In this article, chiral templating of a polycarbonate (PC) membrane by (-)-α-pinene using the atomic layer deposition (ALD) approach is investigated. The templating with the enantiomer of (-)-α-pinene, used as a case compound, was performed either on the original commercial PC membrane or on the PC membrane with a beforehand deposited Al2O3 layer. The efficiency of the templating was assessed by a difference in the membrane ability to adsorb/absorb (-)-α-pinene, (+)-α-pinene, and their racemic mixture, using a very sensitive gas sorption analyzer. The results clearly show that the solution-diffusion mechanism rather than the sieving mechanism applied for adsorption/absorption of (-/+)-α-pinene enantiomers, which have the same size of the molecule. The PC membrane with the predeposited Al2O3 before the (-)-α-pinene templating shows significantly higher sorption of (-)-α-pinene compared to (+)-α-pinene and racemate, which clearly demonstrates the presence of a chiral recognition effect.

Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam Cs Legii 565 53002 Pardubice Czech Republic

Central European Institute of Technology Brno University of Technology Purkynova 123 612 00 Brno Czech Republic

Department of Physical Chemistry Faculty of Chemical Technology University of Pardubice Studentska 573 532 10 Pardubice Czech Republic

Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojova 135 165 02 Prague 6 Suchdol Czech Republic

Institute of Macromolecular Chemistry The Czech Academy of Sciences Heyrovsky Sq 2 162 06 Prague 6 Czech Republic

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