Search Results - "Köhler, Klaus"

Leaching Mechanism of Different Palladium Surface Species in Heck Reactions of Aryl Bromides and Chlorides by Gnad, Christoph, Abram, Andrea, Urstöger, Alexander, Weigl, Florian, Schuster, Michael, Köhler, Klaus

“…Since the development of solid palladium catalysts for the Heck coupling reaction, many studies focused on the differentiation between homogeneous and…”
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Abatement of nitrous oxide by ruthenium catalysts: Influence of the support by Zheng, Jian, Meyer, Simon, Köhler, Klaus

“…•Synthesis of Ru particles of narrow size distribution (1.5–2nm) on oxide, carbon and carbide supports.•Activated carbon and silicon carbide supports act as…”
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Palladium leaching dependent on reaction parameters in Suzuki–Miyaura coupling reactions catalyzed by palladium supported on alumina under mild reaction conditions by Soomro, Saeeda S., Ansari, Farzana L., Chatziapostolou, Konstantinos, Köhler, Klaus

“…Various reaction parameters including temperature, solvent, base, substrates and additives influence the palladium leaching in Suzuki coupling reactions…”
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Genesis of Coordinatively Unsaturated Palladium Complexes Dissolved from Solid Precursors during Heck Coupling Reactions and Their Role as Catalytically Active Species by Köhler, Klaus, Kleist, Wolfgang, Pröckl, Sandra S

“…The Forum Article critically summarizes investigations and discussions on the nature and role of potential active species in C−C coupling reactions of the Heck…”
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Leaching of palladium atoms from small cluster models during Heck reactions – An experimental and theoretical study by Wussow, Katharina, Abram, Andrea, Köhler, Klaus, Chang, Chun-Ran, Genest, Alexander, Li, Jun, Rösch, Notker

“…Relevant parameters for the leaching of palladium atoms from small Pd clusters during Heck reactions of bromobenzene and styrene have been explored…”
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Manganese containing copper aluminate catalysts: Genesis of structures and active sites for hydrogenation of aldehydes by Dörfelt, Christoph, Hammerton, Michelle, Martin, David, Wellmann, Alexander, Aletsee, Clara C., Tromp, Moniek, Köhler, Klaus

“…[Display omitted] •Copper aluminate spinel catalysts comprehensively characterized by multiple techniques.•Complex hydrogenation reaction mechanism including…”
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Fluoridonitrosyl Complexes of Technetium(I) and Technetium(II). Synthesis, Characterization, Reactions, and DFT Calculations by Balasekaran, Samundeeswari Mariappan, Spandl, Johann, Hagenbach, Adelheid, Köhler, Klaus, Drees, Markus, Abram, Ulrich

“…A mixture of [Tc­(NO)­F5]2– and [Tc­(NO)­(NH3)4F]+ is formed during the reaction of pertechnetate with acetohydroxamic acid (Haha) in aqueous HF. The blue…”
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In Situ Generation of Highly Active Dissolved Palladium Species from Solid Catalysts-A Concept for the Activation of Aryl Chlorides in the Heck Reaction by Pröckl, Sandra S., Kleist, Wolfgang, Gruber, Markus A., Köhler, Klaus

“…Needing a leach: Optimized palladium/metal oxide systems are highly active heterogeneous catalysts for the Heck reaction. Non‐activated and deactivated aryl…”
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Macrocyclic Palladium(II) Complexes in CC Coupling Reactions: Efficient Catalysis by Controlled Temporary Release of Active Species by Röhlich, Christoph, Köhler, Klaus

“…Stabilization of palladium species against agglomeration is essential for reasonable catalytic activity in CC coupling reactions. In contrast to common…”
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Reduced nonthermal rollover of wide-well GaInN light-emitting diodes by Maier, Markus, Köhler, Klaus, Kunzer, Michael, Pletschen, Wilfried, Wagner, Joachim

“…Nonthermal rollover (or efficiency droop) of the electroluminescence (EL) efficiency has been investigated for near-UV-emitting (AlGaIn)N single-well…”
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Acceleration of the Rate of the Heck Reaction through UV- and Visible-Light-Induced Palladium(II) Reduction by Fredricks, Margaret Anne, Drees, Markus, Köhler, Klaus

“…Irradiation with light (UV and visible) increases the rate of the Heck reaction using homogeneous (palladium(II) acetate) and heterogeneous (Pd/Al2O3 and…”
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Highly Active Palladium/Activated Carbon Catalysts for Heck Reactions: Correlation of Activity, Catalyst Properties, and Pd Leaching by Köhler, Klaus, Heidenreich, Roland G., Krauter, Jürgen G. E., Pietsch, Jörg

“…A variety of palladium on activated carbon catalysts differing in Pd dispersion, Pd distribution, Pd oxidation state, and water content were tested in Heck…”
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Heck Reactions of Aryl Chlorides Catalyzed by Ligand Free Palladium Salts by Kleist, Wolfgang, Pröckl, Sandra S., Köhler, Klaus

“…Palladium acetate has been shown to be a highly active catalyst for Heck reactions of aryl chlorides even in the absence of organic ligands. Bromobenzene can…”
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Control of Pd leaching in Heck reactions of bromoarenes catalyzed by Pd supported on activated carbon by Heidenreich, Roland G, Krauter, Jürgen G.E, Pietsch, Jörg, Köhler, Klaus

“…Parameters that influence the palladium leaching during and after Heck reactions of aryl bromides with olefins catalyzed by heterogeneous Pd on activated…”
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Single-Site VO x Moieties Generated on Silica by Surface Organometallic Chemistry: A Way To Enhance the Catalytic Activity in the Oxidative Dehydrogenation of Propane by Barman, Samir, Maity, Niladri, Bhatte, Kushal, Ould-Chikh, Samy, Dachwald, Oliver, Haeßner, Carmen, Saih, Youssef, Abou-Hamad, Edy, Llorens, Isabelle, Hazemann, Jean-Louis, Köhler, Klaus, D’ Elia, Valerio, Basset, Jean-Marie

“…We report here an accurate surface organometallic chemistry (SOMC) approach to propane oxidative dehydrogenation (ODH) using a μ2-oxo-bridged, bimetallic…”
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Coherent Zone-Folded Longitudinal Acoustic Phonons in Semiconductor Superlattices: Excitation and Detection by Bartels, Albrecht, Dekorsy, Thomas, Kurz, Heinrich, Köhler, Klaus

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Supported palladium as catalyst for carbon–carbon bond construction (Heck reaction) in organic synthesis by Köhler, Klaus, Wagner, Michael, Djakovitch, Laurent

“…The catalytic activity and selectivity of palladium supported on various metal oxides and zeolites in carbon–carbon coupling reactions of aryl bromides with…”
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Quantum Cascade Detectors by Giorgetta, F.R., Baumann, E., Graf, M., Quankui Yang, Manz, C., Kohler, K., Beere, H.E., Ritchie, D.A., Linfield, E., Davies, A.G., Fedoryshyn, Y., Jackel, H., Fischer, M., Faist, J., Hofstetter, D.

“…This paper gives an overview on the design, fabrication, and characterization of quantum cascade detectors. They are tailorable infrared photodetectors based…”
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Reduction of the threading edge dislocation density in AlGaN epilayers by GaN nucleation for efficient 350 nm light emitting diodes by Gutt, Richard, Kirste, Lutz, Passow, Thorsten, Kunzer, Michael, Köhler, Klaus, Wagner, Joachim

“…We report on the reduction of the threading edge dislocation density of Al0.15Ga0.85N buffer layers for efficient 350 nm light‐emitting diodes (LEDs)…”
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On-Surface Carbon Nitride Growth from Polymerization of 2,5,8-Triazido‑s‑heptazine by Krinninger, Matthias, Bock, Nicolas, Kaiser, Sebastian, Reich, Johanna, Bruhm, Tobias, Haag, Felix, Allegretti, Francesco, Heiz, Ueli, Köhler, Klaus, Lechner, Barbara A. J., Esch, Friedrich

“…Carbon nitrides have recently come into focus for photo- and thermal catalysis, both as support materials for metal nanoparticles as well as photocatalysts…”
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