A5028084471- Magnetism in coordination complexes
- Molecular Junctions and Nanostructures
- Chalcogenide Semiconductor Thin Films
- Porphyrin and Phthalocyanine Chemistry
- Electron and X-Ray Spectroscopy Techniques
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum Dots Synthesis And Properties
- X-ray Spectroscopy and Fluorescence Analysis
- Heavy metals in environment
- Metal-Organic Frameworks: Synthesis and Applications
- Water Treatment and Disinfection
- Fuel Cells and Related Materials
- Heavy Metal Exposure and Toxicity
- Lanthanide and Transition Metal Complexes
- Surface Chemistry and Catalysis
- Tuberculosis Research and Epidemiology
- Electrochemical Analysis and Applications
- Mercury impact and mitigation studies
- Geochemistry and Elemental Analysis
- TiO2 Photocatalysis and Solar Cells
- Mycobacterium research and diagnosis
- Crystallography and molecular interactions
- Photochromic and Fluorescence Chemistry
- Environmental Justice and Health Disparities
University of Cambridge
2024
University of Leeds
2020-2024
Bon Secours Mercy Health
2020
St. Vincent Hospital
2020
St Vincent Medical Center
2020
St Vincent Hospital
2020
Freie Universität Berlin
2017-2019
Canadian Nuclear Laboratories
2015
Mercy St. Vincent Medical Center
2011-2012
University of Nottingham
2010-2012
Abstract Cooperative effects determine the spin-state bistability of spin-crossover molecules (SCMs). Herein, ultimate scale limit at which cooperative spin switching becomes effective is investigated in a complex [Fe(H 2 B(pz) ) (bipy)] deposited on highly oriented pyrolytic graphite surface, using x-ray absorption spectroscopy. This system exhibits complete thermal- and light-induced transition thicknesses ranging from submonolayers to multilayers. On increasing coverage 0.35(4) 10(1)...
I-V-VI2 ternary chalcogenides are gaining attention as earth-abundant, nontoxic, and air-stable absorbers for photovoltaic applications. However, the semiconductors explored thus far have slowly-rising absorption onsets, their charge-carrier transport is not well understood yet. Herein, we investigate cation-disordered NaBiS2 nanocrystals, which a steep onset, with coefficients reaching >105 cm-1 just above its pseudo-direct bandgap of 1.4 eV. Surprisingly, also observe an ultrafast...
Abstract Ternary chalcogenides have emerged as potential candidates for ultrathin photovoltaics, and NaBiS 2 nanocrystals (NCs) gained appeal because of their months‐long phase‐stability in air, high absorption coefficients >10 5 cm −1 , a pseudo‐direct bandgap 1.4 eV. However, previous investigations into NCs used long‐chain organic ligands separating individual during synthesis, which severely limits macroscopic charge‐carrier transport. In this work, these are exchanged short...
Molecular worms: Porphyrin polymers and oligomers are deposited on a Au(111) surface using electrospray deposition shown to adopt an arrangement where chains from neighboring molecules interdigitated. Although the flexible nature of gives rise sharp kinks crossing polymer strands (see scheme), longer correlation length as compared with solvated is observed. Detailed facts importance specialist readers published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...
For probing the nature of spin-state switching in spin-crossover molecules adsorbed on surfaces, x-ray absorption spectroscopy has emerged as a powerful tool due to its high sensitivity and element selectivity tracing even subtle electronic, magnetic, or chemical changes. However, x-rays itself can induce spin transition might have unwanted influence while investigating effect other stimuli such temperature light, surface, behaviour. Herein, we present an Fe(II) complex highly oriented...
X-ray photoelectron spectroscopy (XPS) has emerged as a technique that allows for characterization and classification of hydrogen bonding proton transfer interactions in organic crystal structures, way is complementary to crystallography by or neutron diffraction. Here, we analyze the nitrogen 1s core-level binding energies (BEs) isonicotinamide (IN) systems with between donor acceptor groups at short distances. We show how careful calibration BE scale places these salt correctly on edge...
The study presented is an example of the assessment relative sustainability either option for disposal domestic sanitary waste, via toilet or solid waste route. This required evaluation total (social, economic, environmental, and technical) benefit/cost implementing adopting alternative routes public responsiveness to encouragement change practices. It illustrates how, even apparently straightforward either/or question, complex amount data needed quantify indicators prodigious. also provides...
Gastroblastoma is a newly defined neoplasm of children and young adults with only 4 reported cases to date. Morphologically, the tumor mixture epithelial structures stromal elements minimal cytologic atypia. In these cases, there were no metastases or postresection recurrences. We report case gastroblastoma in 28-year-old man histologic nodal metastasis clinical distant metastases.
We report the results of a Versailles Project on Advanced Materials and Standards interlaboratory study intensity scale calibration x-ray photoelectron spectrometers using low-density polyethylene (LDPE) as an alternative material to gold, silver, copper. An improved set LDPE reference spectra, corrected for different instrument geometries quartz-monochromated Al Kα source, was developed data provided by participants in this study. Using these new transmission function calculated each...
Charge transfer dynamics between an adsorbed molecule and a rutile TiO2(110) surface have been investigated in three organometallic dyes related to multicenter water splitting dye complexes: Ru 535 (cis-bis(isothiocyanato)bis(2,2′-bipyridyl-4,4′-dicarboxylato)-ruthenium(II)), 455 (cis-bis(2,2′-bipyridyl)-(2,2′-bipyridyl-4,4′-dicarboxylic acid)-ruthenium(II)), 470 (tris(2,2′-bipyridyl-4,4′-dicarboxylic acid)-ruthenium(II)). The adsorption of the molecules on has studied using core-level...
X-ray absorption spectroscopy investigations of the spin-state switching spin-crossover (SCO) complexes adsorbed on a highly-oriented pyrolytic graphite (HOPG) surface have shown so far that HOPG is promising candidate to realize applications such as spintronic devices because stability SCO and possibility highly efficient thermal light-induced switching. Herein, we present spin several Fe(II) an with particular emphasis thermally induced transition behaviour respect different structural...
Single molecule magnets based on the dodecamanganese (III, IV) cluster with two different types of ligand (acetate and benzoate) have been studied Au(111) surface. Due to non-volatile fragile nature molecules, we used ultra-high vacuum electrospray deposition produce a series surface coverages from fraction monolayer multilayer films in both cases. Synchrotron radiation electron spectroscopy has study adsorption molecules effect that this oxidation states manganese atoms core. In cases,...
<h3>Abstract</h3> <b>Objective</b>: To assess the relation between tap water lead and maternal blood concentrations exposure of infants to in a supply area subjected maximal treatment reduce plumbosolvency. <b>Design</b>: Postal questionnaire survey collection kettle from representative sample mothers; further samples were collected random households with raised concentrations. <b>Setting</b>: Loch Katrine area, Glasgow. <b>Subjects</b>: 1812 mothers live infant born October 1991 September...
The interaction of C60 with the Au(111) surface has been investigated using synchrotron radiation-based electron spectroscopy. Resonant photoelectron spectroscopy and autoionization have used to probe coupling between molecule substrate. Three distinct high energy spectator Auger features were observed that are only evident for a monolayer chemisorbed not multilayer or clean itself. Combined C 1s x-ray absorption valence band spectra, data suggest decay process previously reported this...
Modern analytical techniques have been applied to investigate the nature of lead pipe corrosion products formed in pH adjusted, orthophosphate-treated, low alkalinity water, under supply conditions. Depth profiling and surface analysis carried out on samples obtained from water distribution system Glasgow, Scotland, UK. X-ray diffraction spectrometry identified basic carbonate, oxide phosphate as principal components. Scanning electron microscopy/energy-dispersive x-ray revealed crystalline...
Solvent tuning the hydrogen-bonding network tortuosity in sulfonate coordination polymers reveals a structure–function descriptor spanning varied metals and ligands.
This paper investigates the toxicological concerns associated with nickel–silicon carbide (Ni–SiC) electroplated nanocomposite coatings as an alternative to conventional chromium electrodeposition.
The interaction of the dye molecule, N3 (cis-bis(isothiocyanato)bis(2,2′-bipyridyl-4,4′-dicarboxylato)-ruthenium(II)), and related ligand molecules with a Au(111) surface has been studied using synchrotron radiation-based electron spectroscopy. Resonant photoemission spectroscopy (RPES) autoionization adsorbed have used to probe coupling between substrate. Evidence charge transfer from states near Fermi level gold substrate into lowest unoccupied molecular orbital (LUMO) is found in...
Metal–organic frameworks (MOFs) have emerged as promising candidate materials for proton exchange membranes (PEMs), due to the control of transport enabled by functional groups and structural order within MOFs. In this work, we report a millifluidic approach synthesis MOF incorporating both sulfonate amine groups, termed Cu-SAT, which exhibits high conductivity. The fouling-free multiphase flow reactor was operated more than 5 h with no reduction in yield or change particle size...
A single centre water splitting dye complex (aqua(2,2′-bipyridyl-4,4′-dicarboxylic acid)-(2,2′:6′,6′′-terpyridine)Ruthenium(II)), along with a related ((2,2′-bipyridyl-4,4′-dicarboxylic acid)-(2,2′:6’,6′′-terpyridine)chloride Ruthenium(II)), has been investigated using photoemission and compared to molecules similar structures. Dye were deposited in situ ultra-high vacuum electrospray deposition, which allows for the deposition of thermally labile molecules, such as these molecules....
Controlling molecules in direct contact with surfaces is central to molecular electronics. Photochromic immobilized and contacted by a surface promise provide remote control on the level using light. Combining X-ray absorption spectroscopy, differential reflectance density functional theory, we demonstrate highly efficient bidirectional photochromism of spirooxazine switch Au(111) surface. The ring-opening reaction UV light 2 orders magnitude more than previously reported for other...