scholarly journals Cyclic Voltammogram Analysis of the Environmental Aspects of the Use of Ferrocenyl Carbinols

2021 ◽  
Author(s):  
ahmad alkhawaldeh
Keyword(s):  
Elemental Analysis ◽  
New Product ◽  
Cyclic Voltammograms ◽  
Cyclic Voltammogram ◽  
Acidic Environment ◽  
Spatial Structures ◽  
Environmental Aspects ◽  
Cyclic Ketones ◽  
Electrophilic Reactions

Ferrocene and its derivatives have ecologically effective antidetane properties. In this regard, ferrocene reacts with cyclic ketones and ferrosenylcarbinols are synthesized. It should be noted that ferrocene enters into electrophilic reactions and the process takes place in an acidic environment. In addition, the yield of the new product was small compared to the reactions of ferrocene with non-cyclic ketones. This is due to the spatial structures of molecules. The elemental analysis of obtained compounds was carried out; the structures were researched by cyclic voltammograms and Chronoamperometric.

scholarly journals Electrochemical Study on MgO as an Additive in Molten Li2CO3-Na2CO3 for Molten Carbonate Fuel Cells

2021 ◽  
Author(s):  
Chan Mi Kim ◽  
In Ui Kim ◽  
S. P. Yoon ◽  
Sung Ki Cho
Keyword(s):  
Diffusion Coefficient ◽  
Fuel Cells ◽  
Electrochemical Impedance ◽  
Oxygen Solubility ◽  
Cyclic Voltammograms ◽  
Cyclic Voltammogram ◽  
Molten Carbonate ◽  
High Concentration ◽  
Electrochemical Response ◽  
Molten Carbonate Fuel Cells

Abstract This study investigates the effect of MgO as an additive in molten Li2CO3-Na2CO3 electrolyte for molten carbonate fuel cells through electrochemical analyses. Addition of MgO (1~5 mol%) increased the electrochemical response in cyclic voltammogram of peroxide in molten Li2CO3-Na2CO3. The diffusion coefficient of peroxide in molten Li2CO3-Na2CO3 containing MgO was determined via the comparison between the peak currents of cyclic voltammograms from microwire electrode and macrowire electrode. The addition of MgO did not impact the diffusion coefficient, indicating that the increase in the electrochemical response with the addition of MgO might be attributed to the increase in the peroxide concentration. The change in peroxide concentration was also confirmed by electrochemical impedance analyses, which exhibited a decrease in the exchange current density. The increase in the concentration of peroxide with the addition of MgO might be associated with the high thermal decomposition constant of MgCO3, implying the high concentration of oxide ion in the molten Li2CO3-Na2CO3. This study suggests that MgO might be an effective additive for increasing the oxygen solubility in the molten Li2CO3-Na2CO3, and subsequently for enhancing the performance of molten carbonate fuel cells.

An Effect of Bismuth Ion on the Reduction of Terbium Ion in Molten LiCl-KCl Eutectic Salt

2018 ◽  
Author(s):  
Beom Kyu Kim ◽  
Byung Gi Park ◽  
Hwa Jeong Han ◽  
Ji Hye Park ◽  
Won Ki Kim
Keyword(s):  
Intermetallic Compound ◽  
Electrochemical Techniques ◽  
Reduction Process ◽  
Open Circuit ◽  
Cyclic Voltammograms ◽  
Reduction Peak ◽  
Cyclic Voltammogram ◽  
Square Wave ◽  
Co Reduction ◽  
Salt Waste

A salt waste generated from the pyroprocess contains residual actinides and needs to be purified for recycling of the salt and waste conditioning. A co-reduction process could be considered for removal of residual actinides from the salt waste, which contains lanthanides and residual actinides. In the study, specifically, an effect of Bi(III) ion on the electrochemical reaction of Tb(III) ion was investigated in the molten LiCl-KCl eutectic with BiCl3 and TbCl3 at 773 K using electrochemical techniques of cyclic voltammetry, square wave voltammetry and open circuit chronopotentiometry. Tb(III) has a single redox couple without Bi(III). However, the cyclic voltammograms obtained at tungsten electrode in LiCl-KCl-BiCl3-TbCl3 showed four redox couples. The square wave voltammogram in same condition also showed five reduction peaks. Cyclic voltammogram and square wave voltammogram was resolved to find the accurate peaks for redox reaction. Each peak indicates the formation of Tb-Bi intermetallic compound except Tb(III) reduction peak. From the phase diagram of Tb-Bi, it is inferred that each peak corresponds to TbBi2, TbBi, Tb4Bi3, and Tb5Bi3. The open circuit chronopotentiometry was conducted to estimate Gibbs free energy of formation of Tb-Bi intermetallic compound. The experimental results obtained from three kind of the electrochemical techniques showed that Tb-Bi intermetallic compounds were electrochemically formed under potential of Tb(III) reduction potential by co-reduction of Bi(III) and Tb(III). These results indicate that underpotential deposition by co-reduction could be used for Tb(III) removal from the salt waste with Bi(III).

Synthesis, Structure and Electrochemical Behavior of a Supramolecular Compound

2009 ◽  
Vol 79-82 ◽  
pp. 1475-1478
Author(s):  
Zhi Feng Lin ◽  
Shu Fang Zhang ◽  
Dun Zhang
Keyword(s):  
Infrared Spectra ◽  
Elemental Analysis ◽  
Electrochemical Behavior ◽  
Reduction Reaction ◽  
Aqueous Environment ◽  
Cyclic Voltammograms ◽  
Supramolecular Compound ◽  
Uv Spectrum ◽  
Vibration Absorption ◽  
Stretching Vibration

A supramolecular compound, Co(C5H4NCOO)2(H2O)2∙2H2O was hydrothermally synthesized and characterized by elemental analysis, infrared spectra, UV-vis spectra. Elemental analysis result shows that the mass percent of C is 38.36%; H, 4.32% and N, 7.50%. Infrared spectra show that the main absorption peak is near 3396 cm-1, which is attributed to the O-H stretching vibration absorption. Also there are some absorption peaks at 1599, 1551, 1420, 1384 cm-1, which are attributed to the pyridine vibration absorption. UV spectrum for the compound shows strong absorption peaks at 203 and 259 nm, which are similar to isoniazid. X-ray diffraction data indicate that the compound is monoclinic, P21 / c space group. The cyclic voltammograms indicate that the compound decreases the rate of oxygen reduction reaction (ORR) and induces the ORR more difficult in aqueous solutions. The electrochemical behavior suggests that the compound possesses the potential application for corrosion in aqueous environment.

scholarly journals Synthesis and Photophysical and Electrochemical Properties of Functionalized Mono-, Bis-, and Trisanthracenyl Bridged Ru(II) Bis(2,2′:6′,2″-terpyridine) Charge Transfer Complexes

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Adewale O. Adeloye ◽  
Peter A. Ajibade
Keyword(s):  
Charge Transfer ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Electrochemical Techniques ◽  
Visible Region ◽  
Charge Transfer Complexes ◽  
Cyclic Voltammograms ◽  
Butenoic Acid ◽  
Ft Ir ◽  
C Nmr

With the aim of developing new molecular devices having long-range electron transfer in artificial systems and as photosensitizers, a series of homoleptic ruthenium(II) bisterpyridine complexes bearing one to three anthracenyl units sandwiched between terpyridine and 2-methyl-2-butenoic acid group are synthesized and characterized. The complexes formulated as bis-4′-(9-monoanthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT1), bis-4′-(9-dianthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT2), and bis-4′-(9-trianthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT3) were characterized by elemental analysis, FT-IR, UV-Vis, photoluminescence,1H and13C NMR spectroscopy, and electrochemical techniques by elemental analysis, FT-IR, UV-Vis, photoluminescence,1H and13C NMR spectroscopy, and electrochemical techniques. The cyclic voltammograms (CVs) of (RBT1), (RBT2), and (RBT3) display reversible one-electron oxidation processes atE1/2= 1.13 V, 0.71 V, and 0.99 V, respectively (versus Ag/AgCl). Based on a general linear correlation between increase in the length ofπ-conjugation bond and the molar extinction coefficients, the Ru(II) bisterpyridyl complexes show characteristic broad and intense metal-to-ligand charge transfer (MLCT) band absorption transitions between 480–600 nm,ε=9.45×103 M−1 cm−1, and appreciable photoluminescence spanning the visible region.

scholarly journals SYNTHESIS AND BIOLOGICAL ACTIVITIES EVALUATION OF SOME NEW SPIRO 1,2,4-TRIAZOLE DERIVATIVES HAVING SULFONAMIDE MOIETY

2015 ◽  
Vol 23 (23) ◽  
pp. 49-59
Author(s):  
Hany M. Dalloul ◽  
Khaled El-nwairy ◽  
Ali Z. Shorafa ◽  
Ahmed Abu Samaha
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Sulfonic Acid ◽  
Spectroscopic Data ◽  
Biological Activities ◽  
Cyclic Ketones ◽  
Triazole Derivatives ◽  
Toluene Sulfonic Acid

A series of new spiro 1,2,4-triazoles V-IXa-j were synthesized by the reaction of appropriate amidrazones IV with cyclic ketones in the presence of p-toluene sulfonic acid as a catalyst. The structures of the synthesized compounds have been confirmed by the elemental analysis and spectroscopic data (IR, 1H NMR, 13C NMR and MS). The microbial features of the synthesized compounds were studied using well-established methods from the literature.

A new modification of [Ag4Br4(PPh3)4]: synthesis, structure and properties

2018 ◽  
Vol 73 (10) ◽  
pp. 733-738 ◽  
Author(s):  
Xintong Han ◽  
Shanshan Mao ◽  
Chuang Li ◽  
Kesheng Shen ◽  
Xinkui Shi ◽  
...  
Keyword(s):  
Solid State ◽  
Ir Spectroscopy ◽  
Hydrogen Bonds ◽  
Elemental Analysis ◽  
Supramolecular Structure ◽  
Chair Conformation ◽  
Cyclic Voltammograms ◽  
Structure And Properties ◽  
X Ray ◽  
X Ray Crystallography

AbstractA new modification of the homometallic silver(I) cluster [Ag4Br4(PPh3)4] has been prepared and characterized by elemental analysis, UV/Vis and IR spectroscopy, and X-ray crystallography. The tetramer shows a polycyclic structure with a chair conformation. The bromine atoms adopt μ2- and μ3-bridging modes. The shortest Ag–Ag distance in the cluster is 3.159(2) Å, which indicates significant Ag–Ag interactions. A supramolecular structure is arranged by hydrogen bonds (C–H···Br). Cyclic voltammograms of the cluster indicate a quasi-reversible Ag+/Ag couple. The fluorescence properties of the ligand and the Ag(I) cluster were studied in the solid state. The emission peaks of the Ag(I) cluster are attributed to ligand-centered luminescence.

scholarly journals Synthesis and Characterization of Chloridobis(dimethylglyoximato)4-(2-ferrocenylvinyl)pyridinecobalt(III): A New Heterobinuclear Cobaloxime

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Sebastián Pizarro ◽  
Guillermo Saá ◽  
Francisco Gajardo ◽  
Alvaro Delgadillo
Keyword(s):  
Cyclic Voltammetry ◽  
Charge Transfer ◽  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
Cyclic Voltammogram ◽  
H Nmr ◽  
Ligand Charge Transfer

The synthesis of a new heterobinuclear cobaloxime with 4-(2-ferrocenylvinyl)pyridine, fcvpy, is reported. The complex [CoCl(dmgH)2(fcvpy)], where dmgH2is dimethylglyoxime and dmgH is dimethylglyoximato, has been characterized by1H-NMR, UV-Vis, cyclic voltammetry, and elemental analysis. The cyclic voltammogram of this complex shows a fc/fc+reversible wave at +0.58 V versus Ag/AgCl, one irreversible wave,Epc= −0.54 V versus Ag/AgCl, assigned to the reduction of Co(III) to Co(II), and two quasireversible processes at −1.02 V and −1.10 V versus Ag/AgCl associated with the reduction of Co(II). The complex showed ferrocene-ligand charge transfer bands at 334 nm and 505 nm. TDDFT/B3LYP/6-31G(d) calculations support this assignation.

Synthesis, Characterization and Properties of Arylamine-Acetylene Bridged Tetrahedral Cobalt and Iron Carbonyl Clusters

2013 ◽  
Vol 750-752 ◽  
pp. 1750-1753
Author(s):  
Rui Jia ◽  
Hai Yan Xu ◽  
Qi Feng ◽  
Wen Bao Li ◽  
Bao Hua Zhu
Keyword(s):  
Optical Properties ◽  
Ir Spectroscopy ◽  
Elemental Analysis ◽  
Iron Carbonyl ◽  
Cyclic Voltammogram ◽  
Cobalt Carbonyl ◽  
Carbonyl Clusters ◽  
Ft Ir ◽  
Tetrahedral Iron ◽  
Ft Ir Spectroscopy

Four new arylamine-acetylene bridged tetrahedral iron and cobalt carbonyl clusters, [Co2(CO)4(μ-CO)2(η2, μ-TMSCCPh)2N 1, [Fe2(CO)6(μ-CO)(η2, μ-TMSCCPh)NH(PhCC TMS)] 2, [(Co2(CO)6(η2, μ-TMSCCPh))33 and [(Fe2(CO)6(μ-CO)(η2, μ-TMSCCPh))2N(Ph CCTMS)] 4, were obtained by reactions of Co2(CO)8and Fe3(CO)12with the bis [4-((trimethylsilyl) ethynyl) phenyamine and tris [4-((trimethylsilyl) ethynyl) phenyamine compounds in suitable solvent, respectively. All clusters are confirmed by C/H elemental analysis, MS,1HNMR and FT-IR spectroscopy. Furthermore, the electrochemical and optical properties of some clusters were also determined by cyclic voltammogram (CV) analysis and UV-Vis spectra.

Der elektronisch stabilisierende Beitrag des Ph3P=N-Liganden. Darstellung von CH3WCl4N =PPh3 und das elektrochemische Verhalten von Ph3PN-substituierten Wolfram(VI)-Halogeniden

1987 ◽  
Vol 42 (7) ◽  
pp. 877-880 ◽  
Author(s):  
Herbert W. Roesky ◽  
Tetsuro Tojo ◽  
Michaela Ilemann ◽  
Dieter Westhoff
Keyword(s):  
Cyclic Voltammetry ◽  
Nmr Spectroscopy ◽  
Cyclic Voltammograms ◽  
Cyclic Voltammogram ◽  
Electron Charge ◽  
Potential Reduction ◽  
Reduced Products ◽  
Controlled Potential

Abstract The reaction of CH3WCl5 and Me3SiN = PPh3 yields CH-3WCl4N = PPh3 (1). The electrochem ical reduction of 1, F5WN = PPh3 (2) and F4W (N = PPh3)2 (3) has been investigated using cyclic voltammetry and potentiostatic methods. The cyclic voltammogram of 1 shows two reduction waves at Ef + 1.72 and 0.420 V. The controlled potential reduction of 1 indicates two steps of reversible one-electron charge transfers. The cyclic voltammograms of 2 and 3 in CH2Cl2 show reversible one-electron waves at Ef -0.45 and -1.45 V, respectively. The reduced products were analyzed by 19F and 31P NMR spectroscopy.

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