Surfaces – Página 2

Lanthanide-porphyrin species as Kondo irreversible switches through tip-induced coordination chemistry (NANOSCALE 2021)

nachomar 24 junio, 2021 24 junio, 2021DFT, Molecules, STM, Surfaces

Metallosupramolecular chemical protocols are applied to in situ design dysprosium porphyrin complexes on Au(111) by sequential deposition of 2H-4FTPP species and Dy, resulting in the production of premetallated Dy-2H-4FTPP, partially metallated Dy-1H-4FTPP and fully metallated Dy-0H-4FTPP complexes, as determined by scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. A zero…

A Trapezoidal Octacyanoquinoid Acceptor Forms Solution and Surface Products by Antiparallel Shape Fitting with Conformational Dipole Momentum Switch (ANGEW. CHEM. 2021)

nachomar 24 junio, 2021 24 junio, 2021DFT, Molecules, STM, Surfaces

A new compound (1) formed by two antiparallelly disposed tetracyano thienoquinoidal units has been synthesized and studied by electrochemistry, UV/Vis-NIR, IR, EPR, and transient spectroscopy. Self-assembly of 1 on a Au(111) surface has been investigated by scanning tunneling microscopy. Experiments have been rationalized by quantum chemical calculations. 1 exhibits a…

Surfaces open new routes: unexpected formation of m-PANI oligomers from p-aminophenol (ANGEW. CHEM. 2020)

paqui 21 octubre, 2020 22 abril, 2021DFT, Molecules, Sin categoría, STM, Surfaces

Surfaces never fail to surprise. Once more, they have demonstrated that chemistry on 2D metallic surfaces behaves differently to that on solution (3D). We have shown that highly unspecific solution-based Michael addition transforms into highly selective when carried out on a Pt(111) surface. In this way, we are able to…

Surface symmetry and reactivity rule the room-temperature adsorption of p-aminophenol (J. Phys. Chem. C 2020)

paqui 11 septiembre, 2020 4 diciembre, 2020Molecules, STM, Surfaces

Molecular chemisorption on metal surfaces has attracted great interest over the past decades. Both the characteristics of the adsorbed molecules and the surface properties govern the chemisorption processes. We have studied the role of the nature and symmetry of different metallic surfaces, Cu(110), Cu(111) and Pt(111), on the room-temperature adsorption…

Decoupling of PVD graphene by controlled oxygen intercalation (App. Surf. Sci. 2020)

paqui 6 julio, 2020 16 julio, 2020Surfaces

In the last decade after graphene isolation in 2004, many methods have been developed for the synthesis of this material. The most used substrates have been metal surfaces, due to their catalytic action, which is helpful for the formation of graphene. However, the coupling of the graphene layer with the…