Interfacial Chiral Selection by Bulk Species |
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Authors: | Dr Hua Dong Dr Jordi Ignés‐Mullol Dr Josep Claret Dr Lourdes Pérez Dr Aurora Pinazo Prof?Dr Francesc Sagués |
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Institution: | 1. Departament de Química Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalunya (Spain);2. Institut de Química Avan?ada de Catalunya, IQAC‐CSIC, Jordi Girona 18–26, 08034 Barcelona, Catalunya (Spain) |
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Abstract: | A chiral selection process in a self‐assembled soft monolayer of an achiral amphiphile as a consequence of its interaction with chiral species dissolved in the aqueous subphase, is reported. The extent of the chiral selection is statistically measured in terms of the enantiomorphic excess of self‐assembled submillimeter domains endowed with well‐defined orientational chirality that is unambiguously resolved using optical microscopy. Our results show that the emergence of chirality is mediated by electrostatic interactions and significantly enhanced by hydrophobic effects. This chiral chemical effect can be suppressed and even reversed by opposing a macroscopic physical influence, such as vortical stirring. This result gives evidence for the crucial role of hydrodynamic effects in supramolecular aggregation. |
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Keywords: | amino acids chirality Langmuir monolayers surface chemistry supramolecular chemistry |
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