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Spontaneous Local Symmetry Breaking: A Conformational Study of Glycine on Cu{311}

Madden, DC, Temprano, I, Sacchi, M and Jenkins, SJ (2015) Spontaneous Local Symmetry Breaking: A Conformational Study of Glycine on Cu{311} Journal of Physical Chemistry C, 119 (23). pp. 13041-13049.

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Understanding the interplay between intrinsic molecular chirality and chirality of the bonding footprint is crucial in exploiting enantioselectivity at surfaces. As such, achiral glycine and chiral alanine are the most obvious candidates if one is to study this interplay on different surfaces. Here, we have investigated the adsorption of glycine on Cu{311} using reflection–absorption infrared spectroscopy, low-energy electron diffraction, temperature-programmed desorption, and first-principles density-functional theory. This combination of techniques has allowed us to accurately identify the molecular conformations present under different conditions and discuss the overlayer structure in the context of the possible bonding footprints. We have observed coverage-dependent local symmetry breaking, with three-point bonded glycinate moieties forming an achiral arrangement at low coverages, and chirality developing with the presence of two-point bonded moieties at high coverages. Comparison with previous work on the self-assembly of simple amino acids on Cu{311} and the structurally similar Cu{110} surface has allowed us to rationalize the different conditions necessary for the formation of ordered chiral overlayers.

Item Type: Article
Subjects : Chemistry
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
Madden, DC
Temprano, I
Sacchi, M
Jenkins, SJ
Date : 7 May 2015
DOI : 10.1021/acs.jpcc.5b02349
Copyright Disclaimer : © 2015 American Chemical Society. ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 09 Mar 2017 13:59
Last Modified : 31 Oct 2017 19:11

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