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Ara mostrant els elements 1-17 d 17
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A Y-Shaped tris-N-heterocyclic carbene for the synthesis of simultaneously chelate-monodentate dipalladium complexes
Peris, Eduardo; Gonell, Sergio; Mata Martínez, Jose A; Poyatos, Macarena American Chemical Society (2011-11)A Y-shaped tris-NHC ligand has been obtained and coordinated to palladium, affording metal complexes with novel topological properties. The tris-NHC ligand is capable of coordinating the two metals, affording two different ... -
Accessing and Photo-Accelerating Low-Overpotential Pathways for CO2 Reduction: A Bis-Carbene Ruthenium Terpyridine Catalyst
Assaf, Eric A.; Gonell, Sergio; Chen, Chun-Hsing; Miller, Alexander American Chemical Society (2022-10-21)A ruthenium catalyst bearing a bidentate bis(carbene) ligand is prepared and studied as a catalyst for CO2 electroreduction. The catalyst [Ru(tpy)(bis-mim)(MeCN)][PF6]2 (tpy) is 2,2′,:6′,2″-terpyridine; bis-mim is ... -
An Iron Bis(carbene) Catalyst for Low Overpotential CO2 Electroreduction to CO: Mechanistic Insights from Kinetic Zone Diagrams, Spectroscopy, and Theory
Gonell, Sergio; Assaf, Eric A.; Lloret Fillol, Julio; Miller, Alexander American Chemical Society (2021-12-08)A common challenge in molecular electrocatalysis is the relationship between maximum activity and the overpotential required to reach that rate, with faster catalysts incurring higher overpotentials. This work follows a ... -
An Iron Pyridyl-Carbene Electrocatalyst for Low Overpotential CO2 Reduction to CO
Gonell, Sergio; Lloret Fillol, Julio; Miller, Alexander American Chemical Society (2021-04-15)Electrocatalysts for CO2 reduction based on first-row transition metal ions have attracted attention as abundant and affordable candidates for energy conversion applications. Yet very few molecular iron electrocatalysts ... -
Aplicació de rúbriques per a l'avaluació d'estudiants en grups de treball de laboratori químic
Gonell, Francisco; Gonell, Sergio; Julian-Lopez, Beatriz; Mata Martínez, Jose A Universitat de Barcelona (2016)El present treball de millora educativa constitueix un exemple de millora en les pràctiques de laboratori de l’assignatura QU0924 Química Inorgànica III mitjançant la introducció de rúbriques com a instrument d’avaluaci ... -
Imidazolidines as hydride sources for the formation of late transition-metal monohydrides
Poyatos, Macarena; Prades Ferrer, Amparo; Gonell, Sergio; Gusev, Dmitry; Peris, Eduardo Royal Society of Chemistry (2012)The reaction of a series of imidazolidines with chloro-complexes of Ir, Rh and Ru affords the clean generation of the corresponding monohydrido metal species. Computational analysis of the reduction process suggests that ... -
Main-Chain Organometallic Microporous Polymers Bearing Triphenylene–Tris(N-Heterocyclic Carbene)–Gold Species: Catalytic Properties
Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo WILEY-VCH Verlag GmbH & Co. KGaA (2014-05)Two triphenylene-based tris(N-heterocyclic carbene)–gold–acetylide main-chain organometallic microporous polymers (MOMPs) were obtained and fully characterized. Both materials show spherical shapes, and their size is highly ... -
Pincer-CNC mononuclear, dinuclear and heterodinuclear Au(III) and Pt(II) complexes supported by mono- and poly-N-heterocyclic carbenes: synthesis and photophysical properties
Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo Royal Society of Chemistry (2016)A family of cyclometallated Au(III) and Pt(II) complexes containing a CNC-pincer ligand (CNC = 2,6-diphenylpyridine) supported by pyrene-based mono- or bis-NHC ligands have been synthesized and characterized, together ... -
Platinum-Based Organometallic Folders for the Recognition of Electron-Deficient Aromatic Substrates
Nuevo Vialás, Daniel; Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo Wiley (2017-05-29)A series of platinum complexes with cis-oriented polyaromatic N-heterocyclic carbene ligands were prepared and characterized. The relative disposition of the polyaromatic ligands about the metal cause these compounds to ... -
Pyrene-Based Bisazolium Salts: From Luminescence Properties to Janus-Type Bis-N-Heterocyclic Carbenes
Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo WILEY-VCH Verlag GmbH & Co. KGaA (2014-07)A series of pyrene-based bisazolium salts have been obtained starting from 4,5,9,10-tetrabromo-2,7-di-tert-butylpyrene. The synthetic procedure to the pyrene-bisazoliums (PBIs) reveals an unexpected behavior, as a consequence ... -
Pyrene-Based Mono- and Di-N-Heterocyclic Carbene Ligand Complexes of Ruthenium for the Preparation of Mixed Arylated/Alkylated Arylpyridines
Gonell, Sergio; Peris, Eduardo ACS Publications (2014-07-15)By using two pyrene-based mono- and di-N-heterocyclic carbene ligands, two ruthenium complexes (one monometallic and the other dimetallic) have been obtained and fully characterized. The molecular structure of the dimetallic ... -
Redox-Switchable Cycloisomerization of Alkynoic Acids with Napthalenediimide-Derived N-Heterocyclic Carbene Complexes
Ruiz Zambrana, César Luís; Gutiérrez-Blanco, Ana; Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo Wiley (2021-09-01)Two naphthalene-diimide (NDI) bis-imidazolium salts have been used as N-heterocyclic carbene (NHC) precursors for the preparation of NDI-functionalized complexes of rhodium and iridium of general formula [MCl(NDI-NHC)(COD)] ... -
Self-assembled M12L24 nanospheres as a reaction vessel to facilitate a dinuclear Cu(i) catalyzed cyclization reaction
Gonell, Sergio; Caumes, Xavier; Orth, Nicole; Ivanovic-Burmazovic, Ivana; Reek, Joost Royal Society of Chemistry (2019)The application of large M12L24 nanospheres allows the pre-concentration of catalysts to reach high local concentrations, facilitating reactions that proceed through dinuclear mechanisms. The mechanism of the copper(I)-catalyzed ... -
Structural Features of Mono- and Dimetallic Complexes of Palladium Combining Two Types of Aromatic NHC Ligands
Gonell, Sergio; Peris, Eduardo; Poyatos, Macarena ChemPubSoc Europe (2019-09-08)A family of palladium complexes that combine two types of aromatic N‐heterocyclic carbene (NHC) ligands has been prepared starting from dinuclear palladium complexes. Two of the complexes are mono‐metallic and contain a ... -
Triphenylene-Based Tris(N-Heterocyclic Carbene) Ligand: Unexpected Catalytic Benefits
Gonell, Sergio; Poyatos, Macarena; Peris, Eduardo Wiley (2013-07-01)Triple play: A novel triphenylene-based tris(N-heterocyclic carbene) ligand with D3h symmetry and a highly π-delocalized system has been prepared and coordinated to palladium and gold (see figure). The catalytic activities ... -
Unveiling the stereoelectronic properties of a triphenylene-based tris N-heterocyclic carbene
Gonell, Sergio; Alabau, Roberto G.; Poyatos, Macarena; Peris, Eduardo Royal Society of Chemistry (2013-06-14)Two rhodium complexes with a triphenylene-based tris-NHC have been fully characterized. DFT and electrochemical studies suggest that the electronic communication between the metals is very weak, and that the electron ... -
Y-Shaped Tris-N-Heterocyclic-Carbene Ligand for the Preparation of Multifunctional Catalysts of Iridium, Rhodium, and Palladium
Gonell, Sergio; Poyatos, Macarena; Mata Martínez, Jose A; Peris, Eduardo American Chemical Society (2012)A series of homo- and hetero-dimetallic complexes of Ir, Rh, and Pd have been obtained using our previously reported Y-shaped tris-NHC ligand. The new complexes can be obtained through the isolation of the corresponding ...