One-Dimensionally Disordered Chiral Sorting by Racemic Tiling in a Surface-Confined Supramolecular Assembly of Achiral Tectons |
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| Authors: | Dr Yi-Qi Zhang Dr Tao Lin Borja Cirera Raphael Hellwig Dr Carlos-Andres Palma Zhi Chen Prof?Dr Mario Ruben Prof?Dr Johannes V Barth Prof?Dr Florian Klappenberger |
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| Institution: | 1. Physik-Department E20, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany;2. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany |
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| Abstract: | The aggregation of (pro)chiral/achiral molecules into crystalline structures at interfaces forms conglomerates, racemates, and solid solutions, comparable to known bulk phases. Scanning tunneling microscopy and Monte Carlo simulations were employed to uncover a distinct racemic phase, expressing 1D disordered chiral sorting through random tiling in surface-confined supramolecularly assembled achiral 4,4′′-diethynyl-1,1′:4′,1′′-terphenyl molecules. The configurational entropy of the 1D disordered racemic tiling phase was verified by analytical modeling, and found to lie between that of a perfectly ordered 2D racemate and a racemic solid solution. |
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| Keywords: | chirality entropy random tiling scanning tunneling microscopy self-assembly |
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