Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 71: Poster Wednesday: Adsorption and Catalysis

O 71.9: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B2

Effect of molecular structures on Metathesis reaction and its potential application — •Xiangzhi Meng1,2, Lacheng Liu1,2, Fatima Garcia3, Berta Alvarez3, Dolores Perez3, Hong-Ying Gao1,2, Diego Pena3, and Harald Fuchs1,21PhysikalischesInstitut,WestfalischeWilhelms-UniversitaẗMünster,Wilhelm-Klemm-Straße10,48149Münster,Germany — 2Center for Nanotechnology, Heisenbergstraße 11, 48149 Münster, Germany — 3CentrodeInvestigacioń enQuímicaBioloxicaeMateriaisMoleculares(CIQUS)andDepartamentodeQuímicaOrgańica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain

Recently, the σ-bond metathesis reaction has been reported between aromatic silylated alkynes and carboxylic acids on metal surfaces. Here, we further studied the effect of the molecular structures on the metathesis reaction on different (111) surfaces. Two silylated tetraynes with nonaromatic alkene and aromatic naphthalene as central cores were prepared and tested together with aromatic acids. A low-temperature scanning tunneling microscope was used. We found the aromatic tetrayne has a higher reactivity in the metathesis reaction than the nonaromatic tetrayne. It is also found that the metathesis reaction is surface-dependent. The metathesis reaction could become a new method for the bottom-up strategies and the related discoveries here will open new doors for the molecular designs in on-surface reactions.

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