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@ARTICLE{Han:37536,
author = {Han, B. and Li, Z. and Pronkin, S. and Wandlowski, Th.},
title = {{I}n situ - {ATR}-{SEIRAS} study of adsorption and phase
formation of trimesic acid on {A}u(111-25nm) film
electrodes},
journal = {Canadian journal of chemistry},
volume = {82},
issn = {0008-4042},
address = {Ottawa, Ont.},
publisher = {NRC Research Press},
reportid = {PreJuSER-37536},
pages = {1481 - 1494},
year = {2004},
note = {Record converted from VDB: 12.11.2012},
abstract = {The adsorption and phase formation of 3 mmol L-1 trimesic
acid (TMA) on Au(111-25 nm) film electrodes in contact with
aq. 0.1 mol L-1 HClO4 electrolyte have been investigated by
in situ ATR-SEIRAS, cyclic voltammetry, chronoamperometry,
and STM measurements. Depending on the applied electrode
potential, TMA molecules assemble in three distinctly
different 2D ordered adlayers. In the range 0.10 < E < 0.50
V, planar-oriented molecules form an open ring honeycomb
pattern (phase I) stabilized by directional hydrogen bonds.
Interfacial water molecules are being replaced. A
close-packed, physisorbed adlayer II forms at higher
potentials in the range 0.58 < E < 0.75 V. Further increase
of the electrode potential causes an orientation change. An
initially disordered phase transforms into an ordered,
stripe-like chemisorbed adlayer III of perpendicularly
oriented TMA molecules (0.90 < E < 1.20 V). One carboxylate
group per molecule is bound to the electrode surface, while
the two other protonated carboxyl groups are directed toward
the electrolyte, and act as structure-determining components
of a hydrogen-bonded molecular ladder network. Strongly
hydrogen-bonded and isolated water species are co-adsorbed.
The potential-induced formation of chemisorbed TMA proceeds
in two steps: (i) orientation change from planar to a
disordered tilted and (or) perpendicular phase IIIa (tau < 5
ms) according to a Langmuir-type kinetics; (ii)
subsequently, the chemisorbed TMA molecules align into a
highly ordered, stripe-like phase IIIb with co-adsorbed
water species.},
keywords = {J (WoSType)},
cin = {ISG-3},
ddc = {540},
cid = {I:(DE-Juel1)VDB43},
pnm = {Materialien, Prozesse und Bauelemente für die Mikro- und
Nanoelektronik},
pid = {G:(DE-Juel1)FUEK252},
shelfmark = {Chemistry, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000225691900010},
doi = {10.1139/v04-118},
url = {https://juser.fz-juelich.de/record/37536},
}