نتایج جستجو برای: complex cobalt ii

تعداد نتایج: 1332367  

Journal: :Chemical communications 2010
Clément Mugemana Pierre Guillet Stephanie Hoeppener Ulrich S Schubert Charles-André Fustin Jean-François Gohy

Amphiphilic metallo-supramolecular diblock copolymers containing either a reversible cobalt(III) or nickel(II) heteroleptic bis-terpyridine complex at the junction between a polystyrene and a poly(ethylene oxide) block have been successfully prepared.

Journal: :Chemical communications 2010
Julian P Bigi Tamara E Hanna W Hill Harman Alicia Chang Christopher J Chang

A cobalt(ii) complex supported by the new tetradentate polypyridyl ligand PY4 is an electrocatalyst for the reduction of protons to hydrogen and can operate in 50% aqueous media.

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Shiro Matsuoka Nobutoshi Shiota Kazuhisa Yoshimura

Flow injection-solid phase spectrometry (FI-SPS) has been applied to the determination of cobalt(II) in water samples. The complex formed between cobalt and 5-Br-PADAB was on-line protonated and concentrated on an AG 50W-X2 cation-exchanger in a flow-through cell. The increase in absorbance caused by the accumulation of the complex in the resin was continuously measured. The interference by cop...

Journal: :Angewandte Chemie 2015
Debashis Basu Shivnath Mazumder Xuetao Shi Habib Baydoun Jens Niklas Oleg Poluektov H Bernhard Schlegel Cláudio N Verani

A series of cobalt complexes with pentadentate pyridine-rich ligands is studied. An initial Co(II) amine complex 1 is prone to aerial oxidation yielding a Co(III) imine complex 2 that is further converted into an amide complex 4 in presence of adventitious water. Introduction of an N-methyl protecting group to the ligand inhibits this oxidation and gives rise to the Co(II) species 5. Both the C...

1997
Myoung Soo Lah Mooshin Moon

The various cobalt(II) complexes were synthesized and characterized using tris-(2-benzimidazolylmethyl)amine (ntb) as a ligand where the ntb plays as a tripodal tetradentate ligand to form complexes with a trigonal pyramidal geometry. The complexes have 5 and 6 coordinate cobalt(II) ions depending on the additional ligand used. In each complex the additional ligand, chloride anion, or acetate a...

Journal: :Chemical communications 2013
Erica Pizzolato Mirco Natali Bianca Posocco Alejandro Montellano López Irene Bazzan Marilena Di Valentin Pierluca Galloni Valeria Conte Marcella Bonchio Franco Scandola Andrea Sartorel

A salophen cobalt(II) complex enables water oxidation at neutral pH in photoactivated sacrificial cycles under visible light, thus confirming the high appeal of earth abundant single site catalysis for artificial photosynthesis.

2005
Fred C. Anson Arthur Amos Noyes

The previously claimed (1) catalysis of the electroreduction of acrylonitrile by means of a complex of Co(l) and 2,2'-bipyridine is shown to be erroneous. The "catalytic currents" result instead from the two-electron reduction of a mixed complex of Co (I) acrylonitrile and 2,2' -bipyridine. The equilibrium and forward rate constants for the formation of the mixed complex have been estimated and...

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