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刘宽冠、江德恩等在美国化学会刊发表新作
2020/9/25 1:28:48 | 浏览:1284 | 评论:0

All-Carboxylate-Protected Superatomic Silver Nanocluster with an Unprecedented Rhombohedral Ag8 Core

  • Kuan-Guan Liu*
    State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering and Ningxia Key Laboratory for Photovoltaic Materials, Ningxia University, Yinchuan, Ningxia 750021, China
    *Email:liukuanguan@nxu.edu.cn
  • Xue-Mei Gao
    State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering and Ningxia Key Laboratory for Photovoltaic Materials, Ningxia University, Yinchuan, Ningxia 750021, China
    More by Xue-Mei Gao
  • Tongyu Liu
    Department of Chemistry, University of California, Riverside, California 92521, United States
    More by Tongyu Liu
  • Mao-Lin Hu*
    College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
    *Email:maolin_hu@yahoo.com
    More by Mao-Lin Hu
  • De-en Jiang*
    Department of Chemistry, University of California, Riverside, California 92521, United States
    *Email:djiang@ucr.edu
    More by De-en Jiang
Cite this:J. Am. Chem. Soc. 2020, XXXX, XXX, XXX-XXX
Publication Date(Web):September 17, 2020
https://doi.org/10.1021/jacs.0c06682
 
Copyright © 2020 American Chemical Society
 
 
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Abstract

刘宽冠、江德恩等在美国化学会刊发表新作

We report the synthesis and structure of the first all-carboxylate-protected superatomic silver nanocluster. It was prepared by heating a dimethylformamide solution of perfluoroglutaric acid and AgNO3 under alkaline conditions, yielding a single crystal of [(CH32NH2]6[Ag8(pfga)6]. The [Ag8(pfga)6]6– cluster has a rhombohedral Ag86+ core, with each of its faces protected by one dianionic perfluoroglutarate(pfga)ligand. Electronic-structure analysis from density functional theory confirms the stability of this two-electron cluster due to the shell closing of the superatomic orbital in the(1S)2 configuration and explains the optical absorption of the cluster in the visible region as the transition from 1S to 1P orbital. The [Ag8(pfga)6]6– cluster emits bright green-yellow light in THF solution and bright orange light in the solid state. This work opens the door to using the widely available carboxylic acids to synthesize atomically precise Ag clusters of attractive properties.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.0c06682.

  • Synthesis, characterization, and computational details; crystallographic data; XPS, additional ESI-MS, UV–vis absorption, and photoluminescence decay data; hydrogen bonds in the crystal; electron-density difference analysis of ligand bonding; stability over time(PDF

  • Crystallographic data for 1CIF

All-Carboxylate-Protected Superatomic Silver Nanocluster with an Unprecedented Rhombohedral Ag8 Core

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