A5010398585- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Graphene research and applications
- Synthesis and Properties of Aromatic Compounds
- Porphyrin and Phthalocyanine Chemistry
- Fullerene Chemistry and Applications
- Organic Electronics and Photovoltaics
- Topological Materials and Phenomena
- Luminescence and Fluorescent Materials
- Solar and Space Plasma Dynamics
- Surface and Thin Film Phenomena
- Covalent Organic Framework Applications
- nanoparticles nucleation surface interactions
- Quantum and electron transport phenomena
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Physics of Superconductivity and Magnetism
- Nanofabrication and Lithography Techniques
- Advanced Condensed Matter Physics
- 2D Materials and Applications
IMDEA Nanoscience
2020-2024
Madrid Institute for Advanced Studies
2024
Faraday Technology (United States)
2020-2021
The design of open-shell carbon-based nanomaterials is at the vanguard materials science, steered by their beneficial magnetic properties like weaker spin-orbit coupling than that transition metal atoms and larger spin delocalization, which are potential relevance for future spintronics quantum technologies. A key parameter in exchange (MEC) between unpaired spins, should be large enough to allow device operation practical temperatures. In this work, we theoretically experimentally explore...
Abstract The incorporation of non‐benzenoid motifs in graphene nanostructures significantly impacts their properties, making them attractive for applications carbon‐based electronics. However, understanding how specific structures influence properties remains limited, and further investigations are needed to fully comprehend implications. Here, we report an on‐surface synthetic strategy toward fabricating nanographenes containing different combinations pentagonal heptagonal rings. Their...
The synthesis of novel polymeric materials with porphyrinoid compounds as key components the repeating units attracts widespread interest from several scientific fields in view their extraordinary variety functional properties potential applications a wide range highly significant technologies. vast majority such polymers present closed-shell ground state, and, only recently, result improved synthetic strategies, engineering open-shell spin delocalization along conjugation length has been...
The synthesis of long n-peri-acenes (n-PAs) is challenging as a result their inherent open-shell radical character, which arises from the presence parallel zigzag edges beyond certain n value. They are considered π-electron model systems to study magnetism in graphene nanostructures; being potential candidates fabrication optoelectronic and spintronic devices. Here, we report on-surface formation largest pristine member n-PA family, i.e. peri-heptacene (n=7, 7-PA), obtained on an Au(111)...
Abstract The atomically precise control over the size, shape and structure of nanographenes (NGs) or introduction heteroatom dopants into their sp 2 ‐carbon lattice confer them valuable electronic, optical magnetic properties. Herein, we report on design synthesis a hexabenzocoronene derivative embedded with graphitic nitrogen in its honeycomb lattice, achieved via on‐surface assisted cyclodehydrogenation Au(111) surface. Combined scanning tunnelling microscopy/spectroscopy non‐contact...
On-surface synthesis has recently emerged as a powerful strategy to design conjugated polymers previously precluded in conventional solution chemistry. Here, an N-containing pentacene-based precursor (tetraazapentacene) is ex-professo synthesized endowed with terminal dibromomethylene (:CBr2 ) groups steer homocoupling via dehalogenation on metallic supports. Combined scanning probe microscopy investigations complemented by theoretical calculations reveal how the substrate selection drives...
Non-benzenoid non-alternant nanographenes (NGs) have attracted increasing attention on account of their distinct electronic and structural features in comparison to isomeric benzenoid counterparts. In this work, we present a series unprecedented azulene-embedded NGs Au(111) during the attempted synthesis cyclohepta[def]fluorene-based high-spin non-Kekulé structure. Comprehensive scanning tunneling microscopy (STM) non-contact atomic force (nc-AFM) evidence structures conformations these...
Synthesis and characterization by scanning probe microscopy of cumulene-like bridged indeno[1,2-<italic>b</italic>]fluorene π-conjugated polymers on coinage metals.
The synthesis of nanographenes (NGs) with open-shell ground states have recently attained increasing attention in view their interesting physicochemical properties and great prospects manifold applications as suitable materials within the rising field carbon-based magnetism. A potential route to induce magnetism NGs is introduction structural defects, for instance non-benzenoid rings, honeycomb lattice. Here, we report on-surface three (A1, A2 A3) on Au(111) surface. A1 contain two five- one...
On-surface investigations of pentacene molecules functionalized with four dibromomethylene groups reveal, after an annealing step, the formation π-conjugated ladder polymers doubly-linked by ethynylene bridges on a Au(111) surface.
Abstract The incorporation of non‐benzenoid motifs in graphene nanostructures significantly impacts their properties, making them attractive for applications carbon‐based electronics. However, understanding how specific structures influence properties remains limited, and further investigations are needed to fully comprehend implications. Here, we report an on‐surface synthetic strategy toward fabricating nanographenes containing different combinations pentagonal heptagonal rings. Their...
Abstract The synthesis of long n‐ peri ‐acenes (n‐PAs) is challenging as a result their inherent open‐shell radical character, which arises from the presence parallel zigzag edges beyond certain n value. They are considered π‐electron model systems to study magnetism in graphene nanostructures; being potential candidates fabrication optoelectronic and spintronic devices. Here, we report on‐surface formation largest pristine member n‐PA family, i.e. ‐heptacene ( =7, 7‐PA ), obtained on an...
Antiferromagnetic spintronics is a rapidly emerging field with the potential to revolutionize way information stored and processed. One of key challenges in this development novel 2D antiferromagnetic materials. In paper, first on-surface synthesis Co-directed metal-organic network reported which Co atoms are strongly antiferromagnetically coupled, while featuring perpendicular magnetic anisotropy. This material promising candidate for future spintronic devices, as it combines advantages...
Abstract The atomically precise control over the size, shape and structure of nanographenes (NGs) or introduction heteroatom dopants into their sp 2 ‐carbon lattice confer them valuable electronic, optical magnetic properties. Herein, we report on design synthesis a hexabenzocoronene derivative embedded with graphitic nitrogen in its honeycomb lattice, achieved via on‐surface assisted cyclodehydrogenation Au(111) surface. Combined scanning tunnelling microscopy/spectroscopy non‐contact...
<title>Abstract</title> π-Conjugated polymers play a crucial role in modern organic optoelectronics and spintronics. However, key aspect remains unexplored: how to make π-conjugated polymer able host intrinsic solitons just by chemical design without the need of external doping. Exploiting on-surface synthesis address such challenge, we present novel reaction based on regio- stereo-selective coupling indenyl moieties for fabricating acenoindenylidene Au(111) surface, which feature...
On-surface chemistry represents a fast-growing field allowing to synthesize molecular structures not available by traditional wet chemistry. In this context, high-resolution scanning probe microscopy techniques are able provide unprecedented spatial resolution, precisely identify individual products of the reactions. Nevertheless, deep understanding reaction mechanism under conditions imposed substrate remains unknown. Nowadays, various computational strategies employed characterize optimal...
Surface-catalyzed reactions have been employed for the synthesis of carbon nanomaterials featuring precisely defined atomic structures. A recent breakthrough involves gold surface-catalyzed [3 + 3] cycloaromatization isopropyl-substituted arenes, allowing on-surface novel carbon-based polymers[1-3]. In this process, surface plays a crucial role in activating isopropyl substituents, facilitating formation phenylene rings through intermolecular coupling. For instance, such investigations might...
Recent advances in the synthesis of graphene fragments that possess unpaired π-electrons and display high-spin ground states have unlocked possibilities to explore exotic physical phenomena related magnetism. The high degree spin-delocalisation makes these non-metal-based systems ideal building blocks for construction chains lattices with strongly correlated magnetic states, which is main requisite measurement-based quantum computation. In this work, we demonstrate bistability a diradical...
π‐Electron magnetic compounds on surfaces have emerged as a powerful platform to interrogate spin interactions at the atomic scale, with great potential in spintronics and quantum technologies. A key challenge is organizing these over large length scales, while elucidating their resulting properties. Herein, we offer relevant contribution toward this objective, which consists of using on‐surface synthesis coupled coordination chemistry promote self‐assembly π‐electron porphyrin species....
π‐Electron magnetic compounds on surfaces have emerged as a powerful platform to interrogate spin interactions at the atomic scale, with great potential in spintronics and quantum technologies. A key challenge is organizing these over large length scales, while elucidating their resulting properties. Herein, we offer relevant contribution toward this objective, which consists of using on‐surface synthesis coupled coordination chemistry promote self‐assembly π‐electron porphyrin species....
The field of carbon magnetism has gained an increased attention in view the recent progress made synthesis and characterization open-shell polycyclic aromatic hydrocarbons following a bottom-up synthetic approach [1,2] . Under this scenario, comprehensive fabrication magnetic porphyrinoid-based polymers emerges as highly appealing research. However, vast majority porphyrinoid species studied to date exhibit closed-shell ground state [3] In work, we introduce exemplary toward unprecedented...
Die Vorstufe 4,5,9,10-Tetrakis(3-methylnaphthalen-2-yl)pyren wurde in Lösung synthetisiert, unter Ultrahochvakuumbedingungen auf einem Au(111)-Substrat sublimiert und durch thermische Aktivierung mittels oberflächenunterstützter oxidativer Ringschluss- Cyclodehydrierungsreaktionen das Periheptacen-Molekül umgewandelt. Einzelheiten zu dieser Forschung finden sich der Zuschrift von José I. Urgel, Pavel Jelínek, Xinliang Feng, David Écija et al. (DOI: 10.1002/ange.202114983).