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An on-surface reaction confined within a porous molecular template
(The University of Nottingham, 2019-04-25)
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 ...
Ullmann coupling reactions on Ag(111) and Ag(110): substrate influence on the formation of covalently coupled products and intermediate metal-organic structures
(The University of Nottingham, 2017-11-09)
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 ...
Organisation and ordering of 1D porphyrin polymers synthesised by on-surface Glaser coupling
(The University of Nottingham, 2016-07-01)
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. ...
On-Surface Synthesis within a Porphyrin Nanoring Template
(The University of Nottingham, 2019-06-28)
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 ...
Molecular quantum ring formed from a pi-conjugated macrocycle
(The University of Nottingham, 2020-10-14)
The electronic structure of a molecular quantum ring (stacks of 40-unit cyclic porphyrin polymers) is characterised via scanning tunnelling microscopy and scanning tunnelling spectroscopy. Our measurements access the ...
Structural characterisation of molecular conformation and the incorporation of adatoms in an on-surface Ullmann-type reaction
(The University of Nottingham, 2020-11-03)
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 ...
Self-assembly of a strapped linear porphyrin oligomer on HOPG
(The University of Nottingham, 2021-11-03)
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 ...
Order, disorder, and metalation of tetraphenylporphyrin (2H-TPP) on Au(111)
(The University of Nottingham, 2022-05-09)
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 ...
Molecular diffusion and self-assembly: Quantifying the influence of substrate hcp and fcc atomic stacking
(The University of Nottingham, 2022-10-14)
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 ...