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Surface-confined self-assembly of asymmetric tetratopic molecular building blocks.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Surface-confined self-assembly of asymmetric tetratopic molecular building blocks."

Surface-confined self-assembly of functional molecular building blocks has been recently widely used to create low-dimensional, also covalent, superstructures with tailorable geometry and physicochemical properties. In this contribution, using the lattice Monte Carlo simulation method, we demonstrate how the structure-property relation can be established for the 2D self-assembly of a model tetrapod molecule with reduced symmetry. To that purpose, a rigid functional unit comprising a few interconnected segments arranged in different tetrapod shapes was used and its self-assembly on a triangular lattice representing a (111) crystal surface was simulated. The results of our calculations showed strong dependence of the structure formation on the molecular symmetry, in particular on the (pro)chiral nature of the building block. The simulations predicted the formation of unusual ordered racemic networks with unique aperiodic spatial distribution of the surface enantiomers. Molecular symmetry was also found to have significant influence on the enantiopure self-assembly which resulted in the Kagome and brickwall networks and other less ordered extended superstructures with parallelogram pores. The theoretical findings of this contribution can be relevant to designing and on-surface synthesis of molecular superstructures with predefined geometries and functions.

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This article was published in the following journal.

Name: Chemphyschem : a European journal of chemical physics and physical chemistry
ISSN: 1439-7641
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