Relevant bibliographies by topics / Cobalt acetate

Academic literature on the topic 'Cobalt acetate'

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Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Cobalt acetate"

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Goswami, Partha P., Hanif A. Choudhury, Sankar Chakma, and Vijayanand S. Moholkar. "Sonochemical Synthesis of Cobalt Ferrite Nanoparticles." International Journal of Chemical Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/934234.

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Cobalt ferrite being a hard magnetic material with high coercivity and moderate magnetization has found wide-spread applications. In this paper, we have reported the sonochemical synthesis of cobalt ferrite nanoparticles using metal acetate precursors. The ferrite synthesis occurs in three steps (hydrolysis of acetates, oxidation of hydroxides, and in situ microcalcination of metal oxides) that are facilitated by physical and chemical effects of cavitation bubbles. The physical and magnetic properties of the ferrite nano-particles thus synthesized have been found to be comparable with those reported in the literature using other synthesis techniques.
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Yang, Xia, and Hui Ping Shao. "Synthesis and Characterization of Cobalt Nanoparticles by Cobalt-Acetate." Advanced Materials Research 503-504 (April 2012): 346–49. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.346.

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In this study, cobalt nanoparticles with an average size of 16 nm were synthesized using cobalt-acetate as precursor. Besides oleylamine and oleic acid, sodium oleate was selected as surfactants to control the size of particles. The obtained particles show cubic shape and uniformly disperse. The hysteresis curve of cubic nanoparticles detected by vibrating sample magnetometer (VSM) reveals that the coercive force Hc is 297.62 Oe and the saturation magnetization Ms is 56.55 emu/g.
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Beattie, James K., Corina U. Beck, Peter A. Lay, and Anthony F. Masters. "Chemistry of Cobalt Acetate. 7. Electrochemical Oxidation of μ3-Oxo-Centered Cobalt(III) Acetate Trimers." Inorganic Chemistry 42, no. 25 (December 2003): 8366–70. http://dx.doi.org/10.1021/ic0345525.

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Liang, Zhen-Hua, Ying-Jie Zhu, Guo-Feng Cheng, and Yue-Hong Huang. "Microwave-assisted synthesis of β-Co(OH)2 and Co3O4 nanosheets via a layered precursor conversion method." Canadian Journal of Chemistry 84, no. 8 (August 1, 2006): 1050–53. http://dx.doi.org/10.1139/v06-134.

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Single crystalline β-Co(OH)2 nanosheets have been synthesized from a layered precursor cobalt(II) acetate hydroxide by microwave heating. The average thickness of β-Co(OH)2 nanosheets is ~10 nm, with particle sizes up to 360 nm. The layered precursor was prepared using Co(CH3COO)2·4H2O, ethylene glycol, and H2O in some cases by microwave heating. Co3O4 nanosheets have been synthesized by hydrothermal oxidation of the layered precursor cobalt(II) acetate hydroxide using H2O2.Key words: nanosheets, microwave, cobalt hydroxide, cobalt oxide.
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Kamal, S. S. Kalyan, A. Pavan Kumar, J. Vimala, N. V. Rama Rao, B. Majumdar, P. Ghosal, and L. Durai. "In situ synthesis of cobalt and cobalt carbide nanostructures using decomposition of cobalt acetate." Journal of Alloys and Compounds 748 (June 2018): 814–17. http://dx.doi.org/10.1016/j.jallcom.2018.03.194.

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Mehrbod, Mohammad, Michela Martinelli, Caleb D. Watson, Donald C. Cronauer, A. Jeremy Kropf, and Gary Jacobs. "Fischer-Tropsch Synthesis: The Characterization and Testing of Pt-Co/SiO2 Catalysts Prepared with Alternative Cobalt Precursors." Reactions 2, no. 2 (June 1, 2021): 129–60. http://dx.doi.org/10.3390/reactions2020011.

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Different low-cost cobalt precursors (acetate, chloride) and thermal treatments (air calcination/H2 reduction versus direct H2-activation) were investigated to alter the interaction between cobalt and silica. H2-activated catalysts prepared from cobalt chloride had large Co0 particles (XRD, chemisorption) formed by weak interactions between cobalt chloride and silica (temperature programmed reduction (TPR), TPR with mass spectrometry (TPR-MS), TPR with extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge spectroscopy (XANES) techniques) and retained Cl-blocked active sites, resulting in poor activity. In contrast, unpromoted Co/SiO2 catalysts derived from cobalt acetate had strong interactions between Co species and silica (TPR/TPR-MS, TPR-EXAFS/XANES); adding Pt increased the extent of the Co reduction. For these Pt-promoted catalysts, the reduction of uncalcined catalysts was faster, resulting in larger Co0 clusters (19.5 nm) in comparison with the air-calcined/H2-activated catalyst (7.8 nm). Both catalysts had CO conversions 25% higher than that of the Pt-promoted catalyst prepared in the traditional manner (air calcination/H2 reduction using cobalt nitrate) and three times higher than that of the traditional unpromoted Co/silica catalyst. The retention of residual cobalt carbide (observed in XANES) from cobalt acetate decomposition impacted performance, resulting in a higher C1–C4 selectivity (32.2% for air-calcined and 38.7% for uncalcined) than that of traditional catalysts (17.5–18.6%). The residual carbide also lowered the α-value and olefin/paraffin ratio. Future work will focus on improving selectivity through oxidation–reduction cycles.
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BLAKE, A. B., J. R. CHIPPERFIELD, S. LAU, and D. E. WEBSTER. "ChemInform Abstract: Nature of Cobalt(III) Acetate." ChemInform 22, no. 11 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199111274.

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Morimoto, Takashi, Masao Hirano, Takashi Enokida, Akihito Isomoto, Takayoshi Hamaguchi, and Xumin Zhung. "Oxidation by cobalt(III) acetate. Part 11. Oxidation of conjugated dienes by cobalt(III) acetate in acetic acid." Journal of the Chemical Society, Perkin Transactions 2, no. 8 (1988): 1531. http://dx.doi.org/10.1039/p29880001531.

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Hirano, Masao, Tadamichi Ishii, and Takashi Morimoto. "Oxidation by Cobalt(III) Acetate. Part 13. Oxidation of Substituted Phenols with Cobalt(III) Acetate in Acetic Acid." Bulletin of the Chemical Society of Japan 64, no. 4 (April 1991): 1434–36. http://dx.doi.org/10.1246/bcsj.64.1434.

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Bao, Wenya, Xiaofen Fu, Kaiqi Hu, and Yecong Zhao. "Adsorption and Photo-catalytic Properties of Congo Red by Cobalt Doped Porous ZnO Prepared Through Hydrothermal Method." E3S Web of Conferences 185 (2020): 04048. http://dx.doi.org/10.1051/e3sconf/202018504048.

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ZnO and cobalt doped ZnO were prepared by hydrothermal method with zinc acetate dihydrate, cobalt acetate tetrahydrate and urea as raw materials and sodium citrate as surface modifier. Congo red (CR) was used as the pollutant model for adsorption and photo-catalytic experiments. Under the same conditions, the adsorption effect of cobalt doped ZnO with different urea content on CR was investigated, and the optimum urea content was determined. Under the same conditions, the adsorption and photocatalytic properties of cobalt doped ZnO prepared with the best urea content at different annealing temperatures were studied. According to the analysis of experimental data, the adsorption effect of Co doped ZnO with urea content of 8mmol and annealing temperature of 300℃ is the best, and the photocatalytic effect is also the best under the same conditions.
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Dissertations / Theses on the topic "Cobalt acetate"

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Lau, S. "Cobalt(III) acetate - its structures and catalytic activity." Thesis, University of Hull, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233969.

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Clatworthy, Edwin Byrne. "Investigations of Cobalt Acetate and Titanium Nitride for Catalytic and Sustainable Chemistry." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19641.

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The development of cheap industrial scale H2 production from renewable sources is highly desirable to meet our future clean-energy demands. One promising route is water splitting using solar radiation. In this thesis, the individual components of a photocatalytic system were explored with the aim of applying earth-abundant and industrially relevant catalyst materials for sustainable chemistry. A family of cobalt acetate compounds was examined as potential water and biomass oxidation catalysts, and TiN nanoparticles were investigated as co-catalysts for photocatalytic hydrogen evolution. A significant challenge for realising industrial scale water splitting is the development of efficient, stable, and earth-abundant catalysts for the water oxidation half reaction. Co(III) species have long been known to facilitate water oxidation and cobalt acetate has been employed as a versatile industrial oxidation catalyst of alkyl aromatic molecules over the last 60 years. This has inspired a series of investigations to evaluate several oligomers from a family of cobalt acetate compounds as water oxidation catalysts (WOCs). Three model Co(III) acetate oligomers of different nuclearity, the Co-cubane, [Co4(μ3-O)4(μ-OAc)4(py)4], Co-trimer, [Co3(μ3-O)(μ-OAc)6(py)3][PF6], and Co-dimer, [Co2(μ-OH)2(μ-OAc)(OAc)2(py)4][PF6] were assessed. Complementary to developing more efficient WOCs, an alternative approach is to employ sacrificial agents, such as aromatic molecules, that are more easily oxidised than water. The ability of cobalt acetate to oxidise a variety of lignin model compounds was also explored. Lastly, commercialised semiconductors (i.e. TiO2) are restricted to absorbing ~ 5% of the energy of the terrestrial solar spectrum. TiN nanoparticles were explored as co-catalysts with TiO2 (P25) for photocatalytic H2 evolution via MeOH reformation due to their unique optical properties.
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Ditalelo, Gofetamang. "The role of cobalt and nickel in biogas production from anaerobic digestion of acetate." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7156/.

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While the individual need for dosage of nickel and cobalt in anaerobic digesters has been established, together with the biochemistry underpinning such need; their co-requisite in anaerobic digestion of acetate has not been extensively studied. In addition, the balance between the catalytic and toxic concentrations of nickel and cobalt in anaerobic acetate digesters is not well documented. The aim of this study was to examine and evaluate the effects of individual and combined dosage of nickel and cobalt on biogas production as well as on methanogenic population balance of a mesophilic (37°C) anaerobic acetate digester so as to determine their catalytic and toxic concentrations. Four semi-CSTR digesters were daily fed acetate at a loading rate of 1.8 g L-1 d-1 and were operated at a HRT of 10 days for this investigation. Co-dosage of nickel and cobalt in anaerobic acetate digesters were found to lead to increased biogas production in an additive manner, with the sole dosage of nickel resulting in more biogas production than that of cobalt. At a large enough concentration, these elements were found to inhibit biogas production.
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Anwar, Amin Ahmed. "Catalytic Oxidation of 4-t-butyltoluene." University of Sydney. Chemistry, 2003. http://hdl.handle.net/2123/506.

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The oxidation of 4-t-butyltoluene in glacial acetic acid by hydrogen peroxid in a process catalysed by cobalt(II) acetate tetrahydrate and sodium bromide has been studied with the aim of increasing the selectivity towards 4-t-butylbenzaldehyde.
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Anwar, Amin Ahmed. "Catalytic Oxidation of 4-t-butyltoluene." Thesis, The University of Sydney, 2002. http://hdl.handle.net/2123/506.

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The oxidation of 4-t-butyltoluene in glacial acetic acid by hydrogen peroxid in a process catalysed by cobalt(II) acetate tetrahydrate and sodium bromide has been studied with the aim of increasing the selectivity towards 4-t-butylbenzaldehyde.
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Rocha, Beatriz Aline Riga [UNESP]. "Síntese de ligantes diimínicos para obtenção de complexos organocobalto(III) para polimerização radicalar mediada por cobalto." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/149815.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Neste trabalho objetivou-se a síntese e caracterização de oito complexos de cobalto(II) que fossem aptos a atuarem como agentes controladores na Polimerização Radicalar Mediada por Cobalto do monômero acetato de vinila. Através da modulação da esfera de coordenação destes complexos com a alteração dos efeitos estéricos e eletrônicos promovidos pela coordenação de ligantes α-diiminas, buscou-se estabelecer parâmetros para propor a forma como estes complexos mediam a CMRP do referido monômero. Os complexos foram divididos em dois grupos, objetivando uma avaliação mais eficiente da forma como os efeitos estéricos e eletrônicos interferem na capacidade controladora dos mesmos. Após a variação sistemática das proporções molares entre complexo, iniciador e monômero encontrou-se na proporção [Co]/[AIBN]/[VAc] = 1/3,25/542 os resultados mais satisfatórios deste trabalho. O uso de DMSO fora prejudicial para os complexos 2a-c, porém fez com que os complexos 2d-h apresentassem melhorias, reduzindo seus valores de polidispersidade e aumentando as massas moleculares dos polímeros. O complexo 2b fora escolhido como o melhor controlador do grupo do efeito estérico, por reunir em si as características estérias e eletrônicas que o fizeram apresentar os menores valores de polidispersidade (Đmáx = 1,43). Com relação ao grupo de complexos do efeito eletrônico, fora o complexo 2f que, devido à maior estabilidade estrutural conferida ao complexo por seu substituinte cicloexil, apresentara as menores polidispersidades de seu grupo, entre 1,12 e 1,58.
This work aimed the synthesis and characterization of eight cobalt(II) complexes which could be able to act as controlling agents in vinyl acetate radical polymerization mediated by cobalt. By modulating the coordination sphere of these complexes, modifying the steric and electronic effects offered by the α-diimine ligands, we sought to establish parameters to propose how these complexes mediate the CMRP of vinyl acetate. The complexes were split in two groups in way to assess efficiently how the electronic and steric effects can affect the controlling capacity of the CoII(α-diimine).A systematic variation of the molar ratio such as [Co]/[initiator] and [Co]/[monomer] made it possible to choose [Co]/[initiator]/[monomer] = 1/3.25/542 as the ratio that provided certain level of control. The addition of DMSO was detrimental to the complexes 2a-c, but caused an improvement to the activity of complexes 2dh, reducing their polydispersity values and increasing the molecular weights of the polymers. Complex 2b was chosen as the best controller of the steric effect group, its steric and electronic characteristics made possible to reach the lowest polydispersity of its group (Đmax = 1.43).Regarding to the group of complexes of the electronic effect, it was the complex 2f that had the smallest polydispersity of its group, between 1.12 and 1.58, due to the greater structural stability conferred to the complex by its cyclohexyl substituent.
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Sás, Juliana Frizarin Campos [UNESP]. "Síntese e aplicação de complexos de cobalto(II) coordenados a ligantes tetraimínicos na polimerização radicalar de acetato de vinila mediada por organometálicos." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150487.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O trabalho reporta a síntese de dois novos complexos de cobalto(II), coordenados a ligantes tetraimínicos, estes foram denominados [Co(beb)](PF6)2 e [Co(bfb)](PF6)2. Os complexos foram caracterizados por Espectroscopia de Infravermelho (FT-IR), Espectroscopia de Ultravioleta-visível (UV-Vis) e Voltametria Cíclica (VC). A polimerização radicalar de acetato de vinila (VAc) foi iniciada pelo azobisisobutironitrila (AIBN) e realizada na presença de [Co(beb)](PF6)2 ou [Co(bfb)](PF6)2 como agentes controladores, a temperatura de 65 ºC. As massas moleculares de poliacetato de vinila (PVAc) foram analisadas por GPC e Cg.
This study describes the synthesis of two novel cobalt(II) complexes, coordinated to tetraimine ligands [Co(beb)](PF6)2 and [Co(bfb)](PF6)2, where beb = 1,2-diphenylethane-bis(N2 -benzylidene-N1 -methyleneethane- 1,2-diamine) and bfb = 1,2-diphenylethane-bis(N2 -benzylide-N1 - methylenebenzene-1,2-diamine). The complexes were characterized by FT-IR, UV-Vis and Cyclic Voltammetry. The radical polymerization of vinyl acetate (VAc) initiated by azobisisobutyronitrile (AIBN) was carried out under different reaction conditions in the presence of [Co(beb)](PF6)2 or [Co(bfb)](PF6)2 as mediators. The systematic variation of the reaction conditions, such as [initiator]/[Co] and [monomer]/[Co] molar ratios, affected the polymerization rates and the molecular weights, reaching a certain level of control. The [Co(beb)](PF6)2 complex was shown to be more efficient in controlling the polymerization of VAc when compared to the [Co(bfb)](PF6)2 complex.
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Mougenot, Pierre. "Etude theorique ab initio scf et ci de complexes organometalliques binucleaires." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13025.

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Analyse approfondie du spectre photoelectronique se(fe(c::(5)h::(5)))::(2)(no)::(2). Etude critique des resultats experimentaux anterieurs concernant le diamagnetisme suppose se(co(c::(5)h::(5)))::(2)(no)::(2). Bon accord avec l'experience dans l'etude theorique de l'etat fondamental du cation dirhodium tetraacetate dihydrate. Etude sur la nature de l'interaction metal-metal dans (v(c::(5)h::(5)))::(2) (c::(8)h::(8))
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Sás, Juliana Frizarin Campos. "Síntese e aplicação de complexos de cobalto(II) coordenados a ligantes tetraimínicos na polimerização radicalar de acetato de vinila mediada por organometálicos /." São José do Rio Preto, 2017. http://hdl.handle.net/11449/150487.

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Orientador: Beatriz Eleutério Goi
Banca: Daniela Martins Fernandes de Oliveira
Banca: Silvânia Lanfredi Nobre
Resumo: O trabalho reporta a síntese de dois novos complexos de cobalto(II), coordenados a ligantes tetraimínicos, estes foram denominados [Co(beb)](PF6)2 e [Co(bfb)](PF6)2. Os complexos foram caracterizados por Espectroscopia de Infravermelho (FT-IR), Espectroscopia de Ultravioleta-visível (UV-Vis) e Voltametria Cíclica (VC). A polimerização radicalar de acetato de vinila (VAc) foi iniciada pelo azobisisobutironitrila (AIBN) e realizada na presença de [Co(beb)](PF6)2 ou [Co(bfb)](PF6)2 como agentes controladores, a temperatura de 65 ºC. As massas moleculares de poliacetato de vinila (PVAc) foram analisadas por GPC e Cg
Abstract: This study describes the synthesis of two novel cobalt(II) complexes, coordinated to tetraimine ligands [Co(beb)](PF6)2 and [Co(bfb)](PF6)2, where beb = 1,2-diphenylethane-bis(N2 -benzylidene-N1 -methyleneethane- 1,2-diamine) and bfb = 1,2-diphenylethane-bis(N2 -benzylide-N1 - methylenebenzene-1,2-diamine). The complexes were characterized by FT-IR, UV-Vis and Cyclic Voltammetry. The radical polymerization of vinyl acetate (VAc) initiated by azobisisobutyronitrile (AIBN) was carried out under different reaction conditions in the presence of [Co(beb)](PF6)2 or [Co(bfb)](PF6)2 as mediators. The systematic variation of the reaction conditions, such as [initiator]/[Co] and [monomer]/[Co] molar ratios, affected the polymerization rates and the molecular weights, reaching a certain level of control. The [Co(beb)](PF6)2 complex was shown to be more efficient in controlling the polymerization of VAc when compared to the [Co(bfb)](PF6)2 complex
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Riga, Rocha Beatriz Aline. "Síntese de ligantes diimínicos para obtenção de complexos organocobalto(III) para polimerização radicalar mediada por cobalto /." São José do Rio Preto, 2017. http://hdl.handle.net/11449/149815.

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Orientador: Beatriz Eleutério Goi
Banca: Giovana Gioppo Nunes
Banca: Sérgio Antônio Marques de Lima
Resumo: Neste trabalho objetivou-se a síntese e caracterização de oito complexos de cobalto(II) que fossem aptos a atuarem como agentes controladores na Polimerização Radicalar Mediada por Cobalto do monômero acetato de vinila. Através da modulação da esfera de coordenação destes complexos com a alteração dos efeitos estéricos e eletrônicos promovidos pela coordenação de ligantes α-diiminas, buscou-se estabelecer parâmetros para propor a forma como estes complexos mediam a CMRP do referido monômero. Os complexos foram divididos em dois grupos, objetivando uma avaliação mais eficiente da forma como os efeitos estéricos e eletrônicos interferem na capacidade controladora dos mesmos. Após a variação sistemática das proporções molares entre complexo, iniciador e monômero encontrou-se na proporção [Co]/[AIBN]/[VAc] = 1/3,25/542 os resultados mais satisfatórios deste trabalho. O uso de DMSO fora prejudicial para os complexos 2a-c, porém fez com que os complexos 2d-h apresentassem melhorias, reduzindo seus valores de polidispersidade e aumentando as massas moleculares dos polímeros. O complexo 2b fora escolhido como o melhor controlador do grupo do efeito estérico, por reunir em si as características estérias e eletrônicas que o fizeram apresentar os menores valores de polidispersidade (Đmáx = 1,43). Com relação ao grupo de complexos do efeito eletrônico, fora o complexo 2f que, devido à maior estabilidade estrutural conferida ao complexo por seu substituinte cicloexil,...
Abstract: This work aimed the synthesis and characterization of eight cobalt(II) complexes which could be able to act as controlling agents in vinyl acetate radical polymerization mediated by cobalt. By modulating the coordination sphere of these complexes, modifying the steric and electronic effects offered by the α-diimine ligands, we sought to establish parameters to propose how these complexes mediate the CMRP of vinyl acetate. The complexes were split in two groups in way to assess efficiently how the electronic and steric effects can affect the controlling capacity of the CoII(α-diimine).A systematic variation of the molar ratio such as [Co]/[initiator] and [Co]/[monomer] made it possible to choose [Co]/[initiator]/[monomer] = 1/3.25/542 as the ratio that provided certain level of control. The addition of DMSO was detrimental to the complexes 2a-c, but caused an improvement to the activity of complexes 2dh, reducing their polydispersity values and increasing the molecular weights of the polymers. Complex 2b was chosen as the best controller of the steric effect group, its steric and electronic characteristics made possible to reach the lowest polydispersity of its group (Đmax = 1.43).Regarding to the group of complexes of the electronic effect, it was the complex 2f that had the smallest polydispersity of its group, between 1.12 and 1.58, due to the greater structural stability conferred to the complex by its cyclohexyl substituent
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Books on the topic "Cobalt acetate"

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Haigh, Dale Gregory. The influence of natural material present in groundwater and organic ligands EDTA and acetate on the sorption ofiodine, cobalt, caesium, strontium, europium and neptunium onto glacial sediment. 1990.

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Book chapters on the topic "Cobalt acetate"

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Holze, Rudolf. "Ionic conductance of cobalt acetate." In Electrochemistry, 815. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49251-2_767.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) acetate complex with thymine." In Magnetic Properties of Paramagnetic Compounds, 1014–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_591.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) acetate complex with fluorenone anthranilic acid." In Magnetic Properties of Paramagnetic Compounds, 897–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_494.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of polymer complex of secondary cellular acetate (sca) with cobalt(II)." In Magnetic Properties of Paramagnetic Compounds, 1033–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_601.

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Debuigne, Antoine, Christophe Detrembleur, Rayna Bryaskova, Jean-Raphaël Caille, and Robert Jérôme. "Cobalt-Mediated Radical Polymerization of Vinyl Acetate: A New Tool for Macromolecular Engineering." In ACS Symposium Series, 372–86. Washington, D C: American Chemical Society, 2006. http://dx.doi.org/10.1021/bk-2006-0944.ch026.

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Debuigne, Antoine, Rinaldo Poli, Robert Jérôme, Christine Jérôme, and Christophe Detrembleur. "Key Role of Metal-Coordination in Cobalt-Mediated Radical Polymerization of Vinyl Acetate." In ACS Symposium Series, 131–47. Washington, DC: American Chemical Society, 2009. http://dx.doi.org/10.1021/bk-2009-1024.ch009.

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Chen, Yi-Hao, Hung-Hsun Lu, Jia-Qi Li, and Chi-How Peng. "Catalytic Chain Transfer Polymerization and Reversible Deactivation Radical Polymerization of Vinyl Acetate Mediated by Cobalt(II) Phenoxy-imine Complexes." In ACS Symposium Series, 335–48. Washington, DC: American Chemical Society, 2018. http://dx.doi.org/10.1021/bk-2018-1284.ch016.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) acetate complex with Schiff-base derived from condensation of 5-[4′-(nitrophenyl)azo]salicylaldehyde with thiosemicarbazone." In Magnetic Properties of Paramagnetic Compounds, 981–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_564.

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Pardasani, R. T., and P. Pardasani. "Molar magnetic moment of cobalt(II) acetato complex with 3,5-dibenzyloxybenzoyl hydrazone." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 2, 795–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62466-1_351.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) acetato complex with 2-formylpyridine-N(4)antipyrinylthiosemicarbazone." In Magnetic Properties of Paramagnetic Compounds, 935–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_498.

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Conference papers on the topic "Cobalt acetate"

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Kim, Gye-Nam, Won-Zin Oh, Hui-Jun Won, and Min-Gil Kim. "TRIGA Soil Decontamination by Electrokinetic Method." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4711.

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The experiment for removing cesium and cobalt from the contaminated soil around the TRIGA reactor in Korea using the electrokinetic method were conducted. To increase removal efficiency by the electrokinetic method, a device to restrain the pH increase in the soil column was suggested. An acetate buffer solution (CH3COONa+CH3COOH) was injected into the soil column and acetic acid periodically was injected into the cathode reservoir to restrain any pH increase. Many 137Cs and 60Co were transferred by electromigration rather than electroomosis during the intial remediation period, and no precipitate was formed in the soil column. 25% of cesium radioactivity in the soil column was removed after 10 days, while 94% of cobalt radioactivity was removed. Furthermore, the remaining radioactive concentrations predicted by the developed numerical model were similar to those obtained by experiment.
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Ramis, Gianguido, Guido Busca, Tania Montanari, Michele Sisani, and Umberto Costantino. "Ni-Co-Zn-Al Catalysts From Hydrotalcite-Like Precursors for Hydrogen Production by Ethanol Steam Reforming." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33034.

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A series of well crystallized Ni-Co-Zn-Al LDHs materials has been prepared by the urea hydrolysis method as precursors of mixed oxide catalysts for the Ethanol Steam Reforming (ESR) reaction. The calcination of the layered precursors gives rise to high surface area mixed oxides, mainly a mixture of rock-salt phase (NiO), wurtzite phase (ZnO) and spinel phase. Both precursors and mixed oxides have been throughtfully characterized and the steam reforming of ethanol has been investigated over the calcined catalysts in flow reactor and in-situ FT-IR experiments. The data here reported provide evidence of the good catalytic activity of Co-Zn-Al and Co-Ni-Zn-Al catalysts prepared from hydrotalcite-like LHD precursors for ethanol steam reforming. At 823 K the most active Co/Ni catalyst containains a predominant spinel phase with composition near Zn0.58Ni0.42[Al0.44Co0.56]2O4 and small amounts of NiO and ZnO. On the other side, at 873 K the selectivity to hydrogen increases with cobalt content. In particular, the presence of cobalt increases selectivity to H2 and CO2 and decreases selectivity to methane in the low temperature range 720–870 K. The most selective catalyst is the Ni-free Co-Zn-Al mixed oxide essentially constituted by a single spinel type phase Zn0.55Co0.45[Al0.45Co0.55]2O4. Cobalt catalysts appear consequently to behave better than nickel based catalysts in this temperature range. The key feature for high selectivity to hydrogen is proposed to be associated to a stability of a relatively high oxidation state at the catalyst surface, the most relevant selectivity determining step being constituted by the evolution of surface acetate species. In fact, over oxidized catalyst surface the acetate species evolve producing carbon dioxide and hydrogen while over a more reduced surface they evolve giving rise to methane and COx. Water is supposed to have the main role of allowing surface sites to stay in an unreduced state at least in the temperature range 720–870 K.
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Karhu, M., J. Lagerbom, K. Kaunisto, T. Suhonen, T. Lindroos, and E. Turunen. "Nanostructural WC-Co Coatings by Utilizing Novel Powder Manufacturing Route Using Water Soluble Raw Materials." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0451.

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Abstract Tungsten carbide -based hard metal coatings are extensively used in demanding industrial applications like for wear protection purposes. Continuously increasing demands set new limits and need for materials with enhanced features. One solution is to improve hard metal properties by nanostructures. Presented study is part of a research where novel and safe route to manufacture nanostructural WC-Co powders starting from water soluble raw materials was developed. In this study powders’ workability in thermal sprayings is studied. WC-12Co powder was manufactured using water soluble raw materials: ammonium metatungstate as a tungsten source, glycine as a carbon source and cobalt acetate as a cobalt source. The powder was manufactured via optimized spray drying and heat treatment method producing a correct phase structure and chemical composition. Experimental powder was sprayed by HVAF-spraying to study its workability and functionality. Morphology, microstructure and properties were analyzed from the experimental nanostructural powder and the HVAF-coatings.
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Sudibyo, B. B. Aji, and S. Priyanto. "The feed forward neural network model for liquid-liquid extraction and separation of cobalt (II) from sodium acetate media using cyanex 272." In PROCEEDINGS FROM THE 14TH INTERNATIONAL SYMPOSIUM ON THERAPEUTIC ULTRASOUND. Author(s), 2017. http://dx.doi.org/10.1063/1.4978087.

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Kumar, Anand, and Anchu Ashok. "Catalytic Decomposition of Ethanol over Bimetallic Nico Catalysts for Carbon Nanotube Synthesis." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0039.

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In this work we investigate the use of NiCo bimetal/oxide as catalyst for hydrogen production from ethanol, with a focus on the deactivation pattern and the nature of the observed carbon deposition. It is well known that sintering and coke deposition during decomposition reaction significantly reduces the activity of the catalysts at higher temperature, by blocking the active sites of the catalysts. During ethanol decomposition reaction, the cleavage of C-C bond produces adsorbed *CH4 and *CO species that further decompose to form carbonaceous compounds. FTIR in-situ analysis was conducted between 50 to 400°C for all the catalysts to understand the reaction mechanism and product selectivity. Cobalt was found to be selective for aldehyde and acetate, whereas bimetallic Ni-Co was selective for the formation of CO at 400°C along with aldehyde. Complete conversion of ethanol was observed at 350°C and 420°C for NiCo and Cobalt respectively indicating an improvement in the rate of conversion when Ni was added to cobalt. The crystallinity, morphology and particle analysis of the used catalyst after reaction were studied using XRD, SEM and TEM respectively. The XRD shows the complete phase change of porous NiCoO2 to NiCo alloy and SEM indicates the presence of fibrous structure on the surface with 91.7 % of carbon while keeping 1:1 ratio of Ni and Co after the reaction. The detailed analysis of carbon structure using HRTEM-STEM shows the simultaneous growth of carbon nano fibers (CNFs) and multiwalled carbon nanotubes (MWCNTs) that were favored on larger and smaller crystallites respectively. Analysis of carbon formation on individual Co catalyst and bimetallic NiCo catalyst shows a clear difference in the initiation pattern of carbon deposition. Metallic Co nanoparticles were found to be more mobile where Co disperses along the catalysts surface, whereas NiCo nanoparticles were relatively less mobile, and maintained their structure.
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Abdullayev, E., A. Joshi, W. Wei, Y. Zhao, and Y. Lvov. "Economically Viable Fabrication Method of Nanocomposite Materials From Linear Arrays of Metallic Nanoparticles and Nanorods on Tubular Halloysite Templates." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87006.

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In this work, we report a simple fabrication method for metal nanoparticles and nanorods on halloysite supports. Silver nanorods of 15 nm diameter were synthesized by thermal decomposition of silver acetate within halloysite lumen. Nanorods had crystalline nature with [111] axis oriented ∼ 68° from the halloysite tubule main axis. Linear arrays from gold, iron, cobalt and palladium nanoparticles on halloysite external surface were also synthesized by chemical and thermal reduction method. Samples were analyzed by high-resolution transmission electron microscopy and field-emission scanning electron microscopy. These in situ syntheses offer a simple method for large scale fabrication of metallic nanorods and core-shell ceramic nanocomposites, which can be used as antimicrobial additives in plastic composites, nanoelectronic and optical materials with biocompatibility and environmentally friendly. Antimicrobial thin films were prepared based on halloysite-silver nanocomposites and tested on E. Coli and S Aureus bacterial culture. Antibacterial performance of the nanocomposite material was superior to the other conventional antimicrobial additives (silver doped bioactive glasses and carbon nanotubes). Radiation protection coatings based on fabricated nanocomposite materials is under development.
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Moreno-Hernandez, Lizbeth, Santiago Ospina-Rivas, Urel Andreas Espadín - Davila, Marko Jeran, and Rigoberto Barrios-Francisco. "Dehydrogenation of Hantzsch Dihydropyridines with Hetero-geneous Cobalt Oxide Catalyst Supported in N-Doped Acti-vated Carbon." In Socratic Lectures 7. University of Lubljana Press, 2022. http://dx.doi.org/10.55295/psl.2022.d17.

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Hantzsch dihydropyridines represent an important source of hydrogen to be transfered to other un-saturated organic molecules, leading the formation of pyridine aromatic ring as driving force. The hydrogen transfer process was evaluated using 1,4-dyhydropyridines and heterogeneous cobalt cat-alyst supported over N-doped activated carbon. The 4-position of the dihydropyridine ring was sub-stituted with H (4a), Me (4b) and Ph (4c) groups, showing that only 1 reacted to yield the correspond-ing pyridine compound indicating that the presence of steric hindrance took place on the reaction. Additionally; three solvents –tetrahydrofuran (THF), acetone, and acetonitrile– were tested, showing reactivity only with unsaturated ones, but not with THF. This observation indicates that dihydro-pyridine works as hydrogen donor and solvent as hydrogen aacceptor in the hydrogen transfer pro-cess. Keywords: Hantzsch dihyropyridine; Heterogeneous cobalt oxide catalyst; Hydrogen transfer; Unsaturated solvents
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Ma, A., D. S. Lee, H. J. Park, J. E. Lee, D. Y. Kim, H. K. Lee, J. H. Seo, and K. M. Nam. "P2NG.16 - Spontaneous Deposition of Cobalt Oxide Nanoplates for Application to Acetone Gas Sensors." In 17th International Meeting on Chemical Sensors - IMCS 2018. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2018. http://dx.doi.org/10.5162/imcs2018/p2ng.16.

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Anschau, Andréia, Andréia Anschau, Rebeca Becker Miranda, and Eliza Taborda Afonso. "AVALIAÇÃO DE RESISTÊNCIA A METAIS PESADOS PELA BACTÉRIA BACILLUS AERIUS BA04." In II Congresso Brasileiro de Biotecnologia On-line. Revista Multidisciplinar de Educação e Meio Ambiente, 2022. http://dx.doi.org/10.51189/conbiotec/13.

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Introdução: A contaminação do meio ambiente por metais pesados começou com o avanço e crescimento das atividades industriais, em função do descarte incorreto de resíduos de indústrias químicas, metalúrgicas e da agricultura, juntamente com a falta de tratamentos adequados de efluentes gerados pelas mesmas. Os metais pesados podem causar danos à saúde animal e humana devido ao acúmulo destes na água e no solo. A biorremediação por microrganismos vem se tornando uma ferramenta de grande potencial para a descontaminação dos ambientes contendo metais pesados. Objetivo: O objetivo deste estudo foi analisar a resistência da bactéria Bacillus Aerius BA04 frente a metais pesados. Material e métodos: Foram feitos nove cultivos em meio sólido usando a técnica de placa inclinada com meio Mueller Hinton acrescido de concentrações crescentes (até as concentrações máximas requeridas pela resolução 430/2011 do CONAMA) dos seguintes sais de metais pesados: acetato de chumbo II, sulfato de ferro II, sulfato de alumínio, sulfato de mercúrio, sulfato de zinco, sulfato de cobre, cloreto de cobalto e nitrato de cobalto. Os cultivos foram feitos em duplicate e conduzidos a 35 °C durante 7 dias. Resultados: A bactéria B. Aerius BA04 cresceu de forma homogênea na superfície de todas as placas com exceção do meio contendo sulfato de mercúrio no qual foi observada inibição do crescimento bacteriano, mesmo na região de baixa concentração do metal pesado. Conclusão: O estudo revelou que a bactéria B. Aerius BA04 apresenta resistência a altas concentrações dos metais tóxicos testados, caracterizando potencial para biorremediação de ambientes contaminados com diversos metais pesados, reduzindo a toxicidade desses metais.
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