Amplification of Enantioselectivity on Solid Surfaces Using Nonchiral Adsorbates

作者：Karakalos Stavros; Zaera Francisco^*

来源：Journal of Physical Chemistry C, 2015, 119(24): 13785-13790.

DOI：10.1021/acs.jpcc.5b04452

The amplification of enantioselectivity during the adsorption of chiral molecules on solid surfaces by using nonchiral agents was demonstrated for the case of Pt(111) seeded with a small amount of enantiopure propylene oxide and then dosed with propylene as the amplifier. Chiral chemical titration and isothermal kinetic adsorption experiments using collimated effusive molecular beams indicated the possibility of reaching enantioselectivity excesses of over 60% this way. Monte Carlo simulations provided a kinetic explanation for this effect in terms of both an adsorbate-assisted adsorption process and a bias in the chiral configuration the propylene molecules are driven to upon adsorption on the surface.

• 出版日期2015-6-18