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Paul Joseph Dyson

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Publications associées (669)

In situ NMR characterisation of an intermediate in the catalytic hydrogenation of CO2 and HCO3– in aqueous solution

Gabor Laurenczy, Paul Joseph Dyson

The water soluble ruthenium(II) complex [RuCl2(PTA)([9]aneS3)] (PTA = 1,3,5-triaza-7-phosphadamantane, [9]aneS3 = 1,4,7-trithiacyclononane) catalyzes the hydrogenation of CO2 and bicarbonate in aqueous solution. ...

2007

Mechanistic Studies on the Formation of eta(2)-Diphosphine (eta(6)-p-cymene)ruthenium(II) Compounds

Gabor Laurenczy, Céline Fellay, Paul Joseph Dyson

A new range of pendent diphosphine (η6-p-cymene)ruthenium(II) complexes, [RuCl(PPh3)(η1-(P-P))(η6-p-cymene)]PF6 (P-P = dppm, cis-PPh2CHCHPPh2

2007

Development of nitrile-functionalized ionic liquids for C-C coupling reactions: implication of carbene and nanoparticle catalysts

Rosario Scopelliti, Paul Joseph Dyson, Dongbin Zhao, Zhaofu Fei, Wee Han Ang, Cinzia Chiappe

A series of nitrile-functionalized imidazolium salts (many of which are liquid at room temperature) have been prepared. The reactivity of these salts with PdCl2 has been studied, resulting in salts containing a tetrachloropalladate dianion or co ...

2007

Catalytic Activity of Bis-phosphine Ruthenium(II)-Arene Compounds: Chemoselective Hydrogenation and Mechanistic Insights

Paul Joseph Dyson

Bis-phosphine Ru(II)-arene complexes are highly active and chemoselective catalysts for the hydrogenation of aldehydes in the presence of olefinic bonds. Mechanistic studies, including comparisons with a structural analog, reactions of an isolated hydride ...

2007

Ionic-liquid-like copolymer stabilized nanocatalysts in ionic liquids: II. Rhodium-catalyzed hydrogenation of arenes

Paul Joseph Dyson, Ning Yan, Chenxu Zhao

Rhodium nanoparticles stabilized by the ionic-liq.-like copolymer N-Vinyl-2-pyrrolidone-1-vinyl-3-butylimidazolium chloride-1-vinyl-3-ethylimidazolium bromide copolymer were used to catalyze the hydrogenation of benzene and other arenes in ILs. The nanopar ...

2007

The Dielectric Response of Room-Temperature Ionic Liquids: Effect of Cation Variation

Corinne Daguenet, Paul Joseph Dyson

In continuation of recent work on the dielec. response of imidazolium-based ionic liqs. (ILs) (J. Phys. Chem. B, 2006, 110, 12682), the authors report on the effect of cation variation on the frequency-dependent dielec. permittivity up to 20 GHz of ionic l ...

2007

Structured fiber supports for ionic liquid-phase catalysis used in gas-phase continuous hydrogenation

Lioubov Kiwi, Gabor Laurenczy, Marina Ruta, Paul Joseph Dyson

Structured supported ionic liquid-phase (SSILP) catalysis is a new concept with the advantages of ionic liquids (ILs) used as solvents for homogeneous catalyst and the further benefits of structured heterogeneous catalysts. This is achieved by confining th ...

2007

Aqueous phase carbon dioxide and bicarbonate hydrogenation catalyzed by cyclopentadienyl ruthenium complexes

Gabor Laurenczy, Paul Joseph Dyson, Antoine Dorcier

The water-sol. ruthenium(II) complexes [Cp'RuX(PTA)2]Y and [CpRuCl(PPh3)(mPTA)]OTf (Cp' = Cp, Cp*, X = Cl and Y = nil; or X = MeCN and Y = PF6; PTA = 1,3,5-triaza-7-phosphaadamantane; mPTA = 1-methyl-1,3,5-triaza-7-phosphaadamantane) were used as catalyst ...

2007

Strategy To Tether Organometallic Ruthenium-Arene Anticancer Compounds to Recombinant Human Serum Albumin

Paul Joseph Dyson, Elisa Daldini, Wee Han Ang

In order to utilize macromols. for drug targeting and delivery, a strategy to tether organometallic ruthenium-arene drugs to carrier protein mols. was developed. The approach involves the design of a drug fragment capable of conjugating to linker mols. on ...

2007

On the influence of "arm-on, arm-off" processes on alkene hydrogenation catalysed by a rhodium triphos complex

Paul Joseph Dyson

The influence of phosphane "arm-on, arm-off" assocn./dissocn. in rhodium catalyzed alkene hydrogenation using [Rh(COD)(k3-triphos)]PF6 {1, COD = cyclooctadiene, triphos = 1,1,1-tris(diphenylphosphanylmethyl)ethane} has been investigated by comparison of th ...

2007

Investigation into the formation of heteronuclear clusters of formula [ Ru6C(CO)16Ag2X 2]2- (X = Cl, Br or I)

Rosario Scopelliti, Paul Joseph Dyson, Wee Han Ang

Reaction of [Ru6C(CO)16]2− with an excess of AgX (X = Cl, Br or I) affords heteronuclear clusters of formula [{Ru6C(CO)16Ag2X}2]2− in 80% yield, which for X = I and X = ...

2007

Facile, thermo-reversible cycloaddition of small molecules to a ruthenium(II) arene-diketiminate

Gabor Laurenczy, Rosario Scopelliti, Paul Joseph Dyson, Andrew Douglas Phillips

Formation of a vacant coordination site on a Ru center permits an unusual binding of small molecules such as ethylene, acetylene, and dihydrogen, resulting in the transformation of the chelating β-diketiminate ligand to a β-diimine. These represe ...

2007

Application of N,N-bis(diphenylphosphino)aniline palladium(II) complexes as pre-catalysts in Heck coupling reactions

Paul Joseph Dyson, Wee Han Ang

Palladium(II) complexes with N,N-bis(diphenylphosphino)aniline ligands catalyze the Heck reaction between styrene and aryl bromides, affording stilbenes in good yield. The structures of two of the complexes used as pre-catalysts have been detd. by single-c ...

2007

Thiocyanate functionalised ionic liquids: synthesis, characterisation and reactivity

Rosario Scopelliti, Paul Joseph Dyson, Dongbin Zhao, Zhaofu Fei, Wee Han Ang

The reaction of chloromethyl thiocyanate with 1-methylimidazole affords the imidazolium salt, 1-thiocyanomethyl-3-methylimidazolium chloride, [C1SCNmim]Cl (1a). Exchange of the chloride anion in 1a by [PF6] ...

2007

Development of Ruthenium Antitumor Drugs that Overcome Multidrug Resistance Mechanisms

Rosario Scopelliti, Paul Joseph Dyson, Claudine Scolaro, Wee Han Ang, Andrew Douglas Phillips, Gianni Sava

Organometallic ruthenium(II) complexes of the general formula [Ru(η6-p-cymene)Cl2(L)] and [Ru(η6-p-cymene)Cl(L)2][BPh4] with modified phenoxazine- and anthracene-based multidrug resistanc ...

2007

Remarkable Anticancer Activity of Triruthenium-Arene Clusters Compared to Tetraruthenium-Arene Clusters

Paul Joseph Dyson, Wee Han Ang

The in vitro activity of a series of ruthenium clusters, [(η6-C6H6)(η6-C6Me6)2Ru3(μ-H)3(μ3-O)][BF4], [(η6-C6H6)(η6-1,4-iPrC6H4Me)(η6-C6Me6)Ru3(μ-H)3(μ3-O)][BF4], [(η6-C6H6)4Ru4(μ-H)4][BF4]2, [(η6-C6H5Me)4Ru4(μ-H)4][BF4]2 and [(η6-C6H6)4Ru4(μ-H)3(μ-OH)][Cl] ...

Springer US2007

ESI-MS characterisation of protein adducts of anticancer ruthenium(II)-arene PTA (RAPTA) complexes

Paul Joseph Dyson, Wee Han Ang, Angela Casini

Electrospray ionization mass spectrometry allows a rapid characterization of the adducts formed between three novel anticancer ruthenium(II)-arene PTA compds. and horse heart cytochrome c or hen egg white lysozyme. Specific information on the nature of the ...

2007

Influence of the Interaction between Hydrogen Sulfide and Ionic Liquids on Solubility: Experimental and Theoretical Investigation

Gabor Laurenczy, Paul Joseph Dyson, Ana Vidis, Cinzia Chiappe

The soly. of H2S in a series of 1-butyl-3-methylimidazolium ([bmim]+) based ionic liqs. (ILs) with different anions, chloride, tetrafluoroborate ([BF4]-), hexafluorophosphate ([PF6]-), triflate ([TfO]-), and bis(trifluoromethyl)sulfonylimide ([Tf2N]-), and ...

2007

Organometallic ruthenium inhibitors of glutathione-S-transferase P1-1 as anticancer drugs

Paul Joseph Dyson, Wee Han Ang

Ruthenium-arene complexes conjugated to ethacrynic acid were prepared as part of a strategy to develop novel glutathione-S-transferase (GST) inhibitors with alternate modes of activity through the organometallic fragment, ultimately to provide targeted rut ...

Wiley-Blackwell2007

Revisiting Ether-Derivatized Imidazolium-Based Ionic Liquids

Rosario Scopelliti, Paul Joseph Dyson, Dongbin Zhao, Zhaofu Fei, Wee Han Ang

A series of ether-derivatized imidazolium halides have been prepd. and characterized. Contrary to literature reports, they are all cryst. solids and have m.ps. well above room temp. (50-100 °C). Single crystals of the imidazolium salts, obtained in situ by ...

2007

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