Chiral Metal Surface

In this crystal lattice system, all surfaces with Miller indices, (hkl), satisfying the conditions h x k x 1 and h k l h are chiral [11]. Although such high Miller index surfaces have been studied for decades, it was not until recently that McFadden et al. specifically pointed out and demonstrated that their low synunetry structures render them chiral and, therefore, that they might have enantiospecific interactions with chiral adsorbates [12]. There has been a growing interest in the enantiospecific properties of naturally chiral metal surfaces and in the possibility of using such surfaces for enantioselective chemical processes. 

The thermal roughening of naturally chiral metal surfaces must have some impact on their enantiospecific interactions with chiral adsorbates. Sholl et al. have also studied the effects of step roughening on the adsorption of small chiral molecules [11, 17]. Molecular simulation of small chiral alkanes adsorbed on ideal and roughened Pt(643) surfaces revealed that enantioselectivity is preserved during... 

Enantioselective Surface Chemistry on Chiral Metal Surfaces... 

The enantioselectivities of reactions on chiral surfaces are of interest from a practical standpoint and are the result of enantiospecific differences in reaction energetics and reaction barriers. Another manifestation of the enantiospecific interaction between a chiral adsorbate and a chiral surface is adsorbate orientation. Enantiospecific orientations of chiral adsorbates on naturally chiral metal surfaces have been predicted by molecular simulation studies. The first studies using Monte Carlo methods to study chiral cycloalkanes adsorbed on chiral surfaces pre-... 

Mallat T, Orglmeister E, Baiker A (2007) Asymmetric catalysis at chiral metal surfaces. Chem Rev 107 4863... 

Shell DS, Asthagiri A, Power TD (2001) Naturally chiral metal surfaces as enantiospecific adsorbents. 1 Phys Chem B 105 4771... 

McFadden CF, Cremer PS, Gellman A1 (1996) Adsorption of chiral alcohols on chiral metal surfaces. Langmuir 12 2483... 

Schunack M, Laegsgaard E, Stensgaard I, Johannsen 1, Besenbacher F (2001) A chiral metal surface. Angew Chem Int Ed 40 2623... 

Humblot V, Raval R (2005) Chiral metal surfaces from the adsorption of chiral and achiral molecules. Appl Surf Sci 241 150... 

Surface science results have thrown new light on modified (chiral) metal surfaces, highlighting new phenomena such as complex adsorption phases, two-dimensional organization and the creation of extended chiral surfaces [307]. New strategies to immobilize an asymmetric catalyst onto a support (adsorption, encapsulation, tethering using a covalent bond and electrostatic interaction) also result in an... 

Chirally modified Attaching chiral metal surface auxiliary to reactant... 

Attard, G.A. 2001. Electrochemical studies of enantioselectivity at chiral metal surfaces. Journal of Physical Chemistry B 105, 3158-3167. 

Keywords. 3-Functionalized ketones, a-Keto acid derivatives. Cinchona modified Pt catalysts. Chiral imprints. Chiral metal surfaces. Chiral polymers. Cyanohydrin formation. Cyclic Dipeptides, Epoxidation catalysts. Heterogeneous catalysts. Hydrogenation catalysts. Modified metal oxides. Polypeptides, Tartrate-modified Nickel catalysts... 

Chiral metal surfaces. Inherently chiral Ag metal surfaces were produced by cutting along the (643) surface to give Ag(643) and Ag(643) and characterization by LEED [47]. Not so surprisingly, no difference was detected for adsorption and decomposition of (R) and (S)-2-butanol. 

Hi) Formation of chiral metal surfaces by electrodeposition in the presence of a chiral ionic medium. 

Formation of Chiral Metal Surfaces by Electrodeposition in the Presence of a Chiral Ionic Medium... 

Amorphous phases A new field of applications of chiroptical analyses is the search of chiral structures in Langmuir-Blodgett films or thin films of polymers, membranes, and chiral surfaces , surfaces on which a few chiral molecules are adsorbed. The recently published technique of reflectivity CD may allow systematic analyses of chiral metal surfaces. This field is too new to be summarized and, therefore, some selected papers have been cited in the Further reading section. 

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