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Intermolecular H-bonding for porphyrin molecules on surfaces: experimental evidences and theoretical investigation.

AuthorsGarcía-Lekue, Aran; González-Moreno, Rubén ; García-Gil, Sandra ; Floreano, Luca; Verdini, Alberto; Cossaro, Albano; Martín-Gago, José A. ; Arnau, Andrés ; Rogero, Celia
Issue Date2012
CitationNanoSpain 2012
AbstractThe study of the chemical bond of adsorbates on and with surfaces is of particular importance for new widespread developments, from healthcare to electronics or environment. In most cases these interactions are weak and they can be considered in the context of supramolecular chemistry, which studies the organization of systems based on weak and reversible noncovalent interactions. Among them, hydrogen bond is one of the most important interactions in chemistry, biology, pharmacology, electronic, etc. In this work, we detect the formation of H bond among porphyrin molecules adsorbed on metal surfaces. Particularly, by the comparison of experimentally observed shifts of the corelevels with first principle calculations, we identify the nature of the interaction of protoporphyrin IX molecules (H2PPIX) evaporated on Cu surfaces at low-temperature and we relate them with the formation of hydrogen bonds, covalent H-N as well as NH ···O-C hydrogen bonding, between the carboxylic group and the pyrrolic ring of adjacent molecules.
DescriptionTrabajo presentado a la Conferencia NanoSpain celebrada en Santander (España) del 27 de Febrero al 1 de Marzo de 2012.
Appears in Collections:(CFM) Comunicaciones congresos
(ICMM) Comunicaciones congresos
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