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Prochiral Guanine Adsorption on Au(111): An Entropy‐Stabilized Intermixed Guanine‐Quartet Chiral Structure
Author(s) -
Xu Wei,
Kelly Ross E. A.,
Gersen Henkjan,
Lægsgaard Erik,
Stensgaard Ivan,
Kantorovich Lev N.,
Besenbacher Flemming
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200900315
Subject(s) - guanine , annealing (glass) , adsorption , chemistry , molecule , crystallography , entropy (arrow of time) , stereochemistry , materials science , physics , organic chemistry , thermodynamics , biochemistry , nucleotide , gene
Guanine molecules adsorbed on the Au(111) surface at room temperature are observed to form a heterochiral phase consisting of two homochiral G‐quartet networks (see image, left). By annealing the sample at 400 K the R and L homochiral G‐quartet networks are found to irreversibly transform to a heterochiral G‐quartet network including both R and L G‐quartets in an equal amount (see image, right).