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  • 1.
    Feldt, Sandra M.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Gibson, Elizabeth A.
    Wang, Gang
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Fabregat, Guillermo
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Boschloo, Gerrit
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Carbon counter electrodes efficient catalysts for the reduction of Co(III) in cobalt mediated dye-sensitized solar cells2014In: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 82, p. 154-157Article in journal (Refereed)
    Abstract [en]

    The solar energy conversion efficiency of cobalt-based dye-sensitized solar cells using carbon materials as the catalyst was found similar or better than that of platinum. 

  • 2.
    Gamstedt, Helene
    et al.
    KTH.
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
    Kloo, Lars
    KTH.
    Photoelectrochemical studies of ionic liquid-containing solar cells sensitized with different polypyridyl-ruthenium complexes2009In: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 28, no 4, p. 757-762Article in journal (Refereed)
    Abstract [en]

    The efficiency of dye-sensitized nanocryst. solar cells contg. ionic liqs., composed of org. sulfonium or imidazolium iodides, or a std. org.-liq.-based electrolyte was studied, while using sensitizers based on different polypyridyl-ruthenium complexes. The dyes N-719, [cis-Ru(II)(H2dcbpy)2(NCS)2(TBA)2] and Z-907, [cis-Ru(II)(H2dcbpy)(dnbpy)(NCS)2, Z-907 having a more hydrophobic character, as well as a bidentate beta -diketonato complex, [(dcbpy)2Ru(acetylacetonate)]Cl-, was studied. Solar cells sensitized with the dye N-719 were more efficient than the Z-907 cells, for all electrolytes studied. Adding a co-adsorbent, the amphiphilic hexadecylmalonic acid (HDMA), to Z-907 solar cells contg. an org.-liq. electrolyte resulted in increased overall light-to-electricity conversion efficiencies, from 3.7% to 4.0%, (100 W m-2, AM 1.5). Possibly, this is caused by an insulating hydrophobic barrier formed to suppress unwanted electron losses. By applying TiO2 (P25) nanoparticles, assumed to support electron transfer reactions, to the org.-liq. electrolyte, the conversion efficiency was increased from 4.1% to 4.6% (100 W m-2, AM 1.5). In 1000 W m-2 illumination, the highest overall short-circuit c.d., 9.3 mA cm-2, was achieved with the N-719 sensitized cells, with the TiO2 nanocomposite-contg. org.-liq.-based electrolyte. For solar cells sensitized with N-719, Z-907 or the beta -diketonato complex, and contg. imidazolium or sulfonium iodide ionic liqs., no improvements of the overall conversion efficiency could be noticed at addn. of HDMA to the dye or nanoparticles to the electrolyte.

  • 3.
    Gusev, A. N.
    et al.
    Russian Acad Sci, NS Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia.
    Shul'gin, V. F.
    Russian Acad Sci, NS Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia.
    Braga, E. V.
    Russian Acad Sci, NS Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia.
    Nemec, I.
    Palacky Univ, Div Biol Act Complexes & Mol Magnets, Reg Ctr Adv Technol & Mat, Fac Sci, Slechtitelu 27, CZ-78371 Olomouc, Czech Republic.
    Minaev, B. F.
    Royal Inst Technol, Theoret Chem & Biol Lab, SE-10691 Stockholm, Sweden.
    Baryshnikov, G. V.
    Royal Inst Technol, Theoret Chem & Biol Lab, SE-10691 Stockholm, Sweden.
    Travnicek, Z.
    Palacky Univ, Div Biol Act Complexes & Mol Magnets, Reg Ctr Adv Technol & Mat, Fac Sci, Slechtitelu 27, CZ-78371 Olomouc, Czech Republic.
    Ågren, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Royal Inst Technol, Theoret Chem & Biol Lab, SE-10691 Stockholm, Sweden.
    Eremenko, I. L.
    Palacky Univ, Div Biol Act Complexes & Mol Magnets, Reg Ctr Adv Technol & Mat, Fac Sci, Slechtitelu 27, CZ-78371 Olomouc, Czech Republic.
    Lyssenko, K. A.
    Russian Acad Sci, AN Nesmeyanov Inst Organoelement Cpds, Moscow 119991, Russia.
    Linert, W.
    Vienna Univ Technol, Inst Appl Synthet Chem, Getreidemarkt 9-163-AC, A-1060 Vienna, Austria.
    Synthesis and photophysical properties of Zn(II) Schiff base complexes possessing strong solvent-dependent solid-state fluorescence2018In: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 155, p. 202-208Article in journal (Refereed)
    Abstract [en]

    The present article reports on the syntheses, crystal structures and luminescence properties of three solvate forms of a zinc(II) complex containing 4-{(E)-[(2-fluorophenyl)imino]methyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one (HL). The reaction of zinc(II)acetate with the HL ligand in ethanol and acetonitrile led to the formation of two solvate analogues [Zn(L)(2)]center dot Solv (Solv - ethanol (1) and acetonitrile (2)). The properties of the [Zn(L)(2)]center dot Solv complexes were investigated by UV-Vis absorption and fluorescence emission spectroscopy, and the density functional theory calculations. Bader's topological analysis was performed to investigate the electronic peculiarities of Zn(II) polyhedra and non-covalent interactions within crystal packing of studied solvates. (C) 2018 Elsevier Ltd. All rights reserved.

  • 4.
    Pavliuk, Mariia V.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Makhankova, Valeriya G.
    Kokozay, Vladimir N.
    Omelchenko, Irina V.
    Jezierska, Julia
    Thapper, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Styring, Stenbjörn
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Structural, magnetic, thermal and visible light-driven water oxidation studies of heterometallic Mn/V complexes2015In: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 88, p. 81-89Article in journal (Refereed)
    Abstract [en]

    In this paper a novel synthetic route, being a paradigm of the "direct synthesis" approach, is proposed for the preparation of heterometallic Mn/V compounds by a one-pot reaction. Two synthesized complexes, (NH4)(2)[Mn-2(HGly)(H2O)(10)][V10O28]center dot(HGlY)center dot 2H(2)O (1) and (NR4)(2)[Mn(beta-HAIa)(H2O)(5)](2)[V10O28]center dot 2H(2)O (2) (HGly = glycine, beta-HAla = beta-alanine) have been fully characterized by elemental analysis, single-crystal X-ray diffraction, cyclic voltammetry, magnetic susceptibility, FTIR and EPR spectroscopy. Thermal degradation of these compounds lead to the formation of porous, solid mixed oxides V2O5/MnV2O6 in a ratio of 3:2, which were analyzed by X-ray phase analysis and scanning electron microscopy with energy dispersive X-ray microanalysis (SEM/EDX). Additionally the ability of 1 and 2 to act as oxygen evolving water oxidation catalysts under visible light-driven conditions have been studied in a Clark type cell and by ex situ EPR spectroscopy.

1 - 4 of 4
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