Synthesis of Chiral Au Nanocrystals with Precise Homochiral Facets for Enantioselective Surface Chemistry,Nano Letters

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Synthesis of Chiral Au Nanocrystals with Precise Homochiral Facets for Enantioselective Surface Chemistry
Nano Letters ( IF 9.6 ) Pub Date : 2022-04-01 , DOI: 10.1021/acs.nanolett.2c00094
Fengxia Wu _{1,

2} , Yu Tian _{1,

2} , Xiaoxi Luan _{1,

2} , Xiali Lv _{1,

2} , Fenghua Li _{1,

2} , Guobao Xu _{1,

2} , Wenxin Niu _{1,

2}

Affiliation

Metal surfaces with intrinsic chirality play an irreplaceable role in many significant enantioselective chemical processes such as enantioselective catalysis, sensing, and separation. Nonetheless, current methods for the precise preparation of such chiral surfaces suffer with issues of unscalable production and low surface areas. Herein, we report the synthesis of chiral Au nanoparticles with precisely determined homochiral facets. Though a scalable wet chemical method, {125̅8}^R and {85̅12}^S high-Miller-index facets are obtained with the l- and d-chiral Au nanocrystals, respectively. The growth process of these homochiral facets is investigated, and a new nanocrystal growth pathway is revealed. More importantly, the remarkable enantioselective recognition properties of these homochiral surfaces are demonstrated and enable an efficient electrochemical method for chiral discrimination of l-/d-tryptophan. These results provide a foundation of fundamental studies of heterogeneous enantioselective processes and may pave way for the development of nanocatalysts for enantioselective chemistry.

中文翻译：

用于对映选择性表面化学的具有精确同手性面的手性金纳米晶体的合成

具有内在手性的金属表面在对映选择性催化、传感和分离等许多重要的对映选择性化学过程中发挥着不可替代的作用。尽管如此，目前用于精确制备此类手性表面的方法存在无法规模化生产和低表面积的问题。在此，我们报告了具有精确确定的纯手性面的手性金纳米粒子的合成。通过可扩展的湿化学方法，{125̅8} ^R和 {85̅12} ^S高米勒指数刻面是通过l - 和d获得的-手性Au纳米晶体，分别。研究了这些纯手性小平面的生长过程，并揭示了一种新的纳米晶体生长途径。更重要的是，这些纯手性表面的显着对映选择性识别特性得到了证明，并为手性鉴别l-/ d-色氨酸提供了一种有效的电化学方法。这些结果为非均相对映选择性过程的基础研究奠定了基础，并可能为开发用于对映选择性化学的纳米催化剂铺平道路。

更新日期：2022-04-01

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