All Outputs (18)

Porphyrin-fused graphene nanoribbons (2024)
Journal Article
Chen, Q., Lodi, A., Zhang, H., Gee, A., Wang, H. I., Kong, F., Clarke, M., Edmondson, M., Hart, J., O’Shea, J. N., Stawski, W., Baugh, J., Narita, A., Saywell, A., Bonn, M., Müllen, K., Bogani, L., & Anderson, H. L. (2024). Porphyrin-fused graphene nanoribbons. Nature Chemistry, 16, 1133-1140. https://doi.org/10.1038/s41557-024-01477-1

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
Van Raden, J. M., Deng, J., Gotfredsen, H., Hergenhahn, J., Clarke, M., Edmondson, M., …Anderson, H. L. (2024). Template‐Directed Synthesis of Strained meso‐meso‐Linked Porphyrin Nanorings. Angewandte Chemie International Edition, Article e202400103. https://doi.org/10.1002/anie.202400103

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.

Adsorption structure of iron phthalocyanine and titanyl phthalocyanine on Cu(1 1 1) (2023)
Journal Article
Stoodley, M. A., Klein, B. P., Clarke, M., Williams, L. B., Rochford, L. A., Ferrer, P., …Duncan, D. A. (2023). Adsorption structure of iron phthalocyanine and titanyl phthalocyanine on Cu(1 1 1). Inorganica Chimica Acta, 557, Article 121679. https://doi.org/10.1016/j.ica.2023.121679

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
Majewski, M. A., Stawski, W., Van Raden, J., Clarke, M., Hart, J., O'Shea, J., …Anderson, H. L. (2023). Covalent Template-Directed Synthesis of a Spoked 18-Porphyrin Nanoring**. Angewandte Chemie International Edition, Article 202302114. https://doi.org/10.1002/anie.202302114

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
Clarke, M., Bellamy-Carter, A., Malagreca, F., Hart, J., Argent, S. P., O'Shea, J. N., …Saywell, A. (2023). On-surface polymerisation and self-assembly of DPP-based molecular wires. Molecular Systems Design and Engineering, https://doi.org/10.1039/d2me00232a

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
Klein, B. P., Stoodley, M. A., Edmondson, M., Rochford, L. A., Walker, M., Sattler, L., Weber, S. M., Hilt, G., Williams, L. B. S., Lee, T.-L., Saywell, A., Maurer, R. J., & Duncan, D. A. (2022). Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum. Applied Physics Letters, 121(19), Article 191603. https://doi.org/10.1063/5.0122914

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
Gotfredsen, H., Deng, J. R., Van Raden, J. M., Righetto, M., Hergenhahn, J., Clarke, M., …Anderson, H. L. (2022). Bending a photonic wire into a ring. Nature Chemistry, 14(12), 1436–1442. https://doi.org/10.1038/s41557-022-01032-w

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
Edmondson, M., & Saywell, A. (2022). Molecular Diffusion and Self-Assembly: Quantifying the Influence of Substrate hcp and fcc Atomic Stacking. Nano Letters, 22(20), 8210-8215. https://doi.org/10.1021/acs.nanolett.2c02895

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.

Self-assembly of a strapped linear porphyrin oligomer on HOPG (2021)
Journal Article
Bellamy-Carter, A., Roche, C., Anderson, H. L., & Saywell, A. (2021). Self-assembly of a strapped linear porphyrin oligomer on HOPG. Scientific Reports, 11, Article 20388. https://doi.org/10.1038/s41598-021-99881-x

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
Jarvis, S. P., Sang, H., Junqueira, F., Gordon, O., Hodgkinson, J. E. A., Saywell, A., …Jones, R. G. (2021). Chemical shielding of H2O and HF encapsulated inside a C60 cage. Communications Chemistry, 4(1), Article 135. https://doi.org/10.1038/s42004-021-00569-0

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.

On-Surface Synthesis within a Porphyrin Nanoring Template (2019)
Journal Article
Judd, C. J., Kondratuk, D. V., Anderson, H. L., & Saywell, A. (2019). On-Surface Synthesis within a Porphyrin Nanoring Template. Scientific Reports, 9, Article 9352. https://doi.org/10.1038/s41598-019-45359-w

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.

Light-induced translation of motorized molecules on a surface (2016)
Journal Article
Saywell, A., Bakker, A., Mielke, J., Kumagai, T., Wolf, M., García-López, V., …Grill, L. (2016). Light-induced translation of motorized molecules on a surface. ACS Nano, 10(12), 10945-10952. https://doi.org/10.1021/acsnano.6b05650

Molecular machines are a key component in the vision of molecular nanotechnology and have the potential to transport molecular species and cargo on surfaces. The motion of such machines should be triggered remotely, ultimately allowing a large number... Read More about Light-induced translation of motorized molecules on a surface.

Publisher's Note: “Toward printing molecular nanostructures from microstructured samples in ultrahigh vacuum” [J. Vac. Sci. Technol. B 34, 011801 (2016)] (2016)
Journal Article
Nacci, C., Saywell, A., Troadec, C., Deng, J., Willinger, M. G., Joachim, C., & Grill, L. (2016). Publisher's Note: “Toward printing molecular nanostructures from microstructured samples in ultrahigh vacuum” [J. Vac. Sci. Technol. B 34, 011801 (2016)]. Journal of Vacuum Science and Technology B, 34(5), Article 053401. https://doi.org/10.1116/1.4962725

This article was originally published online on 7 December 2015 without one of the authors. All online versions of the article were corrected on 23 September 2016; the article is correct as it appears in the printed version of the journal.

Organisation and ordering of 1D porphyrin polymers synthesised by on-surface Glaser coupling (2016)
Journal Article
Saywell, A., Browning, A. S., Rahe, P., Anderson, H. L., & Beton, P. H. (2016). Organisation and ordering of 1D porphyrin polymers synthesised by on-surface Glaser coupling. Chemical Communications, 52(68), 10342-10345. https://doi.org/10.1039/C6CC03758E

One-dimensional polymer chains consisting of π-conjugated porphyrin units are formed via Glaser coupling on a Ag(111) surface. Scanning probe microscopy reveals the covalent structure of the products and their ordering. The conformational flexibility... Read More about Organisation and ordering of 1D porphyrin polymers synthesised by on-surface Glaser coupling.

Toward printing molecular nanostructures from microstructured samples in ultrahigh vacuum (2015)
Journal Article
Nacci, C., Saywell, A., Troadec, C., Deng, J., Willinger, M. G., Joachim, C., & Grill, L. (2015). Toward printing molecular nanostructures from microstructured samples in ultrahigh vacuum. Journal of Vacuum Science and Technology B, 34(1), https://doi.org/10.1116/1.4936886

Transferring molecular nanostructures from one surface to another in ultrahigh vacuum (UHV) by mechanical contact might be a possible route to avoid the severe limitations of in situ molecular synthesis on technologically relevant template surfaces.... Read More about Toward printing molecular nanostructures from microstructured samples in ultrahigh vacuum.

Physisorption controls the conformation and density of states of an adsorbed porphyrin (2015)
Journal Article
Jarvis, S. P., Taylor, S., Baran, J. D., Thompson, D., Saywell, A., Mangham, B., …Moriarty, P. (2015). Physisorption controls the conformation and density of states of an adsorbed porphyrin. Journal of Physical Chemistry C, 119(50), 27982-27994. https://doi.org/10.1021/acs.jpcc.5b08350

Conformational changes caused by adsorption can dramatically affect a molecule’s properties. Despite extensive study, however, the exact mechanisms underpinning conformational switching are often unclear. Here we show that the conformation of a proto... Read More about Physisorption controls the conformation and density of states of an adsorbed porphyrin.

Vernier-Templated Synthesis, Crystal Structure, and Supramolecular Chemistry of a 12-Porphyrin Nanoring (2014)
Journal Article
Kondratuk, D. V., Sprafke, J. K., O'Sullivan, M. C., Perdigão, L. M., Saywell, A., Malfois, M., …Anderson, H. L. (2014). Vernier-Templated Synthesis, Crystal Structure, and Supramolecular Chemistry of a 12-Porphyrin Nanoring. Chemistry - A European Journal, 20(40), 12826-12834. https://doi.org/10.1002/chem.201403714

Vernier templating exploits a mismatch between the number of binding sites in a template and a reactant to direct the formation of a product that is large enough to bind several template units. Here, we present a detailed study of the Vernier-templat... Read More about Vernier-Templated Synthesis, Crystal Structure, and Supramolecular Chemistry of a 12-Porphyrin Nanoring.

Manipulating the Conformation of Single Organometallic Chains on Au(111) (2013)
Journal Article
Saywell, A., Greń, W., Franc, G., Gourdon, A., Bouju, X., & Grill, L. (2014). Manipulating the Conformation of Single Organometallic Chains on Au(111). Journal of Physical Chemistry C, 118(3), 1719-1728. https://doi.org/10.1021/jp409323g

The conformations of organometallic polymers formed via the bottom-up assembly of monomer units on a metal surface are investigated, and the relationship between the adsorption geometry of the individual monomer units, the conformational structure of... Read More about Manipulating the Conformation of Single Organometallic Chains on Au(111).