A5060321836- Perovskite Materials and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Photochromic and Fluorescence Chemistry
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Metal Extraction and Bioleaching
- Advanced battery technologies research
- Organometallic Compounds Synthesis and Characterization
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Crystallography and molecular interactions
- Electrochemical Analysis and Applications
- Organic Chemistry Cycloaddition Reactions
- Origins and Evolution of Life
- Metal complexes synthesis and properties
- Metalloenzymes and iron-sulfur proteins
- CO2 Reduction Techniques and Catalysts
- Organoboron and organosilicon chemistry
- Boron Compounds in Chemistry
- Enzyme function and inhibition
- Nanocluster Synthesis and Applications
- Corrosion Behavior and Inhibition
- Solar-Powered Water Purification Methods
- Inorganic Chemistry and Materials
University College London
2013-2020
King's College London
2019
Chalmers University of Technology
2015-2018
Transnational Press London
2015
University of Bristol
2009
Solar energy conversion and solar storage are key challenges for a future society with limited access to fossil fuels. Certain compounds that undergo light-induced isomerisation metastable isomer can be used of energy, so-called molecular thermal systems. Exposing the compound sun light will generate high photoisomer stored. When is needed, catalytically converted back parent compound, releasing excess as heat. This Letter gives examples selected systems found in literature. The focus on...
CO<sub>2</sub>conversion to small bio-molecules on greigite minerals under room temperature and pressure.
The development of solar energy can potentially meet the growing requirements for a global system beyond fossil fuels, but necessitates new scalable technologies storage.
A hybrid solar energy system consisting of a molecular thermal storage (MOST) combined with water heating (SWH) is presented.
Although [Ni(S2CNBui2)2] is stable at high temperatures in a range of solvents, solvothermal decomposition occurs 145 °C oleylamine to give pure NiS nanoparticles, while n-hexylamine 120 mixture Ni3S4 (polydymite) and results. A combined experimental theoretical study gives mechanistic insight into the process can be used account for observed differences. Upon dissolution primary amine, octahedral trans-[Ni(S2CNBui2)2(RNH2)2] result as shown by situ XANES EXAFS confirmed DFT calculations....
Square-planar nickel bis(dithiocarbamate) complexes, [Ni(S2CNR2)2], have been prepared and utilised as single source precursors to nanoparticulate sulfides. While they are stable in the solid-state around 300 °C, heating oleylamine at 230 5 mM solutions afford pure α-NiS, where outcome is independent of substituents. DFT calculations show an electronic effect rather than steric hindrance influences resulting particle size. Decomposition iso-butyl derivative, [Ni(S2CNiBu2)2], has studied...
Efficient solar energy storage is a key challenge in striving toward sustainable future. For this reason, molecules capable of and release through valence isomerization, for so-called molecular thermal (MOST), have been investigated. Energy by photoconversion the dihydroazulene/vinylheptafulvene (DHA/VHF) photothermal couple has evaluated. The robust nature system determined multiple cycles at elevated temperatures three different solvents. In nonpolar solvent such as toluene, DHA/VHF can be...
Heating mixtures of dithiocarbamate complexes in oleylamine leads to the formation nanoparticulate ternary metal sulfides, physical nature and phase which can be tailored depending upon reaction conditions adopted.
Greigite and other iron sulfides are potential, cheap, earth-abundant electrocatalysts for the hydrogen evolution reaction (HER), yet little is known about underlying surface chemistry. Structural chemical changes to a greigite (Fe3S4)-modified electrode were determined at −0.6 V versus standard (SHE) pH 7, under conditions of HER. In situ X-ray absorption spectroscopy was employed Fe K-edge show that iron–sulfur linkages replaced by iron–oxygen units these conditions. The resulting material...
Heating [Zn(S<sub>2</sub>CN<sup>i</sup>Bu<sub>2</sub>)<sub>2</sub>] in oleylamine affords high aspect ratio nanowires of ZnS and <italic>in situ</italic> XAS studies the decomposition [Zn(S<sub>2</sub>CNMe<sub>2</sub>)<sub>2</sub>] give insight into mechanistic aspects molecular transformations.
Nanoparticulate iron sulfides have many potential applications and are also proposed to be prebiotic catalysts for the reduction of CO2 biologically important molecules, thus development reliable routes specific phases with controlled sizes morphologies is important. Here we focus on use dithiocarbamate complexes as single source precursors (SSPs) generate greigite pyrrhotite nanoparticles. Since these minerals contain both iron(iii) iron(ii) centres, SSPs in oxidation states, [Fe(S2CNR2)3]...
Almost half of solar energy reaching the Earth is in infrared, and for cells, IR absorbing/emitting quantum dots are highly effective photovoltaic materials. As a possible approach to generating such materials, an investigation into incorporation group IIB metal ions during shelling II–VI III–V semiconductor core/shell presented. Quantum dot shells consist ZnS additional sulphide, obtained from decomposition dithiocarbamate single‐source precursors. Resultant characterized interrogated using...
The synthesis and X-ray crystal structures of the diborane(4) isomers 1,1-B(2){1,2-(NH)(2)C(6)H(4)}(2) 1,2-B(2){1,2-(NH)(2)C(6)H(4)}(2) are described together with results quantum chemical calculations which shed light on their relative stabilities degree aromaticity. Spectroscopic data also provided for both 4-methyl aryl derivative. compound 1,1-B(2){1-O-2-(NH)C(6)H(4)}(2) has been prepared structurally characterised but no evidence was obtained corresponding 1,2-isomer. forms a co-crystal...
An in situ XAS study of the solvothermal decomposition iron and nickel dithiocarbamate complexes was performed order to gain understanding mechanisms. This work has given insight into steps involved decomposition, showing variation reaction pathways between dithiocarbamates, non-innocent role oleylamine as solvent capping agent reaction.
Abstract Invited for this month′s cover are the groups of Kasper Moth‐Poulsen at Chalmers University Technology and Mogens Brøndsted Nielsen Copenhagen. The image shows a conceptual graphic molecular solar thermal energy storage system (MOST) outdoor facilities. Full Paper itself is available 10.1002/cssc.201700679 .
Abstract Review: 55 refs.
The master's degree in Applied Analytical Chemistry at University College London (UCL) includes valuable teaching input from the UK National Measurement Laboratory for Chemical and Bio-Measurement hosted LGC. course starts by introducing accuracy, sensitivity, specificity, trueness, precision validating analytical chemistry measurement methods. principles of proficiency tests, quality control, ruggedness, associated statistics are practiced using a wide variety case studies.