The isomeric effect on the adjacent Si dimer didechlorination of trans and iso-dichloroethylene on Si(100)-2×1

Literature Information

Publication Date 2011-03-14
DOI 10.1039/C0CP01506G
Impact Factor 3.676
Authors

Qiuju Zhang, Bo Li, Qinghong Yuan, Baihai Li, Zhifeng Liu, Liang Chen


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Abstract

The dechlorination processes of isomers trans and iso-dichloroethylene (iso-DCE) on Si(100)-2×1 were investigated from first principles, to ascertain the isomeric effect on the adjacent Si dimer di-dechlorination of DCE on Si(100)-2×1. By comparing the feasible adspecies and their reaction barriers between trans and cis-DCE on Si(100)-2×1, we found that the isomeric effect of trans-DCE is negligible, which explained the similar C 1s peak locations in the X-ray photoelectron spectroscopy (XPS) experiment. In contrast, iso-DCE undergoes a more complicated reaction process, although the adjacent Si dimer di-dechlorination is still the dominant mechanism. Among the initial competitive reactions involving intra-, inter-cycloaddition and single C–Cl cleavage, the barrierless intra-cycloaddition is the most favorable reaction and precludes the single dechlorination that yields the mono-σ structure. Subsequent di-dechlorination undergoes a three-step reaction to yield the final product intra-dimer tetra-σ. In addition, the ionization energies of C 1s and Cl 2s electrons were calculated for the tentative assignment of the peaks observed in XPS.

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DOI: 10.1039/C5CP90090E

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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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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