Osmium complexes electrochemistry

For each gold nanoparticle, it was coordinated to nine pyridine ligands from the P4VP block, and each particle was essentially labeled with an Os(bpy)2(pyridine) complex. Electrochemistry results suggested that the osmium complex enhanced the conductivity of the polymer/nano-particle composite film. 

ELECTROCHEMISTRY AND SPECTROELECTROCHEMISTRY OF DINUCLEAR RUTHENIUM AND OSMIUM COMPLEXES. 

Bond length, bond angle, and electrochemistry data for some osmium phosphoraminato complexes are collected in Table 16. 

Dinuclear clusters ferrous site distortion, 38 175 spin ladder, 38 182-183 Dinuclear cobalt complex, 45 291-293 Dinuclear complexes osmium, electrochemistry, 37 321-323 quadruply bridged, 40 187-235 axial ligand substitution properties, 40 232-234... 

Polynuclear complexes, 32 56 osmium, electrochemistry, 37 321-323 X-ray diffraction, 39 217-225 Polynuclear compounds, inert metal complexes, 34 186... 

There is a recent review on the electrochemistry of osmium dithiocarbamato complexes.69 ... 

Bursten BE (1982) Ligand additivity applications to the electrochemistry and photoelectron spectroscopy of d octahedral complexes. J Am Chem Soc 104 1299-1304 Birtje K (1987) Neue bindungsisomere Thiocyanato-und Selenocyanatokomplexe des drei-und vierwertigen Osmiums. Ph.D. thesis, Kiel University... 

Introduction of the desired metal complex into the polymer film was accomplished by performing electrochemistry in an 0.2 M TBAH/CH2CI2 electrolyte solution which was 5 nM in complex. Solutions of the osmium and rhenium phosphines were protected from light due to their photolytic instability. All solutions were degassed using a stream of Cl C -saturated nitrogen. An N2 blanket was maintained during the course of the experiment to prevent subsequent aeration. 

Osmium, quinuclidinetetraoxime-stereochemistry, 44 Osmium, tetrachloronitrido-tetraphenylarsenate stereochemistry, 44 Osmium, tris( 1,10-phenanthroline) -structure, 64 Osmium(II) complexes polymerization electrochemistry, 488 Osmium(III) complexes magnetic behavior, 273 Osmium(lV) complexes magnetic behavior, 272 Osmium(V) complexes magnetic behavior, 272 Osmium(VI) complexes magnetic behavior, 272 Oxaloacetic acid decarboxylation metal complexes, 427 Oxamidoxime in gravimetry, 533 Oxidation-reduction potentials non-aqueous solvents, 27 Oxidation state nomenclature, 120 Oxidative addition reactions, 282 Oxidative dehydrogenation coordinated imines, 455 Oximes... 

Although, as already mentioned, the iron II and III oxidation states are so dominant, we will nevertheless attempt to equally treat in this chapter, the electrochemistry of iron complexes in every documented oxidation state. Besides, despite the fact that iron will be considered almost exclusively, the redox chemistry of the other metals of the iron group, ruthenium and osmium, will also be discussed, together with its applications in bioelectrochemistry. 

Coordination complexes of iron(II) and (III) are so numerous and usually easily oxidized and/or reduced, that it is impossible to give a comprehensive account of their electrochemistry in such a concise format. Again, the reader is urged to read the relevant chapters in books cited in Ref. 1 to contemplate the diversity of complexes of iron, ruthenium, and osmium in the II/III state, and find entries to their chemistry and electrochemistry. Here, we will first give an overview of some of the classic ligands used with metals of the iron group, especially when interesting electrochemistry has been described. Then... 

If a chemical reaction follows an electrochemical step, the cyclic voltam-mogram is typically irreversible and i jip 1 and/or A p 59/n mV. Cyclic voltammetry can be used to estimate the relative energy of the frontier orbitals of a series of complexes for each coordination site. A cyclic voltammogram for [Os(bpy)3] shows a reversible oxidation with 1/2= 0.81 V and three reversible reductions starting at —1.29 V. The oxidation is representative of Os , while the reduction represents sequential bpy for each coordinated ligand. The electrochemistry shows that frontier orbitals of [Os(bpy)3] involve an osmium-based HOMO and a bpy-based LUMO. This is consistent with the photochemical properties of [Os(bpy)3] in which the lowest energy... 

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