An Ultrastable 155-Nuclei Silver Nanocluster Protected by Thiacalix[4]arene and Cyclohexanethiol for Photothermal Conversion

Autor: Zhi Wang, Fahri Alkan, Christine M. Aikens, Mohamedally Kurmoo, Zhen‐Yi Zhang, Ke‐Peng Song, Chen‐Ho Tung, Di Sun
Rok vydání: 2022
Předmět:
Zdroj: Angewandte Chemie (International ed. in English). 61(31)
ISSN: 1521-3773
Popis: © 2022 Wiley-VCH GmbH.Thiacalix[4]arenes have emerged as a family of macrocyclic ligands to protect metal nanoparticles, but it remains a great challenge to solve the mystery of their structures at the atomic level, especially for those larger than 2 nm. Here, we report the largest known mixed-valence silver nanocluster [Ag155(CyS)40(TC4A)5Cl2] (Ag155) protected by deprotonated cyclohexanethiol (CySH) and macrocyclic ligand p-tert-butylthiacalix[4]arene (H4TC4A). Its single-crystal structure consists of a metallic core of four concentric shells, Ag13@Ag42@Ag30@Ag70, lined with a organic skin of 40CyS− and 5TC4A4− and 2Cl−. Ag155 manifests an unusual pseudo-5-fold symmetry dictated by the intrinsic metal atom packing and the regioselective distribution of mixed protective ligands. This work not only reveals a macrocyclic ligand effect on the formation of a large silver nanocluster, but also provides a new structural archetype for comprehensively perceiving their interface and metal kernel structures.
Databáze: OpenAIRE