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Issue 47, 2013
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Self-assembly of molecular tripods in two dimensions: structure and thermodynamics from computer simulations

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Abstract

Controlled self-organization of molecular building blocks into low-dimensional ordered superstructures is a promising method of fabrication of functional materials with tunable physico-chemical properties. In this contribution we use the Parallel Tempering Monte Carlo simulation method to study the self-assembly of tripod molecules adsorbed on a triangular lattice being an analog of a graphite surface. In the adopted approach the molecules were assumed to be flat rigid C3-symmetric structures composed of a central segment connected with three n-membered arms. Our primary objective was to examine the effect of molecular size, n on the topology of the corresponding phase diagrams and to identify stable ordered phases with different morphologies. It was demonstrated that for the tripod molecules with sufficiently long arms (n > 1), the self-assembly leads to the formation of scalable chiral porous networks with hexagonal void spaces. For these systems the phase coexistence was found to be described by phase diagrams with the same overall topology. On the other hand, the simulations performed for the small tripods with n = 1 revealed the formation of compact patterns, resulting in a substantial change in the shape of the phase diagram. The insights from our theoretical investigations can be helpful in designing 2D self-assembled molecular architectures comprising C3-symmetric functional units.

Graphical abstract: Self-assembly of molecular tripods in two dimensions: structure and thermodynamics from computer simulations

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Article information


Submitted
25 Sep 2013
Accepted
17 Oct 2013
First published
17 Oct 2013

RSC Adv., 2013,3, 25159-25165
Article type
Paper

Self-assembly of molecular tripods in two dimensions: structure and thermodynamics from computer simulations

P. Szabelski, W. Rżysko, T. Pańczyk, E. Ghijsens, K. Tahara, Y. Tobe and S. De Feyter, RSC Adv., 2013, 3, 25159
DOI: 10.1039/C3RA45342A

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