A5000042748- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Molecular Junctions and Nanostructures
- Porphyrin and Phthalocyanine Chemistry
- Graphene research and applications
- Synthesis and Properties of Aromatic Compounds
- Conducting polymers and applications
- Surface Chemistry and Catalysis
- Luminescence and Fluorescent Materials
- Organic Electronics and Photovoltaics
- Advancements in Battery Materials
- Advanced battery technologies research
- Axial and Atropisomeric Chirality Synthesis
- Organometallic Complex Synthesis and Catalysis
- Catalysis and Oxidation Reactions
- Laser-Ablation Synthesis of Nanoparticles
- Advanced Electron Microscopy Techniques and Applications
- Synthesis of heterocyclic compounds
- CO2 Reduction Techniques and Catalysts
- X-ray Diffraction in Crystallography
- Metalloenzymes and iron-sulfur proteins
- Thin-Film Transistor Technologies
- Metal-Catalyzed Oxygenation Mechanisms
- Electron and X-Ray Spectroscopy Techniques
- Synthesis and Characterization of Pyrroles
University of Oxford
2016-2019
University of Nottingham
2011-2017
Science Oxford
2016
Park University
2014
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,...
The powerful electron accepting ability of fullerenes makes them ubiquitous components in biomimetic donor–acceptor systems that model the intermolecular transfer processes Nature's photosynthetic center. Exploiting perylene diimides (PDIs) as cyclic host for noncovalent recognition is unprecedented, part because archetypal PDIs are also deficient, making dyad assembly formation electronically unfavorable. To address this, we report strategic design and synthesis a novel large, macrocyclic...
By addressing the challenge of controlling molecular motion, mechanically interlocked machines are primed for a variety applications in field nanotechnology. Specifically, designed manipulation communication pathways between electron donor and acceptor moieties that strategically integrated into dynamic photoactive rotaxanes catenanes may lead to efficient artificial photosynthetic devices. In this pursuit, novel [3]rotaxane shuttle consisting four-station bis-naphthalene diimide (NDI)...
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...
We have employed the scanning tunneling microscope break-junction technique to investigate single-molecule conductance of a family 5,15-diaryl porphyrins bearing thioacetyl (SAc) or methylsulfide (SMe) binding groups at ortho position phenyl rings (S2 compounds). These substituents lead two atropisomers, cis and trans, for each compound, which do not interconvert in solution under ambient conditions; even high temperatures, isomerization takes several hours (half-life 15 h 140 °C SAc...
Anisotropy of intermolecular and molecule-substrate interactions holds the key to controlling arrangement fullerenes into 2D self-assembled monolayers (SAMs). The chemical reactivity allows functionalization carbon cages with sulfur-containing groups, thiols thioethers, which facilitates reliable adsorption these molecules on gold substrates. A series structurally related molecules, eight are new fullerene compounds, systematic investigation structural functional parameters defining geometry...
The treatment of the ligands with copper(II) chloride dihydrate led to formation a binuclear copper complex [Cu+1.5Cu+1.5] redox state as result C–S bond cleavage in course reaction. This catalyses electrochemical reduction nitrous oxide and triphenyl phosphine oxidation under N2O action.
A novel approach to heterogenization of catalytic molecules is demonstrated using the nanoscale graphitic step edges inside hollow graphitized carbon nanofibers (GNFs). The presence fullerene C60 moiety within a fullerene–salen CuII complex essential for anchoring catalyst GNF nanoreactor as by comparison analogous without group. at GNFs confirmed high-resolution transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX) with ultraviolet/visible (UV/vis)...
Electron-transfer processes play a significant role in host-guest interactions and determine physicochemical phenomena emerging at the nanoscale that can be harnessed electronic or optical devices, as well biochemical catalytic systems. A novel method for qualifying quantifying doping of single walled carbon nanotubes (SWNTs) using electrochemistry has been developed establishes direct link between these experimental measurements ab initio DFT calculations. Metallocenes such cobaltocene...
A novel fullerene-bipyridine-Pt-catecholate triad forms the lowest energy charge separated state upon photoexcitation, investigated by time-resolved infrared spectroscopy.
Abstract A covalently‐linked salen–C 60 (H 2 L) assembly binds a range of transition metal cations in close proximity to the fullerene cage give complexes [M(L)] (M=Mn, Co, Ni, Cu, Zn, Pd), [MCl(L)] (M=Cr, Fe) and [V(O)L]. Attaching salen covalently C only marginally slows down binding at functionality compared free salen. Coordination introduces these derivatives strong absorption bands across visible spectrum from 400 630 nm, optical features which are controlled by nature metal. The redox...
A series of six fullerene–linker–fullerene triads have been prepared by the stepwise addition fullerene cages to bridging moieties thus allowing systematic variation cage (C 60 or C 70 ) and linker (oxalate, acetate terephthalate) enabling precise control over inter-fullerene separation. The exhibit good solubility in common organic solvents, linear geometries are diastereomerically pure. Cyclic voltammetric measurements demonstrate excellent electron accepting capacity all triads, with up 6...
A series of explorative cross-coupling reactions have been developed to investigate the local nanoscale environment around catalytically active Pd(II)complexes encapsulated within hollow graphitised nanofibers (GNF). Two new fullerene-containing and fullerene-free Pd(II)Salen catalysts synthesised, their activity selectivity towards different substrates has explored in nanoreactors. The not only show a significant increase stability upon heterogenisation at graphitic step-edges inside GNF...
Indene C 60 and 70 bisadducts (IC BA IC BA) have relatively high lowest unoccupied molecular orbital energies. In poly(3‐hexylthiophene) (P3HT)‐based polymer solar cells (PSCs), this produces an increase in open‐circuit voltage ( V OC ) power conversion efficiency (PCE). However, ICBA synthesis a mixture of regio‐isomers with different indene spatial orientations (2, 5, 12 o'clock) that alter the packing when mixed P3HT. paper, how regio‐isomerism affects PSC performance is examined by...
Hybrid materials based on polythiophene–fullerene species covalently attached through aziridine bridges are presented, as potential stabilizers of P3HT:IC<sub>70</sub>BA active layers for BHJ devices.
The encapsulation of trityl-functionalised C60 molecules inside carbon nanotubes drastically affects the intermolecular interactions for this species. Whilst orientations in crystal are often controlled by thermodynamics, molecular a result kinetic control imposed mechanism entry into and within nanotube.
Measurement of the electrical properties porphyrin single molecular wires sandwiched between metal contacts is now an experimental reality and such methods have contributed to understanding charge flow through current-voltage response wires. We exploited scanning-tunneling-microscopy-based as STM break junction method non-contact I(s) technique (I=current s=distance tip substrate) for achieving this feat. In both these techniques molecule junctions are formed by bringing a gold into contact...