7440-43-9Relevant articles and documents
Synthesis and characterisation of zinc gallyl complexes: First structural elucidations of Zn-Ga bonds
Jones, Cameron,Rose, Richard P.,Stasch, Andreas
, p. 2997 - 2999 (2007)
Reactions of the anionic gallium(i) heterocycle, [:Ga{[N(Ar)C(H)] 2}]- (Ar = C6H3Pri 2-2,6), with two N,N-chelated zinc chloride complexes have yielded the compounds, [{Pri2
Synthesis, characterization and photoelectrochemical properties of poly(3,4-dioctyloxythiophene)-CdS hybrid electrodes
Refczynska, Monika,Mieczkowski, Józef,Skompska, Magdalena
, p. 2984 - 2993 (2008)
CdS-poly(3,4-dioctyloxythiophene) (CdS-PDOT) hybrid electrode has been prepared by electrosynthesis of PDOT on Au substrate followed by electrodeposition of Cd and its chemical transformation into CdS. The polymer and semiconductor obtained by this method form hemispherical structures dispersed on the substrate. The synthesized composites were characterized by UV-vis absorption spectra and energy dispersive X-ray spectra (EDS). The AFM images of the electrodes covered with different amounts of each component were correlated with photoactivity of the hybrid electrodes. Photoresponses of Au/PDOT-CdS electrodes under illumination in aqueous solution of Na2S were also compared with those of CdS without polymer. Enhancement of the photocurrent achieved for some polymer-to-semiconductor ratio is discussed in terms of the hybrid electrode morphology and hole-mediating properties of PDOT. The power conversion efficiency of the device based on CdS-PDOT hybrid electrode was determined from photocurrent-potential behavior of two electrode system, Au/CdS-PDOT/0.1 M Na2S/Pt with a variable resistance in series in the external circuit.
Denham
, p. 556 - 556 (1919)
Electrodeposition of cadmium from a sulfate electrolyte in the presence of a fixative
Medvedev,Makrushin
, p. 62 - 64 (2010)
Electrodeposition of cadmium from a sulfate electrolyte containing CdSO4 · 8/3H2O, H2SO4, and a fixative was studied.
Qian, Y.-T.,Kershaw, R.,Soled, S.,Dwight, K.,Wold, A.
, p. 211 - 216 (1984)
Yntema, L. F.,Audrieth, L. F.
, p. 2693 - 2698 (1930)
Radiation Electrochemistry of the Colloidal Cadmium Microelectrode. Catalysis of Hydrogen Formation by Organic Free Radicals
Henglein, A.,Lilie, J.
, p. 1246 - 1251 (1981)
Cadmium sols with a mean particle size of 11 nm or less were obtained in the radiolytic reduction of Cd2+ ions in the presence of 1E-4 - 1E-3 base-M sodium polyvinyl sulfate.These sols which contained small concentrations of residual Cd2+ were found to catalyze the formation of hydrogen by 1-hydroxy-1-methylethyl radicals, (CH3)2COH, as efficiently as the sols of the previously studied noble metals.The organic radicals transfer electrons to the colloidal particles at a practically diffusion-controlled rate.The cathodically charged colloidal particles first reduce and deposit residual cadmium ions and then store excess electrons.Both the stored electrons and the deposited cadmium atoms are able to produce H2 from water.The reduction of water by deposited cadmium atoms is explained by a two-step mechanism: (1) dissolution of an atom as Cd2+ to leave negative charges on the colloidal particle and (2) transfer of these charges to water.The mechanism of catalysis is also described in terms of an equivalent electrical circuit, in which the colloidal microelectrode appears as a capacitance for the storage of reduction equivalents.A 3E-4 M cadmium solution (containing ca. 3E-5 M residual Cd2+ ions) was found to have a capacity of 0.98 F/L for the storage of excess electrons.
Synthesis, structural characterization, and spectroscopy of the cadmium-cadmium bonded molecular species Ar′CdCdAr′ (Ar′ = C6H3-2,6-(C6H3-2,6-Pr i2)2)
Zhu, Zhongliang,Fischer, Roland C.,Fettinger, James C.,Rivard, Eric,Brynda, Marcin,Power, Philip P.
, p. 15068 - 15069 (2006)
The synthesis and first structural characterization of a cadmium-cadmium bonded molecular compound Ar-CdCdAr- (Ar- = C6H3-2,6-(C6H3-2,6-Pri2)2) are reported. The existence of the Cd-Cd bond was established by 113Cd NMR spectroscopy and X-ray diffraction (Cd-Cd = 2.6257(5) A). Like its group 12 analogue Ar-ZnZnAr-, DFT calculations showed that Ar-CdCdAr- had significant p-character in the Cd-Cd σ-bonding HOMO. Copyright
House, J. E. Jr.,Marquardt, Lois A.
, p. 277 - 282 (1989)
∞1[M(μ-O2C-C6H 4-CO2)(NH3)2] (M = Cu, Cd; O 2C-C6H4-CO2 = benzene-1,4- dicarboxylate, terephthalate): ID coordination polymers with strong inter-chain hydrogen bonding
Paul, Barbara,Zimmermann, Boris,Fromm, Katharina M.,Janiak, Christoph
, p. 1650 - 1654 (2004)
Compounds ∞1[M(μ-O2C-C 6H4-CO2)(NH3)2] crystallize as straight- (M = Cu) and kinked-chain (M = Cd) coordination polymers through the bridging action of the bis-mono (Cu) and bisbidentate (Cd) benzene-1,4-dicarboxylate (terephthalate) ligand. N-H...O hydrogen bonding connects the chains to a three-dimensional supramolecular network. Thermogravimetry shows the compounds to be stable up to 255°C (M = Cu) and 70°C (M = Cd) where decomposition starts with the loss of one ammin ligand. ∞1[(Cd(μ-O2C-C6H 4-CO2)(NH3)2] exhibits a luminescence with λem,max = 392 nm (λex = 240 nm) on the same order of magnitude as Na2(O2C-C 6H4-CO2).
ENHANCED MASS TRANSPORT IN ELECTROGALVANIZING SYSTEMS BY HYDROGEN EVOLUTION.
Chen,O'Keefe
, p. 789 - 794 (1988)
The effect of hydrogen evolution on mass transport during electrogalvanizing was evaluated for a vertical electrode by using a electrochemical tracer. The potentiodynamically measured limiting current of a petroleum tracer was compared with those obtained by the codeposition method at various current densities. The effects of pH on the hydrogen evolution and the mass transfer rate during electrogalvanizing were also determined. The Sherwood number was calculated and compared with that predicted by natural convection. It has been found that the mass transport was mainly enhanced by natural convection at current densities less than 25 mA cm** minus **2 and by simultaneous hydrogen evolution at relatively higher current densities.
Kinetics and mechanism of free-surface vaporization of zinc, cadmium and mercury oxides analyzed by the third-law method
L'vov, Boris V.,Ugolkov, Valery L.,Grekov, Fedor F.
, p. 187 - 193 (2004)
On the basis of critical comparison of experimental and theoretical values of the E parameter and investigation of the retardation effect of oxygen on the evaporation rate of ZnO, CdO and HgO, it was concluded that the dissociative evaporation of ZnO and HgO proceeds with releasing of atomic oxygen (O) as a primary product of decomposition. By contrast, the mechanism of dissociative evaporation of CdO corresponds to the equilibrium reaction with releasing of molecular oxygen (O2) as a primary product of decomposition. As was shown, this difference in mechanisms is not related with interatomic O-O distances in these oxides. From the analysis of crystal structure for 12 different oxides, which evaporate with releasing of atomic oxygen, and for 13 compounds, which evaporate with releasing of molecular oxygen, it was revealed that the first mechanism is observed for all oxides with the cubic crystal structure. It was proposed that a decisive role in this difference belongs to a local symmetry in the position of O atoms.
A new binuclear Cd(II)-containing ionic liquid: Preparation and electrocatalytic activities
Zhuang, RuiRui,Jian, FangFang,Wang, KeFei
, p. 3614 - 3618 (2009)
The present work reports on the synthesis, characterization and performance of a new metal-containing ionic liquid [(C10H21)2-bim]2[Cd2Cl6] (bim = benzimidazole) as an electrocatalyst of hy
Fabrication of metal cadmium nanowires by an assistant thermal decomposition method
Zhao, Jian-Wei,Ye, Chang-Hui,Fang, Xiao-Sheng,Yan, Peng,Zhang, Li-De
, p. 1482 - 1483 (2005)
Using a simple assistant thermal decomposition method, metal cadmium nanowires were large-scale fabricated from CdS powders in an argon atmosphere. Investigation results demonstrate that the Cd nanowires have lengths of several microns and diameter of about 70-150 nm. Copyright
Metal azelate coordination polymers containing a kinked dipyridyl tether: CdSO4 topology and "ligand vacancy" primitive cubic three-dimensional networks
Shyu, Eric,Krishnan, Subhashree Mallika,Supkowski, Ronald M.,LaDuca, Robert L.
, p. 1437 - 1446 (2009)
Hydrothermal self-assembly has generated three coordination polymers incorporating the kinked hydrogen-bonding capable tethering ligand 4,4′-dipyridylamine (dpa) and the long flexible aliphatic dicarboxylate azelate dianion (-O2C(CH
ON THE MECHANISM OF GROWTH OF CdTe BY ORGANOMETALLIC VAPOR-PHASE EPITAXY.
Bhat,Taskar,Ghandhi
, p. 195 - 198 (1987)
In this paper are presented some experimental results to explain mechanisms involved in the growth of CdTe by organometallic vapor-phase epitaxy (OMVPE). A pyrolysis study of dimethylcadmium (DMCd) was conducted in an OMVPE reactor, in the temperature range 230 degree -400 degree C. It was found that dimethylcadmium decomposes above approximately 230 degree C and the reaction is heterogeneous from 230 degree to 370 degree C. CdTe growth was also studied over a range of temperature from 300 degree to 375 degree C and for various reactor parameters. In all cases, the CdTe deposition rate was found to be closely related to the decomposition of dimethylcadmium.
Precursor synthesis and magnetic properties of Cd1?xFexO (0 ? x ? 0.07)
Krasil'nikov, Vladimir N.,Dyachkova, Tatyana V.,Tyutyunnik, Alexander P.,Gyrdasova, Olga I.,Perevozchikova, Yuliya A.,Marchenkov, Vyacheslav V.,Weber, Harald W.
, p. 456 - 458 (2017)
The polycrystalline solid solutions Cd1 – xFexO (0 ? x ? 0.07) possessing ferromagnetic properties at 5 K and room temperature have been synthesized by a precursor method using the formate Cd1 – xFex(HCOO)2 ·2H2O.
Underpotential deposition of cadmium adatoms on Te and CdTe
Osipovich,Poznyak
, p. 996 - 1002 (2006)
Underpotential deposition (UPD) of Cd adatoms onto the surface of Te and CdTe films in Cd2+-containing solutions has been studied using electrochemical methods and AFM. The electrochemical deposition of Cd adatoms on Te and CdTe begins at potentials 400 mV more positive than the reversible potential of Cd2+/Cd couple and proceeds irreversibly. A strong chemical interaction of Cd adatoms with the surface Te atoms is the driving force of the UPD process. The deposition of Cd adatoms on the tellurium surface is accompanied by their stepwise interaction with tellurium to give CdTe nanophase.
Multipulse electrochemical/chemical synthesis of CdS/S core/shell nanocrystals exhibiting ultranarrow photoluminescence emission lines
Gorer,Penner
, p. 5750 - 5753 (1999)
Ensembles of sulfur capped, cadmium sulfide nanocrystals (CdS/S NCs) which exhibit photoluminescence (PL) emission line widths of 15-35 meV at 20 K have been obtained. These CdS/S NCs were synthesized using a new variant of the electrochemical/chemical (E/C) method: Cadmium (Cd°) NCs were first electrodeposited from an aqueous Cd2+ plating solution using a train of 8-10 ms plating pulses separated by ≈1.0 s mixing segments at the open circuit potential. These Cd° nanoparticles were then oxidized to Cd-(OH)2, and CdS/S NCs were obtained by exposure of Cd(OH)2 nanoparticles to H2S at 300°C. Ensembles of 200 000-400 000 CdS/S NCs prepared using this multipulse technique exhibited PL emission lines narrower than 35 meV. CdS/S NCs were also synthesized using the same E/C method except that a single Cd° plating pulse was employed, and these CdS/S NCs exhibited PL emission line widths of 125-180 meV. TEM analysis of Cd(OH)2 precursor particles confirms that the narrower lines obtained using multipulse Cd° electrodeposition result from improved size monodispersity of the CdS core, which is attributed to the diffusional decoupling of Cd° nanoparticles during growth.
METALLAVIOLENES. AN ESR STUDY
Kaim, Wolfgang
, p. 157 - 170 (1983)
The preparation and ESR-spectroscopic characterization of radical complexes cation radical with L=4,4'-bipyridine is described, where MRn=BePh, MgPh, ZnPh, -BEt3, GaMe2, InMe2 and SiMe3.While the bis(trimethylsilyl) derivative could be obtained via one-electron oxidation of the corresponding 4,4'-(1H, 1'H)-bipyridinylidene, the other complexes were prepared by the reaction of 4,4'-bipyridine with potassium and the organometal MRn+1 or the halide XMRn in THF.Use of organo-cadmium or -thallium compounds in such a procedure leads to deposition of the metals.The Grignard reagents MgPh2 and BrMgPh reduce 4,4'-bipyridine in an electron transfer process to yield an unsymmetrical complex.The new organometallic 4,4'-bipyridinium ( violene ) radical complexes can be incorporated into a series of related radicals which exhibits the sensitivity of the unpaired electron distribution towards metal coordination.
Preparation, characterization and catalytic behavior of CdFe 2O4 and Cd nanocrystals on AP, HTPB and composite solid propellants, Part: 79
Singh,Kapoor,Dubey, Reena,Srivastava, Pratibha
, p. 112 - 118 (2010)
CdFe2O4 and Cd nanocrystals were synthesized by wet chemical and hydrazine reduction methods, respectively. These nanocrystals were characterized by XRD and TEM. Their catalytic activity was investigated on the thermal decomposition
Cadmium electroextraction from alkali oxide melts
Barbin,Kazantsev,Vatolin
, p. 576 - 579 (2005)
A method is proposed for cadmium electroextraction from alkali oxide melts, suitable for CdO-containing waste processing. A bench-top electrolyzer design is described, and the process parameters are optimized.
Harrison, J. A.,Sandbach, D. R.,Stronach, P. J.
, p. 179 - 190 (1979)
Kersten, H.
, p. 649 - 653 (1931)
Synthesis, dft calculations, antiproliferative, bactericidal activity and molecular docking of novel mixed-ligand salen/8-hydroxyquinoline metal complexes
Abdalla, Ehab M.,Abdel Rahman, Laila H.,Al-Farhan, Badriah Saad,Basha, Maram T.,El-Ezz, Doaa Abou,El-Saghier, Ahmed M. M.,Marzouk, Adel A.,Shehata, Mohamed R.
, (2021/08/13)
Despite the common use of salens and hydroxyquinolines as therapeutic and bioactive agents, their metal complexes are still under development. Here, we report the synthesis of novel mixed-ligand metal complexes (MSQ) comprising salen (S), derived from (2,2′-{1,2-ethanediylbis [nitrilo(E) methylylidene]}diphenol, and 8-hydroxyquinoline (Q) with Co(II), Ni(II), Cd(II), Al(III), and La(III). The structures and properties of these MSQ metal complexes were investigated using molar conductivity, melting point, FTIR,1H NMR,13C NMR, UV–VIS, mass spectra, and thermal analysis. Quantum calculation, analytical, and experimental measurements seem to suggest the proposed structure of the compounds and its uncommon monobasic tridentate binding mode of salen via phenolic oxygen, azomethine group, and the NH group. The general molecular formula of MSQ metal complexes is [M(S)(Q)(H2O)] for M (II) = Co, Ni, and Cd or [M(S)(Q)(Cl)] and [M(S)(Q)(H2O)]Cl for M(III) = La and Al, respectively. Importantly, all prepared metal complexes were evaluated for their antimicrobial and anticancer activities. The metal complexes exhibited high cytotoxic potency against human breast cancer (MDA-MB231) and liver cancer (Hep-G2) cell lines. Among all MSQ metal complexes, CoSQ and LaSQ produced IC50 values (1.49 and 1.95 μM, respectively) that were comparable to that of cisplatin (1.55 μM) against Hep-G2 cells, whereas CdSQ and LaSQ had best potency against MDA-MB231 with IC50 values of 1.95 and 1.43 μM, respectively. Furthermore, the metal complexes exhibited significant antimicrobial activities against a wide spectrum of both Gram-positive and-negative bacterial and fungal strains. The antibacterial and antifungal efficacies for the MSQ metal complexes, the free S and Q ligands, and the standard drugs gentamycin and ketoconazole decreased in the order AlSQ > LaSQ > CdSQ > gentamycin > NiSQ > CoSQ > Q > S for antibacterial activity, and for antifungal activity followed the trend of LaSQ > AlSQ > CdSQ > ketoconazole > NiSQ > CoSQ > Q > S. Molecular docking studies were performed to investigate the binding of the synthesized compounds with breast cancer oxidoreductase (PDB ID: 3HB5). According to the data obtained, the most probable coordination geometry is octahedral for all the metal complexes. The molecular and electronic structures of the metal complexes were optimized theoretically, and their quantum chemical parameters were calculated. PXRD results for the Cd(II) and La(III) metal complexes indicated that they were crystalline in nature.
Anti-hepatocellular carcinoma, antioxidant, anti-inflammation and antimicrobial investigation of some novel first and second transition metal complexes
Hassan, Safaa S.,Khalf-Alla, Perihan A.
, (2020/02/05)
New coordination compounds of some selected metal ions from the first and second transition metals series with a Schiff base were synthesized and characterized. The Schiff base is derived from 4-Aminoantipyrine and 3-(hydroxyimino) butan-2-one. The compounds were characterized by different analysis tools like; elemental analysis, mass spectra, Fourier transform infrared (FTIR) as well as electronic spectra, magnetic measurements, molar conductance and thermal analysis technique. All complexes were formed with 1:1 (metal: ligand) stoichiometry except Mn (II) where 1:2 (Mn: ligand) is formed. Schiff base ligand interacted as a tridentate ligand by using the nitrogen atoms of the imine and the oximato groups and the carbonyl oxygen atom as donor groups with all studied metal ions except copper (II) and manganese (II) where the carbonyl oxygen is not shared in the coordination. These complexes show various physicochemical properties. X-ray powder diffraction shows different crystal systems; Cd (II) complex: hexagonal, Cu (II) complex: orthorhombic; and [Ni (II), Mn (II), Rh (III) & Pd (II)] complexes: monoclinic. All compounds showed potent cytotoxicity against the growth of human liver cancer cell lines. The square planar Pd (II) complex was more active than those of octahedral geometries of all other synthesized complexes. Cd (II) complex has the highest microbial growth inhibition than the rest of the prepared complexes. The docking active sites interactions were evaluated using the selected proteins EGFR tyrosine kinase and protein crystal structure of GlcN-O-P synthase. in vitro antioxidant assay revealed potent free radical scavenging activity of the three synthesized Cu (II), Pd (II) and Rh (III) complexes that exceeded the standard ascorbic acid. Pd (II) complex shows the most significant inhibition denaturation percent.