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Heterochiral Self-Discrimination-Driven Supramolecular Self-Assembly of Decanuclear Gold(I)-Sulfido Complexes into 2D Nanostructures with Chiral Anions-Tuned Morphologies.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-29 , DOI: 10.1002/anie.202009728
Liao-Yuan Yao 1 , Zhen Chen 1 , Kaka Zhang 1 , Vivian Wing-Wah Yam 1
Affiliation  

Chiral self‐recognition and self‐discrimination are of vital importance to biological processes. In this work, 2D regular rhombic nanocrystals (RS‐NC) were fabricated through heterochiral self‐discrimination between chiral polynuclear gold(I)‐sulfido complex enantiomers, [(R‐BINAP)4Au10S4]Cl2 (R‐Au10) and [(S‐BINAP)4Au10S4]Cl2 (S‐Au10), in MeOH without the need for any surfactants or templates. The monitoring of nanocrystals (NCs) formation by TEM and DLS has uncovered the self‐assembly process and shape evolution of the NCs and revealed a screw‐dislocation dictated spiral growth of the rhombic NCs. Upon addition of chiral anions, the morphology of the gold NCs was found to change from rhombic to strip and quasi‐hexagonal nanosheets, arising from reverse and rotational layer‐by‐layer stacking to give the bilayer NCs. By applying a high temperature, rhombic gold nanoisland films were obtained from the rhombic NCs. The current study has provided a simple strategy towards the construction of regular geometric 2D NCs as well as their chiral anion‐tuned and reverse and rotational stacking‐determined morphology change by heterochiral self‐discrimination.

中文翻译:

杂核自歧视驱动超分子自组装的手性负离子调谐形态的十核金(I)-硫化物络合物成二维纳米结构。

手性自我识别和自我歧视对生物过程至关重要。在这项工作中,通过手性多核金(I)-硫代复合物对映体[(R -BINAP)4 Au 10 S 4 ] Cl 2R -Au)之间的杂手性自识别,制备了二维规则的菱形纳米晶体(RS -NC)。10)和[(S BINAP)4 Au 10 S 4 ] Cl 2S ‐Au 10)中,无需任何表面活性剂或模板。TEM和DLS对纳米晶体(NCs)形成的监测揭示了NC的自组装过程和形状演变,并揭示了螺杆错位决定了菱形NC的螺旋生长。加入手性阴离子后,发现金纳米管的形态从菱形变为条形和准六边形纳米片,这是由于反向和旋转的逐层堆叠产生双层NC所致。通过施加高温,从菱形NCs获得菱形金纳米岛膜。当前的研究提供了一种简单的策略,可用于构造规则的二维二维NC以及通过手性阴离子进行手性阴离子调节,反向和旋转堆叠确定的形态变化。
更新日期:2020-07-29
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