tetrafluoroborate gives bis(3-N,N-dimethylaminopropyl)methylmanganese(III) (1).The related complex bis(2-N,N-dimethylaminomethylphenyl)methylmanganese
Microwave synthesis and inherent stabilization of metal nanoparticles in 1-methyl-3-(3-carboxyethyl)-imidazolium tetrafluoroborate
Marquardt, Dorothea,Xie, Zailai,Taubert, Andreas,Thomann, Ralf,Janiak, Christoph
, p. 8290 - 8293 (2011)
The synthesis of Co-NPs and Mn-NPs by microwave-induced decomposition of the metal carbonyls Co2(CO)8 and Mn2(CO) 10, respectively, yields smaller and better separated particles in the functionalized IL 1-methyl
Thermal analysis of manganese(II) complexes of general formula (Bu4N)2[MnBrnCl4-n]
Styczeń,Wyrzykowski,Gazda,Warnke
, p. 46 - 51 (2009)
Thermal decomposition of compounds consisting of tetrahalogenomanganese(II) anions, [MnBrnCl4-n]2- (n = 0-4), and a tetrabutylammonium cation has been studied using the DSC, TG-FTIR, TG-MS and DTA techniques. The measureme
Electrodeposition and characterization of manganese coatings
Gong, Jie,Zangaria, Giovanni
, p. C209-C217 (2002)
Manganese coatings of high quality are electrodeposited on steel substrates from simple sulfate solutions with addition of ammonium sulfate. Potentiodynamic scans and galvanostatic experiments are used to study manganese electrodeposition in a wide range of pH and current density. The effect of these variables on the microstructure, crystallography, mechanical, and corrosion-resistance properties of manganese deposits are investigated. It is found that ammonium sulfate enhances the reduction reaction of the manganese ion and provides a buffering effect. Two types of manganese deposits can be obtained depending on current density: crystalline films (type I, body-centered tetragonal γ-Mn) at low current density and amorphous films (type II) at high current density. Bright manganese films with (002) preferential orientation are electrodeposited at low pH. Type I structures show recrystallization at room temperature with phase transformation; the rate of phase transformation from γ-Mn to α-Mn (body-centered cubic) follows a Johnson-Mehl-Avrami kinetics. Crystalline films obtained at relatively high current density and low pH tend to have higher phase transformation rates. Amorphous films show good corrosion resistance both in acidic sodium sulfate/borate and sodium chloride electrolytes.
Crystal structure and thermodecomposition kinetics of a three-dimensional supramolecular Mn complex with 8-hydroxyquinoline
Yang,Bi,Fan,Liu,Guo,Ai
, p. 504 - 510 (2006)
A three-dimensional supramolecular complex, [Mn(8-OHQ)3] ? CH3OH (8-OHQ is 8-hydroxyquinoline), C28H 22MnN3O4, was synthesized in methanol, and its crystal structure was determined by X-ray crystallography. The crystals are triclinic, space group P P 1, a = 10.823(2) A, b = 13.222(3) A, c = 17.283(3) A, α = 90.03(3)°, β = 93.15(3)°, γ = 92.58(3)°, V = 2467.0(8) A3, Z = 4, F(000) = 1072, ρ = 1.399 g/cm3, μ = 0.575 mm-1. Hydrogen bonds and intermolecular interactions, which are observed in the complex, stabilize its structure. The thermal decomposition kinetics of the complex was investigated under nonisothermal conditions using the Achar differential method and the Coats-Redfern integral method. Pleiades Publishing, Inc., 2006.
Volatile and thermally stable mid to late transition metal complexes containing α-imino alkoxide ligands, a new strongly reducing coreagent, and thermal atomic layer deposition of Ni, Co, Fe, and Cr metal films
Kalutarage, Lakmal C.,Martin, Philip D.,Heeg, Mary Jane,Winter, Charles H.
, p. 12588 - 12591 (2013)
Treatment of MCl2 (M = Cu, Ni, Co, Fe, Mn, Cr) with 2 equiv of α-imino alkoxide salts K(RR′COCNtBu) (R = Me, tBu; R′ = iPr, tBu) afforded M(RR′COCNtBu)2 or [Mn(RR′COCNtBu) 2]2 in 9-75% yields. These complexes combine volatility and high thermal stability and have useful atomic layer deposition (ALD) precursor properties. Solution reactions between Ni, Co, and Mn complexes showed that BH3(NHMe2) can reduce all to metal powders. ALD growth of Ni, Co, Fe, and Cr films is demonstrated. Mn film growth may be possible, but the films oxidize completely upon exposure to air.
EQCM study of the electrodeposition of manganese in the presence of ammonium thiocyanate in chloride-based acidic solutions
Díaz-Arista,Anta?o-López,Meas,Ortega,Chainet,Ozil,Trejo
, p. 4393 - 4404 (2006)
The influence of ammonium thiocyanate (NH4SCN) on the mechanism of manganese electrodeposition from a chloride-based acidic solution was investigated by cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). The EQCM data were represented as plots dΔm dt-1 versus E, known as massograms. Because massograms are not affected by interference from the hydrogen evolution reaction, they clearly show the manganese reduction and oxidation processes. By comparing the voltammograms with their corresponding massograms, it was possible to differentiate mass changes due to faradaic processes from those due to non-faradaic processes. Morphology, chemical composition and structure of the manganese deposits formed in different potential ranges were analyzed by scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD). The results showed that in the absence of NH4SCN, Mn(OH)2(s) is formed in the potential range -1.1 to -0.9 V due to the hydrogen evolution reaction in this region. At more cathodic potentials, the deposition of β-manganese and the inclusion of Mn(OH)2(s) into the deposit occur; both of these species underwent dissolution by non-faradaic processes during the anodic scan. In the presence of NH4SCN, the formation of α- and γ-manganese was observed. When the potential was ≤-1.8 V and [NH4SCN] exceeded 0.3 M, the α-manganese phase was favored.
Free Radical-Mediated Heterogeneous Photocatalytic Reduction of Metal Ions in UV-Irradiated Titanium Dioxide Suspensions
Somasundaram, Sashikala,Ming, Yong,Chenthamarakshan,Schelly, Zoltan A.,Rajeshwar, Krishnan
, p. 4784 - 4788 (2004)
This paper describes the indirect photocatalytic reduction of four metal ions: Cd2+, Zn2+, Mn2+, and Tl+ using formate radical anions (CO2.-) generated in UV-irradiated aqueous TiO2 suspensions. Trends in the reactivity of these four metal ions are compared with corresponding rate constants reported in the literature for the homogeneous reactions of these metal ions with CO 2.- in aqueous media. In both cases, the reaction rates follow the same order: Cd2+ > Tl+ > Mn2+ > Zn2+. Using Tl+ as a model metal ion, a simple kinetics scheme is developed for the indirect reduction route, and the predictions from this model are shown to be in excellent agreement with experimental data.
Deventer, J. S. J. van
, p. 365 - 378 (1987)
Sodium azide as a reagent for solid state metathesis preparations of refractory metal nitrides
Hector, Andrew L.,Parkin, Ivan P.
, p. 913 - 918 (1995)
Thermal initiation (.apprx.300°C) of a reaction between sodium azide and anhydrous metal chlorides (LaCl3, SmCl3, TiCl3, ZrCl4, HfCl4, VCl3, TaCl5, CrCl2, WCl6 and MnCl2) in sealed evacuated ampoules rapidly produces binary metal nitrides, dinitrogen and sodium chloride. The metalnitrides were purified by trituration with methanol and characterized b y powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and FT-IR.
Synthesis of orthorhombic LiMnO2 as a high capacity cathode for Li-ion battery by emulsion drying method
Myung, Seung-Taek,Komaba, Shinichi,Kumagai, Naoaki
, p. 574 - 575 (2001)
Orthorhombic LiMnO2 was readily synthesized by calcination of an emulsion-dried powder precursor. The optimum synthesis condition to crystallize into zigzag layered β-NaMnO2 system was to calcine at 925 °C for 12 h in an Ar atmosphere. According to TEM observation, the prepared material from the emulsion-dried precursor consisted of highly ordered single crystalline particle. Li/LiMnO2 cell showed the capacity of about 173 mAh (g-oxide)-1 and excellent capacity retention upon cycling with help of cycle-induced spinel like phase, more than 155 mAh g-1 over 300 cycles at 25 °C.
Base-Free and Bisphosphine Ligand Dialkylmanganese(II) Complexes as Precursors for Manganese Metal Deposition
Price, Jeffrey S.,Chadha, Preeti,Emslie, David J. H.
, p. 168 - 180 (2016)
The solid-state structures and the physical, solution magnetic, solid-state magnetic, and spectroscopic (NMR and UV/vis) properties of a range of oxygen- and nitrogen-free dialkylmanganese(II) complexes are reported, and the solution reactivity of these complexes toward H2 and ZnEt2 is described. The compounds investigated are [{Mn(μ-CH2SiMe3)2}8] (1), [{Mn(CH2CMe3)(μ-CH2CMe3)2}2{Mn(μ-CH2CMe3)2Mn}] (2), [Mn(CH2SiMe3)2(dmpe)] (3; dmpe = 1,2-bis(dimethylphosphino)ethane), [{Mn(CH2CMe3)2(μ-dmpe)}2] (4), [{Mn(CH2SiMe3)(μ-CH2SiMe3)}2(μ-dmpe)] (5), [{Mn(CH2CMe3)(μ-CH2CMe3)}2(μ-dmpe)] (6), [{Mn(CH2SiMe3)(μ-CH2SiMe3)}2(μ-dmpm)] (7; dmpm = bis(dimethylphosphino)methane), and [{Mn(CH2CMe3)(μ-CH2CMe3)}2(μ-dmpm)] (8). Syntheses for 1-4 have previously been reported, but the solid-state structures and most properties of 2-4 had not been described. Compounds 5 and 6, with a 1:2 dmpe/Mn ratio, were prepared by reaction of 3 and 4 with base-free 1 and 2, respectively. Compounds 7 and 8 were accessed by reaction of 1 and 2 with 0.5 equiv or more of dmpm per manganese atom. An X-ray structure of 2 revealed a tetrametallic structure with two terminal and six bridging alkyl groups. In the solid state, bisphosphine-coordinated 3-8 adopted three distinct structural types: (a) monometallic [LMnR2], (b) dimetallic [R2Mn(μ-L)2MnR2], and (c) dimetallic [{RMn(μ-R)}2(μ-L)] (L = dmpe, dmpm). Compound 3 exhibited particularly desirable properties for an ALD or CVD precursor, melting at 62-63 °C, subliming at 60°C (5 mTorr), and showing negligible decomposition after 24 h at 120°C. Comparison of variable-temperature solution and solid-state magnetic data provided insight into the solution structures of 2-8. Solution reactions of 1-8 with H2 yielded manganese metal, demonstrating the thermodynamic feasibility of the key reaction steps required for manganese(II) dialkyl complexes to serve, in combination with H2, as precursors for metal ALD or pulsed CVD. In contrast, the solution reactions of 1-8 with ZnEt2 yielded a zinc-manganese alloy with an approximate 1:1 Zn/Mn ratio.
Electrochemical codeposition of copper and manganese from room-temperature N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid
Chen, Po-Yu,Deng, Ming-Jay,Zhuang, Ding-Xuan
, p. 6935 - 6940 (2009)
The voltammetric behavior of N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid (BMP-TFSI) containing Cu(I), Mn(II), or mixtures of Cu(I) and Mn(II) as well as the electrodeposition of copper-manganese alloy coatings (Cu-Mn alloy
Manganese-based layered coordination polymer: Synthesis, structural characterization, magnetic property, and electrochemical performance in lithium-ion batteries
Liu, Qi,Yu, Lili,Wang, Ying,Ji, Yunzhou,Horvat, Josip,Cheng, Mei-Ling,Jia, Xiaoyan,Wang, Guoxiu
, p. 2817 - 2822 (2013)
Manganese-based layered coordination polymer ([Mn(tfbdc)(4,4′-bpy) (H2O)2], Mn-LCP) with microporous structure was synthesized by reaction of 2,3,5,6-tetrafluoroterephthalatic acid(H 2tfbdc) and 4,4′-bipyridine(4,4′-bpy) with manganese(II) acetate tetrahydrate in water solution. Mn-LCP was characterized by elemental analysis, IR spectra, thermogravimetric analysis, X-ray single-crystal structure analysis, and powder X-ray diffraction. Magnetic susceptibility data from 300 to 1.8K show that there is a weak antiferromagnetic exchange between Mn(II) ions in Mn-LCP. As anode material, the Mn-LCP electrode exhibits an irreversible high capacity in the first discharge process and a reversible lithium storage capacity of up to about 390 mA h/g from the fourth cycle. It might provide a new method for finding new electrode materials in lithium-ion batteries
Studies of the reduction mechanism of selenium dioxide and its impact on the microstructure of manganese electrodeposit
Sun, Yan,Tian, Xike,He, Binbin,Yang, Chao,Pi, Zhenbang,Wang, Yanxin,Zhang, Suxin
, p. 8305 - 8310 (2011)
The influence of selenium dioxide (SeO2) on the microstructure and electrodeposition of manganese coatings obtained from a sulfate based neutral solution was investigated by material characterization methods and electrochemical techniques. The crystal structure and surface morphology of these coatings were studied by scanning electron microscopy (SEM) and powder X-ray diffraction spectroscopy (XRD), respectively. The SEM and XRD data showed that SeO2 could effectively accelerate phase transformation, and facilitate leveled and fine grain growth. The electrochemical results indicated that SeO2 could inhibit hydrogen evolution reaction and promote manganese deposition. The action of selenium dioxide in manganese deposition was found to be a reduction and adsorption mechanism. The process could be explained as following: First, Se (IV) was reduced to Se (0), and part of Se (0) future reduce to selenide, which then combined with the remainder Se (0) forming a complicate compound (multi-selenium ions).
Synthesis, characterization, antimicrobial activity and DFT studies of 2-(pyrimidin-2-ylamino)naphthalene-1,4-dione and its Mn(II), Co(II), Ni(II) and Zn(II) complexes
Chioma, Festus,Ekennia, Anthony C.,Ibeji, Collins U.,Okafor, Sunday N.,Onwudiwe, Damian C.,Osowole, Aderoju A.,Ujam, Oguejiofo T.
, p. 455 - 464 (2018)
A pyrimidine-based ligand, 2-(pyrimidin-2-ylamino)naphthalene-1,4-dione (L), has been synthesized by the reaction of 2-aminopyrimidine with 2-hydroxy-1,4-napthoquinone. Reaction of the ligand with Ni(II), Co(II), Mn(II) and Zn(II) acetate gave the corresponding metal complexes which were characterized by spectroscopic techniques, (infrared, electronic), elemental analysis, room-temperature magnetometry, conductance measurements and thermogravimetry-differential scanning calorimetry (TG-DSC) analyses. The room-temperature magnetic data and electronic spectral measurements of the complexes gave evidence of 4-coordinate square planar/tetrahedral geometry. The thermal analyses values obtained indicated the monohydrate complexes. The antimicrobial screening of the compounds showed mild to very good results. The Mn(II) complex showed the best result within in the range of 11.5–29 mm. The electronic, structural and spectroscopic properties of the complexes were further discussed using density functional theory. Molecular docking studies showed significant binding affinity with the drug targets and the metal complexes have potentials to be used as drugs.
FT-IR spectroscopic investigation of some Hofmann type complexes: M(1-phenylpiperazine)2Ni(CN)4 (M = Ni, Co, Cd, Pd or Mn)
Senyel, Mustafa,Parlak, Cemal,Alver, Oezguer
, (2008)
New Hofmann type complexes in the form of M(pp)2Ni(CN)4 (where pp = 1-phenylpiperazine and M = Ni, Co, Cd, Pd or Mn) have been prepared in powder form and their infrared spectra have been reported in the range of (4000-400) cm-1
Electrochemical behavior of manganese in chloride-bromide-ammonium electrolytes
Kozin,Mashkova,Manilevich,Danil'tsev
, p. 730 - 733 (2007)
Halide-ammonium electrolytes were developed for electrochemical production of high-purity manganese.
Anti-hepatocellular carcinoma, antioxidant, anti-inflammation and antimicrobial investigation of some novel first and second transition metal complexes
Hassan, Safaa S.,Khalf-Alla, Perihan A.
, (2020/02/05)
New coordination compounds of some selected metal ions from the first and second transition metals series with a Schiff base were synthesized and characterized. The Schiff base is derived from 4-Aminoantipyrine and 3-(hydroxyimino) butan-2-one. The compounds were characterized by different analysis tools like; elemental analysis, mass spectra, Fourier transform infrared (FTIR) as well as electronic spectra, magnetic measurements, molar conductance and thermal analysis technique. All complexes were formed with 1:1 (metal: ligand) stoichiometry except Mn (II) where 1:2 (Mn: ligand) is formed. Schiff base ligand interacted as a tridentate ligand by using the nitrogen atoms of the imine and the oximato groups and the carbonyl oxygen atom as donor groups with all studied metal ions except copper (II) and manganese (II) where the carbonyl oxygen is not shared in the coordination. These complexes show various physicochemical properties. X-ray powder diffraction shows different crystal systems; Cd (II) complex: hexagonal, Cu (II) complex: orthorhombic; and [Ni (II), Mn (II), Rh (III) & Pd (II)] complexes: monoclinic. All compounds showed potent cytotoxicity against the growth of human liver cancer cell lines. The square planar Pd (II) complex was more active than those of octahedral geometries of all other synthesized complexes. Cd (II) complex has the highest microbial growth inhibition than the rest of the prepared complexes. The docking active sites interactions were evaluated using the selected proteins EGFR tyrosine kinase and protein crystal structure of GlcN-O-P synthase. in vitro antioxidant assay revealed potent free radical scavenging activity of the three synthesized Cu (II), Pd (II) and Rh (III) complexes that exceeded the standard ascorbic acid. Pd (II) complex shows the most significant inhibition denaturation percent.
