Mass spectrometric identification of Au68(SR)34 molecular gold nanoclusters with 34-electron shell closing.
The molecular formula Au(68)(SCH(2)CH(2)Ph)(34) has been assigned to the 14 kDa nanocluster using MALDI-TOF mass spectrometry. The 34-electron shell closing in a macroscopically obtained thiolated gold nanocluster is demonstrated. The Au(68) nanocluster is predicted to have a 49 atom Marks decahedral core with 19 inner core atoms and 30 outer atoms chelating with the staple motifs. The nanoclusters' predicted formulation is [Au](19+30) [Au(SR)(2)](11) [Au(2)(SR)(3)](4).
Dass
Amala
A
Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, USA. amal@olemiss.edu