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.

Electrochemically Synthesis and Characterization of Copolymers Based on 1, 4-Diethoxybenzene and 3, 4-Ethylenedioxythiophene

2011 ◽  
Vol 335-336 ◽  
pp. 989-993
Author(s):  
Mi Ouyang ◽  
Zhen Wei Yu ◽  
Yi Xu ◽  
Yu Jian Zhang ◽  
Cheng Zhang
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Feed Ratio ◽  
Synthesis And Characterization ◽  
Monomer Mixture ◽  
Long Wavelength ◽  
H Nmr ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Copolymers based on 1, 4-diethoxybenzene (DEB) and 3, 4-ethylenedioxythiophene (EDOT) were electrochemically synthesized and characterized. The structures of the copolymers were established by 1H NMR and FT-IR spectroscopy. The results indicated the final product was a copolymer instead of a blend or a composite. The physical properties were systematically investigated by cyclic voltammetry, UV-vis absorption and fluorescence. The PL maximum of copolymers presented obviously red-shift to long wavelength as the feed ratio of EDOT in monomer mixture increased.

Microwave Synthesis and Characterization of Nanoscale Lanthanum Cobaltite

2012 ◽  
Vol 476-478 ◽  
pp. 1322-1326
Author(s):  
Xiao Yu Jiang ◽  
Jin Chen ◽  
Wen Zhe Chen
Keyword(s):  
Cyclic Voltammetry ◽  
Steady State ◽  
Microwave Irradiation ◽  
Reaction Order ◽  
Synthesis And Characterization ◽  
Cyclic Voltammogram ◽  
Lanthanum Cobaltite ◽  
Bet Analysis ◽  
Perovskite Type

Nanoscale lanthanum cobaltite with perovskite-type was successfully synthesized by microwave irradiation directly and was characterized by XRD, SEM, XPS and BET analysis. The results show that the size of particle was 18 nm averagely, the surface area to be 31.0 m2 g−1. The electrochemical properties were studied by cyclic voltammetry and steady state polarization. The cyclic voltammogram between 0 and 0.55 V exhibited two pairs of redox peaks prior to the onset of O2 evolution in 1 mol dm−3 KOH. The Tafel slope and the reaction order with respect to concentration of OH− were found to be 60 mV decade−1 and ca. 1, respectively.

Titanocene derivatives of purine and adenine. Synthesis and characterization of reaction products with (η5-C5H5)2Ti(CO)2, (η5-C5H5)2TiCl, and (η5-C5H5)2TiCl2

1986 ◽  
Vol 64 (4) ◽  
pp. 751-759 ◽  
Author(s):  
Daniel Cozak ◽  
Abdelhakim Mardhy ◽  
André Morneau
Keyword(s):  
Carbon Monoxide ◽  
Metal Complex ◽  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
Reaction Products ◽  
First Order ◽  
H Nmr ◽  
New Compounds ◽  
Derivatives Of

The reaction of CpTi(CO)2 (1), Cp2TiCl (2), and Cp2TiCl2 (3) (Cp = η5-C5H5) with purine (PuH) and adenine (AdH) in organic solvents is described. The compound 1 reacts with both molecules in an oxidative fashion giving Cp2Ti(C5H3N4)(C5H4N4) (4) and (Cp2Ti)2(C5H3N5) (5) with concomitant liberation of molecular carbon monoxide and hydrogen (4:1) following a first order rate law in metal complex. The compound 2 forms an adduct compound Cp2TiCl(C5H4N4) (6) with PuH. Monosubstituted derivatives Cp2TiCl(C5H3N4) (7) and Cp2TiCl(C5H4N5) (8) are formed from the reaction of the deprotonated bases with 3. In addition to the usual elemental analysis, the characteristic ir, 1H nmr, epr, and ms results are given for the new compounds.

Synthesis and characterization of novel metal-free and metallophthalocyanines peripherally fused to four 24-membered tetraoxatetraaza macrocycles

2001 ◽  
Vol 05 (04) ◽  
pp. 367-375 ◽  
Author(s):  
S. ZEKİ YILDIZ ◽  
HALTİ KANTEKİN ◽  
YAŞAR GÖK
Keyword(s):  
Elemental Analysis ◽  
Metal Salt ◽  
Synthesis And Characterization ◽  
Organic Base ◽  
Metal Free ◽  
H Nmr ◽  
New Compounds ◽  
Derivatives Of ◽  
C Nmr

New metal-free 5 and metallophthalocyanines 6-11( M = Cu , Ni , Co , Pb , Zn ) fused in peripheral positions with four 24-membered tetraoxatetraaza macrocycles were prepared by cyclotetramerization of 24,25-dicyano-4,10,13,17-tetra(toluene-p-sulfonyl)-1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22-didicontinehydrobenzo[y][3,9,12,18]tetraaza[1,7,16,22]tetraoxatetradicontine in the presence of the corresponding metal salt or a strong organic base. While the N-tosylated derivatives of the phthalocyanines are soluble in common organic solvents, the detosylated derivative of copper phthalocyaninate is soluble in water. The aggregation properties of the phthalocyanines were also investigated as a function of concentration, solvent and oxidative medium. The new compounds are characterized by a combination of elemental analysis and 1 H NMR, 13 C NMR, IR, UV-vis and MS spectral data.

Synthesis and characterization of the rare-earth complexes with salicylic acid

2006 ◽  
Vol 60 (2) ◽  
Author(s):  
Y. Xuwu ◽  
S. Wujuan ◽  
K. Congyu ◽  
Z. Li ◽  
Z. Hangguo ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Salicylic Acid ◽  
Rare Earth ◽  
Elemental Analysis ◽  
Ir Spectrum ◽  
Rare Earth Complexes ◽  
Enthalpies Of Formation ◽  
Synthesis And Characterization ◽  
Bomb Calorimeter

AbstractSeven rare-earth complexes with salicylic acid RE(HSal)3·nH2O (HSal = C7H5O3; RE = La-Sm, n = 2; RE = Eu, Gd, n = 1) were synthesized and characterized by elemental analysis, the IR spectrum, and cyclic voltammetry. The constant-volume combustion energies of complexes, Δc U, were determined by a precise rotating-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, Δc H mo, and standard molar enthalpies of formation, Δf H mo, were calculated.

Synthesis and characterization of new metal-free and metal phthalocyanines with peripheral N'-2-(cyanoethyl)-aminoethylsulfanyl substituents

2001 ◽  
Vol 05 (10) ◽  
pp. 717-720 ◽  
Author(s):  
M. S. AǦIRTAŞ ◽  
Ö. BEKAROǦLU
Keyword(s):  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
Metal Phthalocyanines ◽  
Metal Free ◽  
H Nmr ◽  
Vis Spectroscopy ◽  
New Compounds

The synthesis of new metal-free and zinc(II), cobalt(II) phthalocyanines substituted with four 4-(2-N'-cyanoethyl)aminoethylsulfanyl groups is described. The new compounds have been characterized by elemental analysis and IR, 1 H NMR and UV-vis spectroscopy.

Synthesis and characterization of π-conjugated oligomers that contain metal-to-ligand charge transfer chromophores†

1999 ◽  
pp. 1749-1750 ◽  
Author(s):  
Kevin D. Ley ◽  
Yiting Li ◽  
Jodie V. Johnson ◽  
David H. Powell ◽  
Kirk S. Schanze
Keyword(s):  
Charge Transfer ◽  
Synthesis And Characterization ◽  
Conjugated Oligomers ◽  
Ligand Charge Transfer

Synthesis and Characterization of 7 - (3 - (substituted-phenoxy) propoxy) Quinazoline Derivatives

2013 ◽  
Vol 781-784 ◽  
pp. 1003-1006
Author(s):  
He Ping Yan ◽  
Gui Ping Ouyang
Keyword(s):  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Quinazoline Derivatives ◽  
C Nmr

Four compounds of 7-(3- (substituted-phenoxy) propoxy) quinazoline compounds, including 7-(3-(2,4-dichlorophenoxy) propoxy)-N-(3-chlorophenyl)-6-methoxyquinazolin-4-amine, 7-(3-(2-chlo-rophenoxy) propoxy)-N-(3-chlorophenyl)-6-methoxyquinazolin-4-amine, 7-(3-(4-chlorophenoxy) prop-oxy)-N-(3-chlorophenyl)-6-methoxyquinazolin-4-amine, 7-(3-(naphthalen-3-yloxy) propoxy)-N-(3-chl-orophenyl)-6-methoxyquinazolin-4-amine, were synthesized fromN-(5-(3-chloropropoxy)-2-cyano-4-methoxyphen-yl)-N, N-dimethylformamidine by cyclization,etheration, in the yield of 45.9%50.6%56.34% and 80.6% respectively. Their structures were characterized by IR,1H NMR,13C NMR, MS and elemental analysis.

Synthesis and Characterization of Novel Polyurethanes Based on N,N'-1,2-Ethanediylbis-(4-Hydroxy-Pentanamide) and 4-Hydroxy-N-(2-Hydroxyethyl)-Pentanamide

2011 ◽  
Vol 277 ◽  
pp. 112-119 ◽  
Author(s):  
Mochamad Chalid
Keyword(s):  
Functional Groups ◽  
Elemental Analysis ◽  
Levulinic Acid ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Backbone Structure ◽  
C Nmr

As diols, N,N'-1,2-ethanediylbis-(4-hydroxy-pentanamide) (1) and 4-hydroxy-N-(2-hydroxyethyl)-pentanamide (2)) are versatile precursors for the manufacture of bio-polymers. Polymer design, by exploiting the variation in structure of both diol and di-isocyanate monomers, such as backbone structure and presence of functional groups, appears to be a promising biopolymer engineering pathway to synthesize polyurethanes. Both diols (1) and (2) were then polymerized by reaction with aliphatic and aromatic di-isocyanates at 140 °C in (N,N-dimethylacetamide (DMA) solvents using triethylamine (TEA) catalysts, to obtain novel polyurethanes. The products were characterized by FTIR, 1H-NMR, 13C-NMR, and Elemental Analysis. This working has created a new chance to synthesis bio-polyurethanes based on levulinic acid, as one of biomass compounds

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