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Porphyrins complexes

Porphyrin complexes have been the most intensively studied macrocyclic complexes of these metals [129], They are formed in a wide range of oxidation states (II-VI) and they are, therefore, treated together under this heading, though most of the chemistry for ruthenium lies in the II-IV states. Octaethylporphyrin (OEP) complexes are typical. [Pg.48]

Structural data on ruthenium porphyrins shows that the Ru-N (porphyrin) distance is relatively unaffected by changing the oxidation state, as expected for a metal atom inside a fairly rigid macrocyclic ring (Table 1.11). [Pg.49]

High oxidation states are accessible a /-butylimide of ruthenium(VI) can be made by oxidative deprotonation [Pg.49]

Water-soluble ruthenium phthalocyanines show promise as photodynamic cancer therapy agents [129b], [Pg.50]

CO2 is reduced electrochemically in the presence of porphyrins and ph-thalocyanines The products of reduction of CO2 on electrodes modified with porphyrins are mainly CO and hydrogen, see Table 7.4. The potentials for CO2 reduction are affected drastically by changes on the ligands coordinated to the porphyrin ring. Table 7.5. [Pg.332]

The use of gas diffusion electrodes modified with porphyrins or phthalocya-nines for CO2 catalysis has been reported by several workers. The involvement of M° state of the metal porphyrin complex has been reported For CoTPP [Pg.332]

M-N4 complex Electrode Method of modification Reactant Main product E. (V) Electrolyte vs. (SCE) Current effi- ciency (%) References [Pg.333]

MN4 complex Electrode Metiiod of modihcation Analyte E (V) (SCE) Medium O/R References  [Pg.335]


Reaction of free-base porphyrin compounds with iton(II) salts in an appropriate solvent results in loss of the two N—H protons and insertion of iron into the tetradentate porphyrin dianion ligand. Five-coordinate iton(III) porphyrin complexes (hemins), which usually have the anion of the iton(II) salt for the fifth or axial ligand, ate isolated if the reaction is carried out in the presence of air. Iron(II) porphyrin complexes (hemes) can be isolated if the reaction and workup is conducted under rigorously anaerobic conditions. Typically, however, iton(II) complexes are obtained from iton(III) porphyrin complexes by reduction with dithionite, thiolate, borohydtide, chromous ion, or other reducing agents. [Pg.441]

The porphyrin ligand can support oxidation states of iron other than II and III. [Fe(I)Por] complexes are obtained by electrochemical or chemical reduction of iron(II) or iron(III) porphyrins. The anionic complexes react with alkyl hahdes to afford alkyl—iron (III) porphyrin complexes. Iron(IV) porphyrins are formally present in the carbene, RR C—Fe(IV)Por p.-carbido, PorFe(IV)—Fe(IV)Por nitrene, RN—Fe(IV)Por and p.-nittido, PorFe(IV)... [Pg.442]

Preeminent in importance among the macro-cyclic complexes of Group 2 elements are the chlorophylls, which are modified porphyrin complexes of Mg. These compounds are vital to the process of photosynthesis in green plants (see Panel). Magnesium and Ca are also intimately... [Pg.125]

Progress in investigation of ruthenium porphyrin complexes 97MI10. [Pg.248]

The observation that addition of imidazoles and carboxylic acids significantly improved the epoxidation reaction resulted in the development of Mn-porphyrin complexes containing these groups covalently linked to the porphyrin platform as attached pendant arms (11) [63]. When these catalysts were employed in the epoxidation of simple olefins with hydrogen peroxide, enhanced oxidation rates were obtained in combination with perfect product selectivity (Table 6.6, Entry 3). In contrast with epoxidations catalyzed by other metals, the Mn-porphyrin system yields products with scrambled stereochemistry the epoxidation of cis-stilbene with Mn(TPP)Cl (TPP = tetraphenylporphyrin) and iodosylbenzene, for example, generated cis- and trans-stilbene oxide in a ratio of 35 65. The low stereospecificity was improved by use of heterocyclic additives such as pyridines or imidazoles. The epoxidation system, with hydrogen peroxide as terminal oxidant, was reported to be stereospecific for ris-olefins, whereas trans-olefins are poor substrates with these catalysts. [Pg.202]

Compounds containing ruthenium(IV) such as the dithiocarbamates Ru(S2CNR2)3C1 (section 1.8.6) and the porphyrin complexes (section 1.8.6) were mentioned above. Certain phosphine complexes RuH4(PR3)3 are best regarded as ruthenium(II) compounds Ru(H)2(t 2-H2)(PR3)3 (section 1.8.2). [Pg.52]

With a tridentate ligand Au(terpy)Cl3.H20 has, in fact, AuCl(terpy)2"1" with weakly coordinated chloride and water while Au(terpy)Br(CN)2 has square pyramidal gold(III) the terpyridyl ligand is bidentate, occupying the axial and one basal position [124]. Macrocyclic complexes include the porphyrin complex Au(TPP)Cl (section 4.12.5) cyclam-type macrocyclic ligands have a very high affinity for gold(III) [125],... [Pg.303]

Heme (C34H3204N4Fe) represents an iron-porphyrin complex that has a protoporphyrin nucleus. Many important proteins contain heme as a prosthetic group. Hemoglobin is the quantitatively most important hemoprotein. Others are cytochromes (present in the mitochondria and the endoplasmic reticulum), catalase and peroxidase (that react with hydrogen peroxide), soluble guanylyl cyclase (that converts guanosine triphosphate, GTP, to the signaling molecule 3, 5 -cyclic GMP) and NO synthases. [Pg.581]

Enikolopyan et al.til found that certain Co11 porphyrin complexes (eg. 87) function as catalytic chain transfer agents. Later work has established that various square planar cobalt complexes (e.g. the cobaloximes 88-92) are effective transfer agents.Ij2 m The scope and utility of the process has been reviewed several times,1 lt>JM ns most recently by Hcuts et al,137 Gridnev,1 3X and Gridnev and Ittel."0 The latter two references1provide a historical perspective of the development of the technique. [Pg.310]

Oganova et a/. observed that certain cobalt (II) porphyrin complexes reversibly inhibit BA polymerization presumably with formation of a cobalt (111) intermediate as shown in Scheme 9.27. Thus, it seemed reasonable to propose these species may function as initiators in living radical polymerization.250 259... [Pg.484]

An explanation of the relative oxygen and carbon monoxide affinities of some iron(II) porphyrin complexes. T. Hashimoto and F. Basolo, Comments Inorg. Chem., 1981,1,199-205 (18). [Pg.47]


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A Thermodynamic Model Self-Assembly of Zinc Porphyrin Complexes

Acylperoxo-iron porphyrin complexes

Aggregation porphyrin complex

Alkene complexes cobalt porphyrins

Alkene complexes osmium porphyrins

Alkene complexes ruthenium porphyrins

Alkyl complexes cobalt porphyrins

Alkyl complexes iridium porphyrins

Alkyl complexes osmium porphyrins

Alkyl complexes rhodium porphyrins

Alkyl complexes ruthenium porphyrins

Alkyne complexes ruthenium porphyrins

Aluminum complexes porphyrins

Aniline-zinc porphyrin complexes

Antimony complexes porphyrins

Aryl complexes cobalt porphyrins

Asymmetric porphyrine-containing complexe

Bismuth complexes porphyrins

Bond lengths porphyrin complexes

Bottom-Up Fabrication of the Porphyrin-Terminated Redox-Conducting Metal Complex Film on ITO

Calcium complexes porphyrins

Carbene complexes with cobalt porphyrins

Carbene complexes with iron porphyrins

Carbene complexes with osmium porphyrin

Carbene complexes with rhodium porphyrins

Carbene complexes with ruthenium porphyrins

Cerium, porphyrin complexes

Chromium complexes porphyrin complex, formation

Chromium complexes porphyrins

Cobalt porphyrin and related complexes

Cobalt porphyrin complex

Cobalt porphyrins hydride complexes

Cobalt porphyrins nitrosyl complexes

Complex Zn11 porphyrin

Complex cationic porphyrin

Complex formation porphyrin units

Complexes of Porphyrins and Related Systems

Coordination complexes porphyrin polymers

Copper complexes porphyrin complex, formation

Copper complexes porphyrins

Cytochrome manganese porphyrin complexes

Deoxyhemoglobin iron-porphyrin complex

Erbium, porphyrin complexes

Europium, porphyrin complexes

Fluorescence porphyrin complexes

Fullerene porphyrin/zinc complex

Gadolinium, porphyrin complexes

Gallium complexes porphyrins

Germanium complexes porphyrins

Gold -porphyrin complex

Ground state complexes porphyrins

Hafnium complexes porphyrins

Hangman porphyrin complexes

Heme nitrosyl porphyrinate complexes

Homogeneous epoxidation porphyrin complexes

Hydride complexes rhodium porphyrin

Incorporation of Porphyrin and Phthalocyanine Complexes

Indium complexes porphyrins

Intermolecular ruthenium -porphyrin complexes

Iridium complexes porphyrins

Iron , complex of porphyrin

Iron complexes porphyrin dioxygen complex

Iron porphyrin complexes properties

Iron porphyrin peroxo complexes

Iron porphyrins carbene complexes

Iron porphyrins nitrosyl complexes

Iron-porphyrin complex, reversible binding

Lanthanum complexes porphyrins

Lead complexes porphyrins

Lithium complexes porphyrins

Lutetium, porphyrin complexes

Magnesium porphyrin complexes

Magnesium porphyrin, complex with

Manganese complexes with porphyrin

Manganese porphyrin complexes

Manganese porphyrins nitrosyl complexes

Mercury complexes porphyrins

Metal-porphyrin peroxo complex

Metallo-complexes porphyrins molecules

Metalloporphyrins, applications porphyrin complex

Mn porphyrin complex

Molybdenum complexes porphyrin, oxidation

Molybdenum complexes porphyrins

Nickel complexes with porphyrin, formation

Niobium complexes porphyrins

Nuclear magnetic resonance porphyrin complexes

Osmium porphyrins carbene complexes

Oxidative using iron porphyrin complexes

Pacman porphyrin complexes

Palladium complexes porphyrins

Phosphorus complexes porphyrins

Photoelectric Conversion System Using Porphyrin and Redox-Conducting Metal Complex Wires

Phthalocyanines and Porphyrins Complexes

Platinum complexes porphyrin

Polymer complexes porphyrins

Porphyrin actimide and lanthanide complexes

Porphyrin actinide and lanthanide complexes

Porphyrin and phthalocyanine complexes

Porphyrin and salen complexes

Porphyrin complex stability

Porphyrin complex, formation

Porphyrin complexes Gouterman model

Porphyrin complexes absorption spectra study

Porphyrin complexes applications

Porphyrin complexes boron

Porphyrin complexes metal, reduction

Porphyrin complexes overview

Porphyrin complexes reactivity

Porphyrin complexes research

Porphyrin complexes structures

Porphyrin complexes synthesis

Porphyrin complexes with cobalt

Porphyrin complexes with copper

Porphyrin complexes with iron

Porphyrin complexes, diastereoselective

Porphyrin complexes, osmium

Porphyrin complexes, oxidation-reduction

Porphyrin metal complex catalysts, alkene

Porphyrin metal complex catalysts, alkene epoxidation

Porphyrin sandwich complexes, synthesis

Porphyrin, hydrometal complexes

Porphyrin, hydrometal complexes biology

Porphyrin, tetrabenzozinc complexes geochemistry

Porphyrin, tetrabenzozinc complexes oxidation catalysts

Porphyrin-based manganese complexes

Porphyrin-clay complexes, thermal

Porphyrin-clay complexes, thermal analysis

Porphyrin-containing complexes

Porphyrin-fullerene complexes

Porphyrin-metal complexes

Porphyrin-quinone complexes

Porphyrinic metal complex

Porphyrins (and Tetraazaporphyrins) as Ligands in Metal Complexes

Porphyrins Metal complex formation

Porphyrins alkaline earth metal complexes

Porphyrins and Related Complexes

Porphyrins cadmium complexes

Porphyrins complexes and

Porphyrins complexes in solution

Porphyrins complexes with ionic ligands

Porphyrins fullerene complexation

Porphyrins high spin complexes

Porphyrins iron complexes

Porphyrins lanthanide complexes

Porphyrins ligand complexes

Porphyrins nickel complexes

Porphyrins porphyrin-enzyme complex

Porphyrins tantalum complexes

Porphyrins terminated redox-conducting metal complex

Porphyrins transition metal complexes

Porphyrins zinc complexes

Potassium complexes porphyrins

Rare Earth Complexes with Porphyrin Type Ligands

Rare-earth porphyrin complexes

Redox mechanism porphyrin complexes

Rhenium complexes porphyrins

Rhodium complexes porphyrin

Rhodium porphyrins carbene complexes

Ruthenium porphyrins carbene complexes

Ruthenium porphyrins complexation

Ruthenium porphyrins hydride complexes

Ruthenium-porphyrin complexes

Samarium, porphyrin complexes

Scandium complexes porphyrins

Silicon complexes porphyrins

Silver complexes porphyrins

Sodium complexes porphyrins

Supported catalysts manganese-porphyrin complexes

Technetium complexes porphyrins

Tellurium complexes porphyrins

Terbium, porphyrin complexes

Tetrakis porphyrin cobalt complex

Tetramethyl-porphyrin complexes

Tetrapyrrole complexes porphyrins

Thallium complexes porphyrins

Thermal analysis of porphyrin-clay complexes

Thiols using porphyrin complexes

Thorium, porphyrin complexes

Tin porphyrins complexes

Titanium complexes porphyrins

Titanium complexes with porphyrins

Titanium porphyrin peroxo complexes

Transition metal complexes, cobalt porphyrins

Triple-decker porphyrin complex

Tungsten complexes porphyrins

Unfunctionalized olefins, epoxidation porphyrin complex

Vanadium complexes porphyrins

Vinyl complexes iron porphyrins

Water-Soluble Porphyrin Complexes

Ytterbium, porphyrin complexes

Yttrium, porphyrin complexes

Zinc porphyrin complexes self-assembly

Zinc porphyrin complexes, strapped

Zinc porphyrin, complex with

Zirconium complexes porphyrins

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