A5062671677- Carbon Nanotubes in Composites
- Graphene research and applications
- Fullerene Chemistry and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Nanomaterials for catalytic reactions
- Vehicle emissions and performance
- Catalytic Processes in Materials Science
- Advanced Combustion Engine Technologies
- Electrocatalysts for Energy Conversion
- Asymmetric Hydrogenation and Catalysis
- Molecular Junctions and Nanostructures
- Advanced Electron Microscopy Techniques and Applications
- Machine Learning in Materials Science
- Ammonia Synthesis and Nitrogen Reduction
- Advancements in Battery Materials
- Analytical Chemistry and Chromatography
- Process Optimization and Integration
- Nanocluster Synthesis and Applications
- Ionic liquids properties and applications
- Electron and X-Ray Spectroscopy Techniques
- Porphyrin and Phthalocyanine Chemistry
- Ion-surface interactions and analysis
- Electrochemical Analysis and Applications
- Supercapacitor Materials and Fabrication
- Hydrogen Storage and Materials
University of Leeds
2016-2025
Institute of Process Engineering
2024
University of Surrey
2022-2024
Robert Bosch (Germany)
2023
University of Nottingham
2011-2021
Park University
2014
National Hellenic Research Foundation
2008
University of Oxford
2007-2008
Systems Technology (United States)
1978
Volpe National Transportation Systems Center
1978
Carbon nanotubes (CNTs) act as efficient nanoreactors, templating the assembly of sulfur-terminated graphene nanoribbons (S-GNRs) with different sizes, structures, and conformations. Spontaneous formation from small sulfur-containing molecules is efficiently triggered by heat treatment or an 80 keV electron beam. S-GNRs form readily in CNTs internal diameters between 1 2 nm. Outside this optimum range, narrower than nm do not have sufficient space to accommodate 2D structure S-GNRs, while...
Self-optimising chemical systems have experienced a growing momentum in recent years. Herein, we review algorithms used for the self-optimisation of reactions an accessible way general chemist.
There has been an increasing interest in the use of automated self-optimising continuous flow platforms for development and manufacture synthesis recent years. Such processes include multiple reactive work-up steps, which need to be efficiently optimised. Here, we report combination multi-objective optimisation based on machine learning methods (TSEMO algorithm) with multi-step reaction processes. This is demonstrated a pharmaceutically relevant Sonogashira reaction. We demonstrate how...
Gold nanoparticles stabilized by phosphine-decorated polymer immobilized ionic liquids (AuNP@PPh2-PIILP) is an extremely efficient multiproduct selective catalyst for the sodium borohydride-mediated reduction of nitrobenzene giving N-phenylhydroxylamine, azoxybenzene, or aniline as sole product under mild conditions and a very low loading. The use single nanoparticle-based partial complete nitroarenes to afford three different products with exceptionally high selectivities unprecedented....
ConspectusThe main objective of this Account is to assess the challenges transmission electron microscopy (TEM) molecules, based on over 15 years our work in field, and outline opportunities studying chemical reactions under beam (e-beam). During TEM imaging an individual molecule adsorbed atomically thin substrate, such as graphene or a carbon nanotube, e-beam transfers kinetic energy atoms molecule, displacing them from equilibrium positions. Impact triggers bond dissociation various which...
The optimization of multistep chemical syntheses is critical for the rapid development new pharmaceuticals. However, concatenating individually optimized reactions can lead to inefficient syntheses, owing interdependencies between steps. Herein, we develop an automated continuous flow platform simultaneous telescoped reactions. Our approach applied a Heck cyclization-deprotection reaction sequence, used in synthesis precursor 1-methyltetrahydroisoquinoline C5 functionalization. A simple...
The consideration of discrete variables (e.g. catalyst, ligand, solvent) in experimental self-optimization approaches remains a significant challenge. Herein we report the application new mixed variable multi-objective optimization (MVMOO) algorithm for chemical reactions. Coupling MVMOO with an automated continuous flow platform enabled identification trade-off curves different performance criteria by optimizing and concurrently. This approach utilizes Bayesian methodology to provide high...
Graphitized carbon nanofibers (GNFs) act as efficient templates for the growth of gold nanoparticles (AuNPs) adsorbed on interior (and exterior) tubular nanostructures. Encapsulated AuNPs are stabilized by interactions with step-edges individual graphitic nanocones, which GNFs composed, and their size is limited to approximately 6 nm, while atomically flat surfaces GNF exterior continue 13 nm beyond under same heat treatment conditions. The corrugated structure imposes a significant barrier...
Clusters of transition metals, W, Re, and Os, upon encapsulation within a single-walled carbon nanotube (SWNT) exhibit marked differences in their affinity reactivity with the SWNT, as revealed by low-voltage aberration-corrected high-resolution transmission electron microscopy (AC-HRTEM). Activated an 80 keV beam, W reacts only weakly Re creates localized defects on sidewall, Os readily causing extensive defect formation constriction SWNT sidewall followed total rupture tubular structure....
In organic synthesis, the composition and structure of products are predetermined by reaction conditions; however, synthesis well-defined inorganic nanostructures often presents a significant challenge yielding nonstoichiometric or polymorphic products. this study, confinement in nanoscale cavities single-walled carbon nanotubes (SWNTs) provides new approach for multistep where sequential chemical transformations take place within same nanotube. first step, SWNTs donate electrons to reactant...
Redox flow batteries have the potential to revolutionize our use of intermittent sustainable energy sources such as solar and wind power by storing in liquid electrolytes. Our concept study utilizes a novel electrolyte system, exploiting derivatized fullerenes both anolyte catholyte species series battery cells, including symmetric, single system which alleviates common problem membrane crossover. The prototype multielectron utilizing molecular based charge carriers, made from inexpensive,...
Phosphino-decorated polymer immobilised ionic liquid-stabilised PdNPs are highly efficient catalysts for the aqueous phase hydrogenation and transfer of aromatic nitro compounds in batch continuous flow.
Improved synthesis through the use of alternating polarity.
We herein report a novel kinetic modelling methodology whereby identification of the correct reaction model and parameters is conducted by an autonomous framework combined with transient flow measurements to enable comprehensive process understanding minimal user input. An automated chemistry platform was employed initially conduct linear flow-ramp experiments rapidly map profile three processes using data. Following experimental data acquisition, computational approach utilised discriminate...
Abstract Implementing statistical training into undergraduate or postgraduate chemistry courses can provide high-impact learning experiences for students. However, the opportunity to reinforce this with a combined laboratory practical significantly enhance outcomes by providing bolstering of concepts. This paper outlines flow integrating design experiments optimisation techniques an organic session in which students construct simple reactor and perform structured series followed...
An open-source reaction simulator was designed to benchmark the performance of multi-objective optimisation algorithms using chemistry-inspired test problems, which validated an experimental self-optimisation platform.
We report an approach, named chemTEM, to follow chemical transformations at the single-molecule level with electron beam of a transmission microscope (TEM) applied as both tunable source energy and sub-angstrom imaging probe. Deposited on graphene, disk-shaped perchlorocoronene molecules are precluded from intermolecular interactions. This allows monomolecular be studied in real time reveals chlorine elimination reactive aryne formation key initial stage multistep reactions initiated by 80...
Although kinetic analysis has traditionally been conducted in a batch vessel, continuous-flow aided continues to swell popularity.
Industry 4.0 has birthed a new era for the chemical manufacturing sector, transforming reactor design and integrating digital twin into process control.