Odd/Even Effect in Self-Assembly of Chiral Molecules at the Liquid−Solid Interface:  An STM Investigation of Coadsorbate Control of Self-Assembly

Manipulation of the self-assembly of chiral 2-bromohexadecanoic acid by templates composed of coadsorbed achiral molecules has been investigated at the liquid−solid interface using scanning tunneling microscopy (STM). The template formed by the odd-numbered saturated fatty acid heptadecanoic acid in...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2002-05, Vol.106 (21), p.5470-5475
Main Authors: Yablon, Dalia G, Wintgens, David, Flynn, George W
Format: Article
Language:English
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Summary:Manipulation of the self-assembly of chiral 2-bromohexadecanoic acid by templates composed of coadsorbed achiral molecules has been investigated at the liquid−solid interface using scanning tunneling microscopy (STM). The template formed by the odd-numbered saturated fatty acid heptadecanoic acid induces coadsorption of R-2-bromo-hexadecanoic acid and S-2-bromo-hexadecanoic acid within a single domain. Specifically, heptadecanoic acid effects an intra-lamellar alternation of R and S-2-bromo-hexadecanoic acid molecules, which is further confirmed by studies of heptadecanoic acid with pure R-2-bromo-hexadecanoic acid. Templates formed by even-numbered acids such as hexadecanoic acid induce the segregation of R- and S-2-bromo-hexadecanoic acid into separate (R or S) domains.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp020152b