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Surface Chirality of Gly‐Pro Dipeptide Adsorbed on a Cu(110) Surface
Author(s) -
Cruguel Hervé,
Méthivier Christophe,
Pradier ClaireMarie,
Humblot Vincent
Publication year - 2015
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.22445
Subject(s) - chemistry , chirality (physics) , x ray photoelectron spectroscopy , molecule , crystallography , dipeptide , scanning tunneling microscope , adsorption , intermolecular force , carboxylate , infrared spectroscopy , stereochemistry , organic chemistry , nanotechnology , nuclear magnetic resonance , biochemistry , physics , chiral symmetry breaking , materials science , amino acid , quantum mechanics , nambu–jona lasinio model , quark
The adsorption of chiral Gly‐Pro dipeptide on Cu(110) has been characterized by combining in situ polarization modulation infrared reflection absorption spectroscopy (PM‐RAIRS) and X‐ray photoelectron spectroscopy (XPS). The chemical state of the dipeptide, and its anchoring points and adsorption geometry, were determined at various coverage values. Gly‐Pro molecules are present on Cu(110) in their anionic form (NH 2 /COO − ) and adsorb under a 3‐point binding via both oxygen atoms of the carboxylate group and via the nitrogen atom of the amine group. Low‐energy electron diffraction (LEED) and scanning tunneling microscopy (STM) have shown the presence of an extended 2D chiral array, sustained via intermolecular H‐bonds interactions. Furthermore, due to the particular shape of the molecule, only one homochiral domain is formed, creating thus a truly chiral surface. Chirality 27:411–416, 2015 . © 2015 Wiley Periodicals, Inc.