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Transition from Homochiral Clusters to Racemate Monolayers during 2D Crystallization of Trioxa[11]helicene on Ag(100)
Author(s) -
Irziqat Bahaaeddin,
Berger Jan,
MendietaMoreno Jesús I.,
Sundar Mothuku Shyam,
Bedekar Ashutosh V.,
Ernst KarlHeinz
Publication year - 2021
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202000853
Subject(s) - helicene , crystallization , nucleation , scanning tunneling microscope , monolayer , chemistry , intermolecular force , crystallography , chemical physics , cluster (spacecraft) , molecule , materials science , nanotechnology , organic chemistry , computer science , programming language , biochemistry
Abstract The phenomenon of chiral crystallization into homochiral crystals is known for more than 170 years, yet it is still poorly understood. Studying crystallization on surfaces under well‐defined condition seems a promising approach towards better understanding the intermolecular chiral recognition mechanisms during nucleation and growth. The two‐dimensional aggregation of racemic trioxaundecahelicene on the single crystalline silver(100) surface has been investigated with scanning tunneling microscopy and with non‐contact atomic force microscopy, as well as molecular modeling simulations. A transition from homochiral cluster motifs to heterochiral assembly into large islands with increasing coverage is observed. Force field modelling confirms higher stability of heterochiral arrangements from twelve molecules on. Results are discussed with respect to previous findings for the all‐carbon heptahelicene on the same surface.