Notre Dame Research

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  Article

  Variations in electronic states of coumarin hexanethiolate-labeled i-Au25 and bi-Au25 clusters
  

  Author(s):

  Angela Meola, Nicole Hondroglannis, Pierce Brown, Maksym Zhukovskyi, Zheng Zheng, Zeev Rosenzweig, Mary Sajini Devadas

  Abstract:

  Icosahedron and [Au25(PPh)10(C6H14S)5Cl2]2+ bi-icosahedron clusters were synthesized. Ligand exchange reactions were carried out with a new coumarin-derived fluorophore (Cou-SH) to label both clusters. Labeled and unlabeled Au25 were compared and the changes in the electronic structure were determined. The labeled clusters showed marked changes in electronic states, as evidenced by the quenching in the UV region and enhancement in the near infrared. The quantum yield from Cou-SH decreased and…

  Date Published:

  2019-08

  Record Visibility:

  Public