A5081534068- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Graphene research and applications
- Porphyrin and Phthalocyanine Chemistry
- Surface and Thin Film Phenomena
- Fullerene Chemistry and Applications
- Synthesis and Properties of Aromatic Compounds
- Lanthanide and Transition Metal Complexes
- Covalent Organic Framework Applications
- Magnetism in coordination complexes
- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Nanocluster Synthesis and Applications
- Organic Electronics and Photovoltaics
- Advanced Chemical Physics Studies
- Theoretical and Computational Physics
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Supramolecular Self-Assembly in Materials
- Block Copolymer Self-Assembly
- 2D Materials and Applications
- Force Microscopy Techniques and Applications
- Quantum Dots Synthesis And Properties
- Luminescence and Fluorescent Materials
IMDEA Nanoscience
2016-2025
Madrid Institute for Advanced Studies
2008-2025
Robert Bosch (Germany)
2022
Faraday Technology (United States)
2020-2021
Technical University of Munich
2010-2019
Swiss Federal Laboratories for Materials Science and Technology
2018
University of Namur
2010-2015
Universidad Autónoma de Madrid
2004-2011
University of Trieste
2010
Material Physics Center
2010
Ultrathin films of boron nitride (BN) have recently attracted considerable interest given their successful incorporation in graphene nanodevices and use as spacer layers to electronically decouple order functional adsorbates. Here, we introduce a BN monolayer grown by chemical vapor deposition borazine on single crystal Cu support, representing model system for an patterned but topographically smooth substrate. Scanning tunneling microscopy spectroscopy experiments evidence weak bonding the...
The templated synthesis of porphyrin dimers, oligomers, and tapes has recently attracted considerable interest. Here, we introduce a clean, temperature-induced covalent dehydrogenative coupling mechanism between unsubstituted free-base porphine units yielding trimers, larger oligomers directly on Ag(111) support under ultrahigh-vacuum conditions. Our multitechnique approach, including scanning tunneling microscopy, near-edge X-ray absorption fine structure photoelectron spectroscopy...
We employed a de novo synthesized porphyrin module to construct one-dimensional (1D) Cu-coordinated polymers on Cu(111) and Ag(111) surfaces. The programmed geometry functionality of the molecular together with its conformational flexibility substrate interaction yields sinuous metal−organic polymeric assemblies, based an unusual two-fold Cu−pyridyl coordination motif. An analysis scanning tunneling microscopy (STM) data reveals occurrence two enantiomers, resulting from surface confinement...
The tessellation of the Euclidean plane by regular polygons has been contemplated since ancient times and presents intriguing aspects embracing mathematics, art, crystallography. Significant efforts were devoted to engineer specific 2D interfacial tessellations at molecular level, but periodic patterns with distinct five-vertex motifs remained elusive. Here, we report a direct scanning tunneling microscopy investigation on cerium-directed assembly linear polyphenyl linkers terminal...
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...
Stacked up: Use of scanning tunneling microscopy allows manipulation the upper porphyrin tris(porphyrinato) cerium triple-decker complexes, which are obtained by a new synthetic route on smooth Ag(111) surface (see picture). Detailed facts importance to specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted authors. Please note: The publisher is responsible for content functionality any supporting...
We investigated the surface bonding and ordering of free-base porphine (2H-P), parent compound all porphyrins, on a smooth noble metal support. Our multitechnique investigation reveals surprisingly rich complex behavior, including intramolecular proton switching, repulsive intermolecular interactions, density-driven phase transformations. For small concentrations, molecular-level observations using low-temperature scanning tunneling microscopy clearly show operation interactions between 2H-P...
Suitable templates to steer the formation of nanostructure arrays on surfaces are indispensable in nanoscience. Recently, atomically thin sp(2)-bonded layers such as graphene or boron nitride (BN) grown metal supports have attracted considerable interest due their potential geometric corrugation guiding positioning atoms, metallic clusters molecules. Here, we demonstrate three specific functions a geometrically smooth, but electronically corrugated, sp(2)/metal interface, namely, BN/Cu(111),...
Abstract On-surface synthesis is a promising strategy for engineering heteroatomic covalent nanoarchitectures with prospects in electronics, optoelectronics and photovoltaics. Here we report the thermal tunability of reaction pathways molecular precursor order to select intramolecular versus intermolecular reactions, yielding monomeric or polymeric phthalocyanine derivatives, respectively. Deposition tetra-aza-porphyrin species bearing ethyl termini on Au(111) held at room temperature...
ConspectusMetallo-supramolecular engineering on surfaces provides a powerful strategy toward low-dimensional coordination architectures with prospects for several application fields. To date, most efforts have relied transition metal centers, and only recently did we pioneer lanthanide-directed assembly. Coordination spheres motifs rare-earth elements generally display distinct properties structural features. The size of the cations shielding role 4f orbitals induces high numbers, frequently...
Engineering low-band-gap π-conjugated polymers is a growing area in basic and applied research. The main synthetic challenge lies the solubility of starting materials, which precludes advancements field. Here, we report an on-surface synthesis protocol to overcome such difficulties produce poly(p-anthracene ethynylene) molecular wires on Au(111). To this aim, quinoid anthracene precursor with =CBr
We report the hierarchic design of homochiral 2D nanoporous networks under ultrahigh vacuum conditions on Ag(111) surface by using a flexible porphyrin derivative as primary unit. The conformational adaptation molecular module gives rise to two enantiomers upon confinement, which self-assemble in enantiopure clusters made three molecules reflecting chiral recognition, constitute secondary supramolecular building block mediating formation tertiary complex open networks. Our results show that...
We report on the adsorption and self-metalation of a prototypic tetrapyrrole compound, free-base porphine (2H-P), Cu(111) surface. Our multitechnique study combines scanning tunneling microscopy (STM) results with near-edge X-ray absorption fine-structure (NEXAFS) photoelectron spectroscopy (XPS) data whose interpretation is supported by density functional theory calculations. In first layer in contact copper substrate molecules adsorb coplanar surface as shown angle-resolved NEXAFS...
Studies of complex condensed matter systems have led to the discovery materials unexpected spatial organization as glasses, glassy crystals, quasicrystals, and protein virus crystals. Here, we present two-dimensional (2D) short-range disordered molecular crystalline networks, which, regarding organization, can be considered surface analogues 3D In particular, deposition a flexible module on Cu(111) gives rise distinct phases whose characteristics been examined in real space by scanning...
Abstract Selectivity in chemical reactions is a major objective industrial processes to minimize spurious byproducts and save scarce resources. In homogeneous catalysis the most important factor which determines selectivity structural symmetry. However, transfer of symmetry concept heterogeneous still requires detailed comprehension underlying processes. Here, we investigate ring‐closing reaction surface‐confined meso ‐substituted porphyrin molecules by scanning tunneling microscopy,...
We report the formation of a metal–organic network on BN/Cu(111) template by codeposition carbonitrile-functionalized porphyrin derivatives (2H-TPCN) with Co atoms in an ultrahigh vacuum environment. The resulting metallo-supramolecular structure explored scanning tunneling microscopy and spectroscopy features distinct 4-fold coordination motif. Furthermore, we demonstrate situ metalation tetrapyrrole macrocycles deposited yielding Co-TPCN directly BN sheet. Our results provide perspectives...
Abstract The formation of 2D surface‐confined supramolecular porous networks is scientifically and technologically appealing, notably for hosting guest species confinement phenomena. In this study, we report a scanning tunneling microscopy (STM) study the self‐assembly tripod molecule specifically equipped with pyridyl functional groups to steer simultaneous expression lateral pyridyl–pyridyl interactions Cu–pyridyl coordination bonds. assembly protocols yield new class open assemblies,...
The orthogonal coordinative properties of tetrapyrrole macrocycles and nitrile ligands have been used in a multistep procedure towards interfacial d-f hetero-bimetallic nanoarchitectures based on free-base porphyrin derivative functionalized with meso-cyanobiphenylene substituents. Molecular-level scanning tunneling microscopy studies reveal that the module alone self-assembles Ag(111) close-packed layer square unit cell. Upon co-deposition Gd atoms, square-planar motif is formed reflects...
On-surface chemistry in ultrahigh vacuum offers complementary routes for synthesizing molecular complexes that cannot be accessed through standard solution chemistry. The presence of a surface not only imposes spatial two-dimensional restraints but also frequently acts as source adatoms actively participating the chemical reactions. Here we demonstrate formation gold porphyrin derivatives via thermally induced transformations fluorinated free-base porphyrin, 2H-4FTPP, on Au(111) surface,...