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Artículos de revistas sobre el tema "Cobalto cyclam"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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1

Babic-Samardzija, K., Sofija Sovilj та V. M. Jovanovic. "Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands". Journal of the Serbian Chemical Society 68, № 12 (2003): 989–99. http://dx.doi.org/10.2298/jsc0312989b.

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The electrochemical properties of eight mixed-ligand cobalt(III) and co balt(II) complexes of the general formulas [CoIII(Rac)cyclam (ClO4)2 (1)?(4) and [Co2II(Rac)tpmc](ClO4)3 (5)?(8) were studied. The substances were investigated in aqueous NaClO4 solution and non-aqueous LiClO4/CH3CN solution by cyclic voltam metry at a glassy carbon electrode. In aqueous solution, cyclam and Rac ligands being soluble in water undergo anodic oxidation. Coordination to Co(III) in complexes 1?4, stabilizes these ligands but reversible peaks in catohodic region indicate the redox reaction CoIII/CoII ion. In th

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2

Boyd, Simon, Kenneth P. Ghiggino, and W. David McFadyen. "Photochemistry of Anthracene-Appended Cobalt(III) Cyclam Complexes." Australian Journal of Chemistry 61, no. 8 (2008): 585. http://dx.doi.org/10.1071/ch08189.

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The photochemistry of two anthracene-appended cobalt(iii) cyclam complexes is explored with a view to demonstrate a photoactivated ligand release process. The ligand exchange processes that occur in the complexes cis-[CoL(NO2)(ONO)]+ and trans-[CoL(NO2)(ONO)]+ in which L = 6-(anthracen-9-ylmethyl)-1,4,8,11-tetraazacyclotetradecane were monitored upon illumination of the anthracenyl chromophore at 360 nm in the presence of a large excess of thiocyanate. The trans-[CoL(NO2)(ONO)]+ complex underwent a ligand exchange reaction in the absence of light and displayed an enhancement of the reaction up

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3

Jovanovic, Vladislava, K. Babic-Samardzija, and Sofija Sovilj. "The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid." Journal of the Serbian Chemical Society 70, no. 1 (2005): 51–61. http://dx.doi.org/10.2298/jsc0501051j.

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Eight mixed-ligand cobalt(III) complexes with the macrocyclic amine 1,4,8,11-tetraazacyclotetradecane (cyclam) and a heterocyclic dithiocarbamate (Rdtc-)i.e., morpholine-(Morphdtc), thiomorpholine- (Timdtc), piperazine-(Pzdtc), N-methylpiperazine-(Mepzdtc), piperidine- (Pipdtc), 2-, 3- or 4-methylpiperidine-(2-, 3- and 4-Mepipdtc) carbodithionato-S,S ions, of the general formula [Co(cyclam)Rdtc](ClO4)2, were investigated in deoxygenated 0.1 MHClO4 solutions. Cyclic voltammetry data at a glassy carbon (GC) electrode demonstrate a redox reaction of cobalt(III) from the complexes at potentials st

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4

Tcho, Woon-Young, Bin Wang, Yong-Min Lee, Kyung-Bin Cho, Jason Shearer, and Wonwoo Nam. "A mononuclear nonheme cobalt(iii)–hydroperoxide complex with an amphoteric reactivity in electrophilic and nucleophilic oxidative reactions." Dalton Transactions 45, no. 37 (2016): 14511–15. http://dx.doi.org/10.1039/c6dt01194b.

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A mononuclear nonheme cobalt(iii)–hydroperoxide complex bearing a tetramethylated cyclam ligand, which is synthesized by the protonation of its corresponding cobalt(iii)–peroxide complex, exhibits an amphoteric reactivity in electrophilic and nucleophilic oxidative reactions.

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5

Marimuthu, Alexander, and Kannaiyan Pandian. "Electrochemical Detection of Hydrazine Using Cobalt Hexacynoferrate Deposited Carbon Sphere Modified Glassy Carbon Electrode." Advanced Materials Research 584 (October 2012): 324–28. http://dx.doi.org/10.4028/www.scientific.net/amr.584.324.

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Cobalt hexacynoferrate decorated carbon spheres (CoHCF@C) with few micron dimensions was synthesized by sequential deposition method in which the carbon sphere previously modified with cobalt ion exposed into potassium ferricyanide. The thickness of the CoHCF layer was restricted to five cycles. The formation of layer CoHCF was confirmed by FT-IR, XRD, HRSEM, EDX and cyclic voltammeter technique. The CoHCF decorated carbon sphere modified GCE was utilized as electron transfer mediator for electrocatalytic oxidation of hydrazine in phosphate buffer medium. The electrocatalytic behavior of modif

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6

Koshtyal, Yury, Ilya Mitrofanov, Denis Nazarov, et al. "Atomic Layer Deposition of Ni-Co-O Thin-Film Electrodes for Solid-State LIBs and the Influence of Chemical Composition on Overcapacity." Nanomaterials 11, no. 4 (2021): 907. http://dx.doi.org/10.3390/nano11040907.

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Nanostructured metal oxides (MOs) demonstrate good electrochemical properties and are regarded as promising anode materials for high-performance lithium-ion batteries (LIBs). The capacity of nickel-cobalt oxides-based materials is among the highest for binary transition metals oxide (TMOs). In the present paper, we report the investigation of Ni-Co-O (NCO) thin films obtained by atomic layer deposition (ALD) using nickel and cobalt metallocenes in a combination with oxygen plasma. The formation of NCO films with different ratios of Ni and Co was provided by ALD cycles leading to the formation

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7

Nakajima, Takeshi, Hiroyuki Hosokawa, and Koji Shimojima. "Influence of Cobalt Content on the Fatigue Strength of WC-Co Hardmetals." Materials Science Forum 534-536 (January 2007): 1201–4. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.1201.

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The behavior of hardmetals under cyclic loads is investigated. Unnotched specimens were employed to obtain practical information regarding fatigue in hardmetals. All the tested hardmetals exhibit an increase in the number of cycles until failure with a decrease in the maximum stress, i.e., the hardmetals exhibit a high fatigue sensitivity. The fatigue strength increases with the cobalt content. Although distinct fatigue limits, as observed in metals, cannot be observed, the calculated fatigue limit stress at 107 cycles is found to be approximately 70% of the flexural strength, and the stress v

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8

Vainoris, Modestas, Natalia Tsyntsaru, and Henrikas Cesiulis. "Modified Electrodeposited Cobalt Foam Coatings as Sensors for Detection of Free Chlorine in Water." Coatings 9, no. 5 (2019): 306. http://dx.doi.org/10.3390/coatings9050306.

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Metal foams offer a substantial specific surface area and sturdy frame, which makes them great candidates for various applications such as catalysts, sensors, heat sinks, etc. Cobalt and its various compounds are being considered as a cheaper alternative for precious and rare metal catalysts. The cobalt foams have been electrodeposited under galvanostatic and current pulse modes; the porous surface was created using a dynamic hydrogen bubble template. In order to obtain the highest porosity, four different solutions were tested, as well as a wide current density window (0.6–2.5 A/cm²), in addi

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9

Vuckovic, Gordana, V. Stanic, Sofija Sovilj, M. Antonijevic-Nikolic, and J. Mrozynski. "Cobalt(II) complexes with aromatic carboxylates and N-functionalized cyclam bearing 2-pyridylmethyl pendant arms." Journal of the Serbian Chemical Society 70, no. 8-9 (2005): 1121–29. http://dx.doi.org/10.2298/jsc0509121v.

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Novel binuclear Co(II) complexeswithN-functionalized cyclam N,N?,N",N???-tetrakis( 2-pyridylmethyl)tetraazacyclotetradecane (tpmc) and one of the aromatic monoor dicarboxylato ligands (benzoate, phthalate or isophthalate ions) were prepared. They were analyzed and studied by elemental analyses (C, H, N), electrical conductivities, VIS and IR spectroscopy andmagnetic as well as cyclic voltammetric measurements. In [Co2(C6H5COO)2tpmc]ClO4)2.3H2O, the benzoate ligands are most probably coordinated as chelates in the trans-position to each Co(II) and the macrocycle adopts a chair conformation. In

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10

Domenianni, Luis I., Reinhold Fligg, Annett Schäfermeier, et al. "Molecular and electronic structure of an azidocobalt(iii) complex derived from X-ray crystallography, linear spectroscopy and quantum chemical calculations." Physical Chemistry Chemical Physics 21, no. 36 (2019): 20393–402. http://dx.doi.org/10.1039/c9cp04350k.

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X-ray diffraction, UV/Vis electronic spectroscopy and Fourier-transform infrared spectroscopy are used with DFT and CAS calculations to explore the molecular and electronic structure of the cationic complex (cyclam)(diazido)cobalt(iii).

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11

Luo, Gang, Shi Chao Zhang, and Hua Fang. "Facile Synthesis of New Nanocomposite Based on Cobalt Oxide and Carbon Nanotubes with Excellent Electrochemical Capacitive Behavior." Advanced Materials Research 399-401 (November 2011): 1451–56. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.1451.

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A new two-step synthesis of composite electrode based on carbon nanotubes (CNTs) and cobalt oxide (Co3O4) by electrophoretic deposition of CNTs on Ni foam followed by electrodeposition of cobalt hydroxide on CNTs electrode and heat treatment to form Co3O4/CNTs composite electrode was developed. The structure and morphology of the electrodes were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Their electrochemical performances were evaluated by cyclic voltammetry (CV), galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS). Experimental

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12

Ahmad, Jamil, Florence Bothata-Nareetsile, and Clifford AL Becker. "Cyclic voltammetric studies of tris(alkylisocyanide)bis (triarylphosphine)cobalt(II) and tris(alkylisocyanide) bis(triarylphosphine)cobalt(I) complexes exhibiting synthetic interconvertability." Canadian Journal of Chemistry 81, no. 9 (2003): 982–87. http://dx.doi.org/10.1139/v03-100.

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Nine pairs of corresponding [CoI(CNR)3(PR'3)2]X, [CoII(CNR)3(PR'3)2]X2 complexes where X = ClO4, BF4; CNR = CNCMe3, CNCHMe2, CNC6H11, CNCH2Ph; PR'3 = PPh3, P(C6H4Me-p)3, P(C6H4OMe-p)3 have been studied using cyclic voltammetry in CH3CN solutions. All cycles are reversible, and E1/2 for the Co(I) complexes, initially oxidized, are within experimental error identical to E1/2 values for the corresponding Co(II) complexes, initially reduced. E1/2 values are strongly dependent on the triarylphosphine ligand, decreasing in the order PPh3 > > P(C6H4Me-p)3 > P(C6H4OMe-p)3, and weakly depe

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13

Kahri, H., V. Flaud, R. Touati, P. Miele, and U. B. Demirci. "Reaction intermediate/product-induced segregation in cobalt–copper as the catalyst for hydrogen generation from the hydrolysis of sodium borohydride." RSC Advances 6, no. 104 (2016): 102498–503. http://dx.doi.org/10.1039/c6ra22998k.

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14

Ohba, Shigeru, Naoki Yamada, and Makoto Eishima. "trans-Dinitro(1,4,8,11-tetraazacyclotetradecane-N,N′,N′′,N′′′)cobalt(III) perchlorate." Acta Crystallographica Section E Structure Reports Online 57, no. 1 (2000): m12—m13. http://dx.doi.org/10.1107/s1600536800018778.

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In the title compound,trans-[Co(NO2)2(cyclam)]ClO4, (I), where cyclam is 1,4,8,11-tetraazacyclotetradecane (C10H24N4), the CoIIIcomplex has a distorted octahedral coordination. The O atoms of each nitro ligand are disordered over two sites with 65:35% occupancy.

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15

Hiranoi, Yo, and Koji Nakano. "Copolymerization of epoxides with cyclic anhydrides catalyzed by dinuclear cobalt complexes." Beilstein Journal of Organic Chemistry 14 (November 5, 2018): 2779–88. http://dx.doi.org/10.3762/bjoc.14.255.

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The alternating copolymerization of epoxides with cyclic anhydrides (CAs) is a highly diverse synthetic method for polyesters as the polymers’ architectures and properties can be easily controlled depending on the combination of two monomers. Thus, a variety of catalyst designs has been reported to prepare the desired copolymers efficiently. We herein report dinuclear cobalt–salen complexes with a benzene ring as a linker and their activities in copolymerization reactions. The dinuclear cobalt complexes showed a higher catalytic activity for the copolymerization of propylene oxide with phthali

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16

Chansaengsri, Kasidid, Korakot Onlaor, Thutiyaporn Thiwawong, and Benchapol Tunhoo. "Supercapacitive Properties of Cobalt Oxide Thin Films Prepared by Electrostatic Spray Deposition Technique at Different Substrate Temperature." Key Engineering Materials 675-676 (January 2016): 261–64. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.261.

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In this work, cobalt oxide thin films were prepared by electrostatic spray deposition (ESD) technique. The influence of the substrate temperatures on properties of film was investigated. Phase transformation of cobalt oxide thin films due to the effect of different substrate temperature was also observed. Cyclic voltammetry was used to measure the performance of cobalt oxide supercapacitor. At higher substrate temperature, the cobalt oxide thin films exhibit the high specific capacitance due to the effect of phase transformation in cobalt oxide films.

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17

Bolagam, Ravi, and Sukkee Um. "Hydrothermal Synthesis of Cobalt Ruthenium Sulfides as Promising Pseudocapacitor Electrode Materials." Coatings 10, no. 3 (2020): 200. http://dx.doi.org/10.3390/coatings10030200.

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In this paper, we report the successful synthesis of cobalt ruthenium sulfides by a facile hydrothermal method. The structural aspects of the as-prepared cobalt ruthenium sulfides were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. All the prepared materials exhibited nanocrystal morphology. The electrochemical performance of the ternary metal sulfides was investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy techniques. Noticeably, the optimized ternary metal sulfide electrode

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18

Kurczewska, Joanna, Grzegorz Schroeder, and Urszula Narkiewicz. "Copper removal by carbon nanomaterials bearing cyclam-functionalized silica." Open Chemistry 8, no. 2 (2010): 341–46. http://dx.doi.org/10.2478/s11532-009-0131-y.

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AbstractThe synthesis of metal (Fe, Co, Ni)-encapsulated carbon nanomaterials coated with cyclam-bonded silica has been described. The organic layer was identified by Fourier transform infrared spectroscopy and elemental analysis. The functionalized magnetic nanomaterials were employed to extract the divalent cations: copper, calcium, cobalt, manganese and nickel from aqueous solutions. Their adsorption capacities were studied by the batch procedure. The concentration of cations extracted was determined by inductively coupled plasma mass spectrometry. Influence of different parameters viz. pH,

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19

Babic-Samardzija, K., V. M. Jovanovic, and S. P. Sovilj. "Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes." Journal of the Serbian Chemical Society 73, no. 7 (2008): 761–70. http://dx.doi.org/10.2298/jsc0807761b.

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Four mixed-ligand cobalt(III) complexes (1-4) of the general formula [Co(Rdtc)cyclam](ClO4)2 and [Co(Rac)cyclam](ClO4)2 (cyclam = 1,4,8,11-tetra- azacyclotetradecane; Rdtc = thiomorpholine-(Timdtc) or 2-methylpiperidine-(2-Mepipdtc) dithiocarbamates; Rac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionato (Hfac) or 2,2,6,6-tetramethyl-3,5-heptanedionato (Tmhd), respectively) were electrochemically examined on a glassy carbon and an iron electrode in perchloric acid solution. The obtained results showed the influence of these complexes on hydrogen evolution, the oxygen reduction reaction and iron disso

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20

Klawitter, Jerome J., Jason Patton, Robert More, Noel Peter, Evgeny Podnos, and Mark Ross. "In vitro comparison of wear characteristics of PyroCarbon and metal on bone: Shoulder hemiarthroplasty." Shoulder & Elbow 12, no. 1_suppl (2018): 11–22. http://dx.doi.org/10.1177/1758573218796837.

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Background There are concerns regarding glenoid erosion with metal shoulder hemiarthroplasty. PyroCarbon may offer an alternative because of favorable wear characteristics and preservation of the glenoid. The purpose of this study was to assess in vitro bone wear characteristics of PyroCarbon relative to cobalt chromium alloy hemiarthroplasty in a shoulder wear simulator. Methods Wear of PyroCarbon and cobalt chromium prostheses articulating with bone were characterized by means of bone wear penetration rate, changes to surface roughness, and wear particle analysis. Results PyroCarbon prosthes

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21

Funston, A. M., W. D. McFadyen, and P. A. Tregloan. "The Synthesis and Crystal Structures of Two Cobalt(III) Complexes Containing the Ligand 1,4,8,11-Tetraazacyclotetradecane." Australian Journal of Chemistry 55, no. 8 (2002): 535. http://dx.doi.org/10.1071/ch02015.

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The new cobalt(III) complex [Co(cyclam)(NO3)2]NO3�HNO3 (2) has been synthesized. The crystal structure of this complex and the related complex [Co(cyclam)(NH3)2]Cl2BF4�2H2O (1) have been determined. Crystal data for (1): M 451.04, monoclinic, space group P21/c (No. 14), a 7.3927(10), b 13.3082(7), c 19.524(2) Å, β 97.625(14)�, V 1903.9(3) Å3, F(000) 936, Z 4, Dc 1.574 g cm–3, μ 1.225 cm–1, Mo Kα (graphite monochromatized) λ 0.71073 Å, T 293(1) K. Crystal data for (2): M 571.33, triclinic, space group P1–(No. 2),a 7.3988(14), b 8.5682(16), c�9.209(3) Å, α 89.02(2), β 76.64(3), γ 82.340(16)�, V

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22

Wang, Hong Juan, Dong Zhou, Feng Peng, and Hao Yu. "Facile Synthesis and Performance of Reduced Graphene Oxide/Cobalt Oxide Composite for Supercapacitor." Advanced Materials Research 785-786 (September 2013): 779–82. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.779.

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A series of reduced graphene oxide/cobalt oxide composites (Co3O4/rGO)were fabricated via a chemical precipitation approach and subsequent calcination in Ar atmosphere. Experimental results show that Co3O4/rGO composite with 86 wt% of Co3O4 loading exhibits the optimum specific capacitance of 240 F g-1 in 6.0 M KOH electrolyte at the current density of 0.8 A g-1, excellent quick charge-discharge performance and outstanding cyclic stability with 2.3% of its specific capacitance increase after 2400 cycles at the current density of 8 A g-1 in GCD test, exhibiting significant potential of Co3O4 /r

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23

Hammud, Hassan H., Nusaybah Alotaibi, Nasreen Al Otaibi, et al. "Hierarchical Porous Carbon Cobalt Nanocomposites-Based Sensor for Fructose." Chemosensors 9, no. 1 (2020): 6. http://dx.doi.org/10.3390/chemosensors9010006.

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3D hierarchical graphitic carbon nanowalls encapsulating cobalt nanoparticles HPC-Co were prepared in high yield from solid-state pyrolysis of cobalt 2,2′-bipyridine chloride complex. Annealing of HPC-Co in air gave HPC-CoO, which consists of a mixture of crystallite Co3O4 nanospheres and nanorods bursting out of mesoporous carbon. Both nanocomposites were fully characterized using SEM, TEM, BET, and powder X-ray diffraction. The elemental composition of both nanocomposites examined using SEM elemental mapping and TEM elemental mapping supports the successful doping of nitrogen. The powder X-r

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24

Banziger, Susannah D., Matthias Zeller, and Tong Ren. "New Synthetic Route for Cobalt(III) Dissymmetric Bisalkynyl Complexes Based on Cobalt(III)(cyclam)(C2 NAPMes )." European Journal of Inorganic Chemistry 2019, no. 44 (2019): 4766–72. http://dx.doi.org/10.1002/ejic.201901070.

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25

Ahmad, Athirah, Koay Mei Hyie, N. R. Nik Roselina, Firdaus Munir, Choong Soo Li, and Sheridan Saidin. "Electrical Properties and Morphology of Electrodeposited Cobalt-Nickel-Iron on Flexible Printed Circuits." Advanced Materials Research 1113 (July 2015): 545–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.545.

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Electrodeposition is a method to electrochemically deposit alloy on various types of metal. This method has ability to produce protective coating and thin films on the metal. In this research, one of the electrodeposition methods, Cyclic Voltammetry (CV) with 10 and 20 cycles was applied to deposit Cobalt-Nickel-Iron (Co-Ni-Fe) on Electroless Nickel Immersion Gold (ENIG) Flexible Printed Circuits (FPCs). The main purpose of this paper is to investigate the electrical properties, morphology and crystallographic structure of the electrodeposited coating. Curve Trace test was conducted to identif

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26

Karve, Manjusha, and Jayram V. Gholave. "Solid-Phase Extraction and Atomic Absorption Spectrometric Determination of Cobalt Using an Octadecyl Bonded Silica Membrane Disk Modified with Cyanex 272." Journal of AOAC INTERNATIONAL 94, no. 2 (2011): 627–33. http://dx.doi.org/10.1093/jaoac/94.2.627.

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Abstract A simple SPE method for determination of cobalt(II) using a C18 bonded silica membrane disk impregnated with Cyanex 272 has been developed. Cobalt(II) was quantitatively sorbed at pH 6.0 from a sample solution and eluted using 10.0 mL 1.0 M HNO3 prior to its flame atomic absorption spectrometric determination. The influence of eluting agents, the minimum volume and maximum flow rate of the eluent, and interfering ions on cobalt(II) was studied. The method developed for cobalt(II) had an LOD of 1.4 g/L, and a preconcentration factor &gt;200 with an RSD of 0.6. The reusability of th

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27

Siri, O., A. Tabard, P. Pullumbi, and R. Guilard. "Cobalt complex based on cyclam for reversible binding of nitric oxide." Molecular Simulation 34, no. 10-15 (2008): 909–21. http://dx.doi.org/10.1080/08927020802235680.

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28

Kong, Linglong, Lu Wang, Deye Sun, et al. "Aggregation-Morphology-Dependent Electrochemical Performance of Co3O4 Anode Materials for Lithium-Ion Batteries." Molecules 24, no. 17 (2019): 3149. http://dx.doi.org/10.3390/molecules24173149.

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The aggregation morphology of anode materials plays a vital role in achieving high performance lithium-ion batteries. Herein, Co3O4 anode materials with different aggregation morphologies were successfully prepared by modulating the morphology of precursors with different cobalt sources by the mild coprecipitation method. The fabricated Co3O4 can be flower-like, spherical, irregular, and urchin-like. Detailed investigation on the electrochemical performance demonstrated that flower-like Co3O4 consisting of nanorods exhibited superior performance. The reversible capacity maintained 910.7 mAh·g−

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29

Untalasco, John Lemuel G., Abdul Rahman Mariscal, and Menandro C. Marquez. "Morphology Induced Effect on the Electrochemical Activity of Cobaltous Oxide Nanostructures in Potassium Hydroxide and Phosphoric Acid Media." Materials Science Forum 916 (March 2018): 96–100. http://dx.doi.org/10.4028/www.scientific.net/msf.916.96.

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The morphology of cobalt oxide / cobaltous oxide (Co3O4) nanostructures was controlled using different seed layer concentrations and deposition time. Co3O4nanostructures were deposited on ITO glass synthesized using two step solution route. The morphological evolution of the Co3O4nanostructures has been investigated using scanning electron microscopy (SEM). This has been correlated to the electrochemical activity of the material using cyclic voltammetry (CV) in a potassium hydroxide (KOH) and phosphoric acid (H3PO4) media. Other characterization technique such as x-ray diffraction analysis (XR

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30

Ferretti, Francesco, Florian Korbinian Scharnagl, Anna Dall'Anese, Ralf Jackstell, Sarim Dastgir, and Matthias Beller. "Additive-free cobalt-catalysed hydrogenation of carbonates to methanol and alcohols." Catalysis Science & Technology 9, no. 13 (2019): 3548–53. http://dx.doi.org/10.1039/c9cy00951e.

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Iqbal, Javed, Arshid Numan, Mohammad Omaish Ansari, et al. "Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery." Polymers 12, no. 12 (2020): 2816. http://dx.doi.org/10.3390/polym12122816.

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In this study, silver (Ag) and cobalt oxide (Co3O4) decorated polyaniline (PANI) fibers were prepared by the combination of in-situ aniline oxidative polymerization and the hydrothermal methodology. The morphology of the prepared Ag/Co3O4@PANI ternary nanocomposite was studied by scanning electron microscopy and transmission electron microscopy, while the structural studies were carried out by X-ray diffraction and X-ray photoelectron spectroscopy. The morphological characterization revealed fibrous shaped PANI, coated with Ag and Co3O4 nanograins, while the structural studies revealed high pu

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32

Wen, Hao, Changdong Shi, Yuanrui Gao, et al. "2D Coordination Polymer Derived Co3O4Nanocrystals as High Performance Anode Material of Lithium-Ion Batteries." Nano 13, no. 12 (2018): 1850139. http://dx.doi.org/10.1142/s1793292018501394.

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Co3O4 nanocrystals have been synthesized via an ordinary one-step calcination of a cobalt-based 2D coordination polymer [Co(tfbdc)(4,4[Formula: see text]-bpy)(H2O)2]. As an anode material for lithium-ion batteries, the obtained Co3O4 nanocrystals exhibit high reversible capacity, excellent cyclic stability and better rate capability. The reversible capacity of the Co3O4 nanocrystals maintains 713[Formula: see text]mA[Formula: see text]h[Formula: see text]g[Formula: see text] after 50 cycles at a current density of 50[Formula: see text]mA[Formula: see text]g[Formula: see text]. Our results conf

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33

Khandar, Ali Akbar, Kristin Kirschbaum, Marjan Abedi, et al. "Synthesis, characterization and crystal structures of mono and dinuclear macrocyclic cobalt(ii) complexes with a new tetraaza m-xylyl-based macrocyclic ligand." New Journal of Chemistry 39, no. 4 (2015): 2822–31. http://dx.doi.org/10.1039/c4nj01608d.

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34

O'Neill, E. S., J. L. Kolanowski, G. H. Yin, et al. "Reversible magnetogenic cobalt complexes." RSC Advances 6, no. 36 (2016): 30021–27. http://dx.doi.org/10.1039/c6ra04643f.

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35

Passos, Aline Ribeiro, Camille La Fontaine, Leandro Martins, Sandra Helena Pulcinelli, Celso Valentim Santilli, and Valérie Briois. "Operando XAS/Raman/MS monitoring of ethanol steam reforming reaction–regeneration cycles." Catalysis Science & Technology 8, no. 24 (2018): 6297–301. http://dx.doi.org/10.1039/c8cy01596a.

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36

Lee, Chuan-Pei, Bayu-Tri Murti, Po-Kang Yang, Francesca Rossi, Carlo Carraro, and Roya Maboudian. "Cobalt Oxide-Decorated Silicon Carbide Nano-Tree Array Electrode for Micro-Supercapacitor Application." Materials 14, no. 16 (2021): 4514. http://dx.doi.org/10.3390/ma14164514.

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A cobalt oxide (Co3O4)-decorated silicon carbide (SiC) nano-tree array (denoted as Co3O4/SiC NTA) electrode is synthesized, and it is investigated for use in micro-supercapacitor applications. Firstly, the well-standing SiC nanowires (NWs) are prepared by nickel (Ni)-catalyzed chemical vapor deposition (CVD) method, and then the thin layer of Co3O4 and the hierarchical Co3O4 nano-flower-clusters are, respectively, fabricated on the side-walls and the top side of the SiC NWs via electrodeposition. The deposition of Co3O4 on the SiC NWs benefits the charge transfer at the electrode/aqueous elect

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37

Ren, Wang, Ying Zhang, and Min Jiao Li. "Electrodeposition of Cobalt Nanoparticles from Mixture of 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid and Urea." Applied Mechanics and Materials 117-119 (October 2011): 773–76. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.773.

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The electrodeposition of cobalt nanoparticles from mixture of 1-butyl-3- methylimidazolium chloride (BMIC) ionic liquid and urea was investigated. The results from the cyclic voltammetry (CV) show that the reduction of Co(II) to cobalt is an irreversible process and controlled by the diffusion of Co(II) on Pt working electrode. The cobalt nanoparticles prepared by direct current (DC) electrodeposition method at 70 °C were characterized by scanning electron microscope (SEM). Test results indicate that the Co nanoparticles are grain-like arrays and link together because of their magnetic propert

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38

SAKAMOTO, KEIICHI, and EIKO OHNO-OKUMURA. "Synthesis of Octasubstituted Cobalt Phthalocyanines and Their Redox Properties." Journal of Porphyrins and Phthalocyanines 03, no. 07 (1999): 634–42. http://dx.doi.org/10.1002/(sici)1099-1409(199908/10)3:6/7<634::aid-jpp186>3.0.co;2-w.

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Octakis(alkoxymethyl) cobalt phthalocyanines with relatively short side chains were synthesized which exhibited no thermotropic liquid crystalline behaviour. The final products as well as the intermediates have been characterized by proton magnetic resonance, infrared and electron spectra and elemental analysis. Cyclic voltammograms were measured for octakis(alkoxymethyl) cobalt phthalocyanines in order to examine their electron transfer properties. The electron transfer properties of octakis (alkoxymethyl) cobalt phthalocyanines depend on the kind and number of substituents and are due to the

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39

MAHSHID, S. S., and A. DOLATI. "A STUDY ON THE ELECTRODEPOSITION MECHANISM OF COBALT-NICKEL/COPPER MULTILAYER FROM SULFATE SOLUTION." International Journal of Modern Physics B 22, no. 18n19 (2008): 3046–59. http://dx.doi.org/10.1142/s0217979208047912.

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The cobalt-nickel/copper multilayer films were prepared by electrodeposition process in sulfate solution using a three electrode cell. Cyclic voltammetry and double chronoampermetry techniques were utilized to characterize the multilayer system and to obtain the nucleation and growth mechanism. The cyclic voltammograms determined the reduction potential range of the three components and also clearly emphasized that electrodeposition of cobalt-nickel alloy was controlled by a kinetic process, while copper ions were reduced with diffusion-controlled mechanism. These results were confirmed with t

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40

Oba, Yukiko, and Tomoyuki Mochida. "Thermal properties and crystal structures of cobalt(III)–cyclam complexes with the bis(trifluoromethanesulfonyl)amide anion (cyclam = 1,4,8,11-tetraazacyclotetradecane)." Polyhedron 99 (October 2015): 275–79. http://dx.doi.org/10.1016/j.poly.2015.08.015.

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41

Mohamed, Tarek, Osama Abdulmoneam Baraka, and Magdy Mostafa Badawy. "Comparison between Acetal Resin and Cobalt-Chromium Removable Partial Denture Clasp Retention: An in vitro Study." International Journal of Prosthodontics and Restorative Dentistry 3, no. 2 (2013): 50–56. http://dx.doi.org/10.5005/jp-journals-10019-1076.

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ABSTRACT Statement of problem The retention qualities of acetal resin clasps are questionable. Purpose To asses the initial retention and after cycling for 1,200 cycles of acetal resin clasps as compared to cobalt-chromium clasps. Materials and methods Extracted maxillary first premolars and molars were collected. Each tooth was embedded in acrylic block up to the cementoenamel junction. On each block, partial denture model consisted of Akers clasp, minor connector, cobalt-chromium horizontal plate representing the denture base, and a vertical arm on the horizontal plate was constructed. Model

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42

Vuckovic, Gordana, Sladjana Tanaskovic, Mirjana Antonijevic-Nikolic, Vukosava Zivkovic-Radovanovic, and Gordana Gojgic-Cvijovic. "A study of novel cobalt(II) octaazamacrocyclic complexes with aminocarboxylates or their derivatives." Journal of the Serbian Chemical Society 74, no. 6 (2009): 629–40. http://dx.doi.org/10.2298/jsc0906629v.

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Four new air-stable mixed-ligand Co(II) complexes having the general formula [Co2(Y)tpmc]Z3?q(H2O/CH3CN) (HY = N-methylglycine/N,N-dimethylglycine, Z = - 4BF , qH2O=4 or 3; HY=S-norvaline/S-valine Z=-ClO4 , qCH3CN = 0.5; qH2O = 0.5; tpmc = N,N',N'',N'''-tetrakis(2-pyridylmethyl)- -1,4,8,11-tetraazacyclotetradecane) were prepared. The composition, some physical and chemical properties and their tentative geometries were evaluated based on elemental analysis (C, H, N), conductometric and magnetic measurements, spectroscopic data (UV/Vis, IR) and cyclic voltammetry. The data were compared with ea

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43

Kravchenko, A. A., D. I. Dyachenko, and V. T. Fomichev. "Mediated Electrosynthesis of Cobalt Nanoparticles from Ionic Liquids." Solid State Phenomena 265 (September 2017): 679–83. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.679.

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The electrochemical behavior of cobalt in the presence of methylviologen (MV2+) dichloride was investigated in choline chloride-urea (1:2 molar ratio) deep eutectic solvent containing 1 mM CoSO4 and 1 mM MV2+. Cyclic voltammetry of cobalt electrolyte after reduction process at stationary potential has shown the shift of oxidation peak to cathodic region with increase of reduction process time. The investigations carried out after electrolysis of the system containing 1 mM CoSO4 and 1 mM MV2+ at the reduction peak of methylviologen dichloride have shown that there was an accumulation of cobalt

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44

Kang, Jinhyeon, and Sanggyu Yim. "Enhanced cycle stability of a NiCo 2 S 4 nanostructured electrode for supercapacitors fabricated by the alternate-dip-coating method." Royal Society Open Science 5, no. 8 (2018): 180506. http://dx.doi.org/10.1098/rsos.180506.

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Nanostructured nickel cobalt sulfide (NiCo 2 S 4 ) electrodes are successfully fabricated using a simple alternate-dip-coating method. The process involves dipping a TiO 2 nanoparticles-covered substrate in a nickel/cobalt precursor solution and sulfur precursor solution alternately at room temperature. The fabricated bimetallic sulfide electrode exhibits a synergetic improvement compensating for the disadvantages of the two single metal sulfide electrodes, i.e. the poor cycle stability of the nickel sulfide electrode and the low specific capacitance ( C sp ) of the cobalt sulfide electrode. T

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45

Mondal, Kartik Chandra, Prinson P. Samuel, Herbert W. Roesky, et al. "Stabilization of a Cobalt–Cobalt Bond by Two Cyclic Alkyl Amino Carbenes." Journal of the American Chemical Society 136, no. 5 (2014): 1770–73. http://dx.doi.org/10.1021/ja4123285.

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46

Koca, Atıf, Hatice A. Dinçer, Ergün Gonca, and Ahmet Gül. "Voltammetric and spectroelectrochemical characterization and electrocatalytic application of metallophthalocyanines carrying pendant bulky units." Journal of Porphyrins and Phthalocyanines 13, no. 06 (2009): 669–80. http://dx.doi.org/10.1142/s1088424609000929.

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In this work, voltammetric, spectroelectrochemical, and electrocatalytic properties of the metallophthalocyanines bearing four chloro and four biphenyl-malonic ester bulky groups were investigated. Voltammetric and spectroelectrochemical measurements of the metallophthalocyanines show that while cobalt phthalocyanine presents both metal-based and ring-based redox processes, all other complexes give only ring-based reduction and oxidation processes. The redox processes have generally diffusion-controlled, reversible and one-electron transferred mechanisms. Cobalt phthalocyanine electrocoated ea

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47

Montes-Rojas, A., and A. L. Donjuan-Medrano. "A Study of the Initial Stages of Co Deposition on a Silver Electrode in Ammonia Medium Using an Electrochemical Quartz Crystal Microbalance." ISRN Electrochemistry 2013 (January 31, 2013): 1–10. http://dx.doi.org/10.1155/2013/624163.

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The early stages of Co deposition on a silver electrode in ammonia medium were studied using cyclic voltammetry and chronoamperometry coupled with quartz crystal microbalance (EQCM) in ammonia solution. The results obtained by means of EQCM showed that during the initial stages of cobalt deposition a monolayer is formed on the substrate both in the underpotential and overpotential region, and this monolayer is formed at −600 mV and −980 mV. Once the cobalt deposition process starts, the growth is very fast making the investigation of the initial stages rather difficult. During this process, co

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48

Blahut, Jan, Ladislav Benda, Jan Kotek, Guido Pintacuda, and Petr Hermann. "Paramagnetic Cobalt(II) Complexes with Cyclam Derivatives: Toward 19F MRI Contrast Agents." Inorganic Chemistry 59, no. 14 (2020): 10071–82. http://dx.doi.org/10.1021/acs.inorgchem.0c01216.

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49

Ouyang, Jiangbo, та Fred C. Anson. "An electrochemical study of the μ-peroxo complex of cobalt(III) cyclam". Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 271, № 1-2 (1989): 331–38. http://dx.doi.org/10.1016/0022-0728(89)80087-7.

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50

Ma, Ling, Bo-Yan Zhang, Hu-Lin Li, and James Q. Chambers. "Kinetics of nitrate reduction by cobalt-cyclam incorporated Nafion® redox polymer." Journal of Electroanalytical Chemistry 362, no. 1-2 (1993): 201–5. http://dx.doi.org/10.1016/0022-0728(93)80022-a.

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