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O: Fachverband Oberflächenphysik
O 6: Poster Session I: Organic molecules on inorganic substrates: Adsorption and growth I
O 6.4: Poster
Monday, March 1, 2021, 10:30–12:30, P
Chiral Recognition in the Self-Assembly of Trioxa[11]helicene on Metal Surfaces — •Bahaaeddin Irziqat1, Jan Berger1,2, Jesús Mendieta-Moreno2, Mothuku Shyam Sundar3, Ashutosh V. Bedekar4, and Karl-Heinz Ernst1,2 — 1Surface Science and Coating Technologies, Swiss Federal Laboratories for Materials Science and Technology (EMPA), Dübendorf, Switzerland — 2Nanosurf Laboratory, Institute of Physics, The Czech Academy of Sciences, Prague, Czech Republic — 3Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic — 4Department of Chemistry, The Maharaja Sayajirao University of Baroda, Vadodara, India
Chiral molecules adsorbed on metal surfaces have promising properties for applications in devices based on organic materials, such as chiroptical sensors or electron-spin filters. For this purpose, the two-dimensional (2D) crystallization of trioxa[11]helicene (TO[11]H) on the single crystalline (100) surfaces of Ag and Cu have been studied using scanning probe microscopy techniques (STM/nc-AFM) assisted by molecular dynamics simulations. In similarity to previously reported 2D-crystallization of heptahelicene ([7]H) on Ag(100) and Cu(100) [1,2], TO[11]H on Ag(100) shows a transition from homochiral structural motifs to large heterochiral domains with increasing coverage, whereas on Cu(100), enantiopure mirror domains, forming a 2D conglomerate structure, are observed.