Coverage dependent structures of oligopyridine adlayers on (111) oriented Ag films
文献信息
Matthias Roos, Harry E. Hoster, Achim Breitruck, R. Jürgen Behm
The coverage dependent formation of ordered structures in vapor deposited 2,4′-bis(terpyridine)derivatives (2,4′-BTP) on (111) oriented Ag films was investigated by STM. Following a two-dimensional (2D) disordered gas phase at lowest coverages, a sequence of at least three ordered structures is observed with increasing coverage. These include a ‘parallel chain structure’ (PCS), a ‘quasi-quadratic network’ (QQN) structure, and a ‘packed windmill structure’ (PWS), with ideal coverages of 0.37, 0.4, and 0.44 molecules nm−2. At intermediate coverages between 0.37 and 0.44 molecules nm−2, these structures coexist in larger islands. The energetics of the different phases, whose structures are mainly determined by attractive C–H⋯N bridges, are discussed in a picture including C–H⋯N and C–H⋯H–C interactions and lateral variations in the substrate–adsorbate interactions.
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Physical Chemistry Chemical Physics

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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