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The influence of pH on the structure of adenine monolayers adsorbed at Au(110)/electrolyte interfaces
Author(s) -
Bowfield A.,
Smith C. I.,
Mansley C. P.,
Weightman P.
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200983929
Subject(s) - stacking , adsorption , electrolyte , monolayer , chemistry , molecule , ion , inorganic chemistry , anisotropy , weak base , base (topology) , organic chemistry , biochemistry , mathematical analysis , physics , mathematics , electrode , quantum mechanics
The pH of the solution is shown to significantly effect the reflection anisotropy spectroscopy (RAS) profiles of adenine adsorbed at Au(110)/electrolyte interfaces. At pH 12.8 the net adsorption is very weak due the formation of negative adenine ions in solution. The sensitivity of the RAS profiles to the pH of the solution is probably due to a change in the geometry of the adsorbed molecules caused by a disruption of the base stacking configuration that is adopted when adenine is adsorbed from solutions at pH 7.1