Browsing College of Science by Author "Farràs, Pau"
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Additive tuning redox potential in metallacarboranes by sequencial halogen substitution
González-Cardoso, Patricia; Stoica, Anca-Lulia; Farràs, Pau; Pepiol, Ariadna; Viñas, Clara; Teixidor, Francesc (Wiley, 2010-04-21)The first artificially made set of electron acceptors is presented that are derived from a unique platform Cs[3,3′-Co(C2B9H11)2], for which the redox potential of each differs from its predecessor by a fixed amount. The ... -
Bodipy-ruthenium(II) tris-bipyridyl dyads for homogeneous photochemical oxidations
Farràs, Pau; Benniston, Andrew C. (Elsevier, 2014-10-28)Two Bodipy-ruthenium(II) tris-bipyridyl dyads were synthesized for use as sensitizers in photochemical oxidation reactions of organic substrates. The synthetic strategy involved the use of a simple ‘click’ CuAAC reaction ... -
A Bpp-based dinuclear ruthenium photocatalyst for visible light-driven oxidation reactions
Hennessey, Seán; Farràs, Pau; Benet-Buchholz, Jordi; Llobet, Antoni (Royal Society of Chemistry, 2019-11-05)A diruthenium dyad molecule consisting of a 2,2-(1H-pyrazole-3,5-diyl)dipyridine (Hbpp) bridging ligand with the formula out-/in-[(bpy)2Ru(bpp)Ru(L)(tpy)]n+ (bpy = 2,2′-bipyridine, tpy = 2,2′:6′,2′′-terpyridine, L = Cl, ... -
Chemical, electrochemical and photochemical catalytic oxidation of water to dioxygen with mononuclear ru complexes
Roeser, Stephen; Farràs, Pau; Bozoglian, Fernando; Martínez, Marta; Benet-Buchholz, Jordi; Llobet, Antoni (Wiley, 2011-01-27)Four new RuII[BOND]Cl and RuII[BOND]H2O complexes containing the meridional 2,2’:6’,2”-terpyridine (trpy) ligand and the chelating 2-(5-phenyl-1H-pyrazol-3-yl)pyridine (H3p) ligand of general formula in- and out-[RuII(tr ... -
Controlling the pirouetting motion in rotaxanes by counterion exchange
Farràs, Pau; Escudero-Adán, Eduardo C.; Viñas, Clara; Teixidor, Francesc (American Chemical Society, 2014-07-25)A fine control of the pirouetting motion of rotaxanes was achieved by using a series of metallabisdicarbollides. The latter were used as anions in the protonated form of benzylic amide macrocycle-containing fumaramide ... -
A convenient synthetic route to useful monobranched polyethoxylated halogen terminated [3,3 -Co(1,2-C2B9H11)2]- synthons
Farràs, Pau; Teixidor, Francesc; Sillanpää, Reijo; Viñas, Clara (Royal Society of Chemistry, 2009-11-15)An atom efficient and environmentally friendly route has been developed to obtain a new range of reagents in metallacarborane chemistry having monobranched polyethoxylated cobaltabisdicarbollide synthons. -
A discrete P⋅⋅⋅I I⋅⋅⋅P assembly: the large influence of weak interactions on the 31P NMR Spectra of Phosphane–Diiodine Complexes
Nuñez, Rosario; Farràs, Pau; Teixidor, Francesc; Viñas, Clara; Sillanpää, Reijo; Kivekäs, Raikko (Wiley, 2006-02-06)Seeing I to I: The reaction of a weakly coordinating carboranyl phosphane ligand with I2 leads to the formation of an adduct containing the bridging P⋅⋅⋅I[BOND]I⋅⋅⋅P assembly in the solid state (see picture; I purple, P ... -
Electrolysis of low-grade and saline surface water
Tong, Wenming; Forster, Mark; Dionigi, Fabio; Dresp, Sören; Sadeghi Erami, Roghayeh; Strasser, Peter; Cowan, Alexander J.; Farràs, Pau (Nature Research (part of Springer Nature), 2020-02-17)Review Article Published: 17 February 2020 Electrolysis of low-grade and saline surface water Wenming Tong, Mark Forster, Fabio Dionigi, Sören Dresp, Roghayeh Sadeghi Erami, Peter Strasser, Alexander J. Cowan & Pau ... -
Enhanced photostability of a Ruthenium(II) Polypyridyl Complex under highly oxidizing aqueous conditions by its partial inclusion into a cyclodextrin
Farràs, Pau; Waller, Helen; Benniston, Andrew C. (Wiley, 2016-01-08)The complex [Ru(bpy)2L]2+, where bpy=2,2′-bipyridine, L=4-(phenylethynyl)-2,2′-bipyridine, was prepared in its racemic and resolved forms (Δ and Λ). The phenylethynyl unit on the bipyridine for the complex acts as a binding ... -
From icosahedron to a plane flattening dodecaiodo-dodecaborate by successive stripping of iodine
Farràs, Pau; Vankova, Nina; Zeonjuk, Lei Liu; Warneke, Jonas; Dülcks, Thomas; Heine, Thomas; Viñas, Clara; Teixidor, Francesc; Gabel, Detlef (Wiley, 2012-09-07)It has been shown by electrospray ionization–ion-trap mass spectrometry that B12I122− converts to an intact B12 cluster as a result of successive stripping of single iodine radicals or ions. Herein, the structure and ... -
H2 generation and sulfide to sulfoxide oxidation in H2O using sunlight with a model photoelectrosynthesis cell
Farràs, Pau; Di Giovanni, Carlo; Clifford, John Noel; Palomares, Emilio; Llobet, Antoni (Elsevier, 2014-10-28)A summary of the recent advances in homogeneous light-driven catalytic oxidation reactions is provided either using sacrificial agents or with complete functional cells. In this work, a photoelectrosynthesis model cell ... -
Light driven styrene epoxidation and hydrogen generation using H2O as an oxygen source in a photoelectrosynthesis cell
Farràs, Pau; Di Giovanni, C.; Clifford, J. N.; Garrido-Barros, P.; Palomares, E.; Llobet, Antoni (Royal Society of Chemistry, 2015-10-02)A dye-sensitized photoelectrosynthesis cell (DSPEC) has been prepared for the oxidation of alkenes to epoxides and evolution of hydrogen using water as an oxygen source and sunlight. A Ru oxidation catalyst, 2,2+ , is ... -
Metallacarboranes and their interactions: theoretical insights and their applicability
Farràs, Pau; Juárez-Pérez, Emilio J.; Lepšík, Martin; Luque, Rafael; Núñez, Rosario; Teixidor, Francesc (Royal Society of Chemistry, 2012-02-14)This tutorial review will deal with the study of metallacarboranes and their interactions with other molecules from a theoretical point of view. This contribution is devoted to guide experimental chemists through calculations ... -
Metallacarboranes as building blocks for polyanionic polyarmed aryl-ether materials
Farràs, Pau; Teixidor, Francesc; Kivekäs, Raikko; Sillanpää, Reijo; Viñas, Clara; Grüner, Bohumir; Cisarova, Ivana (American Chemical Society, 2008-09-20)Polyanionic species have been obtained in high yield by a new route in the ring-opening reaction of cyclic oxonium [3,3′-Co(8-C4H8O2-1,2-C2B9H10)(1′,2′-C2B9H11)] (2) by using carboxylic acids, Grignard reagents, and ... -
Microbial electrosynthesis: Towards sustainable biorefineries for production of green chemicals from CO2 emissions
Dessì, Paolo; Rovira-Alsina, Laura; Sánchez, Carlos; Dinesh, G. Kumaravel; Tong, Wenming; Chatterjee, Pritha; edesco, MicheleT; Farràs, Pau; Hamelers, Hubertus M.V.; Puig, Sebastià (Elsevier, 2020-12-01)Decarbonisation of the economy has become a priority at the global level, and the resulting legislative pressure is pushing the chemical and energy industries away from fossil fuels. Microbial electrosynthesis (MES) has ... -
Prediction of pK(a) values of nido-carboranes by density functional theory methods
Farràs, Pau; Teixidor, Francesc; Branchadell, Vicenç (American Chemical Society, 2006-08-25)A great parallel exists between metal complexes of cyclopentadienyl and arene ligands on one side and metal complexes of the nido derivatives of the icosahedral o-carborane clusters. With few exceptions, the metal complexation ... -
Recent advances in artificial photosynthetic systems at Newcastle University
Farràs, Pau; Cucinotta, Fabio (Elsevier, 2016-04-08)This review covers the most significant research done by the group of scientists working at Newcastle University during the last five years in the area of artificial photosynthesis. In particular, it tackles the aspects ... -
Relaxed but highly compact diansa metallacyclophanes
Farràs, Pau; Teixidor, Francesc; Rojo, Isabel; Kivekäs, Raikko; Sillanpää, Reijo; González-Cardoso, Paul V.; Viñas, Clara (American Chemical Society, 2011-09-09)A series of monoansa [μ-1,1′-PR-3,3′-Co(1,2-C2B9H10)2]− and diansa [8,8′-μ-(1″,2″-benzene)-μ-1,1′-PR-3,3′-Co(1,2-C2B9H9)2]− (R = Ph, tBu) cobaltabisdicarbollidephanes have been synthesized, characterized and studied by ... -
Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water
Viñas, Clara; Tarrés, Màrius; González-Cardoso, Patricia; Farràs, Pau; Bauduin, Pierre; Teixidor, Francesc (Royal Society of Chemistry, 2013-11-21)[3,3′-Co(1,2-C2B9H11)2]−, [1]−, and its chloroderivatives have been described as displaying surfactant/aggregation properties. We have studied their behaviour as electrolytes in the water electrolysis process. The electrolysis ... -
Syntheses of C-substituted icosahedral dicarbaboranes bearing the 8-dioxane-cobalt bisdicarbollide moiety
Šícha, Václav; Farràs, Pau; Štíbr, Bohumil; Teixidor, Francesc; Grüner, Bohumir; Viñas, Clara (Elsevier, 2009-11-20)The treatment of 1,2-, 1,7- and 1,12-carbaborane lithiated isomers with [3,3′-Co-8-(CH2CH2O)2-(1,2-C2B9H10)-(1′,2′-C2B9H11)] (1) at molar ratios 1:1 or 1:2 at room temperature in THF leads generally to the formation of a ...