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Thiacalix[4]arene: New protection for metal nanoclusters

Surface organic ligands are critical for the formation and properties of atomically precise metal nanoclusters. In contrast to the conventionally used protective ligands such as thiolates and phosphines, thiacalix[4]arene has been used in the synthesis of a silver nanocluster, [Ag(35)(H(2)L)(2)(L)(C...

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Detalles Bibliográficos
Autores principales: Guan, Zong-Jie, Zeng, Jiu-Lian, Nan, Zi-Ang, Wan, Xian-Kai, Lin, Yu-Mei, Wang, Quan-Ming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4982710/
https://www.ncbi.nlm.nih.gov/pubmed/27536724
http://dx.doi.org/10.1126/sciadv.1600323
Descripción
Sumario:Surface organic ligands are critical for the formation and properties of atomically precise metal nanoclusters. In contrast to the conventionally used protective ligands such as thiolates and phosphines, thiacalix[4]arene has been used in the synthesis of a silver nanocluster, [Ag(35)(H(2)L)(2)(L)(C≡CBu(t))(16)](SbF(6))(3), (H(4)L, p-tert-butylthiacalix[4]-arene). This is the first structurally determined calixarene-protected metal nanocluster. The chelating and macrocyclic effects make the thiacalix[4]arene a rigid shell that protects the silver core. Upon addition or removal of one silver atom, the Ag(35) cluster can be transformed to Ag(36) or Ag(34) species, and the optical properties are changed accordingly. The successful use of thiacalixarene in the synthesis of well-defined silver nanoclusters suggests a bright future for metal nanoclusters protected by macrocyclic ligands.