All Outputs (27)

Porphyrin-fused graphene nanoribbons (2024)
Journal Article

Graphene nanoribbons (GNRs), nanometre-wide strips of graphene, are promising materials for fabricating electronic devices. Many GNRs have been reported, yet no scalable strategies are known for synthesizing GNRs with metal atoms and heteroaromatic u... Read More about Porphyrin-fused graphene nanoribbons.

Template‐Directed Synthesis of Strained meso‐meso‐Linked Porphyrin Nanorings (2024)
Journal Article

Strained macrocycles display interesting properties, such as conformational rigidity, often resulting in enhance π‐conjugation or enhanced affinity for non‐covalent guest binding, yet they can be difficult to synthesize. Here we use computational mod... Read More about Template‐Directed Synthesis of Strained meso‐meso‐Linked Porphyrin Nanorings.

Self-metalation of tetraphenyl porphyrin on Au(111): Structural characterisation via X-ray standing wave analysis (2023)
Journal Article

The study of surface-confined reactions provides a route towards characterising the mechanistic processes which underpin heterogeneous catalysis. On-surface reactions provide alternative pathways to solution phase synthesis, and can be studied by a r... Read More about Self-metalation of tetraphenyl porphyrin on Au(111): Structural characterisation via X-ray standing wave analysis.

Adsorption structure of iron phthalocyanine and titanyl phthalocyanine on Cu(1 1 1) (2023)
Journal Article

The adsorption structure of iron phthalocyanine (FePc) and titanyl phthalocyanine (TiOPc) was studied by a combination of near edge X-ray absorption fine structure (NEXAFS) spectroscopy and normal incidence X-ray standing waves (NIXSW) technique. The... Read More about Adsorption structure of iron phthalocyanine and titanyl phthalocyanine on Cu(1 1 1).

Covalent Template-Directed Synthesis of a Spoked 18-Porphyrin Nanoring** (2023)
Journal Article

Rings of porphyrins mimic natural light-harvesting chlorophyll arrays and offer insights into electronic delocalization, providing a motivation for creating larger nanorings with closely spaced porphyrin units. Here, we demonstrate the first synthesi... Read More about Covalent Template-Directed Synthesis of a Spoked 18-Porphyrin Nanoring**.

On-surface polymerisation and self-assembly of DPP-based molecular wires (2023)
Journal Article

The incorporation of organic semiconducting materials within solid-state electronic devices provides a potential route to highly efficient photovoltaics, transistors, and light emitting diodes. Key to the realisation of such devices is efficient intr... Read More about On-surface polymerisation and self-assembly of DPP-based molecular wires.

Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum (2022)
Journal Article

Ultra-high vacuum deposition of the polycyclic aromatic hydrocarbons azupyrene and pyrene onto a Cu(111) surface held at a temperature of 1000 K is herein shown to result in the formation of graphene. The presence of graphene was proven using scannin... Read More about Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum.

Bending a photonic wire into a ring (2022)
Journal Article

Natural light-harvesting systems absorb sunlight and transfer its energy to the reaction centre, where it is used for photosynthesis. Synthetic chromophore arrays provide useful models for understanding energy migration in these systems. Research has... Read More about Bending a photonic wire into a ring.

Molecular Diffusion and Self-Assembly: Quantifying the Influence of Substrate hcp and fcc Atomic Stacking (2022)
Journal Article

Molecular diffusion is a fundamental process underpinning surface-confined molecular self-assembly and synthesis. Substrate topography influences molecular assembly, alignment, and reactions with the relationship between topography and diffusion link... Read More about Molecular Diffusion and Self-Assembly: Quantifying the Influence of Substrate hcp and fcc Atomic Stacking.

Order, disorder, and metalation of tetraphenylporphyrin (2H-TPP) on Au(111) (2022)
Journal Article

A thermally induced order–disorder transition of tetraphenylporphyrin (2H-TPP) on Au(111) is characterised by scanning probe microscopy and X-ray photoelectron spectroscopy-based techniques. We observed that a transition from an ordered close-packed... Read More about Order, disorder, and metalation of tetraphenylporphyrin (2H-TPP) on Au(111).

Self-assembly of a strapped linear porphyrin oligomer on HOPG (2021)
Journal Article

Polymeric structures based on porphyrin units exhibit a range of complex properties, such as nanoscale charge transport and quantum interference effects, and have the potential to act as biomimetic materials for light-harvesting and catalysis. These... Read More about Self-assembly of a strapped linear porphyrin oligomer on HOPG.

Chemical shielding of H2O and HF encapsulated inside a C60 cage (2021)
Journal Article

Molecular surgery provides the opportunity to study relatively large molecules encapsulated within a fullerene cage. Here we determine the location of an H2O molecule isolated within an adsorbed buckminsterfullerene cage, and compare this to the intr... Read More about Chemical shielding of H2O and HF encapsulated inside a C60 cage.

Molecular Quantum Rings Formed from a π -Conjugated Macrocycle (2020)
Journal Article

The electronic structure of a molecular quantum ring (stacks of 40-unit cyclic porphyrin polymers) is characterized via scanning tunneling microscopy and scanning tunneling spectroscopy. Our measurements access the energetic and spatial distribution... Read More about Molecular Quantum Rings Formed from a π -Conjugated Macrocycle.

Structural characterisation of molecular conformation and the incorporation of adatoms in an on-surface Ullmann-type reaction (2020)
Journal Article

© 2020, The Author(s). The on-surface synthesis of covalently bonded materials differs from solution-phase synthesis in several respects. The transition from a three-dimensional reaction volume to quasi-two-dimensional confinement, as is the case for... Read More about Structural characterisation of molecular conformation and the incorporation of adatoms in an on-surface Ullmann-type reaction.

On-surface chemical reactions characterised by ultra-high resolution scanning probe microscopy (2020)
Journal Article

In the last decade it has become possible to resolve the geometric structure of organic molecules with intramolecular resolution using high resolution scanning probe microscopy (SPM), and specifically using the subset of SPM known as noncontact atomi... Read More about On-surface chemical reactions characterised by ultra-high resolution scanning probe microscopy.

On-Surface Synthesis within a Porphyrin Nanoring Template (2019)
Journal Article

On-surface synthesis provides a route for the production of 1D and 2D covalently bonded polymeric structures. Such reactions are confined to the surface of a substrate and the catalytic properties of the substrate are often utilised to initiate the r... Read More about On-Surface Synthesis within a Porphyrin Nanoring Template.

Frontispiece: An On-Surface Reaction Confined within a Porous Molecular Template (2018)
Journal Article

An On-Surface Reaction Confined within a Porous Molecular Template (2017)
Journal Article

On-surface reactions based on metal-catalysed Ullmann coupling have been successfully employed to synthesise a wide variety of covalently coupled structures. Substrate chemistry and topology are both known to effect the progression of an on-surface r... Read More about An On-Surface Reaction Confined within a Porous Molecular Template.

Ullmann coupling reactions on Ag(111) and Ag(110); substrate influence on the formation of covalently coupled products and intermediate metal-organic structures Metal-Organic Structures (2017)
Journal Article

On-surface reactions based on Ullmann coupling are known to proceed on coinage-metal substrates (e.g. Au, Ag, Cu), with the chemistry of the surface strongly influencing the reaction progression. In addition, the topography of the surface may be expe... Read More about Ullmann coupling reactions on Ag(111) and Ag(110); substrate influence on the formation of covalently coupled products and intermediate metal-organic structures Metal-Organic Structures.

Probing properties of molecule-based interface systems: general discussion and Discussion of the Concluding Remarks (2017)
Journal Article