Relative stability of thiol and selenol based SAMs on Au(111) — exchange experiments

Literature Information

Publication Date 2010-02-24
DOI 10.1039/B923274P
Impact Factor 3.676
Authors

Katarzyna Szelągowska-Kunstman, Piotr Cyganik, Bjorn Schüpbach, Andreas Terfort


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Abstract

Two fully analogue homologue series of thiol and selenol based aromatic self-assembled monolayers (SAMs) on Au(111) in the form of CH3–(C6H4)2–(CH2)n–S–Au(111) (BPnS/Au(111), n = 2–6) and CH3–(C6H4)2–(CH2)n–Se–Au(111) (BPnSe/Au(111), n = 2–6), respectively, have been used to elucidate the relative stability of the S–Au(111) and Se–Au(111) bonding by monitoring their exchange by alkanethiol and alkaneselenol molecules from their respective solutions. The exchange process was monitored using infrared reflection absorption spectroscopy (IRRAS). Two main results obtained by these study are: (1) the selenium-based BPnSe/Au(111) series is significantly more stable than their sulfur analogues; (2) a clear odd–even effect exists for the stability of both BPnS/Au(111) and BPnSe/Au(111) SAMs towards exchange processes with the even-numbered systems being less stable. The results obtained are discussed in view of previously reported microscopic and spectroscopic data of the same SAMs addressing the issue of the relative stability of S–Au(111) and Se–Au(111) bonding, which is an important factor for the rational design of SAMs.

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Contents list

Front/Back Matter

DOI: 10.1039/C7AN90016C

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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