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  • 1.
    Arnold, Polly L.
    et al.
    Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland.
    Purkis, Jamie M.
    Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland.
    Rutkauskaite, Ryte
    Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland.
    Kovacs, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
    Love, Jason B.
    Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland.
    Austin, Jonathan
    Natl Nucl Lab, 5th Floor,Chadwick House,Birchwood Pk, Warrington WA3 6AE, Cheshire, England.
    Controlled Photocatalytic Hydrocarbon Oxidation by Uranyl Complexes2019In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 11, no 16, p. 3786-3790Article in journal (Refereed)
    Abstract [en]

    Controlled, photocatalytic C-H bond activations are key reactions in the toolkits of the modern synthetic chemist. While it is known that the uranyl(VI) ion, [(UO2)-O-VI](2+), the environmentally dominant form of uranium, is photoactive, most literature examines its luminescent properties, neglecting its potential synthetic utility for photocatalytic C-H bond cleavage. Here, we synthesise and fully characterise an air-stable and hydrocarbon-soluble uranyl phenanthroline complex, [(UO2)-O-VI(NO3)(2)(Ph(2)phen)], U-Ph2phen, and demonstrate that it can catalytically abstract hydrogen atoms from a variety of organic substrates under visible light irradiation. We show that the commercially available parent complex, uranyl nitrate ([(UO2)-O-VI(NO3)(2)(OH2)(2)]center dot 4H(2)O; U-NO3), is also competent, but from electronic spectroscopy we attribute the higher rates and selectivity of U-Ph2phen to ligand-mediated electronic effects. Ketones are selectively formed over other oxygenated products (alcohols, etc.), and the catalytic oxidation of substrates containing a benzylic C-H position is particularly improved for U-Ph2phen. We also show uranyl-mediated photocatalytic C-C bond cleavage in a model lignin compound for the first time.

  • 2.
    Dawange, Monali
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Galkin, Maxim V.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Samec, Joseph S. M.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Selective Aerobic Benzylic Alcohol Oxidation of Lignin Model Compounds: Route to Aryl Ketones2015In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 7, no 3, p. 401-404Article in journal (Refereed)
    Abstract [en]

    A mild and chemoselective oxidation of the -alcohol in -O-4-ethanoaryl and -O-4-glycerolaryl ethers has been developed. The benzylic alcohols were selectively dehydrogenated to the corresponding ketones in 60-93% yield. A one-pot selective route to aryl ethyl ketones was performed. The catalytic system comprises recyclable heterogeneous palladium, mild reaction conditions, green solvents, and oxygen in air as oxidant. Catalytic amounts of a coordinating polyol were found pivotal for an efficient aerobic oxidation.

  • 3.
    Galkin, Maxim V.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Sawadjoon, Supaporn
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Rohde, Volker
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Dawange, Monali
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Samec, Joseph S. M.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Mild Heterogeneous Palladium-Catalyzed Cleavage of beta-O-4 '-Ether Linkages of Lignin Model Compounds and Native Lignin in Air2014In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 6, no 1, p. 179-184Article in journal (Refereed)
    Abstract [en]

    A mild and robust heterogeneous palladium-catalyzed CO bond cleavage of 2-aryloxy-1-arylethanols using formic acid as reducing agent in air was developed. The cleaved products were isolated in 92-98% yield; and by slightly varying the reaction conditions, a ketone, an alcohol, or an alkane can be generated in near-quantitative yield. This reaction is applicable to cleaving the -O-4-ether bond found in lignin polymers of different origin. The reaction was performed on a lignin polymer model to generate either the monomeric aryl ketone or alkane in a quantitative yield. Moderate depolymerization was achieved with native lignin at similar reaction conditions. Mechanistic studies under kinetic control indicate that an initial palladium-catalyzed dehydrogenation of the alcohol is followed by insertion of palladium to an enol equivalent. A palladium-formato complex reductively cleaves the palladium-enolate complex to generate the ketone.

  • 4.
    Gizinski, Damian
    et al.
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Blachucki, Wojciech
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Srebowata, Anna
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Zienkiewicz-Machnik, Malgorzata
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Goszewska, Ilona
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Matus, Krzysztof
    Silesian Tech Univ, Inst Engn Mat & Biomat, Konarskiego 18 A, PL-44100 Gliwice, Poland.
    Lisovytskiy, Dmytro
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Pisarek, Marcin
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Szlachetko, Jakub
    Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland;Polish Acad Sci, Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Sá, Jacinto
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    On-the-fly Catalyst Accretion and Screening in Chemoselective Flow Hydrogenation2018In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 10, no 17, p. 3641-3646Article in journal (Refereed)
    Abstract [en]

    Herein, it is reported an on-the-fly accretion/reaction protocol to evaluate the structure-performance relationship in the chemoselective flow citral hydrogenation over Ni-based catalysts. Based on the methodology one was able to determine Ni nanoparticles ideal average size (ca. 9nm), in a rapid and facile manner. The methodology offers a simple workflow, cost-effective and adaptable strategy for process intensification and optimization.

  • 5. Kartusch, Christiane
    et al.
    Makosch, Martin
    Sa, Jacinto
    Hungerbuehler, Konrad
    van Bokhoven, Jeroen A.
    The Dynamic Structure of Gold Supported on Ceria in the Liquid Phase Hydrogenation of Nitrobenzene2012In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 4, no 2, p. 236-242Article in journal (Refereed)
  • 6. Makosch, Martin
    et al.
    Sa, Jacinto
    Kartusch, Christiane
    Richner, Gilles
    van Bokhoven, Jeroen A.
    Hungerbuehler, Konrad
    Hydrogenation of Nitrobenzene Over Au/MeOx CatalystsuA Matter of the Support2012In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 4, no 1, p. 59-63Article in journal (Refereed)
  • 7.
    Ozer, Lütfiye Y.
    et al.
    Khalifa Univ Sci & Technol, Masdar Inst Masdar City, Dept Chem Engn, POB 54224, Abu Dhabi, U Arab Emirates.
    Apostoleris, Harry
    Khalifa Univ Sci & Technol, Masdar Inst Masdar City, Dept Mech Engn, POB 54224, Abu Dhabi, U Arab Emirates.
    Ravaux, Florent
    Khalifa Univ Sci & Technol, Masdar Inst Masdar City, Dept Mech Engn, POB 54224, Abu Dhabi, U Arab Emirates.
    Shylin, Sergii I.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Mamedov, Fikret
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström.
    Lindblad, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Johansson, Fredrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Chiesa, Matteo
    Khalifa Univ Sci & Technol, Masdar Inst Masdar City, Dept Mech Engn, POB 54224, Abu Dhabi, U Arab Emirates; Arctic Univ Norway UiT, Arctic Renewable Energy Ctr ARC, Dept Phys & Technol, Tromso, Norway.
    Sá, Jacinto
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Polish Acad Sci, Inst Phys Chem, Warsaw, Poland.
    Palmisano, Giovanni
    Khalifa Univ Sci & Technol, Masdar Inst Masdar City, Dept Chem Engn, POB 54224, Abu Dhabi, U Arab Emirates.
    Long-Lasting Non-hydrogenated Dark Titanium Dioxide: Medium Vacuum Anneal for Enhanced Visible Activity of Modified Multiphase Photocatalysts2018In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 10, no 14, p. 2949-2954Article in journal (Refereed)
    Abstract [en]

    Multiphase TiO2 was stably modified by vacuum treatment for a dramatic improvement in visible-light absorption and photocatalytic reactivity. The samples were made of rutile-brookite, bare or N doped, and were grown on reduced graphene oxide. The stable introduction of Ti3+ species and oxygen vacancies resulting in mitigated electron?hole recombination was identified as the main responsible factor, along with a change in surface charges.

  • 8. Sa, Jacinto
    et al.
    Ace, Matthew
    Jose Delgado, Juan
    Goguet, Alexandre
    Hardacre, Christopher
    Morgan, Kevin
    Activation of Alkanes by Gold-Modified Lanthanum Oxide2011In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 3, no 2, p. 394-398Article in journal (Refereed)
  • 9.
    Sá, Jacinto
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland.
    Medlin, J. Will
    Univ Colorado, Dept Chem & Biol Engn, JSCBB D125 3415 Colorado Ave, Boulder, CO 80303 USA.
    On-the-fly Catalyst Modification: Strategy to Improve Catalytic Processes Selectivity and Understanding2019In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 11, no 15, p. 3355-3365Article, review/survey (Refereed)
    Abstract [en]

    Hydrogenation is a quintessential process to the chemical industry. It is heavily involved in organic synthesis and fuel production, among other processes. Preferentially the reactions are carried out with heterogeneous catalysts and when possible in flow mode. Herein, we provide a retrospective on selective surface modification of catalysts for improved selectivity and understanding of catalytic reactivity. In addition, we provide a prospectus for an emerging strategy of carrying out surface modification on-the-fly to produce novel catalysts in a fast and reproducible way and to understand catalytic phenomena.

  • 10. Taylor, Sarah F. R.
    et al.
    Sa, Jacinto
    Hardacre, Christopher
    Friedel-Crafts Alkylation of Aromatics with Benzyl Alcohol over Gold-Modified Silica2011In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 3, no 1, p. 119-121Article in journal (Refereed)
  • 11.
    Tsupova, Svetlana
    et al.
    Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany..
    Cadu, Alban
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Organic Chemistry. Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany..
    Stuck, Fabian
    Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany..
    Rominger, Frank
    Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany..
    Rudolph, Matthias
    Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany..
    Samec, Joseph S. M.
    Stockholm Univ, Dept Organ Chem, S-10691 Stockholm, Sweden..
    Hashmi, A. Stephen K.
    Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany.;King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia..
    Dual Gold(I)-catalyzed Cyclization of Dialkynyl Pyridinium Salts2017In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 9, no 11, p. 1915-1920Article in journal (Refereed)
    Abstract [en]

    Novel dialkynyl pyridines were synthesized and protected as alkyl salts for dual gold(I)-catalyzed cycloisomerization. Different alkyl groups and counter ions were screened for the salts, with benzyl and hexafluorophosphate providing the best results. The cyclization led to NMR yields of >95% being obtained for a number of substrates. Step-wise hydrogenation of products could be performed in one-pot by Pd/C, with selective reduction of the double bonds, followed by deprotection of the benzyl group.

  • 12.
    Verendel, J. Johan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
    Diner, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.
    Efficient, Low Temperature Production of Hydrogen from Methanol2013In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 5, no 10, p. 2795-2797Article in journal (Other academic)
  • 13. Wu, Mingxing
    et al.
    Wang, Yudi
    Lin, Xiao
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Ma, Tingli
    An Autocatalytic Factor in the Loss of Efficiency in Dye-Sensitized Solar Cells2012In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 4, no 9, p. 1255-1258Article in journal (Refereed)
  • 14. Yun, Sining
    et al.
    Hagfeldt, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
    Ma, Tingli
    Superior Catalytic Activity of Sub-5 mu m-Thick Pt/SiC Films as Counter Electrodes for Dye-Sensitized Solar Cells2014In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 6, no 6, p. 1584-1588Article in journal (Refereed)
    Abstract [en]

    Dye-sensitized solar cells with sub-5 mu m-thick Pt/SiC-P (1.79 at.% Pt), Pt/SiC-M (0.45 at.% Pt), and Pt/SiC-R (0.39 at.% Pt) counter electrode (CE) films fabricated by using three different processes produced power conversion efficiencies of 6.82, 7.64, and 7.04% that reached 86.5, 97.0, and 89.3 %, respectively, of the level obtained by using a print-Pt CE (7.88 %). These materials can reduce the cost of CEs and solve challenges involving Pt.

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