Health & Environmental Research Online (HERO)


Print Feedback Export to File
7729994 
Journal Article 
[Ag15H13(DPPH)(5)](2)+ and [Ag27H22(DPPB)(7)](3+): Two New Hydride and Phosphine Co-Protected Clusters and Their Fragmentation Leading to Naked Clusters, Ag-13(+) and Ag-25(+) 
Jash, M; Khatun, E; Chakraborty, P; Sudhakar, C; Pradeep, T 
2020 
Yes 
Journal of Physical Chemistry C
ISSN: 1932-7447
EISSN: 1932-7455 
American Chemical Society 
124 
37 
20569-20577 
English 
WOS:000574908200071 
Here, we report the synthesis of two new hydride and phosphine coprotected clusters [Ag15H13(DPPH)5]2+ (DPPH = 1,6-bis(diphenylphosphino)hexane) and [Ag27H22(DPPB)7]3+ (DPPB = 1,4-bis(diphenylphosphino)butane). The cluster composition was confirmed by high-resolution electrospray ionization mass spectrometric (HRESI MS) studies and also by other supporting data. To the best of our knowledge, the newly synthesized [Ag15H13(DPPH)5]2+ and [Ag27H22(DPPB)7]3+ clusters are the smallest and the largest known hydride and phosphine coprotected silver clusters, respectively, synthesized in the solution phase. Collision-induced dissociation (CID) was used to probe their fragmentation pattern in the gas phase, which also supported their compositions. During the CID experiment, naked clusters Ag13+ and Ag25+ got formed starting from the ligated Ag15 and Ag27 clusters, respectively, where the number of metal atoms remained nearly the same as in the parent clusters. Collision energy-dependent fragmentation pathways of the formation of naked clusters have been explored in detail. We suggest that silver clusters protected by hydride and phosphine ligands may become useful precursors to make new naked clusters in the gas phase. Copyright © 2020 American Chemical Society.