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Spontaneous Resolution of Chiral Multi-Thiolate-Protected Ag(30) Nanoclusters

[Image: see text] Despite significant progress achieved in the preparation of chiral nanoparticles, the enantioseparation of racemates still presents a big challenge in nanomaterial research. Herein, we report the synthesis and structural characterization of racemic anisotropic nanocluster Ag(30)(C(...

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Detalles Bibliográficos
Autores principales: Huang, Jia-Hong, Wang, Zhao-Yang, Zang, Shuang-Quan, Mak, Thomas C. W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7706080/
https://www.ncbi.nlm.nih.gov/pubmed/33274274
http://dx.doi.org/10.1021/acscentsci.0c01045
Descripción
Sumario:[Image: see text] Despite significant progress achieved in the preparation of chiral nanoparticles, the enantioseparation of racemates still presents a big challenge in nanomaterial research. Herein, we report the synthesis and structural characterization of racemic anisotropic nanocluster Ag(30)(C(2)B(10)H(9)S(3))(8)Dppm(6) (Ag(30)-rac), which is protected by mixed carboranetrithiolate and phosphine ligands. Spontaneous self-resolution of the racemates was realized through conglomerate crystallization in dimethylacetamide (DMAc). The homochiral nanoclusters in the racemic conglomerates adopt enantiomeric helical self-assemblies (R/L-Ag(30)). Diverse noncovalent interactions as the driving force in directing superstructure packing were elucidated in detail. Furthermore, the nanoclusters show red luminescence in both solid and solution states, and the racemic conglomerates display a mirror-image CPL response. This work provides atom-precise helical nanoparticle superstructures that facilitate an in-depth understanding of the helical-assembly mechanism.