Search results for "COBALT"
showing 10 items of 1098 documents
Electrochemistry of Bis(pyridine)cobalt (Nitrophenyl)corroles in Nonaqueous Media
2018
International audience; A series of bis(pyridine)cobalt corroles with one or three nitrophenyl groups on the meso positions of the corrole macrocycle were synthesized and characterized as to their electrochemical and spectroscopic properties in dichloromethane, benzonitrile, and pyridine. The potentials for each electrode reaction were measured by cyclic voltammetry and the electron-transfer mechanisms evaluated by analysis of the electrochemical data combined with UV-visible spectra of the neutral, electroreduced, and electroxidized forms of the corroles. The proposed electronic configurations of the initial compounds and the prevailing redox reactions involving the electroactive central c…
Ibuprofen degradation using a Co-doped carbon matrix derived from peat as a peroxymonosulphate activator
2021
The wider presence of pharmaceuticals and personal care products in nature is a major cause for concern in society. Among pharmaceuticals, the anti-inflammatory drug ibuprofen has commonly been found in aquatic and soil environments. We produced a Co-doped carbon matrix (Co-P 850) through the carbonization of Co2+ saturated peat and used it as a peroxymonosulphate activator to aid ibuprofen degradation. The properties of Co-P 850 were analysed using field emission scanning electron microscopy, energy filtered transmission electron microscopy and X-ray photoelectron spectroscopy. The characterization results showed that Co/Fe oxides were generated and tightly embedded into the carbon matrix …
CCDC 1914220: Experimental Crystal Structure Determination
2019
Related Article: Julia Vallejo, Marta Viciano-Chumillas, Francisco Lloret, Miguel Julve, Isabel Castro, J. Krzystek, Mykhaylo Ozerov, Donatella Armentano, Giovanni De Munno, Joan Cano|2019|Inorg.Chem.|58|15726|doi:10.1021/acs.inorgchem.9b01719
COBALT SUBSTITUTED PROTEINS
1995
Cobalt(II) has been extensively used as a spectroscopic probe in many proteins, mainly replacing zinc, but also substituting iron, manganese and copper ions. The relatively short electronic relaxation times of high spin cobalt(II) makes this ion suitable as a paramagnetic probe for Nuclear Magnetic Resonance spectroscopy. A survey of the NMR studies performed in cobalt substituted proteins is shown. In the zinc enzymes Carboxypeptidase A, Carbonic Anhydrase and Superoxide Dismutase the implications of these studies on their catalytic mechanisms are commented. Finally, a further insight in the research of the blue copper protein Azurin by applying NMR to its cobalt derivative is also reporte…
Cubane-Type Mo3CoS4 Molecular Clusters with Three Different Metal Electron Populations: Structure, Reactivity and Their Use in the Synthesis of Hybri…
2004
Heterodimetallic cubane-type complexes coordinated to diphosphanes [Mo(3)CoS(4)(dmpe)(3)Cl(4)](+) ([1](+)) (dmpe=1,2-bis(dimethylphosphanyl)ethane), [Mo(3)CoS(4)(dmpe)(3)Cl(4)] (1) and [Mo(3)CoS(4)(dmpe)(3)Cl(3)(CO)] (2) with 14, 15 and 16 metal electrons, respectively, have been prepared from the [Mo(3)S(4)(dmpe)(3)Cl(3)](+) trinuclear precursor using [Co(2)(CO)(8)] or CoCl(2) as cobalt source. Cluster complexes [1](+) and 1 are easily interconverted chemically and electrochemically. The Co-Cl distance increases upon electron addition and substitution of the chlorine atom coordinated to cobalt with CO only takes place in presence of a reducing agent to give complex 2. Structural changes in…
Low temperature optical spectroscopy of cobalt-substituted hemocyanin from Carcinus maenas
1993
In this work we report the optical absorption spectra of three cobalt-substituted derivatives of hemocyanin (He) from Carcinus maenas, in the temperature range 300–20 K. The derivatives studied are the mononuclear (Co2+)-He with a single cobalt ion in the “CuA” site, the binuclear (Co2+)2-He and the binuclear mixed metal (Co2+-Cu1+)-He. At low temperature three main bands are clearly resolved; the temperature dependence of their zeroth, first and second moments sheds light on the stereodynamic properties in the surroundings of the chromophore. Within the limits of the reported analysis, in the binuclear derivatives the motions coupled to the chromophore appear to be “essentially harmonic” i…
CCDC 1484384: Experimental Crystal Structure Determination
2018
Related Article: Lucas H. G. Kalinke, Jocielle C. O. Cardoso, Renato Rabelo, Ana K. Valdo, Felipe T. Martins, Joan Cano, Miguel Julve, Francesc Lloret, Danielle Cangussu|2018|Eur.J.Inorg.Chem.||816|doi:10.1002/ejic.201701177
CCDC 127034: Experimental Crystal Structure Determination
2000
Related Article: H.Brunner, D.Lucas, T.Monzon, Y.Mugnier, B.Nuber, B.Stubenhofer, A.C.Stuckl, J.Wachter, R.Wanninger, M.Zabel|2000|Chem.-Eur.J.|6|493|doi:10.1002/(SICI)1521-3765(20000204)6:3<493::AID-CHEM493>3.0.CO;2-E
CCDC 725083: Experimental Crystal Structure Determination
2010
Related Article: G.Agusti, C.Bartual, V.Martinez, F.J.Munoz-Lara, A.B.Gaspar, M.C.Munoz, J.A.Real|2009|New J.Chem.|33|1262|doi:10.1039/b905674b
CCDC 725084: Experimental Crystal Structure Determination
2010
Related Article: G.Agusti, C.Bartual, V.Martinez, F.J.Munoz-Lara, A.B.Gaspar, M.C.Munoz, J.A.Real|2009|New J.Chem.|33|1262|doi:10.1039/b905674b