journal article·2024-05-28

Chiroptical Activity Amplification of Chiral Metal Nanoclusters via Surface/Interface Solidification

Simin Li, Ying Liu, Xiongkai Tang, Zhen Xu, Lushan Lin, Zhenlang Xie, Rong Huo, Zi-Ang Nan, Zong-Jie Guan, Hui Shen, Nanfeng Zheng

ACS Nano· Volume 18· Issue 21
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Abstract

It remains a grand challenge to amplify the chiroptical activity of chiral metal nanoclusters (NCs) although it is desirable for fundamental research and practical application. Herein, we report a strategy of surface/interface solidification (SIS) for enhancing the chiroptical activity of gold NCs. Structural analysis of [Au 19 (2 R,4 R /2 S,4 S -BDPP) 6 Cl 2 ] 3+ (BDPP is 2,4-bis(diphenylphosphino)pentane) clusters reveals that one of the interfacial gold atoms is flexible between two sites and large space is present on the surface, thus hampering chirality transfer from surface chiral ligands to metal core and leading to low chiroptical activity. Following SIS by filling the flexible sites and replacing chlorides with thiolate ligands affords another pair of [Au 20 (2 R,4 R /2 S,4 S -BDPP) 6 (4-F-C 6 H 4 S) 2 ] 4+, which shows a more compact and organized structure and thus an almost 40-fold enhancement of chiroptical activity. This work not only provides an efficient approach for amplifying the chiroptical activity of metal nanoclusters but also highlights the significance of achiral components in shaping chiral nanostructures.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Nanocluster Synthesis and Applications · Molecular spectroscopy and chirality · Gold and Silver Nanoparticles Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China

New Cornerstone Science Laboratory, State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National and Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China

College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361102, China

Funding

Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region · National Key Research and Development Program of China · Inner Mongolia University · National Natural Science Foundation of China · New Cornerstone Science Foundation

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