A5051179395- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- Synthesis and Properties of Aromatic Compounds
- Organometallic Compounds Synthesis and Characterization
- Mechanical Behavior of Composites
- Boron Compounds in Chemistry
- Organoboron and organosilicon chemistry
- Crystallography and molecular interactions
- Perovskite Materials and Applications
- Metal complexes synthesis and properties
- Fullerene Chemistry and Applications
- Fatigue and fracture mechanics
- Organometallic Complex Synthesis and Catalysis
- Carbohydrate Chemistry and Synthesis
- Organic Light-Emitting Diodes Research
- Magnetism in coordination complexes
- Chemical Thermodynamics and Molecular Structure
- Graphene research and applications
- Porphyrin and Phthalocyanine Chemistry
- Chemical Reaction Mechanisms
- Synthesis of Indole Derivatives
- Organophosphorus compounds synthesis
Imperial College London
2000-2020
University of Manchester
2013-2019
Transnational Press London
2018
Centre de Recherches sur les Macromolécules Végétales
1989-1990
Ollscoil na Gaillimhe – University of Galway
1977-1987
With chlorinated solvents unlikely to be permitted for use in solution-processed organic solar cells industry, there must a focus on developing nonchlorinated solvent systems. Here we report high-efficiency devices utilizing low-bandgap donor polymer (PffBT4T-2DT) and nonfullerene acceptor (EH-IDTBR) from hydrocarbon without using additives. When mesitylene was used as the solvent, rather than chlorobenzene, an improved power conversion efficiency (11.1%) achieved need pre- or...
Abstract The synthesis of a highly twisted chrysene derivative incorporating two electron deficient o ‐carboranyl groups is reported. molecule exhibits complex, excitation‐dependent photoluminescence, including aggregation‐induced emission (AIE) with good quantum efficiency and an exceptionally long singlet excited state lifetime. Through combination detailed optical studies theoretical calculations, the species are identified, unusual excimer induced by presence ‐carborane. This first time...
Abstract The synthesis of a highly twisted chrysene derivative incorporating two electron deficient o ‐carboranyl groups is reported. molecule exhibits complex, excitation‐dependent photoluminescence, including aggregation‐induced emission (AIE) with good quantum efficiency and an exceptionally long singlet excited state lifetime. Through combination detailed optical studies theoretical calculations, the species are identified, unusual excimer induced by presence ‐carborane. This first time...
Abstract The temperature‐dependent aggregation behavior of PffBT4T polymers used in organic solar cells plays a critical role the formation favorable morphology fullerene‐based devices. However, there is little investigation into impact donor/acceptor ratio on tuning, especially for nonfullerene acceptors (NFAs). Herein, influence composition reported blends PffBT4T‐2DT with two NFAs, O‐IDTBR and O‐IDFBR. monotectic phase inferred from differential scanning calorimetry provides qualitative...
Three thiophene ring-terminated benzothieno[3,2-b]benzothiophene (BTBT) derivatives, C-C6-DBTTT, C-C12-DBTTT, and L-C12-DBTTT, were designed synthesized, differing in the isomerization of alkyl chain position as well aromatic core construction. A study crystal structure electronic properties combined with a theoretical investigation was performed to understand structure–property relationships for application these molecules organic field-effect transistors (OFETs). Different packing...
The Scholl‐type reactions of 4,10‐disubstituted chrysene derivatives proceeded by variegated and unexpected oxidation/coupling pathways. These observations serve as a cautionary note when attempting to employ the Scholl reaction in target‐oriented materials synthesis.
Abstract The role of the carborane isomer is investigated on structural and photophysical properties molecules comprising a cluster conjugated organic moiety by synthesizing isomeric o ‐, m p ‐carboranyl‐anthracene donor–acceptor dyads. While appending leads to emission from low energy intramolecular charge transfer state for ‐isomer, as well an excited localized anthracene, this not case ‐ ‐carborane derivatives. This difference attributed lower electron affinity latter two isomers....
A generic approach to the regiospecific synthesis of halogenated polycyclic aromatics is made possible by one- or two-directional benzannulation reactions readily available (ortho-allylaryl)trichloroacetates (the "BHQ" reaction). Palladium-catalysed cross-coupling so-formed haloaromatics enable functionalised aromatic hydrocarbons (PAHs) with surgical precision. Overall, this new methodology enables facile mining chemical space in search electronic functional materials.
This study presents preliminary experimental data suggesting that sodium 4-(pyrene-1-yl)butane-1-sulfonate (PBSA), 5, an analogue of pyrene-1-sulfonate (PSA), 1, enhances the stability aqueous reduced graphene oxide (RGO) dispersions. We find RGO and exfoliated dispersions prepared in presence 5 are approximately double concentration those made with commercially available PSA, 1. Quantum mechanical molecular dynamics simulations provide key insights into behavior these molecules on surface....
Mössbauer quadrupole splitting data for adducts SnX4·ML, SnRCl3·ML, and SnMe2(NCS)2·ML [R = Ph or Bun, X Cl, Br, I; M CuII NiII; L =NN′-ethylenebis(salicylideneiminate), NN′-o-phenylenebis(salicylideneiminate), derivatives of these] are discussed in terms the point-charge model, calculated presented 27 SnRCl3·ML. For each adduct SnRCl3·ML mer fac values differ substantially one is generally excellent agreement with experimental value; on this basis geometry assigned. Examples isomers occur...
The effect of substituting o-carborane into the most sterically hindered positions phenanthrene and benzo(k)tetraphene is reported. Synthesised via a Bull-Hutchings-Quayle benzannulation, crystal structures these non-linear acenes exhibited highest aromatic deformation parameters observed for any reported carborane compound to date, among largest carboranyl C-C bond length all organo-substituted o-carboranes. Photoluminescence studies compounds demonstrated efficient intramolecular...
Abstract The application of a new benzannulation reaction for the regiocontrolled synthesis functionalized chrysenes is reported. initial and subsequent halogen displacement reactions are both highly regiospecific, which thereby enables variety 4,10‐disubstituted from commercially available 1,5‐dihydroxynaphthalene.
The regioselective, orthogonal functionalisation of 4,10-dichlorochrysene enables the synthesis a variety 2,8,4,10-"A2B2"-tetrasubstituted chrysenes. Such compounds exhibit broadened UV-vis absorption spectra, decreased band gap and higher HOMO levels compared to parent chrysene.
A well-defined series of long and soluble isoindigo thienoacene oligomers have been synthesized from a novel electron deficient building block: benzo[1,2-b:4,5-b']bis[b]benzothiophene bislactams. Extension the π-conjugated systems facilitates control optical, electronic device characteristics.
Fouling of oil-exposed surfaces remains a crucial issue as result the continued importance oil world's primary energy source. The key perpetrators in crude fouling have been identified asphaltenes, poorly described mixture diverse polyfunctional molecules that form part heaviest fractions oil. Asphaltenes are responsible for decrease production and efficiency an increase risk environmental hazards. Hence, understanding managing systems prone to is great value but constitutes challenge their...