Header menu link for other important links
X
Confining an Ag10 Core in an Ag12 Shell: A Four-Electron Superatom with Enhanced Photoluminescence upon Crystallization
Esma Khatun, Mohammad Bodiuzzaman, Korath Shivan Sugi, Papri Chakraborty, Ganesan Paramasivam, Wakeel Ahmed Dar, Tripti Ahuja, Sudhadevi Antharjanam,
Published in American Chemical Society
2019
PMID: 31017759
Volume: 13
   
Issue: 5
Pages: 5753 - 5759
Abstract
We introduce a cluster coprotected by thiol and diphosphine ligands, [Ag22(dppe)4(2,5-DMBT)12Cl4]2+ (dppe = 1,2-bis(diphenylphosphino)ethane; 2,5-DMBT= 2,5-dimethylbenzenethiol), which has an Ag10 core encapsulated by an Ag12(dppe)4(2,5-DMBT)12Cl4 shell. The Ag10 core comprises two Ag5 distorted trigonal bipyramidal units and is uncommon in Au and Ag nanoclusters. The electrospray ionization mass spectrum reveals that the cluster is divalent and contains four free electrons. An uncommon crystallization-induced enhancement of emission is observed in the cluster. The emission is weak in the solution and amorphous states. However, it is enhanced 12 times in the crystalline state compared to the amorphous state. A detailed investigation of the crystal structure suggests that well-arranged C-H⋯πand π⋯πinteractions between the ligands are the major factors for this enhanced emission. Further, in-depth structural elucidation and density functional theory calculations suggest that the cluster is a superatom with four magic electrons. © 2019 American Chemical Society.
About the journal
JournalData powered by TypesetACS Nano
PublisherData powered by TypesetAmerican Chemical Society
ISSN19360851
Open AccessNo
Concepts (18)
  •  related image
    Crystal structure
  •  related image
    Crystalline materials
  •  related image
    Electrons
  •  related image
    Electrospray ionization
  •  related image
    Ethane
  •  related image
    Ligands
  •  related image
    Mass spectrometry
  •  related image
    Nanoclusters
  •  related image
    Photoluminescence
  •  related image
    2,5-DIMETHYLBENZENETHIOL
  •  related image
    DIPHOSPHINE LIGAND
  •  related image
    ELECTROSPRAY IONIZATION MASS SPECTRA
  •  related image
    Emission enhancement
  •  related image
    ENHANCED EMISSION
  •  related image
    STRUCTURAL ELUCIDATION
  •  related image
    SUPERATOM
  •  related image
    Trigonal bipyramidal
  •  related image
    Density functional theory