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Impact of heterocirculene molecular symmetry upon two-dimensional crystallizationстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Xiao W.D., Zhang Y.Y., Tao L., Aït-Mansour K., Chernichenko K.Y., Nenajdenko V.G., Ruffieux P., Du S.X., Gao H.J., Fasel R.
- Журнал: Scientific reports
- Том: 4
- Год издания: 2014
- Издательство: Nature Publishing Group
- Местоположение издательства: United Kingdom
- DOI: 10.1038/srep05415
- Аннотация: Despite the development of crystal engineering, it remains a great challenge to predict the crystal structure even for the simplest molecules, and a clear link between molecular and crystal symmetry is missing in general. Here we demonstrate that the two-dimensional (2D) crystallization of heterocirculenes on a Au(111) surface is greatly affected by the molecular symmetry. By means of ultrahigh vacuum scanning tunneling microscopy, we observe a variety of 2D crystalline structures in the coverage range from submonolayer to monolayer for D 8h -symmetric sulflower (C 16 S 8), whereas D 4h -symmetric selenosulflower (C16 S4 Se4) forms square and rectangular lattices at submonolayer and monolayer coverages, respectively. No long-range ordered structure is observed for C 1h -symmetric selenosulflower (C 16 S5 Se3) self-assembling at submonolayer coverage. Such different self-assembly behaviors for the heterocirculenes with reduced molecular symmetries derive from the tendency toward close packing and the molecular symmetry retention in 2D crystallization due to van der Waals interactions. © 2014 Macmillan Publishers Limited. All rights reserved.
- Добавил в систему: Ненайденко Валентин Георгиевич