Journal
ACS OMEGA
Volume 3, Issue 6, Pages 6237-6242Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.8b01096
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Funding
- Elements Strategy Initiative for Catalysts & Batteries (ESICB)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [JP17H01182]
- Sasakawa Scientific Research Grant from the Japan Science Society
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We herein investigated collision-induced dissociation (CID) processes of undecagold clusters protected by mixed ligands [Au-11(PPh3)(8)X-2](+) (X = Cl, C CPh) using mass spectrometry and density functional theory calculations. The results showed that the CID produced fragment ions [Au-x(PPh3)(y)X-z](+) with a formal electron count of eight via sequential loss of PPh3 ligands and AuX(PPh3) units in a competitive manner, indicating that the CID channels are governed by the electronic stability of the fragments. Interestingly, the branching fraction of the loss of the AuX(PPh3) units was significantly smaller for X = C CPh than that for X = Cl. We ascribed the effect of X on the branching fractions of dissociations of PPh3 and AuX(PPh3) to the steric difference.
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