Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 744-763 of 1299
-
Article
Organized silica films generated by evaporation-induced self-assembly as hosts for iron oxide nanoparticles
(2013)In this work, we prepared oriented mesoporous thin films of silica on various solid substrates using the pluronic block copolymer P123 as a template. We attempted to insert guest iron oxide (FexOy) nanoparticles into these ...
-
Article
Origin and reactivity of active and inactive carbon formed during DRM over Ni/Ce0.38Zr0.62O2-δ studied by transient isotopic techniques
(2018)The role of Ce0.38Zr0.62O2-δ redox support and that of reactants CH4 and CO2 in the carbon-path of dry reforming of methane (DRM) at 750°C over a 3wt% Ni/Ce0.38Zr0.62O2-δ catalyst were investigated. In particular, meticulously ...
-
Article
Origin and reactivity of active and inactive carbon formed during DRM over Ni/Ce0.38Zr0.62O2-δ studied by transient isotopic techniques
(2016)The role of Ce0.38Zr0.62O2-δ redox support and that of reactants CH4 and CO2 in the carbon-path of dry reforming of methane (DRM) at 750°C over a 3wt% Ni/Ce0.38Zr0.62O2-δ catalyst were investigated. In particular, meticulously ...
-
Article
The origin of the Fe IV = O intermediates in cytochrome aa 3 oxidase
(2012)The dioxygen reduction mechanism in cytochrome oxidases relies on proton control of the electron transfer events that drive the process. Proton delivery and proton channels in the protein that are relevant to substrate ...
-
Book Chapter
Overview of Polymer and Copolymer Materials for Organic Photovoltaics
(Wiley Blackwell, 2014)
-
Article
Oxalamide based coordination polymers
(Taylor & Francis Group, 2020-11-24)Employment of N,N′-bis(2-dicarboxyphenyl)-oxalamide (H4L) in the M2+ chemistry (M = Mg, Mn, Co, Ni, and Zn) afforded five 2-D coordination polymers and one 1-D coordination polymer. The crystal structures of all complexes ...
-
Article
Oxidation of Isodiphenylfluorindine: Routes to 13-Oxoisodiphenylfluorindinium Perchlorate and Fluorindine Cruciform Dimers
(2018)Isodiphenylfluorindine (5) reacts with K2Cr2O7/H+ to give 13-oxoisodiphenylfluorindinium perchlorate (7) (75%), but with phenyliodine bis(trifluoroacetate) (PIFA) or MnO2 it gives the zwitterionic and quinoidal cruciform ...
-
Article
Oxidation of Tetraphenylhexaazaanthracene: Accessing a Scissor Dimer of a 16π Biscyanine
(2016)Tetraphenylhexaazaanthracene (TPHA), a fluorescent zwitterionic biscyanine with a closed-shell singlet ground state, on treatment with manganese dioxide or phenyliodine bis(trifluoroacetate) (PIFA), undergoes oxidative ...
-
Article
Oxidative cyclodehydrogenation of a perylene derivative: different reagents give different products1
(2015)
-
Article
Oxidovanadium(IV/V) complexes as new redox mediators in dye-sensitized solar cells: A combined experimental and theoretical study
(2015)Corrosiveness is one of the main drawbacks of using the iodide/triiodide redox couple in dye-sensitized solar cells (DSSCs). Alternative redox couples including transition metal complexes have been investigated where ...
-
Article
Oxovanadium(IV)-Amide Binding. Synthetic, Structural, and Physical Studies of {N-[2-(4-Oxopent-2-En-2-Ylamino)Phenyl]Pyridine-2-Carboxamido}Oxovanadium(IV) and {N-[2-(4-Phenyl-4-Oxobut-2-en-2-Ylamino)Phenyl]Pyridine-2-Carboxamido}Oxovanadium(IV)
(1992)The complexes [VO(pycac)] and [VO(pycbac)] were prepared by the reaction of bis(pentane-2, 4-dionato)oxovanadium(IV) with either N-[2-(4-oxopent-2-en-2-ylamino)phenyl]pyridine-2-carboxamide (H2pycac) or 7V-[2-(4-phenylox ...
-
Article
Oxovanadium(IV)-sulfite compounds: Synthesis and structural and physical studies
(2005)Reaction of VIVOCl2 in strongly acidic aqueous solution with either (NH4)2SO3 or Na 2SO3 and Bu4NBr at ∼70 °C in the pH range 2.5-4.5 gives the clusters (NH4)2{[V 4IV)(μ4-O)2(μ3-OH) 2](VIVO)2(μ3-SO3) 4O4(H2O)2} and (n-Bu ...
-
Article
Oxy-chlorination as an effective treatment of aged Pd/CeO 2-Al 2O 3 catalysts for Pd redispersion
(2012)The present work reports on the effects of oxy-chlorine gas treatment (use of Cl 2/O 2/He gas mixture) applied on a 5wt% Pd/20wt% CeO 2-Al 2O 3 catalyst towards Pd redispersion. X-ray diffraction (XRD), X-ray photoelectron ...
-
Article
p-Hydroquinone-metal compounds: Synthesis and crystal structure of two novel VV-p-hydroquinonate and VIV-p-semiquinonate species
(2002)Reaction of the p-hydroquinone derivative H2Na4bicah·4H2O with either VIVOSO4·3H2O and NaVVO3 in equivalent quantities or with NaVVO3 yields the tetranuclear VIVO2+ macrocycle-semiquinonate compound Na6{(VIVO)4-(μ2-O) ...
-
Article
p-phenylenecarbenonitrene and its halogen derivatives: How does resonance interaction between a nitrene and a carbene center affect the overall electronic configuration?
(2001)A series of para-conjugatively coupled phenylenecarbenonitrenes {(4-nitrenophenyl)methylene (3a), (4-nitrenophenyl)fluoromethylene (3b), (4-nitrenophenyl)chloromethylene (3c), and (4-nitrenophenyl)bromomethylene (3d)} were ...
-
Article
Palladium catalyzed C-C coupling reactions of 3,5-dichloro-4 H -1,2,6-thiadiazin-4-one
(2011)Palladium catalyzed Suzuki-Miyaura, Stille, and Sonogashira coupling reactions are reported for the electron-deficient heterocyclic scaffold 3,5-dichloro-4H-1,2,6-thiadiazin-4-one (1). Furthermore, 3,5-di(thien-2-yl)-4H- ...
-
Article
Partial oxidation of methane to synthesis gas over Ru/TiO2 catalysts
(1996)The catalytic partial oxidation of methane to synthesis gas is investigated over Group VIII metal catalysts. It is shown that while all catalysts promote methane combustion followed by reforming with H2O and CO2, the Ru/TiO2 ...
-
Article
Partial oxidation of methane to synthesis gas over supported ruthenium catalysts
(1997)The partial oxidation of methane to synthesis gas has been investigated over Ru supported on SiO2, γ-Al2O3, YSZ (Yttria-stabilized zirconia) and TiO2 catalysts in the temperature range of 550-750°C. The results show that ...
-
Conference Object
-
Article
Pd-catalyzed C-N coupling of primary (het)arylamines with 5-substituted 3-chloro-4H-1,2,6-thiadiazin-4-ones
(2018)The Buchwald-Hartwig Pd-catalyzed C-N coupling reaction of 5-substituted 3-chloro-4H-1,2,6-thiadiazin-4-ones with primary (het)arylamines is described, affording twenty new 3,5-disubstituted 4H-1,2,6-thiadiazin-4-ones in ...