A5024124133- Mass Spectrometry Techniques and Applications
- Analytical chemistry methods development
- Analytical Chemistry and Chromatography
- Organic Electronics and Photovoltaics
- Catalytic Processes in Materials Science
- Ion-surface interactions and analysis
- Porphyrin and Phthalocyanine Chemistry
- Conducting polymers and applications
- Vehicle emissions and performance
- Carbon dioxide utilization in catalysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Catalyzed Oxygenation Mechanisms
- Catalysis and Oxidation Reactions
- Glycosylation and Glycoproteins Research
- Perovskite Materials and Applications
- Advanced Combustion Engine Technologies
- Organic Light-Emitting Diodes Research
- Surface Chemistry and Catalysis
- Enzyme Catalysis and Immobilization
- biodegradable polymer synthesis and properties
- Fullerene Chemistry and Applications
- Nanoparticles: synthesis and applications
- Industrial Gas Emission Control
- Photodynamic Therapy Research Studies
Swansea University
2011-2022
Engineering and Physical Sciences Research Council
2006-2019
University of Wales
2005-2006
Chinese Academy of Sciences
2006
Changchun Institute of Applied Chemistry
2006
University of Nottingham
2006
Eindhoven University of Technology
2006
University of Liverpool
2006
National Institute for Biotechnology and Genetic Engineering
2006
Johnson Matthey (United States)
1982-1993
A comparison of the efficiency, stability, and photophysics organic solar cells employing poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3'″-di(2-octyldodecyl)-2,2';5',2″;5″,2'″-quaterthiophen-5,5'″-diyl)] (PffBT4T-2OD) as a donor polymer blended with either nonfullerene acceptor EH-IDTBR or fullerene derivative, [6,6]-phenyl C71 butyric acid methyl ester (PC71 BM) electron acceptors is reported. Inverted PffBT4T-2OD:EH-IDTBR blend cell fabricated without any processing additive...
A new methodology is described for the one-step aqueous preparation of highly monodisperse gold nanoparticles with diameters below 5 nm using thioether- and thiol-functionalized polymer ligands. The particle size distribution was controlled by subtle variation structure. It shown that poly(acrylic acid) (PAA) poly(methacrylic (PMAA) were most effective stabilizing polymers in group studied relatively low molar mass ligands (approximately 2500 g/mol) gave rise to narrowest distributions....
Environmental stability is a common challenge for the commercialisation of low cost, encapsulation-free organic opto-electronic devices.
Abstract Nonfullerene acceptors (NFAs) dominate organic photovoltaic (OPV) research due to their promising efficiencies and stabilities. However, there is very little investigation into the molecular processes of degradation, which critical guiding design novel NFAs for long‐lived, commercially viable OPVs. Here, important role structure conformation in NFA photostability air investigated by comparing structurally similar but conformationally different NFAs: planar O‐IDTBR nonplanar O‐IDFBR....
With the emergence of nonfullerene electron acceptors resulting in further breakthroughs performance organic solar cells, there is now an urgent need to understand their degradation mechanisms order improve intrinsic stability through better material design. In this study, we present quantitative evidence for a common root cause light-induced polymer:nonfullerene and polymer:fullerene cells air, namely, fast photo-oxidation process photoactive materials mediated by formation superoxide...
Despite being a critical molecule in the brain, mass spectrometry imaging (MSI) of cholesterol has been under-reported compared to other lipids due difficulty ionizing sterol molecule. In present work, we have employed an on-tissue enzyme-assisted derivatization strategy improve detection brain tissue sections. We report distribution and levels across specific structures mouse model Niemann-Pick type C1 disease, during development. MSI revealed that adult mouse, is highest pons medulla how...
The kinetics of enzymatic ring-opening polymerization (eROP) ε-caprolactone in supercritical carbon dioxide (scCO2) was investigated using a new, high-pressure sampling autoclave. performed Candida antarctica lipase B (CALB) as catalyst and found to be approximately first order with respect monomer up 80% conversion. For the time we have been able present kinetic results on eROP caprolactone scCO2. These show that high molecular weight polymer could obtained (up 50 kDa) polydispersities...
2-[(2E)-3-(4-tert-Butylphenyl)-2-methylprop-2-enylidene]malononitrile (DCTB) is a nonpolar, aprotic matrix and was used in the analysis of variety compounds by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS). The classes include coordination compounds, organometallics, conjugated organic (including porphyrins phthalocyanines), carbohydrates, calixarenes, macrocycles. For some samples, comparisons are made with spectra acquired use...
Enzymatic ring-opening polymerization (eROP) of ε-caprolactone (ε-CL) and atom-transfer radical (ATRP) methyl methacrylate (MMA) were integrated into a one-step chemoenzymatic route to yield poly(ε-CL-block-MMA) (PCL-b-PMMA) in supercritical carbon dioxide (scCO2). The interaction between eROP ATRP during the copolymerization was studied: Cu(I)Br/bpy as catalyst compatible with eROP, while Ni(PPh)3Br2 inhibited enzyme activity; under reaction conditions, both ε-CL PCL improved solubility...
The 2-phosphinophosphinine 2-PPh2-3-Me-6-SiMe3-PC5H2 (2) has been prepared and was shown to act as a κ2-chelating ligand in cis-[RuCl2(2)2] (4). Complex 4 competent precatalyst for the room temperature transfer hydrogenation of acetophenone (0.1 mol% 0.5 KOtBu) conversion methanol/ethanol mixtures advanced biofuel isobutanol 50% yield 96% selectivity.
Nanostructure-assisted laser desorption/ionization time-of-flight mass spectrometry (NALDI-TOFMS) has been developed recently as a matrix-free/surface-assisted alternative to matrix-assisted (MALDI-TOFMS). The NALDI surface of silicon nanowires is already very effective for the analysis small medium sized, polar organic molecules in positive ion mode. current study examined this technology several nonpolar organic, organometallic, and ionic compounds mode, well fluorinated compound various...
A norbornenyl-based homopolymer that has a dendronised iridium(III) complex attached to every monomer unit been synthesized. The is comprised of three facially arranged 2-phenylpyridyl ligands. Two the ligands bear first generation biphenyl-based dendrons with 2-ethylhexyloxy surface groups and third ligand polymer backbone via benzyloxy ester. was formed by ring opening metathesis using Grubbs III catalyst found have an Mp 130 kDa MALDI-TOF mass spectrometry. At concentration 25 mg cm−3...
Abstract Transition‐metal acetylacetonate complexes of the form Metal(acac) 2 , where Metal = Fe(II), Co(II), Ni(II), Cu(II), and Zn(II), 3 V(III), Cr(III), Mn(III), Fe(III), Co(III), were investigated by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOFMS). The data was acquired using aprotic, electron transfer matrix, 2‐[(2 E )‐3‐(4‐ tert ‐butylphenyl)‐2‐methylprop‐2‐enylidene]malononitrile (DCTB), observation positive radical ions is shown clearly to...
An investigation of various solvent-free matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) sample preparation methods for the characterization organometallic and coordination compounds is described. Such are desirable insoluble materials, that only soluble in disadvantageous solvents, or complexes dissociate solution, all which present a major "difficulty" to most techniques. First-row transition metal acetylacetonate complexes, have been...
Halogenated volatile organic compounds are associated with a broad range of industrial processes, but when discharged into the atmosphere they constitute major source air pollution. Recognition potentially damaging effects that these emissions can have on environment is leading to increasing demands for their control. Catalytic combustion appears offer advantages over thermal destruction, resulting from lower incineration temperatures and higher destructive efficiencies. While platinum...
We evaluated several aqueous-based sample preparation protocols for the analysis of poly(methacrylic acid) (PMAA) by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS). The contained a pentaerythritol tetra(3-mercaptopropionate) end-group, and was characterized in positive negative ion modes using 2,5-dihydroxybenzoic acid (DHB) 2,4,6-trihydroxyacetophenone (THAP) matrices. major series observed were [M + Na]+ species, mode, − H]− mode. performance DHB...
A convergent synthesis of a first generation dendrimer with biphenyl-based dendrons and hexaphenylbenzene core is reported. Suzuki coupling six biphenyl-dendrons the rigid hexakis(4-iodophenyl)benzene furnished title asterisk-cored in 60% yield. Twelve copies β-(1→6)-linked glucosamine-based oligosaccharides were then efficiently coupled acetylenyl surface groups via Huisgen 1,3-dipolar cycloaddition reaction to give series multivalent carbohydrate constructs that mimic globular nodules...
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) has been shown to be an effective technique for the characterization of organometallic, coordination, and highly conjugated compounds. The preferred matrix is 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene]malononitrile (DCTB), with radical ions observed. However, MALDI-TOFMS generally not favored accurate measurement. A specific method had developed such compounds assure quality our results....
Molten carbonate fuel cells have the potential to succeed phosphoric acid as systems for large scale electrical power generation. Their introduction, however, will depend on wide acceptance of first generation technology and solutions being found a number significant technical problems, including corrosion cell components by molten electrolyte. Ruthenium, rhodium, palladium, platinum, silver gold all been shown exhibit resistance carbonates under conditions experienced at anode cell. In...
Insoluble or low solubility organometallic and coordination compounds have been characterised by matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry, with solvent-free sample preparation being the key step toward successful analysis.