A5020312033- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organometallic Complex Synthesis and Catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Asymmetric Hydrogenation and Catalysis
- Lanthanide and Transition Metal Complexes
- Chemical Synthesis and Reactions
- CO2 Reduction Techniques and Catalysts
- Chemical Synthesis and Analysis
- Crystallography and molecular interactions
- Supercapacitor Materials and Fabrication
- Carbon dioxide utilization in catalysis
- Environmental Education and Sustainability
- Polyoxometalates: Synthesis and Applications
- Climate Change Communication and Perception
- Nanomaterials for catalytic reactions
- Vanadium and Halogenation Chemistry
- Conducting polymers and applications
- Synthesis and characterization of novel inorganic/organometallic compounds
- Organometallic Compounds Synthesis and Characterization
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Coordination Chemistry and Organometallics
- Advanced Synthetic Organic Chemistry
- Carbon Dioxide Capture Technologies
Energy Safety Research Institute
2018-2020
Swansea University
2018-2020
University of British Columbia
2015-2017
University of Bath
2013-2016
University of Canterbury
2014
Syngenta (United Kingdom)
2013
A strategy to modulate the electrocatalytic activity of copper toward CO2 reduction involving adsorption acrylamide, acrylic acid, and allylamine polymers is presented. Modification electrodeposited foam with poly(acrylamide) leads a significant enhancement in faradaic efficiency for ethylene from 13% (unmodified foam) 26% at −0.96 V vs RHE, whereas methane yield unaffected. Effects crystalline phase distribution oxide phases are ruled out as source through XPS situ XRD analysis. DFT...
Post-synthetic ligand exchange in the prototypical zirconium-based metal-organic framework (MOF) UiO-66 was investigated by situ solution 1 H NMR spectroscopy. Samples of having different degrees defectivity were exchanged using solutions several terephthalic acid analogues a range conditions. Linker only occurred defect-free UiO-66, whereas monocarboxylates grafted at defect sites found to be preferentially with respect over whole conditions investigated. A 1:1 ratio between analogue and...
Optimizing sorption capacity and amine efficiency are among the major challenges in developing solid carbon dioxide sorbents. Such materials frequently feature polyamines impregnated onto supports adding weight to This work presents cross-linking of polyethyleneimine (PEI) by industrially available epoxy resin, bisphenol-A diglycidyl ether (DER) form support-free sorbent materials. Prior cross-linking, polyamine chain is functionalized with hydrophobic additives; one material modified...
Acid chlorides can be activated using a simple iodide source to undergo nucleophilic attack from variety of relatively weak nucleophiles. These include Friedel-Crafts acylation N-methylpyrroles, N-acylation sulfonamides, and reactions hindered phenol derivatives. The reaction is believed proceed through transient acid intermediate.
Abstract cis ‐1,4‐Butenediol is shown to be a highly active hydrogen source for asymmetric transfer hydrogenation in the reduction of ketones. With use ruthenium catalyst, ‐1,4‐butenediol isomerised and subsequently oxidised lactone as an irreversible step, which provides driving force
Sequential treatment at low temperatures of Cp*W(NO)Cl2 in THF with 1 equiv a binary magnesium allyl reagent, followed by an excess LiBH4, affords three new Cp*W(NO)(H)(η3-allyl) complexes, namely, Cp*W(NO)(H)(η3-CH2CHCMe2) (1), Cp*W(NO)(H)(η3-CH2CHCHPh) (2), and Cp*W(NO)(H)(η3-CH2CHCHMe) (3). Complexes 1–3 are isolable as air-stable, analytically pure yellow solids good to moderate yields chromatography or fractional crystallization. In solutions, complex exists two coordination isomers...
The thermal properties of Cp*W(NO)(H)(η3-CH2CHCMe2) (1), Cp*W(NO)(H)(η3-CH2CHCHPh) (2), and Cp*W(NO)(H)(η3-CH2CHCHMe) (3) (Cp* = η5-C5Me5) have been investigated. Thermolyses 1–3 in n-pentane lead to the loss original allyl ligand formation same mixture isomeric products, namely, Cp*W(NO)(H)(η3-CH2CHCHEt) (4a) Cp*W(NO)(H)(η3-MeCHCHCHMe) (4b) their coordination isomers. Similarly, 1 reacts with cyclohexane n-heptane form Cp*W(NO)(H)(η3-C6H9) isomers Cp*W(NO)(H)(η3-C7H13), respectively. It is...
Cp*W(NO)(CH2CMe3)(η3-CH2CHCHPh) (1) effects C(sp3)–H activations of methane, ethane, propane, and n-butane exclusively at their terminal carbons forms the corresponding Cp*W(NO)(alkyl)(η3-CH2CHCHPh) complexes. It also activates (n-Bu)2O, 1-chloropropane, Me4Si in a similar manner. Exposure complexes to carbon monoxide results initial 1,1-CO insertion into newly formed tungsten–alkyl bonds formation η1-acyl complexes, some which can be isolated. Additional functionalization C–H activation...
Treatment of CH2Cl2 solutions Cp*M(NO)Cl2 (Cp* = η5-C5(CH3)5; M Mo, W) first with 2 equiv AgSbF6 in the presence PhCN and then 1 Ph2PCH2CH2PPh2 affords yellow-orange salts [Cp*M(NO)(PhCN)(κ2-Ph2PCH2CH2PPh2)](SbF6)2 good yields (M W). Reduction Cp2Co C6H6 at 80 °C produces corresponding 18e neutral compounds, Cp*M(NO)(κ2-Ph2PCH2CH2PPh2) which have been isolated as analytically pure orange-red solids. The addition Lewis acid, Sc(OTf)3, to room temperature results immediate formation thermally...
C–H activations of a C(sp2)–H bond in benzene or C(sp3)–H mesitylene at 80 °C under CO pressure undried solvents without rigorous exclusion air and moisture can be effected with the 18e complexes Cp*W(NO)(H)(η3-CH2CHCMe2) (1), Cp*W(NO)(H)(η3-CH2CHCHMe) (2), Cp*W(NO)(H)(η3-CH2CHCHPh) (3) (Cp* = η5-C5Me5). These are regiospecific afford case complex 1 good yields unsymmetrical saturated ketones 4-methyl-1-phenylpentan-1-one (5) 1-(3,5-dimethylphenyl)-5-methylhexan-2-one (8), respectively,...
The complexes trans-Cp*W(NO)(CH2CMe3)(H)(L) (Cp* = η5-C5Me5) result from the treatment of Cp*W(NO)(CH2CMe3)2 in n-pentane with H2 (∼1 atm) presence a Lewis base, L. designation particular geometrical isomer as cis or trans indicates relative positions alkyl and hydrido ligands base four-legged piano-stool molecular structure. thermal behavior these is markedly dependent on nature Some them can be isolated at ambient temperatures [e.g., L P(OMe)3, P(OPh)3, P(OCH2)3CMe]. Others undergo...
Abstract Post‐synthetic ligand exchange in the prototypical zirconium‐based metal–organic framework (MOF) UiO‐66 was investigated by situ solution 1 H NMR spectroscopy. Samples of having different degrees defectivity were exchanged using solutions several terephthalic acid analogues a range conditions. Linker only occurred defect‐free UiO‐66, whereas monocarboxylates grafted at defect sites found to be preferentially with respect over whole conditions investigated. A 1:1 ratio between...
Abstract The application of cis‐1,4‐butenediol as a hydrogen source for the asymmetric transfer hydrogenation ketones (I) and (III) is reported.
Abstract Acid chlorides can be activated by using simple iodide sources, e.g., KI or LiI, to undergo nucleophilic attack a variety of relatively weak nucleophiles.
Post-synthetic ligand exchange is a valuable synthetic tool for functionalisation of zirconium-based metal-organic frameworks. It generally assumed that the involves organic linkers, however these materials are known to contain large amounts defects, which likely play role during process. This can eventually lead unexpected effects on physical-chemical properties material. in prototypical framework UiO-66 was investigated by situ solution nuclear magnetic resonance. Samples prepared either...